1
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Teng Z, Yang H, Zhang Q, Cai W, Lu YR, Kato K, Zhang Z, Ding J, Sun H, Liu S, Wang C, Chen P, Yamakata A, Chan TS, Su C, Ohno T, Liu B. Atomically dispersed low-valent Au boosts photocatalytic hydroxyl radical production. Nat Chem 2024:10.1038/s41557-024-01553-6. [PMID: 38918581 DOI: 10.1038/s41557-024-01553-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 05/03/2024] [Indexed: 06/27/2024]
Abstract
Providing affordable, safe drinking water and universal sanitation poses a grand societal challenge. Here we developed atomically dispersed Au on potassium-incorporated polymeric carbon nitride material that could simultaneously boost photocatalytic generation of ·OH and H2O2 with an apparent quantum efficiency over 85% at 420 nm. Potassium introduction into the poly(heptazine imide) matrix formed strong K-N bonds and rendered Au with an oxidation number close to 0. Extensive experimental characterization and computational simulations revealed that the low-valent Au altered the materials' band structure to trap highly localized holes produced under photoexcitation. These highly localized holes could boost the 1e- water oxidation reaction to form highly oxidative ·OH and simultaneously dissociate the hydrogen atom in H2O, which greatly promoted the reduction of oxygen to H2O2. The photogenerated ·OH led to an efficiency enhancement for visible-light-response superhydrophilicity. Furthermore, photo-illumination in an onsite fixed-bed reactor could disinfect water at a rate of 66 L H2O m-2 per day.
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Affiliation(s)
- Zhenyuan Teng
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, China
| | - Hongbin Yang
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, China
| | - Qitao Zhang
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, China
| | - Wenan Cai
- Department of Applied Chemistry, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu-shi, Japan
| | - Ying-Rui Lu
- National Synchrotron Radiation Research Center, Hsinchu, Taiwan
| | - Kosaku Kato
- Department of Chemistry, Okayama University, Okayama-shi, Japan
| | - Zhenzong Zhang
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, Singapore
| | - Jie Ding
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, China
| | - Han Sun
- The Third Affiliated Hospital of Soochow University, Changzhou, China
| | - Sixiao Liu
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, China
| | - Chengyin Wang
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, China
| | - Peng Chen
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, Singapore
| | - Akira Yamakata
- Department of Chemistry, Okayama University, Okayama-shi, Japan
| | - Ting-Shan Chan
- National Synchrotron Radiation Research Center, Hsinchu, Taiwan
| | - Chenliang Su
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, China.
| | - Teruhisa Ohno
- Department of Applied Chemistry, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu-shi, Japan.
| | - Bin Liu
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, China.
- Department of Chemistry, Hong Kong Institute of Clean Energy and Center of Super-Diamond and Advanced Films, City University of Hong Kong, Hong Kong SAR, China.
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2
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Yang S, Liu X, Li S, Yuan W, Yang L, Wang T, Zheng H, Cao R, Zhang W. The mechanism of water oxidation using transition metal-based heterogeneous electrocatalysts. Chem Soc Rev 2024; 53:5593-5625. [PMID: 38646825 DOI: 10.1039/d3cs01031g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/23/2024]
Abstract
The water oxidation reaction, a crucial process for solar energy conversion, has garnered significant research attention. Achieving efficient energy conversion requires the development of cost-effective and durable water oxidation catalysts. To design effective catalysts, it is essential to have a fundamental understanding of the reaction mechanisms. This review presents a comprehensive overview of recent advancements in the understanding of the mechanisms of water oxidation using transition metal-based heterogeneous electrocatalysts, including Mn, Fe, Co, Ni, and Cu-based catalysts. It highlights the catalytic mechanisms of different transition metals and emphasizes the importance of monitoring of key intermediates to explore the reaction pathway. In addition, advanced techniques for physical characterization of water oxidation intermediates are also introduced, for the purpose of providing information for establishing reliable methodologies in water oxidation research. The study of transition metal-based water oxidation electrocatalysts is instrumental in providing novel insights into understanding both natural and artificial energy conversion processes.
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Affiliation(s)
- Shujiao Yang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
| | - Xiaohan Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
| | - Sisi Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
| | - Wenjie Yuan
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
| | - Luna Yang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
| | - Ting Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
| | - Haoquan Zheng
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
| | - Rui Cao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
| | - Wei Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
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3
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Selloni A. Aqueous Titania Interfaces. Annu Rev Phys Chem 2024; 75:47-65. [PMID: 38271659 DOI: 10.1146/annurev-physchem-090722-015957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2024]
Abstract
Water-metal oxide interfaces are central to many phenomena and applications, ranging from material corrosion and dissolution to photoelectrochemistry and bioengineering. In particular, the discovery of photocatalytic water splitting on TiO2 has motivated intensive studies of water-TiO2 interfaces for decades. So far, a broad understanding of the interaction of water vapor with several TiO2 surfaces has been obtained. However, much less is known about liquid water-TiO2 interfaces, which are more relevant to many practical applications. Probing these complex systems at the molecular level is experimentally challenging and is sometimes possible only through computational studies. This review summarizes recent advances in the atomistic understanding, mostly through computational simulations, of the structure and dynamics of interfacial water on TiO2 surfaces. The main focus is on the nature, molecular or dissociated, of water in direct contact with low-index defect-free crystalline surfaces. The hydroxyls resulting from water dissociation are essential in the photooxidation of water and critically affect the surface chemistry of TiO2.
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Affiliation(s)
- Annabella Selloni
- Department of Chemistry, Princeton University, Princeton, New Jersey, USA;
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4
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You P, Chen D, Liu X, Zhang C, Selloni A, Meng S. Correlated electron-nuclear dynamics of photoinduced water dissociation on rutile TiO 2. NATURE MATERIALS 2024:10.1038/s41563-024-01900-5. [PMID: 38777872 DOI: 10.1038/s41563-024-01900-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 04/12/2024] [Indexed: 05/25/2024]
Abstract
Elucidating the mechanism of photoinduced water splitting on TiO2 is important for advancing the understanding of photocatalysis and the ability to control photocatalytic surface reactions. However, incomplete experimental information and complex coupled electron-nuclear motion make the microscopic understanding challenging. Here we analyse the atomic-scale pathways of photogenerated charge carrier transport and photoinduced water dissociation at the prototypical water-rutile TiO2(110) interface using first-principles dynamics simulations. Two distinct mechanisms are observed. Field-initiated electron migration leads to adsorbed water dissociation via proton transfer to a surface bridging oxygen. In the other pathway, adsorbed water dissociation occurs via proton donation to a second-layer water molecule coupled to photoexcited-hole transfer promoted by in-plane surface lattice distortions. Two stages of non-adiabatic in-plane lattice motion-expansion and recovery-are observed, which are closely associated with population changes in Ti3d orbitals. Controlling such highly correlated electron-nuclear dynamics may provide opportunities for boosting the performance of photocatalytic materials.
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Affiliation(s)
- Peiwei You
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Daqiang Chen
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Xinbao Liu
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Cui Zhang
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China.
- Songshan Lake Materials Laboratory, Dongguan, China.
| | | | - Sheng Meng
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, China.
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China.
- Songshan Lake Materials Laboratory, Dongguan, China.
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5
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Mu Y, Chen B, Zhang H, Fei M, Liu T, Mehta N, Wang DZ, Miller AJM, Diaconescu PL, Wang D. Highly Selective Electrochemical Baeyer-Villiger Oxidation through Oxygen Atom Transfer from Water. J Am Chem Soc 2024; 146:13438-13444. [PMID: 38687695 DOI: 10.1021/jacs.4c02601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
The Baeyer-Villiger oxidation of ketones is a crucial oxygen atom transfer (OAT) process used for ester production. Traditionally, Baeyer-Villiger oxidation is accomplished by thermally oxidizing the OAT from stoichiometric peroxides, which are often difficult to handle. Electrochemical methods hold promise for breaking the limitation of using water as the oxygen atom source. Nevertheless, existing demonstrations of electrochemical Baeyer-Villiger oxidation face the challenges of low selectivity. We report in this study a strategy to overcome this challenge. By employing a well-known water oxidation catalyst, Fe2O3, we achieved nearly perfect selectivity for the electrochemical Baeyer-Villiger oxidation of cyclohexanone. Mechanistic studies suggest that it is essential to produce surface hydroperoxo intermediates (M-OOH, where M represents a metal center) that promote the nucleophilic attack on ketone substrates. By confining the reactions to the catalyst surfaces, competing reactions (e.g., dehydrogenation, carboxylic acid cation rearrangements, and hydroxylation) are greatly limited, thereby offering high selectivity. The surface-initiated nature of the reaction is confirmed by kinetic studies and spectroelectrochemical characterizations. This discovery adds nucleophilic oxidation to the toolbox of electrochemical organic synthesis.
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Affiliation(s)
- Yu Mu
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Boqiang Chen
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Hongna Zhang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Muchun Fei
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Tianying Liu
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Neal Mehta
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - David Z Wang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Alexander J M Miller
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Paula L Diaconescu
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Dunwei Wang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
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6
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Li W, Sun J, Wang M, Xu J, Wang Y, Yang L, Yan R, He H, Wang S, Deng WQ, Tian ZQ, Fan FR. Contact-Electro-Catalysis for Direct Oxidation of Methane under Ambient Conditions. Angew Chem Int Ed Engl 2024; 63:e202403114. [PMID: 38488787 DOI: 10.1002/anie.202403114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Indexed: 04/06/2024]
Abstract
The conversion of methane under ambient conditions has attracted significant attention. Although advancements have been made using active oxygen species from photo- and electro- chemical processes, challenges such as complex catalyst design, costly oxidants, and unwanted byproducts remain. This study exploits the concept of contact-electro-catalysis, initiating chemical reactions through charge exchange at a solid-liquid interface, to report a novel process for directly converting methane under ambient conditions. Utilizing the electrification of commercially available Fluorinated Ethylene Propylene (FEP) with water under ultrasound, we demonstrate how this interaction promote the activation of methane and oxygen molecules. Our results show that the yield of HCHO and CH3OH can reach 467.5 and 151.2 μmol ⋅ gcat -1, respectively. We utilized electron paramagnetic resonance (EPR) to confirm the evolution of hydroxyl radicals (⋅OH) and superoxide radicals (⋅OOH). Isotope mass spectrometry (MS) was employed to analyze the elemental origin of CH3OH, which can be further oxidized to HCHO. Additionally, we conducted density functional theory (DFT) simulations to assess the reaction energies of FEP with H2O, O2, and CH4 under these conditions. The implications of this methodology, with its potential applicability to a wider array of gas-phase catalytic reactions, underscore a significant advance in catalysis.
