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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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Corson ER, Kas R, Kostecki R, Urban JJ, Smith WA, McCloskey BD, Kortlever R. In Situ ATR-SEIRAS of Carbon Dioxide Reduction at a Plasmonic Silver Cathode. J Am Chem Soc 2020; 142:11750-11762. [PMID: 32469508 DOI: 10.1021/jacs.0c01953] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Illumination of a voltage-biased plasmonic Ag cathode during CO2 reduction results in a suppression of the H2 evolution reaction while enhancing CO2 reduction. This effect has been shown to be photonic rather than thermal, but the exact plasmonic mechanism is unknown. Here, we conduct an in situ ATR-SEIRAS (attenuated total reflectance-surface-enhanced infrared absorption spectroscopy) study of a sputtered thin film Ag cathode on a Ge ATR crystal in CO2-saturated 0.1 M KHCO3 over a range of potentials under both dark and illuminated (365 nm, 125 mW cm-2) conditions to elucidate the nature of this plasmonic enhancement. We find that the onset potential of CO2 reduction to adsorbed CO on the Ag surface is -0.25 VRHE and is identical in the light and the dark. As the production of gaseous CO is detected in the light near this onset potential but is not observed in the dark until -0.5 VRHE, we conclude that the light must be assisting the desorption of CO from the surface. Furthermore, the HCO3- wavenumber and peak area increase immediately upon illumination, precluding a thermal effect. We propose that the enhanced local electric field that results from the localized surface plasmon resonance (LSPR) is strengthening the HCO3- bond, further increasing the local pH. This would account for the decrease in H2 formation and increase the CO2 reduction products in the light.
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Affiliation(s)
- Elizabeth R Corson
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Recep Kas
- Materials for Energy Conversion and Storage (MECS), Department of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology, 2629 HZ Delft, The Netherlands
| | | | | | - Wilson A Smith
- Materials for Energy Conversion and Storage (MECS), Department of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology, 2629 HZ Delft, The Netherlands
- National Renewable Energy Laboratory, Golden, Colorado 80401, United States
- Department of Chemical and Biological Engineering and Renewable and Sustainable Energy Institute (RASEI), University of Colorado Boulder, Boulder, Colorado 80303, United States
| | - Bryan D McCloskey
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Ruud Kortlever
- Department of Process & Energy, Faculty of Mechanical, Maritime & Materials Engineering, Delft University of Technology, 2628 CB Delft, The Netherlands
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Wang XM, Wu SH, Ren HT, Zhu PY, Wang C, Liu Y, Sun SW, Zhang XC, Lin YY, Meng ZH, Jia SY, Han X. Formation of hydroperoxo (-OOH) species on the surface of self-doped Bi 2.15WO 6: reactivity towards As(iii) oxidation. Phys Chem Chem Phys 2020; 22:12456-12464. [PMID: 32458845 DOI: 10.1039/d0cp00569j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bi2+xWO6 is a cost-effective and environmentally friendly photocatalyst that shows high reactivity in the oxidation of various contaminants under visible light. However, under alkaline conditions, the reactive oxidative species in the Bi2+xWO6 system are still not clear yet. In this study, it is observed that the oxidation rates of As(iii) increase with increasing pH values in the Bi2.15WO6 system. Photoluminescence and the Mott-Schottky analyses confirm that OH- promotes the separation and transfer of photogenerated electron-hole pairs over Bi2.15WO6, thus facilitating the oxidation of As(iii). Electron spin resonance spectra analysis and quenching experiments rule out contributions of •OH, O2˙-, 1O2 and superoxo species to As(iii) oxidation and indicate that surface -OOH and/or H2O2 are indeed the predominant species under alkaline conditions. The improved production of H2O2 by H-donors such as glucose and phenol, as well as the UV-vis diffuse reflectance and Raman analyses, further confirms the formation of surface -OOH on Bi2.15WO6 under alkaline conditions. In the dark, the significant higher oxidation rate of As(iii) by H2O2-Bi2.15WO6 than that by H2O2 alone reveals that surface -OOH, instead of H2O2, plays an important role in As(iii) oxidation. This study enriches our understanding of the diversity of reactive oxygen species (ROS) in the Bi2.15WO6 system and gives new insight into the mechanism involved in the oxidation of As(iii) under alkaline conditions.