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Affiliation(s)
- Weixin Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, China
| | - Jikai Sun
- Institute of Frontier Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Qingdao, 266237, China
| | - Mingda Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, China
| | - Jiajia Xu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, China
| | - Yanjie Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, China
| | - Li Yang
- Institute of Frontier Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Qingdao, 266237, China
| | - Ran Yan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, China
- National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, Xiamen University, Xiamen, 361005, China
| | - Haoxian He
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, China
| | - Shuai Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, China
- National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, Xiamen University, Xiamen, 361005, China
| | - Wei-Qiao Deng
- Institute of Frontier Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Qingdao, 266237, China
| | - Zhong-Qun Tian
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, China
| | - Feng Ru Fan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, 361005, China
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7
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Maqbool Q, Favoni O, Wicht T, Lasemi N, Sabbatini S, Stöger-Pollach M, Ruello ML, Tittarelli F, Rupprechter G. Highly Stable Self-Cleaning Paints Based on Waste-Valorized PNC-Doped TiO 2 Nanoparticles. ACS Catal 2024; 14:4820-4834. [PMID: 38601782 PMCID: PMC11003396 DOI: 10.1021/acscatal.3c06203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 02/14/2024] [Accepted: 02/14/2024] [Indexed: 04/12/2024]
Abstract
Adding photocatalytically active TiO2 nanoparticles (NPs) to polymeric paints is a feasible route toward self-cleaning coatings. While paint modification by TiO2-NPs may improve photoactivity, it may also cause polymer degradation and release of toxic volatile organic compounds. To counterbalance adverse effects, a synthesis method for nonmetal (P, N, and C)-doped TiO2-NPs is introduced, based purely on waste valorization. PNC-doped TiO2-NP characterization by vibrational and photoelectron spectroscopy, electron microscopy, diffraction, and thermal analysis suggests that TiO2-NPs were modified with phosphate (P=O), imine species (R=N-R), and carbon, which also hindered the anatase/rutile phase transformation, even upon 700 °C calcination. When added to water-based paints, PNC-doped TiO2-NPs achieved 96% removal of surface-adsorbed pollutants under natural sunlight or UV, paralleled by stability of the paint formulation, as confirmed by micro-Fourier transform infrared (FTIR) surface analysis. The origin of the photoinduced self-cleaning properties was rationalized by three-dimensional (3D) and synchronous photoluminescence spectroscopy, indicating that the dopants led to 7.3 times stronger inhibition of photoinduced e-/h+ recombination when compared to a benchmark P25 photocatalyst.
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Affiliation(s)
- Qaisar Maqbool
- Department of Materials, Environmental Sciences and
Urban Planning (SIMAU), Università Politecnica delle Marche, INSTM
Research Unit, via Brecce Bianche 12, 60131 Ancona,
Italy
- Institute of Materials Chemistry, TU
Wien, Getreidemarkt 9/BC, A-1060 Vienna, Austria
| | - Orlando Favoni
- Department of Materials, Environmental Sciences and
Urban Planning (SIMAU), Università Politecnica delle Marche, INSTM
Research Unit, via Brecce Bianche 12, 60131 Ancona,
Italy
| | - Thomas Wicht
- Institute of Materials Chemistry, TU
Wien, Getreidemarkt 9/BC, A-1060 Vienna, Austria
| | - Niusha Lasemi
- Institute of Materials Chemistry, TU
Wien, Getreidemarkt 9/BC, A-1060 Vienna, Austria
| | - Simona Sabbatini
- Department of Materials, Environmental Sciences and
Urban Planning (SIMAU), Università Politecnica delle Marche, INSTM
Research Unit, via Brecce Bianche 12, 60131 Ancona,
Italy
| | - Michael Stöger-Pollach
- University Service Center for Transmission
Electron Microscopy, TU Wien, 1040 Vienna,
Austria
| | - Maria Letizia Ruello
- Department of Materials, Environmental Sciences and
Urban Planning (SIMAU), Università Politecnica delle Marche, INSTM
Research Unit, via Brecce Bianche 12, 60131 Ancona,
Italy
| | - Francesca Tittarelli
- Department of Materials, Environmental Sciences and
Urban Planning (SIMAU), Università Politecnica delle Marche, INSTM
Research Unit, via Brecce Bianche 12, 60131 Ancona,
Italy
| | - Günther Rupprechter
- Institute of Materials Chemistry, TU
Wien, Getreidemarkt 9/BC, A-1060 Vienna, Austria
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8
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Vensaus P, Liang Y, Zigon N, Avarvari N, Mujica V, Soler-Illia GJAA, Lingenfelder M. Hybrid mesoporous electrodes evidence CISS effect on water oxidation. J Chem Phys 2024; 160:111103. [PMID: 38511663 DOI: 10.1063/5.0199339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 03/05/2024] [Indexed: 03/22/2024] Open
Abstract
Controlling product selectivity is essential for improving the efficiency of multi-product reactions. Electrochemical water oxidation is a reaction of main importance in different applications, e.g., renewable energy schemes and environmental protection, where H2O2 and O2 are the two principal products. In this Communication, the product selectivity of electrochemical water oxidation was controlled by making use of the chiral induced spin selectivity (CISS) effect at mesoporous-TiO2 on the molecule-modified Au substrate. Our results show a decrease in H2O2 formation when using chiral hetero-helicene molecules adsorbed on the Au substrate. We propose a mechanism for this kinetic effect based on the onset of CISS-induced spin polarization on the Au-helicene chiral interface. We also present a new tunable substrate to investigate the CISS mechanism.
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Affiliation(s)
- Priscila Vensaus
- Max Planck-EPFL Laboratory for Molecular Nanoscience and Technology, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
- Institute of Physics (IPHYS), École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
- Instituto de Nanosistemas, Escuela de Bio y Nanotecnologías, Universidad Nacional de San Martín, San Martín B1650, Buenos Aires, Argentina
| | - Yunchang Liang
- Max Planck-EPFL Laboratory for Molecular Nanoscience and Technology, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
- Institute of Physics (IPHYS), École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Nicolas Zigon
- Univ Angers, CNRS, MOLTECH-Anjou, SFR MATRIX, F-49000 Angers, France
| | - Narcis Avarvari
- Univ Angers, CNRS, MOLTECH-Anjou, SFR MATRIX, F-49000 Angers, France
| | - Vladimiro Mujica
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, USA
| | - Galo J A A Soler-Illia
- Instituto de Nanosistemas, Escuela de Bio y Nanotecnologías, Universidad Nacional de San Martín, San Martín B1650, Buenos Aires, Argentina
| | - Magalí Lingenfelder
- Max Planck-EPFL Laboratory for Molecular Nanoscience and Technology, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
- Institute of Physics (IPHYS), École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
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9
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Ren G, Zhou M, Wang H. Weakened Interfacial Hydrogen Bond Connectivity Drives Selective Photocatalytic Water Oxidation toward H 2O 2 at Water/Brookite-TiO 2 Interface. J Am Chem Soc 2024; 146:6084-6093. [PMID: 38386422 DOI: 10.1021/jacs.3c13402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
The formation of H2O2 through the two-electron photocatalytic water oxidation reaction (WOR) is significant but encounters the competition with the four-electron O2 evolution reaction. Recent studies showed a crystal-phase dependence in H2O2 selectivity, where high purity brookite TiO2 (b-TiO2) exhibits remarkable H2O2 selectivity in contrast to the common rutile phase TiO2 (r-TiO2). However, the origin of such a structure-induced selectivity preference remains elusive, primarily due to the complexities associated with the solid-liquid interface system and excited-state chemistry. Herein, we conducted a comprehensive investigation into the selectivity mechanism of WOR at the water/b-TiO2(210) and water/r-TiO2(110) interfaces, employing first-principles molecular dynamics simulations and microkinetic analyses. Intriguingly, our results reveal that the intrinsic catalytic ability of the b-TiO2(210) itself does not enhance H2O2 selectivity compared to r-TiO2(110). Instead, it is the weakened interfacial hydrogen bond connectivity, modulated by the herringbone-like local atomic structure of the b-TiO2(210) surface, that determines the selectivity. Specifically, this weakened H-bond connectivity (i.e., local low water density) at the interface, owing to the strong water adsorption and distinct adsorption orientation, can stabilize the OH• radical and inhibit its deprotonation, leading to an improved H2O2 selectivity. By contrast, the relatively strong interface H-bond connectivity established over r-TiO2(110) accelerates the deprotonation of OH•, with the OH• coverage being 3 orders of magnitude lower than at the water/b-TiO2(210) interface. This study quantitatively demonstrates that the local H-bond structure (water density) at the liquid/solid interface significantly influences photocatalytic selectivity, and this insight may offer a rational approach to enhance the H2O2 selectivity.
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Affiliation(s)
- Guanhua Ren
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China
| | - Min Zhou
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China
| | - Haifeng Wang
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China
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10
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Zhang X, Su H, Cui P, Cao Y, Teng Z, Zhang Q, Wang Y, Feng Y, Feng R, Hou J, Zhou X, Ma P, Hu H, Wang K, Wang C, Gan L, Zhao Y, Liu Q, Zhang T, Zheng K. Developing Ni single-atom sites in carbon nitride for efficient photocatalytic H 2O 2 production. Nat Commun 2023; 14:7115. [PMID: 37932292 PMCID: PMC10628073 DOI: 10.1038/s41467-023-42887-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 10/24/2023] [Indexed: 11/08/2023] Open
Abstract
Photocatalytic two-electron oxygen reduction to produce high-value hydrogen peroxide (H2O2) is gaining popularity as a promising avenue of research. However, structural evolution mechanisms of catalytically active sites in the entire photosynthetic H2O2 system remains unclear and seriously hinders the development of highly-active and stable H2O2 photocatalysts. Herein, we report a high-loading Ni single-atom photocatalyst for efficient H2O2 synthesis in pure water, achieving an apparent quantum yield of 10.9% at 420 nm and a solar-to-chemical conversion efficiency of 0.82%. Importantly, using in situ synchrotron X-ray absorption spectroscopy and Raman spectroscopy we directly observe that initial Ni-N3 sites dynamically transform into high-valent O1-Ni-N2 sites after O2 adsorption and further evolve to form a key *OOH intermediate before finally forming HOO-Ni-N2. Theoretical calculations and experiments further reveal that the evolution of the active sites structure reduces the formation energy barrier of *OOH and suppresses the O=O bond dissociation, leading to improved H2O2 production activity and selectivity.
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Affiliation(s)
- Xu Zhang
- Beijing Key Laboratory of Microstructure and Properties of Solids, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
| | - Hui Su
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, Anhui, China
- College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, Hunan, China
| | - Peixin Cui
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China
| | - Yongyong Cao
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing, 314001, Zhejiang, China
| | - Zhenyuan Teng
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, 637459, Singapore
| | - Qitao Zhang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
| | - Yang Wang
- College of Physics and Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing, 400044, China
| | - Yibo Feng
- Beijing Key Laboratory of Microstructure and Properties of Solids, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
| | - Ran Feng
- Beijing Key Laboratory of Microstructure and Properties of Solids, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
| | - Jixiang Hou
- Beijing Key Laboratory of Microstructure and Properties of Solids, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
| | - Xiyuan Zhou
- Beijing Key Laboratory of Microstructure and Properties of Solids, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
| | - Peijie Ma
- Beijing Key Laboratory of Microstructure and Properties of Solids, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
| | - Hanwen Hu
- Beijing Key Laboratory of Microstructure and Properties of Solids, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
| | - Kaiwen Wang
- Beijing Key Laboratory of Microstructure and Properties of Solids, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
| | - Cong Wang
- Beijing Key Laboratory of Microstructure and Properties of Solids, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
| | - Liyong Gan
- College of Physics and Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing, 400044, China
| | - Yunxuan Zhao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China
| | - Qinghua Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, Anhui, China.
| | - Tierui Zhang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China.
| | - Kun Zheng
- Beijing Key Laboratory of Microstructure and Properties of Solids, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China.
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11
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Tada H. Hydrogen peroxide photo-fuel cells. Dalton Trans 2023; 52:14733-14741. [PMID: 37807856 DOI: 10.1039/d3dt02518g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Hydrogen peroxide (H2O2) possesses both strong oxidizing and moderate reducing ability. Due to the unique chemical reactivity, one-compartmentalization of fuel cells is possible by using H2O2 as both the fuel and oxidant for fuel cells (H2O2-FC). To enhance the anode reaction (H2O2 → O2 + 2H+ + 2e-) of the H2O2-FC, a noble metal-free H2O2-photo fuel cell (PFC) has been newly developed for enhancing the conversion from chemical energy to electric energy with only emission of water and oxygen. The H2O2-photo fuel cells (PFC) take several significant advantages over the conventional hydrogen-oxygen fuel cells. With the realization of a solar-driven energy cycle with H2O2 as the key substance in mind, this Frontier article highlights the H2O2-PFCs. Firstly, the fundamentals of the H2O2-PFC are dealt with by treating the prototype using TiO2 as the photoanode. Then, recent progress in the H2O2-PFCs and an emerging application to self-powered biosensors are described. Finally, the conclusions are summarized with the future outlook.
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Affiliation(s)
- Hiroaki Tada
- Institutes of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
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12
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Wang W, Zhou W, Tang Y, Cao W, Docherty SR, Wu F, Cheng K, Zhang Q, Copéret C, Wang Y. Selective Oxidation of Methane to Methanol over Au/H-MOR. J Am Chem Soc 2023. [PMID: 37267262 DOI: 10.1021/jacs.3c04260] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Selective oxidation of methane to methanol by dioxygen (O2) is an appealing route for upgrading abundant methane resource and represents one of the most challenging reactions in chemistry due to the overwhelmingly higher reactivity of the product (methanol) versus the reactant (methane). Here, we report that gold nanoparticles dispersed on mordenite efficiently catalyze the selective oxidation of methane to methanol by molecular oxygen in aqueous medium in the presence of carbon monoxide. The methanol productivity reaches 1300 μmol gcat-1 h-1 or 280 mmol gAu-1 h-1 with 75% selectivity at 150 °C, outperforming most catalysts reported under comparable conditions. Both hydroxyl radicals and hydroperoxide species participate in the activation and conversion of methane, while it is shown that the lower affinity of methanol on gold mainly accounts for higher methanol selectivity.
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Affiliation(s)
- Wangyang Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Wei Zhou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
| | - Yuchen Tang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Weicheng Cao
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Scott R Docherty
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
| | - Fangwei Wu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Kang Cheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Qinghong Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
| | - Ye Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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13
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Zhao Y, Adiyeri Saseendran DP, Huang C, Triana CA, Marks WR, Chen H, Zhao H, Patzke GR. Oxygen Evolution/Reduction Reaction Catalysts: From In Situ Monitoring and Reaction Mechanisms to Rational Design. Chem Rev 2023; 123:6257-6358. [PMID: 36944098 DOI: 10.1021/acs.chemrev.2c00515] [Citation(s) in RCA: 55] [Impact Index Per Article: 55.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
The oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are core steps of various energy conversion and storage systems. However, their sluggish reaction kinetics, i.e., the demanding multielectron transfer processes, still render OER/ORR catalysts less efficient for practical applications. Moreover, the complexity of the catalyst-electrolyte interface makes a comprehensive understanding of the intrinsic OER/ORR mechanisms challenging. Fortunately, recent advances of in situ/operando characterization techniques have facilitated the kinetic monitoring of catalysts under reaction conditions. Here we provide selected highlights of recent in situ/operando mechanistic studies of OER/ORR catalysts with the main emphasis placed on heterogeneous systems (primarily discussing first-row transition metals which operate under basic conditions), followed by a brief outlook on molecular catalysts. Key sections in this review are focused on determination of the true active species, identification of the active sites, and monitoring of the reactive intermediates. For in-depth insights into the above factors, a short overview of the metrics for accurate characterizations of OER/ORR catalysts is provided. A combination of the obtained time-resolved reaction information and reliable activity data will then guide the rational design of new catalysts. Strategies such as optimizing the restructuring process as well as overcoming the adsorption-energy scaling relations will be discussed. Finally, pending current challenges and prospects toward the understanding and development of efficient heterogeneous catalysts and selected homogeneous catalysts are presented.
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Affiliation(s)
- Yonggui Zhao
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | | | - Chong Huang
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Carlos A Triana
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Walker R Marks
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Hang Chen
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Han Zhao
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Greta R Patzke
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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14
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Cheng W, Xu Y, Yang C, Su H, Liu Q. Monitoring surface dynamics of electrodes during electrocatalysis using in situ synchrotron FTIR spectroscopy. JOURNAL OF SYNCHROTRON RADIATION 2023; 30:340-346. [PMID: 36891847 PMCID: PMC10000798 DOI: 10.1107/s1600577523000796] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
Monitoring the surface dynamics of catalysts under working conditions is important for a deep understanding of the underlying electrochemical mechanisms towards efficient energy conversion and storage. Fourier transform infrared (FTIR) spectroscopy with high surface sensitivity has been considered as a powerful tool for detecting surface adsorbates, but it faces a great challenge when being adopted in surface dynamics investigations during electrocatalysis due to the complication and influence of aqueous environments. This work reports a well designed FTIR cell with tunable micrometre-scale water film over the surface of working electrodes and dual electrolyte/gas channels for in situ synchrotron FTIR tests. By coupling with a facile single-reflection infrared mode, a general in situ synchrotron radiation FTIR (SR-FTIR) spectroscopic method is developed for tracking the surface dynamics of catalysts during the electrocatalytic process. As an example, in situ formed key *OOH is clearly observed on the surface of commercial benchmark IrO2 catalysts during the electrochemical oxygen evolution process based on the developed in situ SR-FTIR spectroscopic method, which demonstrates its universality and feasibility in surface dynamics studies of electrocatalysts under working conditions.
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Affiliation(s)
- Weiren Cheng
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, People’s Republic of China
- Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan
| | - Yanzhi Xu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, People’s Republic of China
| | - Chenyu Yang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, People’s Republic of China
| | - Hui Su
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, People’s Republic of China
| | - Qinghua Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, People’s Republic of China
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15
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Wu LW, Liu C, Han Y, Yu Y, Liu Z, Huang YF. In Situ Spectroscopic Identification of the Electron-Transfer Intermediates of Photoelectrochemical Proton-Coupled Electron Transfer of Water Oxidation on Au. J Am Chem Soc 2023; 145:2035-2039. [PMID: 36649589 DOI: 10.1021/jacs.2c11882] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Experimental elucidation of the decoupling of electron and proton transfer at a molecular level is essential for thoroughly understanding the kinetics of heterogeneous (photo)electrochemical proton-coupled electron transfer water oxidation. Here we illustrate the electron-transfer intermediates of positively charged surface oxygenated species on Au (Au-OH+) and their correlations with the rate of water oxidation by in situ microphotoelectrochemical surface-enhanced Raman spectroscopy (SERS) and ambient-pressure X-ray photoelectron spectroscopy. At the intermediate stage of water oxidation, a characteristic blue shift of the vibration of Au-OH species in laser-power-density-dependent measurements was assigned to the light-induced production of Au-OH+ in water oxidation. The photothermal effect was excluded according to the vibrational frequencies of Au-OH species as the temperature was increased in a variable-temperature SERS measurement. Density functional theory calculations evidenced that the frequency blue shift is from the positively charged Au-OH species. The photocurrent-dependent frequency blue shift indicated that Au-OH+ is the key electron-transfer intermediate in water oxidation by decoupled electron and proton transfer.
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Affiliation(s)
- Li-Wen Wu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Chiyan Liu
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yong Han
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.,Center for Transformative Science, ShanghaiTech University, Shanghai 201210, China
| | - Yi Yu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.,Center for Transformative Science, ShanghaiTech University, Shanghai 201210, China
| | - Zhi Liu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.,State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.,Center for Transformative Science, ShanghaiTech University, Shanghai 201210, China
| | - Yi-Fan Huang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
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16
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Sato H, Ishikawa A, Saito H, Higashi T, Takeyasu K, Sugimoto T. Critical impacts of interfacial water on C-H activation in photocatalytic methane conversion. Commun Chem 2023; 6:8. [PMID: 36698026 PMCID: PMC9860031 DOI: 10.1038/s42004-022-00803-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 12/22/2022] [Indexed: 01/22/2023] Open
Abstract
On-site and on-demand photocatalytic methane conversion under ambient conditions is one of the urgent global challenges for the sustainable use of ubiquitous methane resources. However, the lack of microscopic knowledge on its reaction mechanism prevents the development of engineering strategies for methane photocatalysis. Combining real-time mass spectrometry and operando infrared absorption spectroscopy with ab initio molecular dynamics simulations, here we report key molecular-level insights into photocatalytic green utilization of methane. Activation of the robust C-H bond of methane is hardly induced by the direct interaction with photogenerated holes trapped at the surface of photocatalyst; instead, the C-H activation is significantly promoted by the photoactivated interfacial water species. The interfacial water hydrates and properly stabilizes hydrocarbon radical intermediates, thereby suppressing their overstabilization. Owing to these water-assisted effects, the photocatalytic conversion rates of methane under wet conditions are dramatically improved by typically more than 30 times at ambient temperatures (~300 K) and pressures (~1 atm) in comparison to those under dry conditions. This study sheds new light on the role of interfacial water and provides a firm basis for design strategies for non-thermal heterogeneous catalysis of methane under ambient conditions.