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Affiliation(s)
- Xiang-Ming Wang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China
| | - Song-Hai Wu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China
| | - Hai-Tao Ren
- School of Textile Science and Engineering, Tiangong University, Tianjin, P. R. China.
| | - Peng-Yue Zhu
- School of Environmental Science and Engineering, Tianjin University, Tianjin, P. R. China
| | - Cong Wang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China
| | - Yong Liu
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, P. R. China
| | - Shi-Wei Sun
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China
| | - Xiao-Cong Zhang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China
| | - Yi-Ying Lin
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China
| | - Zi-He Meng
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China
| | - Shao-Yi Jia
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China
| | - Xu Han
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, P. R. China and Key Lab of Indoor Air Environment Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, P. R. China.
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54
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Kitamura N, Soejima T. Low-temperature One-pot Aqueous Synthesis and Application of Anatase/Rutile TiO 2 Composite Nanoparticles. CHEM LETT 2020. [DOI: 10.1246/cl.200137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Naoki Kitamura
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, 3-4-1 Kowakae, Higashi-osaka, Osaka 577-8502, Japan
| | - Tetsuro Soejima
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, 3-4-1 Kowakae, Higashi-osaka, Osaka 577-8502, Japan
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WITHDRAWN: 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.2020.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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M. Bashir S, Idriss H. The reaction of propylene to propylene-oxide on CeO2: An FTIR spectroscopy and temperature programmed desorption study. J Chem Phys 2020; 152:044712. [DOI: 10.1063/1.5140544] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Affiliation(s)
- S. M. Bashir
- Hydrogen Platform, Catalysis Department, SABIC Corporate Research and Development Center, KAUST, Thuwal 23955, Saudi Arabia
| | - H. Idriss
- Hydrogen Platform, Catalysis Department, SABIC Corporate Research and Development Center, KAUST, Thuwal 23955, Saudi Arabia
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58
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Subbotina IR, Barsukov DV. Direct evidence of the key role of UV-formed peroxide species in photocatalytic gas-solid oxidation in air on anatase TiO 2 particles. Phys Chem Chem Phys 2020; 22:2200-2211. [PMID: 31912826 DOI: 10.1039/c9cp04728j] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
IR spectroscopy was applied for the in situ investigations of surface intermediates formed on the surface of TiO2 (anatase) and ZnO under UV light illumination in air and their reactivity in the elimination of simple pollutant molecules. UV-irradiation of TiO2 (anatase) in air leads to the generation of peroxo-species with the peaks at 852 and 912 cm-1, but the bands of O2˙-ads were not detected. This is, to our knowledge, the first direct in situ IR spectroscopic detection of O2 photosorption intermediates in moist air. The formation of peroxo-species in these conditions is specific for TiO2 (anatase), whereas on ZnO the predominant species under UV light illumination in air are O2˙-ads and H2O2, desorbing into gas phase. Adsorbed water and surface hydroxyl groups contribute to the formation and stabilization of peroxo-species on TiO2 anatase during UV illumination in an oxygen atmosphere. If UV-irradiation is carried out in the environment of moist argon instead of moist air, the peroxo-species on TiO2 anatase are formed from water in a negligible quantity. Peroxo-species formed after O2 photoadsorption on TiO2 anatase in moist air have band positions similar to peroxo-species formed after photodecomposition of H2O2 (with accompanying color change of this sample from yellow to white). Direct experimental IR-spectroscopic evidence of peroxo-species reactivity as oxidative intermediates on TiO2 (anatase) in CO and ethanol vapor photooxidative processes is firstly obtained. These results confirm our early conclusion that peroxo-species formed under UV-irradiation in O2 on the hydrated surface of TiO2 (anatase) can be responsible for the surprising extreme dependence of the CO photooxidation rate on the adsorbed water coverage with the maximum at ∼0.5 ML. The ZnO sample was not active in the photooxidation of these molecules in air. It is concluded that UV formed peroxo-species are important diamagnetic oxidative intermediates in heterogeneous photochemical gas-solid oxidation processes on TiO2 (anatase).
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Affiliation(s)
- Irina Rudol'fovna Subbotina
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences Leninsky Prospect 47, Moscow 119991, Russia.