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Affiliation(s)
- Hiromasa Sato
- grid.467196.b0000 0001 2285 6123Department of Materials Molecular Science, Institute for Molecular Science, Okazaki, Aichi 444-8585 Japan ,grid.275033.00000 0004 1763 208XThe Graduate University for Advanced Studies, SOKENDAI, Hayama, Kanagawa 240-0193 Japan
| | - Atsushi Ishikawa
- grid.21941.3f0000 0001 0789 6880Center for Green Research on Energy and Environmental Materials (GREEN), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044 Japan
| | - Hikaru Saito
- grid.467196.b0000 0001 2285 6123Department of Materials Molecular Science, Institute for Molecular Science, Okazaki, Aichi 444-8585 Japan
| | - Taisuke Higashi
- grid.467196.b0000 0001 2285 6123Department of Materials Molecular Science, Institute for Molecular Science, Okazaki, Aichi 444-8585 Japan
| | - Kotaro Takeyasu
- grid.20515.330000 0001 2369 4728Faculty of Pure and Applied Sciences, Tsukuba Research Centre for Energy and Materials Science, and R&D Center for Zero CO2 Emission with Functional Materials, University of Tsukuba, Tsukuba, Ibaraki 305-8573 Japan
| | - Toshiki Sugimoto
- grid.467196.b0000 0001 2285 6123Department of Materials Molecular Science, Institute for Molecular Science, Okazaki, Aichi 444-8585 Japan ,grid.275033.00000 0004 1763 208XThe Graduate University for Advanced Studies, SOKENDAI, Hayama, Kanagawa 240-0193 Japan ,grid.419082.60000 0004 1754 9200Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Chiyoda, Tokyo 102-0076 Japan
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17
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Li H, Lin C, Yang Y, Dong C, Min Y, Shi X, Wang L, Lu S, Zhang K. Boosting Reactive Oxygen Species Generation Using Inter-Facet Edge Rich WO 3 Arrays for Photoelectrochemical Conversion. Angew Chem Int Ed Engl 2023; 62:e202210804. [PMID: 36351869 DOI: 10.1002/anie.202210804] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Indexed: 11/11/2022]
Abstract
Water oxidation reaction leaves room to be improved in the development of various solar fuel productions, because of the kinetically sluggish 4-electron transfer process of oxygen evolution reaction. In this work, we realize reactive oxygen species (ROS), H2 O2 and OH⋅, formations by water oxidation with total Faraday efficiencies of more than 90 % by using inter-facet edge (IFE) rich WO3 arrays in an electrolyte containing CO3 2- . Our results demonstrate that the IFE favors the adsorption of CO3 2- while reducing the adsorption energy of OH⋅, as well as suppresses surface hole accumulation by direct 1-electron and indirect 2-electron transfer pathways. Finally, we present selective oxidation of benzyl alcohol by in situ using the formed OH⋅, which delivers a benzaldehyde production rate of ≈768 μmol h-1 with near 100 % selectivity. This work offers a promising approach to tune or control the oxidation reaction in an aqueous solar fuel system towards high efficiency and value-added product.
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Affiliation(s)
- He Li
- School of Materials Science and Engineering and School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Cheng Lin
- School of Materials Science and Engineering and School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Yilong Yang
- School of Materials Science and Engineering and School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Chaoran Dong
- School of Materials Science and Engineering and School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Yulin Min
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai, 200090, P. R. China
| | - Xiaoqin Shi
- School of Materials Science and Engineering and School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Luyang Wang
- College of New Materials and New Energies, Shenzhen Technology University, Shenzhen, Guangdong 518118, P. R. China
| | - Siyu Lu
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, 450000, P. R. China
| | - Kan Zhang
- School of Materials Science and Engineering and School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
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18
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Li N, Cai L, Gao G, Lin Y, Wang C, Liu H, Liu Y, Duan H, Ji Q, Hu W, Tan H, Qi Z, Wang LW, Yan W. Operando Direct Observation of Stable Water-Oxidation Intermediates on Ca 2-xIrO 4 Nanocrystals for Efficient Acidic Oxygen Evolution. NANO LETTERS 2022; 22:6988-6996. [PMID: 36005477 DOI: 10.1021/acs.nanolett.2c01777] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We report Ca2-xIrO4 nanocrystals exhibit record stability of 300 h continuous operation and high iridium mass activity (248 A gIr-1 at 1.5 VRHE) that is about 62 times that of benchmark IrO2. Lattice-resolution images and surface-sensitive spectroscopies demonstrate the Ir-rich surface layer (evolved from one-dimensional connected edge-sharing [IrO6] octahedrons) with high relative content of Ir5+ sites, which is responsible for the high activity and long-term stability. Combining operando infrared spectroscopy with X-ray absorption spectroscopy, we report the first direct observation of key intermediates absorbing at 946 cm-1 (Ir6+═O site) and absorbing at 870 cm-1 (Ir6+OO- site) on iridium-based oxides electrocatalysts, and further discover the Ir6+═O and Ir6+OO- intermediates are stable even just from 1.3 VRHE. Density functional theory calculations indicate the catalytic activity of Ca2IrO4 is enhanced remarkably after surface Ca leaching, and suggest IrOO- and Ir═O intermediates can be stabilized on positive charged active sites of Ir-rich surface layer.
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Affiliation(s)
- Na Li
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
- Department of Materials Science and Engineering, National University of Singapore, 117575 Singapore
| | - Liang Cai
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Materials Science and Engineering, National University of Singapore, 117575 Singapore
| | - Guoping Gao
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic Physics, School of Physics, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Yue Lin
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Chao Wang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Hengjie Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Yuying Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Hengli Duan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Qianqian Ji
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Wei Hu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Hao Tan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Zeming Qi
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Lin-Wang Wang
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Wensheng Yan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
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19
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Frei H. Time-Resolved Vibrational and Electronic Spectroscopy for Understanding How Charges Drive Metal Oxide Catalysts for Water Oxidation. J Phys Chem Lett 2022; 13:7953-7964. [PMID: 35981106 DOI: 10.1021/acs.jpclett.2c01320] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Temporally resolved spectroscopy is a powerful approach for gaining detailed mechanistic understanding of water oxidation at robust Earth-abundant metal oxide catalysts for guiding efficiency improvement of solar fuel conversion systems. Beyond detecting and structurally identifying surface intermediates by vibrational and accompanying optical spectroscopy, knowledge of how charges, sequentially delivered to the metal oxide surface, drive the four-electron water oxidation cycle is critical for enhancing catalytic efficiency. Key issues addressed in this Perspective are the experimental requirements for establishing the kinetic relevancy of observed surface species and the discovery of the rate-boosting role of encounters of two or more one-electron surface hole charges, often in the form of randomly hopping metal oxo or oxyl moieties, for accessing very low-barrier O-O bond-forming pathways. Recent spectroscopic breakthroughs of metal oxide photo- and electrocatalysts inspire future research poised to take advantage of new highly sensitive spectroscopic tools and of methods for fast catalysis triggering.
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Affiliation(s)
- Heinz Frei
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, United States
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20
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Zhang X, Zhang S, Cui X, Zhou W, Cao W, Cheng D, Sun Y. Recent Advances in TiO2-based Photoanodes for Photoelectrochemical Water Splitting. Chem Asian J 2022; 17:e202200668. [PMID: 35925726 DOI: 10.1002/asia.202200668] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 07/31/2022] [Indexed: 11/12/2022]
Abstract
Photoelectrochemical (PEC) water splitting has attracted a great attention in the past several decades which holds great promise to address global energy and environmental issues by converting solar energy into hydrogen. However, its low solar-to-hydrogen (STH) conversion efficiency remains a bottleneck for practical application. Developing efficient photoelectrocatalysts with high stability and high STH conversion efficiency is one of the key challenges. As a typical n-type semiconductor, titanium dioxide (TiO 2 ) exhibits high PEC water splitting performance, especially high chemical and photo stability. But, TiO 2 has also disadvantages such as wide band gap and fast electron-hole recombination rate, which seriously hinder its PEC performance. This review focuses on recent development in TiO 2 -based photoanodes as well as some key fundamentals. The corresponding mechanisms and key factors for high STH, and controllable synthesis and modification strategies are highlighted in this review. We conclude finally with an outlook providing a critical perspective on future trends on TiO 2 -based photoanodes for PEC water splitting.
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Affiliation(s)
- Xiaoyan Zhang
- Shanghai University, Department of chemistry, No. 99, Road Shangda, 200444, Shanghai, CHINA
| | | | - Xiaoli Cui
- Fudan University, Department of Materials Science, CHINA
| | - Wei Zhou
- Shanghai University, Department of Chemistry, CHINA
| | - Weimin Cao
- Shanghai University, Department of Chemistry, CHINA
| | | | - Yi Sun
- Shanghai Aerospace Hydrogen Energy Technology Co. Ltd, Department of R & D, CHINA
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21
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Ngo HM, Pawar AU, Tang J, Zhuo Z, Lee DK, Ok KM, Kang YS. Synthesis of Uniform Size Rutile TiO2 Microrods by Simple Molten-Salt Method and Its Photoluminescence Activity. NANOMATERIALS 2022; 12:nano12152626. [PMID: 35957057 PMCID: PMC9370513 DOI: 10.3390/nano12152626] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/19/2022] [Accepted: 07/26/2022] [Indexed: 02/01/2023]
Abstract
Uniform-size rutile TiO2 microrods were synthesized by simple molten-salt method with sodium chloride as reacting medium and different kinds of sodium phosphate salts as growth control additives to control the one-dimensional (1-D) crystal growth of particles. The effect of rutile and anatase ratios as a precursor was monitored for rod growth formation. Apart from uniform rod growth study, optical properties of rutile microrods were observed by UV−visible and photoluminescence (PL) spectroscopy. TiO2 materials with anatase and rutile phase show PL emission due to self-trapped exciton. It has been observed that synthesized rutile TiO2 rods show various PL emission peaks in the range of 400 to 900 nm for 355 nm excitation wavelengths. All PL emission appeared due to the oxygen vacancy present inside rutile TiO2 rods. The observed PL near the IR range (785 and 825 nm) was due to the formation of a self-trapped hole near to the surface of (110) which is the preferred orientation plane of synthesized rutile TiO2 microrods.
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Affiliation(s)
- Hieu Minh Ngo
- Department of Chemistry, Sogang University, Seoul 04107, Korea; (H.M.N.); (K.M.O.)
| | - Amol Uttam Pawar
- Environmental and Climate Technology, Korea Institute of Energy Technology, Naju-si 58219, Korea; (A.U.P.); (D.K.L.)
| | - Jun Tang
- Zhejiang Coloray Technology Development Co., Ltd., No. 151, Huishan Road, Deqing County, Huzhou 313200, China; (J.T.); (Z.Z.)
| | - Zhongbiao Zhuo
- Zhejiang Coloray Technology Development Co., Ltd., No. 151, Huishan Road, Deqing County, Huzhou 313200, China; (J.T.); (Z.Z.)
| | - Don Keun Lee
- Environmental and Climate Technology, Korea Institute of Energy Technology, Naju-si 58219, Korea; (A.U.P.); (D.K.L.)
| | - Kang Min Ok
- Department of Chemistry, Sogang University, Seoul 04107, Korea; (H.M.N.); (K.M.O.)
| | - Young Soo Kang
- Environmental and Climate Technology, Korea Institute of Energy Technology, Naju-si 58219, Korea; (A.U.P.); (D.K.L.)
- Correspondence:
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22
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Tayyebi E, Höskuldsson ÁB, Wark A, Atrak N, Comer BM, Medford AJ, Skúlason E. Perspectives on the Competition between the Electrochemical Water and N 2 Oxidation on a TiO 2(110) Electrode. J Phys Chem Lett 2022; 13:6123-6129. [PMID: 35759374 DOI: 10.1021/acs.jpclett.2c00769] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The electrochemical nitrogen oxidation reaction (NOR) has recently drawn attention due to promising experimental and theoretical results. It provides an alternative, environmentally friendly route to directly synthesize nitrate from N2(g). There is to date a limited number of investigations focused on the electrochemical NOR. Herein, we present a detailed computational study on the kinetics of both the NOR and the competing oxygen evolution reaction (OER) on the TiO2(110) electrode under ambient conditions. The use of grand canonical density functional theory in combination with the linearized Poisson-Boltzmann equation allows a continuous tuning of the explicitly applied electrical potential. We find that the OER may either promote or suppress the NOR on TiO2(110) depending on reaction conditions. The detailed atomistic insights provided on the mechanisms of these competing processes make possible further developments toward a direct electrochemical NOR process.
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Affiliation(s)
- Ebrahim Tayyebi
- Science Institute, University of Iceland, VR-III, 107 Reykjavík, Iceland
| | | | - André Wark
- Science Institute, University of Iceland, VR-III, 107 Reykjavík, Iceland
| | - Narges Atrak
- Science Institute, University of Iceland, VR-III, 107 Reykjavík, Iceland
| | - Benjamin M Comer
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30318, United States
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Andrew James Medford
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30318, United States
| | - Egill Skúlason
- Science Institute, University of Iceland, VR-III, 107 Reykjavík, Iceland
- Faculty of Industrial Engineering, Mechanical Engineering and Computer Science, University of Iceland, VR-III, 107 Reykjavík, Iceland
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23
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Zhao D, Qiao Q, Su T, Gao H, Len C, Luque R, Yang Z. Insights into bimetallic synergistic effect towards γ-valerolactone production under Co doped Zr-TiO2. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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24
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Gao P, Zhang L, Fu C, Tian Y, Li X, Li X, Yang J. Promoting Water Activation by Photogenerated Holes in Monolayer C 2N. J Phys Chem Lett 2022; 13:3332-3337. [PMID: 35394781 DOI: 10.1021/acs.jpclett.2c00765] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In photocatalytic reactions, the activation of H2O is very important for achieving high energy conversion efficiency. However, its activation mechanism under photoirradiation is still not fully understood. Here, on the basis of first-principles calculations, the role of photogenerated holes on the activation of H2O is investigated in a typical photocatalytic material C2N. The H2O molecule adsorbs at the six-membered N pore of C2N with a dual H-bonding configuration. Due to the electrostatic repulsion between the O atom of H2O and six N atoms of C2N, the energy level of the H2O molecule's highest occupied molecular orbital is raised significantly to exceed the valence band maximum of C2N, so that the photogenerated holes in C2N can be quickly captured by the H2O molecule. The captured photogenerated holes boost the activation of H2O and reduce the dissociation energy barrier from 1.61 to 0.69 eV. Besides, p-type defects of C2N have similar effects as photogenerated holes.
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Affiliation(s)
- Pengfei Gao
- Interdisciplinary Center for Fundamental and Frontier Sciences, Nanjing University of Science and Technology, Jiangyin, Jiangsu 214443, China
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Lili Zhang
- Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
| | - Cenfeng Fu
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yunzhe Tian
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xiangyang Li
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xingxing Li
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jinlong Yang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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25
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Lin Y, Yu L, Tang L, Song F, Schlögl R, Heumann S. In Situ Identification and Time-Resolved Observation of the Interfacial State and Reactive Intermediates on a Cobalt Oxide Nanocatalyst for the Oxygen Evolution Reaction. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yangming Lin
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 P. R. China
- Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen 361021, China
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Linhui Yu
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Ling Tang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 P. R. China
- Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen 361021, China
| | - Feihong Song
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Robert Schlögl
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - Saskia Heumann
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
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26
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Xiaoning W, Haowen C, Kang W, Xitao W. Insights into thermally assisted photocatalytic overall water splitting over ZnTi-LDH in a gas–solid reaction system. Catal Sci Technol 2022. [DOI: 10.1039/d2cy01175a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
H2O2 and bridge hydroxyl groups form because of water splitting. This process occurs intensely with the addition of heat, resulting in generation of more intermediates. Meanwhile, the separation of electrons and holes is accelerated by the heat.
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Affiliation(s)
- Wang Xiaoning
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Chen Haowen
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Wang Kang
- Tianjin Key Laboratory of Membrane Science and Desalination Technology, Chemical Engineering Research Center, College of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Wang Xitao
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
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27
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Vasudevan S, Srinivasan P, Neelakantan P, Rayappan JBB, Solomon AP. Photoluminescence-Based Bioassay With Cysteamine-Capped TiO 2 Nanoparticles for the Selective Recognition of N-Acyl Homoserine Lactones. Front Bioeng Biotechnol 2021; 9:750933. [PMID: 34926417 PMCID: PMC8678280 DOI: 10.3389/fbioe.2021.750933] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 11/08/2021] [Indexed: 11/13/2022] Open
Abstract
Currently available diagnostic procedures for infections are laborious and time-consuming, resulting in a substantial financial burden by increasing morbidity, increased costs of hospitalization, and mortality. Therefore, innovative approaches to design diagnostic biomarkers are imperative to assist in the rapid and sensitive diagnosis of microbial infections. Acyl homoserine lactones (AHLs) are ubiquitous bacterial signaling molecules that are found to be significantly upregulated in infected sites. In this pioneering work, we have developed a simple photoluminescence-based assay using cysteamine-capped titanium oxide (TiO2) nanoparticles for AHL detection. The PL intensity variation of the oxygen defect state of TiO2 was used for the biosensing measurements. The bioassays were validated using two well-studied AHL molecules (C4-HSL and 3-oxo-C12 HSL) of an important human pathogen, Pseudomonas aeruginosa. The developed system has a maximum relative response of 98%. Furthermore, the efficacy of the system in simulated host urine using an artificial urine medium showed a linear detection range of 10-160 nM. Also, we confirmed the relative response and specificity of the system in detecting AHLs produced by P. aeruginosa in a temporal manner.
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Affiliation(s)
- Sahana Vasudevan
- Quorum Sensing Laboratory, Centre for Research in Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, India
| | - Parthasarathy Srinivasan
- Nanosensors Laboratory, School of Electrical & Electronics Engineering, Centre for Nanotechnology & Advanced Biomaterials (CeNTAB), SASTRA Deemed University, Thanjavur, India
- Department of Electronics and Communication Engineering, Amrita School of Engineering, AMRITA Vishwa Vidyapeetham Chennai Campus, Chennai, India
| | - Prasanna Neelakantan
- Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong KongSAR, China
| | - John Bosco Balaguru Rayappan
- Nanosensors Laboratory, School of Electrical & Electronics Engineering, Centre for Nanotechnology & Advanced Biomaterials (CeNTAB), SASTRA Deemed University, Thanjavur, India
| | - Adline Princy Solomon
- Quorum Sensing Laboratory, Centre for Research in Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, India
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28
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Venugopal A, Kas R, Hau K, Smith WA. Operando Infrared Spectroscopy Reveals the Dynamic Nature of Semiconductor-Electrolyte Interface in Multinary Metal Oxide Photoelectrodes. J Am Chem Soc 2021; 143:18581-18591. [PMID: 34726398 PMCID: PMC8587602 DOI: 10.1021/jacs.1c08245] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Detailed knowledge about the semiconductor/electrolyte interface in photoelectrochemical (PEC) systems has been lacking because of the inherent difficulty of studying such interfaces, especially during operation. Current understandings of these interfaces are mostly from the extrapolation of ex situ data or from modeling approaches. Hence, there is a need for operando techniques to study such interfaces to develop a better understanding of PEC systems. Here, we use operando photoelectrochemical attenuated total reflection Fourier transform infrared (PEC-ATR-FTIR) spectroscopy to study the metal oxide/electrolyte interface, choosing BiVO4 as a model photoanode. We demonstrate that preferential dissolution of vanadium occurs from the BiVO4/water interface, upon illumination in open-circuit conditions, while both bismuth and vanadium dissolution occurs when an anodic potential is applied under illumination. This dynamic dissolution alters the surface Bi:V ratio over time, which subsequently alters the band bending in the space charge region. This further impacts the overall PEC performance of the photoelectrode, at a time scale very relevant for most lab-scale studies, and therefore has serious implications on the performance analysis and fundamental studies performed on this and other similar photoelectrodes.
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Affiliation(s)
- Anirudh Venugopal
- Materials for Energy Conversion and Storage (MECS), Department of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology, Delft, 2629HZ, The Netherlands
| | - Recep Kas
- Renewable and Sustainable Energy Institute (RASEI), University of Colorado Boulder, Boulder, Colorado 80303, United States
| | - Kayeu Hau
- Materials for Energy Conversion and Storage (MECS), Department of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology, Delft, 2629HZ, The Netherlands
| | - Wilson A Smith
- Materials for Energy Conversion and Storage (MECS), Department of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology, Delft, 2629HZ, The Netherlands.,Renewable and Sustainable Energy Institute (RASEI), University of Colorado Boulder, Boulder, Colorado 80303, United States
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29
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Arabameri M, Bashiri H. Introduction of the Effective Photon Concentration Variable for Studying the Mechanism of Crystal Violet Photodegradation. Photochem Photobiol 2021; 98:798-814. [PMID: 34664274 DOI: 10.1111/php.13543] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 09/19/2021] [Accepted: 10/15/2021] [Indexed: 12/30/2022]
Abstract
In this work, we have proposed a new approach to study the mechanism of crystal violet (CV) photodegradation on TiO2 surface using kinetic Monte Carlo simulation. The TiO2 surface was considered as a set of reactive centers, which is essential in dye photodegradation. A new variable "the effective photon concentration" (Ieff ) is defined. A detailed chemical understanding of the photocatalytic reaction is provided. This approach provides a simple and effective method to find the optimal conditions of the studied system. This goal was achieved by investigating the effects of some operational parameters, including initial concentration of CV, pH, loading TiO2 , light intensity and volume, on the degradation percent, and also, on the effective photon concentration. The perfect agreements between the experimental and simulated data at different conditions confirmed the proposed approach for describing the CV photodestruction. Also, the simulation results indicated that: (1) a significant fraction of the scattered UV irradiation into the reaction vessel does not lead to charge carrier generation; (2) the generation and recombination of charge carriers have crucial roles in the photodegradation. This is the first time that a method based on the reactive centers is employed to investigate the dye degradation by a photocatalyst.
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Affiliation(s)
- Mojtaba Arabameri
- Department of Physical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, Iran
| | - Hadis Bashiri
- Department of Physical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, Iran
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30
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Kosaka T, Ando T, Hisatomi T, Nishiyama H, Zhou Y, Domen K, Takahashi Y, Onishi H. Microelectrode-based transient amperometry of O 2 adsorption and desorption on a SrTiO 3 photocatalyst excited under water. Phys Chem Chem Phys 2021; 23:19386-19393. [PMID: 34473157 DOI: 10.1039/d1cp03264j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Oxygen evolution at water-solid interfaces is a key reaction for sustainable energy production. Although some intermediate states have been detected in transient absorption spectroscopy, the O2 evolution kinetics after the multi-step, four-electron oxidation of water remain unknown. In this study, transient amperometry with a microelectrode was applied to operando O2 detection over Al-doped SrTiO3 particles doubly loaded with RhCrOx and CoOy cocatalysts, an efficient photocatalyst for the overall water-splitting reaction. Electrochemical O2 detection at intervals of 0.1 s unexpectedly indicated instantaneous O2 adsorption and desorption in addition to steady, photocatalytic O2 evolution on the photocatalyst modified under intense light irradiation. We hypothesized that electrons excited in the conduction band were transferred to O2 in water thorough Ti cations neighboring an oxygen anion vacancy on the modified Al-doped SrTiO3. The negatively charged O2 was then bound to the Ti cations. It was neutralized and released when shaded through electron back-transfer to the conduction band. The hypothesized mechanism for O2 adsorption and desorption was compared with the photoinduced O2 desorption known to occur on anion vacancies of TiO2(110). The microelectrode-based transient amperometry demonstrated in this paper will be applied to many other phenomena at liquid-solid interfaces.
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Affiliation(s)
- Takumu Kosaka
- Department of Chemistry, School of Science, Kobe University, Kobe 657-8501, Japan.
| | - Tomohiro Ando
- Division of Electrical Engineering and Computer Science, Kanazawa University, Kanazawa 920-1192, Japan
| | - Takashi Hisatomi
- Research Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, Nagano 380-8553, Japan.,Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency, Saitama 332-0012, Japan
| | - Hiroshi Nishiyama
- Office of University Professors, The University of Tokyo, Tokyo 113-8656, Japan
| | - Yuanshu Zhou
- Nano Life Science Institute, Kanazawa University, Kanazawa 920-1192, Japan
| | - Kazunari Domen
- Research Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, Nagano 380-8553, Japan.,Office of University Professors, The University of Tokyo, Tokyo 113-8656, Japan
| | - Yasufumi Takahashi
- Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency, Saitama 332-0012, Japan.,Nano Life Science Institute, Kanazawa University, Kanazawa 920-1192, Japan
| | - Hiroshi Onishi
- Department of Chemistry, School of Science, Kobe University, Kobe 657-8501, Japan. .,Research Center for Membrane and Film Technology, Kobe University, Kobe 657-8501, Japan
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31
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Feng N, Lin H, Song H, Yang L, Tang D, Deng F, Ye J. Efficient and selective photocatalytic CH 4 conversion to CH 3OH with O 2 by controlling overoxidation on TiO 2. Nat Commun 2021; 12:4652. [PMID: 34341354 PMCID: PMC8329221 DOI: 10.1038/s41467-021-24912-0] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 07/09/2021] [Indexed: 11/29/2022] Open
Abstract
The conversion of photocatalytic methane into methanol in high yield with selectivity remains a huge challenge due to unavoidable overoxidation. Here, the photocatalytic oxidation of CH4 into CH3OH by O2 is carried out on Ag-decorated facet-dominated TiO2. The {001}-dominated TiO2 shows a durable CH3OH yield of 4.8 mmol g−1 h−1 and a selectivity of approximately 80%, which represent much higher values than those reported in recent studies and are better than those obtained for {101}-dominated TiO2. Operando Fourier transform infrared spectroscopy, electron spin resonance, and nuclear magnetic resonance techniques are used to comprehensively clarify the underlying mechanism. The straightforward generation of oxygen vacancies on {001} by photoinduced holes plays a key role in avoiding the formation of •CH3 and •OH, which are the main factors leading to overoxidation and are generally formed on the {101} facet. The generation of oxygen vacancies on {001} results in distinct intermediates and reaction pathways (oxygen vacancy → Ti–O2• → Ti–OO–Ti and Ti–(OO) → Ti–O• pairs), thus achieving high selectivity and yield for CH4 photooxidation into CH3OH. The photocatalytic conversion of CH4 into CH3OH with high activity and selectivity must avoid product overoxidation. Here, authors minimize overoxidation by using a (001)-dominated TiO2 nanosheet to circumvent CH4 overoxidation intermediates plus reaction pathways that occur on (101) facets.
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Affiliation(s)
- Ningdong Feng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, CAS Key Laboratory of Magnetic Resonance in Biological Systems, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, China. .,International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Ibaraki, Japan.
| | - Huiwen Lin
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Ibaraki, Japan.,College of Materials Science and Technology, Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies, Nanjing University of Aeronautics and Astronautics, Nanjing, China
| | - Hui Song
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Ibaraki, Japan
| | - Longxiao Yang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, CAS Key Laboratory of Magnetic Resonance in Biological Systems, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, China
| | - Daiming Tang
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Ibaraki, Japan
| | - Feng Deng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, CAS Key Laboratory of Magnetic Resonance in Biological Systems, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, China
| | - Jinhua Ye
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Ibaraki, Japan. .,TJU-NIMS International Collaboration Laboratory, School of Material Science and Engineering, Tianjin University, Tianjin, China.
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32
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Lang C, Li J, Yang KR, Wang Y, He D, Thorne JE, Croslow S, Dong Q, Zhao Y, Prostko G, Brudvig GW, Batista VS, Waegele MM, Wang D. Observation of a potential-dependent switch of water-oxidation mechanism on Co-oxide-based catalysts. Chem 2021. [DOI: 10.1016/j.chempr.2021.03.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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33
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Chen T, Ding Q, Wang X, Feng Z, Li C. Mechanistic Studies on Photocatalytic Overall Water Splitting over Ga 2O 3-Based Photocatalysts by Operando MS-FTIR Spectroscopy. J Phys Chem Lett 2021; 12:6029-6033. [PMID: 34165306 DOI: 10.1021/acs.jpclett.1c01621] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Photocatalytic water splitting on semiconductor photocatalysts is one of the most important physichemical processes, but its surface reaction mechanisms are not fully understood. Based upon the ATR-FTIR investigations combining with the mass spectroscopy (MS) analysis, a direct hydroxyl radical formation mechanism that is different from those observed for other semiconductor photocatalysts is proposed. This study provides the insight into overall water splitting mechanism on Ga2O3-based photocatalysts at a molecular level, and it helps one to further understand the photocatalysis on semiconductor photocatalysts.
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Affiliation(s)
- Tao Chen
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian 116023, China
- School of Marine Science and Environment Engineering, Dalian Ocean University, 52 Heishijiao Street, Dalian 116023, China
| | - Qian Ding
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiuli Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian 116023, China
| | - Zhaochi Feng
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian 116023, China
| | - Can Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian 116023, China
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34
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Chen Z, Yin H, Wang C, Wang R, Peng Y, You C, Li J. New Insights on Competitive Adsorption of NO/SO 2 on TiO 2 Anatase for Photocatalytic NO Oxidation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:9285-9292. [PMID: 34130451 DOI: 10.1021/acs.est.1c01749] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Here, we investigate competitive adsorption and photocatalytic reaction over TiO2@SiO2: NO conversion efficiency decreases by 29.1%, and the adsorption capacity decreases from 0.125 to 0.095 mmol/g due to the influence of SO2. According to identification and comparative analysis of the IR signal, SO2 has little effect on the NO conversion route and intermediates (adsorbed NO → nitrite → nitrate), but accelerates the deactivation of catalysts. The electronic interaction scheme from density functional theory (DFT) confirms that surface hydroxyls create an unsaturated coordination of neighboring Ti or O atoms, which is favorable for NO/SO2 adsorption on anatase (101). In addition, the lone pair electrons of N or S atoms prefer to be delocalized and form covalent bonds with active surface-O on the (101) facet with terminal hydroxyls. However, preadsorbed SO2 could offset the increase of hydroxyls and strongly inhibit NO adsorption, which is consistent with the result performance evaluation. A possible reaction mechanism characterized by oxygen vacancies and·O2- is proposed, while the essential reason of catalyst deactivation and regeneration is theoretically analyzed based on the experimental and DFT calculation.
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Affiliation(s)
- Zhen Chen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
- Key Laboratory for Thermal Science and Power Engineering of the Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
| | - Haibo Yin
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Chizhong Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Rong Wang
- Key Laboratory for Thermal Science and Power Engineering of the Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
| | - Yue Peng
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Changfu You
- Key Laboratory for Thermal Science and Power Engineering of the Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
| | - Junhua Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
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35
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Lang SM, Zimmermann N, Bernhardt TM, Barnett RN, Yoon B, Landman U. Size, Stoichiometry, Dimensionality, and Ca Doping of Manganese Oxide-Based Water Oxidation Clusters: An Oxyl/Hydroxy Mechanism for Oxygen-Oxygen Coupling. J Phys Chem Lett 2021; 12:5248-5255. [PMID: 34048261 DOI: 10.1021/acs.jpclett.1c01299] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Gas-phase ion-trap reactivity experiments and density functional simulations reveal that water oxidation to H2O2 mediated by (calcium) manganese oxide clusters proceeds via formation of a terminal oxyl radical followed by oxyl/hydroxy O-O coupling. This mechanism is predicted to be energetically feasible for Mn2Oy+ (y = 2-4) and the binary CaMn3O4+, in agreement with the experimental observations. In contrast, the reaction does not proceed for the tetramanganese oxides Mn4Oy+ (y = 4-6) under these experimental conditions. This is attributed to the high fluxionality of the tetramanganese clusters, resulting in the instability of the terminal oxyl radical as well as an energetically unfavorable change of the spin state required for H2O2 formation. Ca doping, yielding a symmetry-broken lower-symmetry three-dimensional (3D) CaMn3O4+ cluster, results in structural stabilization of the oxyl radical configuration, accompanied by a favorable coupling between potential energy surfaces with different spin states, thus enabling the cluster-mediated water oxidation reaction and H2O2 formation.
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Affiliation(s)
- Sandra M Lang
- Institute of Surface Chemistry and Catalysis, University of Ulm, 89069 Ulm, Germany
| | - Nina Zimmermann
- Institute of Surface Chemistry and Catalysis, University of Ulm, 89069 Ulm, Germany
| | - Thorsten M Bernhardt
- Institute of Surface Chemistry and Catalysis, University of Ulm, 89069 Ulm, Germany
| | - Robert N Barnett
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430, United States
| | - Bokwon Yoon
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430, United States
| | - Uzi Landman
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430, United States
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36
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Wang R, Klein ML, Carnevale V, Borguet E. Investigations of water/oxide interfaces by molecular dynamics simulations. WIRES COMPUTATIONAL MOLECULAR SCIENCE 2021. [DOI: 10.1002/wcms.1537] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ruiyu Wang
- Department of Chemistry Temple University Philadelphia Pennsylvania USA
- Center for Complex Materials from First Principles (CCM) Temple University Philadelphia Pennsylvania USA
| | - Michael L. Klein
- Department of Chemistry Temple University Philadelphia Pennsylvania USA
- Center for Complex Materials from First Principles (CCM) Temple University Philadelphia Pennsylvania USA
- Institute for Computational Molecular Science, Temple University Philadelphia Pennsylvania USA
| | - Vincenzo Carnevale
- Institute for Computational Molecular Science, Temple University Philadelphia Pennsylvania USA
- Department of Biology Temple University Philadelphia Pennsylvania USA
| | - Eric Borguet
- Department of Chemistry Temple University Philadelphia Pennsylvania USA
- Center for Complex Materials from First Principles (CCM) Temple University Philadelphia Pennsylvania USA
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37
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Shen Y, Zhao Q, Li X, Hou Y. Comparative investigation of visible-light-induced benzene degradation on M-ferrite/hematite (M = Ca, Mg, Zn) nanospheres by in situ FTIR: Intermediates and reaction mechanism. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126501] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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38
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Teng Z, Zhang Q, Yang H, Kato K, Yang W, Lu YR, Liu S, Wang C, Yamakata A, Su C, Liu B, Ohno T. Atomically dispersed antimony on carbon nitride for the artificial photosynthesis of hydrogen peroxide. Nat Catal 2021. [DOI: 10.1038/s41929-021-00605-1] [Citation(s) in RCA: 162] [Impact Index Per Article: 54.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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39
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Günnemann C, Bahnemann DW, Robertson PKJ. Isotope Effects in Photocatalysis: An Underexplored Issue. ACS OMEGA 2021; 6:11113-11121. [PMID: 34056266 PMCID: PMC8153952 DOI: 10.1021/acsomega.1c00178] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 04/05/2021] [Indexed: 06/12/2023]
Abstract
In order to improve the performance of well-established photocatalysts and to develop new potential photocatalyst materials, an understanding of the underlying mechanisms of photocatalytic reactions is of the utmost importance. An often neglected method for studying the mechanism is the investigation of isotope effects. Although just a few studies related to isotope effects exist, it has been shown to be a powerful tool for exploring mechanisms of photocatalytic processes. Most of the reports are focused on TiO2, which is the most studied photocatalyst, while there is a lack of data for other photocatalyst materials. This mini-review represents an overview of research utilizing isotope effects in the area of photocatalysis. The benefits and the importance of these studies will be highlighted, and the potential for these processes to be applied for the study of further photocatalytic reactions and different photocatalyst materials will be shown.
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Affiliation(s)
- Carsten Günnemann
- Institut
für Technische Chemie, Leibniz Universität
Hannover, Callinstraße 3, D-30167 Hannover, Germany
| | - Detlef W. Bahnemann
- Institut
für Technische Chemie, Leibniz Universität
Hannover, Callinstraße 3, D-30167 Hannover, Germany
- Laboratory
“Photoactive Nanocomposite Materials”, Saint-Petersburg State University, Ulyanovskaya str. 1, Peterhof, Saint-Petersburg 198504, Russia
| | - Peter K. J. Robertson
- School
of Chemistry and Chemical Engineering, Queen’s
University Belfast, Stranmillis Road, Belfast BT9 5AG, U.K.
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40
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Lettieri S, Pavone M, Fioravanti A, Santamaria Amato L, Maddalena P. Charge Carrier Processes and Optical Properties in TiO 2 and TiO 2-Based Heterojunction Photocatalysts: A Review. MATERIALS 2021; 14:ma14071645. [PMID: 33801646 PMCID: PMC8036967 DOI: 10.3390/ma14071645] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 03/19/2021] [Accepted: 03/23/2021] [Indexed: 02/07/2023]
Abstract
Photocatalysis based technologies have a key role in addressing important challenges of the ecological transition, such as environment remediation and conversion of renewable energies. Photocatalysts can in fact be used in hydrogen (H2) production (e.g., via water splitting or photo-reforming of organic substrates), CO2 reduction, pollution mitigation and water or air remediation via oxidation (photodegradation) of pollutants. Titanium dioxide (TiO2) is a “benchmark” photocatalyst, thanks to many favorable characteristics. We here review the basic knowledge on the charge carrier processes that define the optical and photophysical properties of intrinsic TiO2. We describe the main characteristics and advantages of TiO2 as photocatalyst, followed by a summary of historical facts about its application. Next, the dynamics of photogenerated electrons and holes is reviewed, including energy levels and trapping states, charge separation and charge recombination. A section on optical absorption and optical properties follows, including a discussion on TiO2 photoluminescence and on the effect of molecular oxygen (O2) on radiative recombination. We next summarize the elementary photocatalytic processes in aqueous solution, including the photogeneration of reactive oxygen species (ROS) and the hydrogen evolution reaction. We pinpoint the TiO2 limitations and possible ways to overcome them by discussing some of the “hottest” research trends toward solar hydrogen production, which are classified in two categories: (1) approaches based on the use of engineered TiO2 without any cocatalysts. Discussed topics are highly-reduced “black TiO2”, grey and colored TiO2, surface-engineered anatase nanocrystals; (2) strategies based on heterojunction photocatalysts, where TiO2 is electronically coupled with a different material acting as cocatalyst or as sensitizer. Examples discussed include TiO2 composites or heterostructures with metals (e.g., Pt-TiO2, Au-TiO2), with other metal oxides (e.g., Cu2O, NiO, etc.), direct Z-scheme heterojunctions with g-C3N4 (graphitic carbon nitride) and dye-sensitized TiO2.
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Affiliation(s)
- Stefano Lettieri
- Institute of Applied Sciences and Intelligent Systems “E. Caianiello”, Consiglio Nazionale delle Ricerche (CNR-ISASI), Complesso Universitario di Monte S. Angelo, Via Cupa Cintia 21, 80126 Napoli, Italy
- Correspondence: ; Tel.: +39-081676809
| | - Michele Pavone
- Department of Chemical Sciences, University of Naples “Federico II”, Complesso Universitario di Monte S. Angelo, Via Cupa Cintia 21, 80126 Napoli, Italy;
| | - Ambra Fioravanti
- Institute of Science and Technology for Sustainable Energy and Mobility, Consiglio Nazionale delle Ricerche (CNR-STEMS), Via Canal Bianco 28, 44124 Ferrara, Italy;
| | | | - Pasqualino Maddalena
- Department of Physics “E. Pancini”, University of Naples “Federico II”, Complesso Universitario di Monte S. Angelo, Via Cupa Cintia 21, 80126 Napoli, Italy;
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41
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Wang L, Liu J, Wang H, Cheng H, Wu X, Zhang Q, Xu H. Forming electron traps deactivates self-assembled crystalline organic nanosheets toward photocatalytic overall water splitting. Sci Bull (Beijing) 2021; 66:265-274. [PMID: 36654332 DOI: 10.1016/j.scib.2020.08.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 07/16/2020] [Accepted: 07/22/2020] [Indexed: 01/20/2023]
Abstract
Most biological photoredox reactions occur in sophisticated molecular assemblies consisting of highly organized light-harvesting moieties and catalytic centers. Mimicking these prototypes by creating supramolecular assemblies could be a potentially viable approach toward artificial photosynthesis. Although self-assembled organic materials are known to carry out water splitting reactions, developing self-assembled organic materials for photocatalytic overall water splitting still remains a critical challenge. Herein, we first demonstrate that crystalline organic nanosheets assembled from linear oligo(phenylene butadiynylene) (OPB) are able to catalyze overall water splitting under visible light irradiation. Further investigations reveal that the photocatalytic activity of self-assembled organic structures is closely related to the crystalline structure along with the corresponding electronic structure. Structural disorders in OPB nanosheets and extrinsic factors such as adsorbed water molecules will induce the formation of electron traps which can make the OPB nanosheets thermodynamically unfavorable for photocatalytic overall water splitting. The deactivation mechanism unveiled in this study provides crucial insights into the assembling of artificial organic materials for future solar-to-chemical energy conversion.
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Affiliation(s)
- Lei Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Jia Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, Synergetic Innovation Center of Quantum Information and Quantum Physics, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Haiyun Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, and CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230026, China
| | - Hao Cheng
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Xiaojun Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, and CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230026, China.
| | - Qun Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Synergetic Innovation Center of Quantum Information and Quantum Physics, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China.
| | - Hangxun Xu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
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42
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Li J, Triana CA, Wan W, Adiyeri Saseendran DP, Zhao Y, Balaghi SE, Heidari S, Patzke GR. Molecular and heterogeneous water oxidation catalysts: recent progress and joint perspectives. Chem Soc Rev 2021; 50:2444-2485. [DOI: 10.1039/d0cs00978d] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The recent synthetic and mechanistic progress in molecular and heterogeneous water oxidation catalysts highlights the new, overarching strategies for knowledge transfer and unifying design concepts.
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Affiliation(s)
- J. Li
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
| | - C. A. Triana
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
| | - W. Wan
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
| | | | - Y. Zhao
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
| | - S. E. Balaghi
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
| | - S. Heidari
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
| | - G. R. Patzke
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
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43
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Naniwa S, Yamamoto A, Yoshida H. Visible light-induced Minisci reaction through photoexcitation of surface Ti-peroxo species. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00248a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Visible-light induced Minisci-type functionalization of pyridine with tetrahydrofuran proceeds through photoexcitation of surface Ti-peroxo species on TiO2.
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Affiliation(s)
- Shimpei Naniwa
- Graduate School of Human and Environmental Studies
- Kyoto University
- Kyoto 606-8501
- Japan
| | - Akira Yamamoto
- Graduate School of Human and Environmental Studies
- Kyoto University
- Kyoto 606-8501
- Japan
- Elements Strategy Initiative for Catalysts & Batteries (ESICB)
| | - Hisao Yoshida
- Graduate School of Human and Environmental Studies
- Kyoto University
- Kyoto 606-8501
- Japan
- Elements Strategy Initiative for Catalysts & Batteries (ESICB)
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44
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Ohno A, Watanabe H, Matsui T, Somekawa S, Tomisaki M, Einaga Y, Oaki Y, Imai H. Efficient photocatalytic conversion of benzene to phenol on stabilized subnanometer WO 3 quantum dots. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01310f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Subnanometer WO3 quantum dots are spontaneously produced in a mesoporous silica matrix. Efficient photocatalytic conversion of benzene to phenol without decomposition of the product is realized by band engineering with a strong quantum size effect.
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Affiliation(s)
- Akihide Ohno
- School of Integrated Design Engineering, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Hiroto Watanabe
- School of Integrated Design Engineering, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
- Tokyo Metropolitan Industrial Technology Research Institute, 2-4-10 Aomi. Koto-ku, Tokyo 135-0064, Japan
| | - Takahiro Matsui
- School of Integrated Design Engineering, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Shoichi Somekawa
- Tokyo Metropolitan Industrial Technology Research Institute, 2-4-10 Aomi. Koto-ku, Tokyo 135-0064, Japan
| | - Mai Tomisaki
- School of Integrated Design Engineering, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Yasuaki Einaga
- School of Integrated Design Engineering, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Yuya Oaki
- School of Integrated Design Engineering, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Hiroaki Imai
- School of Integrated Design Engineering, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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45
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Chen Z, Peng Y, Chen J, Wang C, Yin H, Wang H, You C, Li J. Performance and Mechanism of Photocatalytic Toluene Degradation and Catalyst Regeneration by Thermal/UV Treatment. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:14465-14473. [PMID: 33119280 DOI: 10.1021/acs.est.0c06048] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This work presents a new strategy for industrial flue gas purification with TiO2-based photocatalysis technology, which could be achieved by a novel dual-stage circulating photocatalytic reactor. A lab-scale fixed bed reactor is utilized to investigate the performance of photocatalytic toluene degradation and inactive catalyst regeneration by thermal/UV treatment. The relationships between operational conditions and toluene oxidation are surveyed and discussed in detail. The results show that the intermediates could be further removed and decomposed by introducing UV radiation, compared with heat treatment alone. To reveal the photocatalytic mechanism and identify the accumulated intermediates over anatase TiO2, the adsorbed toluene and aromatic intermediates are identified by XPS, in situ DRIFTS, and on-line MS. The aromatic ring and other covalent bonds (C═O, C-O, and O-H) are detected during photocatalytic oxidation. The reaction pathway involving hydrogen abstraction is referred as the dominant pathway for toluene degradation, and ring opening via ·OH radicals is crucial to make aromatic intermediates change into CO2 and H2O. The results indicate that benzoic acid and benzaldehyde are the main accumulation because of their high reaction energy. A possible reaction mechanism is proposed for toluene oxidation, deactivation, and regeneration of catalysts, which has a significant value for guiding the practical applications.
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Affiliation(s)
- Zhen Chen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
- Key Laboratory for Thermal Science and Power Engineering of the Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
| | - Yue Peng
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Jianjun Chen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Chizhong Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Haibo Yin
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Haiming Wang
- Key Laboratory for Thermal Science and Power Engineering of the Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
| | - Changfu You
- Key Laboratory for Thermal Science and Power Engineering of the Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
| | - Junhua Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
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46
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Kosaka T, Teduka Y, Ogura T, Zhou Y, Hisatomi T, Nishiyama H, Domen K, Takahashi Y, Onishi H. Transient Kinetics of O2 Evolution in Photocatalytic Water-Splitting Reaction. ACS Catal 2020. [DOI: 10.1021/acscatal.0c04115] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Takumu Kosaka
- Department of Chemistry, School of Science, Kobe University, Kobe 657-8501, Japan
| | - Yuya Teduka
- Department of Chemistry, School of Science, Kobe University, Kobe 657-8501, Japan
| | - Takuya Ogura
- Department of Chemistry, School of Science, Kobe University, Kobe 657-8501, Japan
| | - Yuanshu Zhou
- Nano Life Science Institute, Kanazawa University, Kanazawa 920-1192, Japan
| | - Takashi Hisatomi
- Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, Nagano 380-8553, Japan
| | - Hiroshi Nishiyama
- Office of University Professors, The University of Tokyo, Tokyo 113-8656, Japan
| | - Kazunari Domen
- Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, Nagano 380-8553, Japan
- Office of University Professors, The University of Tokyo, Tokyo 113-8656, Japan
| | - Yasufumi Takahashi
- Nano Life Science Institute, Kanazawa University, Kanazawa 920-1192, Japan
- Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency, Saitama 332-0012, Japan
| | - Hiroshi Onishi
- Department of Chemistry, School of Science, Kobe University, Kobe 657-8501, Japan
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47
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Absalan Y, Gholizadeh M, Butusov L, Bratchikova I, Kopylov V, Kovalchukova O. Titania nanotubes (TNTs) prepared through the complex compound of gallic acid with titanium; examining photocatalytic degradation of the obtained TNTs. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.02.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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48
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Ketwong P, Yoshihara S, Takeuchi S, Takashima M, Ohtani B. Light intensity-dependence studies on the role of surface deposits for titania-photocatalyzed oxygen evolution: Are they really cocatalysts? J Chem Phys 2020; 153:124709. [DOI: 10.1063/5.0014913] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Pradudnet Ketwong
- Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan
| | - Shun Yoshihara
- Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Shugo Takeuchi
- Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Mai Takashima
- Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan
- Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Bunsho Ohtani
- Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan
- Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0810, Japan
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49
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Han F, Zhu L, Huang Z, Zhou Z. Photoinduced Superhydrophilicity of Anatase TiO 2 Surface Uncovered by First-Principles Molecular Dynamics. J Phys Chem Lett 2020; 11:7590-7594. [PMID: 32813971 DOI: 10.1021/acs.jpclett.0c02219] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
TiO2 is a prototype of photocatalyst materials. Interfacial water structure is critical to understand the chemical reactivity of TiO2. By performing first-principles molecular dynamics simulations on the TiO2(001)/water interface were performed, we found that the presence of a photogenerated hole at the interface increases the coverage of both the molecular and dissociative water adsorption by increasing the surface acidity and then shapes the layered and ordered water structure by enhancing the interfacial hydrogen bond network. The enhanced attachment of water in contact with the TiO2 surface rationalizes the increase in the intensity of the sum frequency generation spectrum under ultraviolet illumination reported in the experiment. These findings provide a novel interpretation of the electronic effect for the photoinduced hydrophilic conversion of the TiO2 surface at the atomistic level.
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Affiliation(s)
- Fengshuang Han
- Chemical Engineering and Technology, School of Water and Environment, Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an, Shaanxi 710064, China
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Liya Zhu
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Zhenxiong Huang
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Zhaohui Zhou
- Chemical Engineering and Technology, School of Water and Environment, Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an, Shaanxi 710064, China
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Yin Z, Chen X, Wang C, Guo Z, Wu X, Zhao Z, Yao Y, Luo W, Zou Z. Mildly regulated intrinsic faradaic layer at the oxide/water interface for improved photoelectrochemical performance. Chem Sci 2020; 11:6297-6304. [PMID: 32953025 PMCID: PMC7473189 DOI: 10.1039/d0sc01052a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 06/03/2020] [Indexed: 01/05/2023] Open
Abstract
Metal oxides are widely used in different fields, including photoelectrocatalysis, photocatalysis, dye-sensitized solar cells, photoinduced superhydrophilicity and so on. It is well-known that there are intrinsic hydrated layers on the surfaces of metal oxides in ambient air or the electrolyte. Generally, interface layers between metal oxides and solutions have significant effects on the performances in these applications. However, the exact roles of the intrinsic hydrated layers are still unclear. In this study, taking TiO2 and Fe2O3 as model materials, we propose a mild heat treatment to increase the hydroxyl concentration in the hydrated surface layers of the oxides, which improves their photoelectrochemical performance remarkably. Moreover, we find that the heat-regulated hydrated layer plays the role of a hole transfer mediator between oxides and the electrolyte, which can accelerate both interface charge collection and oxygen evolution reaction kinetics in acidic solution. The new insights into the intrinsic hydrated interface layer on oxides can offer guidance not only in photoelectrocatalysis, but also in the other applications mentioned above.
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Affiliation(s)
- Ziyu Yin
- Eco-materials and Renewable Energy Research Center (ERERC) , Jiangsu Key Laboratory for Nano Technology , National Laboratory of Solid State Microstructures , Department of Physics , Nanjing University , Nanjing 210093 , China
| | - Xiangtian Chen
- Eco-materials and Renewable Energy Research Center (ERERC) , Jiangsu Key Laboratory for Nano Technology , National Laboratory of Solid State Microstructures , Department of Physics , Nanjing University , Nanjing 210093 , China
| | - Cheng Wang
- Eco-materials and Renewable Energy Research Center (ERERC) , College of Engineering and Applied Sciences , Nanjing University , Nanjing 210093 , China . ;
| | - Zijing Guo
- National Laboratory of Solid State Microstructures and Department of Physics , Nanjing University , Nanjing 210093 , China
| | - Xinglong Wu
- National Laboratory of Solid State Microstructures and Department of Physics , Nanjing University , Nanjing 210093 , China
| | - Zongyan Zhao
- Faculty of Materials Science and Engineering , Kunming University of Science and Technology , Kunming 650093 , China
| | - Yingfang Yao
- Eco-materials and Renewable Energy Research Center (ERERC) , College of Engineering and Applied Sciences , Nanjing University , Nanjing 210093 , China . ;
| | - Wenjun Luo
- Eco-materials and Renewable Energy Research Center (ERERC) , College of Engineering and Applied Sciences , Nanjing University , Nanjing 210093 , China . ;
| | - Zhigang Zou
- Eco-materials and Renewable Energy Research Center (ERERC) , Jiangsu Key Laboratory for Nano Technology , National Laboratory of Solid State Microstructures , Department of Physics , Nanjing University , Nanjing 210093 , China
- Eco-materials and Renewable Energy Research Center (ERERC) , College of Engineering and Applied Sciences , Nanjing University , Nanjing 210093 , China . ;
- School of Science and Engineering , The Chinese University of Hong Kong, Shenzhen , 2001 Longxiang Blvd., Longgang District , Shenzhen 518172 , China
- Macau Institute of Systems Engineering , Macau University of Science and Technology , Macau 999078 , China
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