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59
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Lang X, Liang Y, Zhang J, Li L, Cao L, Zhang H. Structure and reactivity of a water-covered anatase TiO 2(001) surface. Phys Chem Chem Phys 2020; 22:1371-1380. [PMID: 31854404 DOI: 10.1039/c9cp05409j] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We systematically studied water adsorption and oxidation on the unreconstructed TiO2(001) surface using first-principles calculations. Water first adsorbs on the surface in a dissociative state and then in a molecular state, as water coverage increases. The geometric properties of all adsorption structures suggest that the dissociative water molecules can induce stress release of the (001) surface at low coverage, reducing reactivity of the surface and thus leading to molecular adsorption of water on the surface at high coverage. The adsorption energy (or the surface energy) monotonously increases (or decreases) with the increase of the coverage, which further confirms that water, irrespective of its dissociative or molecular state, can improve the stability of the (001) surface and reduce its activity. We deeply investigated the mechanism of the oxygen evolution reaction (OER) on the water-covered (001) surface. A new water-assisted OER pathway is identified on the (001) surface, which includes the sequential transfer of protons from molecular water and surface hydroxyls, and O-O coupling processes. During the OER pathway, the O-O coupling step exhibits the largest thermodynamic energy and highest energy barrier, clarifying that it is the rate-determining step in the whole pathway. Our findings provide new insights into the strong dependence of water adsorption modes on coverage for the anatase TiO2(001) surface and may explain the high oxidation activity of the TiO2(001) surface in aqueous environments typical of TiO2 photocatalysis.
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Affiliation(s)
- Xiufeng Lang
- Material Simulation and Computing Laboratory, Department of Physics, Hebei Normal University of Science & Technology, Qinhuangdao, 066004, China.
| | - Yanhong Liang
- Material Simulation and Computing Laboratory, Department of Physics, Hebei Normal University of Science & Technology, Qinhuangdao, 066004, China.
| | - Jing Zhang
- Institute of Bismuth Science & College of Science, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Lei Li
- School of Sciences/Key Laboratory of Cosmetic, China National Light Industry, Beijing Technology and Business University, Beijing, 100048, China
| | - Liqin Cao
- College of Environment and Chemical Engineering, Yanshan University, QinHuangdao, 066004, China
| | - Hongsheng Zhang
- College of Environment and Chemical Engineering, Yanshan University, QinHuangdao, 066004, China
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60
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Liu H, Frei H. Observation of O–O Bond Forming Step of Molecular Co4O4 Cubane Catalyst for Water Oxidation by Rapid-Scan FT-IR Spectroscopy. ACS Catal 2020. [DOI: 10.1021/acscatal.9b03281] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Hongfei Liu
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, United States
| | - Heinz Frei
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, United States
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Ye S, Ding C, Liu M, Wang A, Huang Q, Li C. Water Oxidation Catalysts for Artificial Photosynthesis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1902069. [PMID: 31495962 DOI: 10.1002/adma.201902069] [Citation(s) in RCA: 122] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 07/01/2019] [Indexed: 06/10/2023]
Abstract
Water oxidation is the primary reaction of both natural and artificial photosynthesis. Developing active and robust water oxidation catalysts (WOCs) is the key to constructing efficient artificial photosynthesis systems, but it is still facing enormous challenges in both fundamental and applied aspects. Here, the recent developments in molecular catalysts and heterogeneous nanoparticle catalysts are reviewed with special emphasis on biomimetic catalysts and the integration of WOCs into artificial photosystems. The highly efficient artificial photosynthesis depends largely on active WOCs integrated into light harvesting materials via rational interface engineering based on in-depth understanding of charge dynamics and the reaction mechanism.
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Affiliation(s)
- Sheng Ye
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian, 116023, China
| | - Chunmei Ding
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian, 116023, China
| | - Mingyao Liu
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian, 116023, China
| | - Aoqi Wang
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian, 116023, China
| | - Qinge Huang
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian, 116023, China
| | - Can Li
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian, 116023, China
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63
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Masood H, Toe CY, Teoh WY, Sethu V, Amal R. Machine Learning for Accelerated Discovery of Solar Photocatalysts. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02531] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Hassan Masood
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Cui Ying Toe
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Wey Yang Teoh
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Vidhyasaharan Sethu
- School of Electrical Engineering and Telecommunications, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Rose Amal
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
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64
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Abstract
Nowadays, there is increasing concern in transportation engineering about the use of techniques less harmful to the environment and also about road safety. Heterogeneous photocatalysis based on the application of semiconductor materials onto asphalt mixtures is a promising technology because it can mitigate air pollution and road accidents. The functionalized asphalt mixtures with photocatalytic capability can degrade pollutants, such as damaging gases and oil/grease adsorbed on their surface, from specific reactions triggered by sunlight photons, providing significant environmental and social benefits. In this article, a review of photocatalysis applied in asphalt mixtures is presented. The most important characteristics related to the functionalization of asphalt mixtures for photocatalytic applications and their corresponding characterization are presented, and the achieved main results are also discussed.
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65
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Qian R, Zong H, Schneider J, Zhou G, Zhao T, Li Y, Yang J, Bahnemann DW, Pan JH. Charge carrier trapping, recombination and transfer during TiO2 photocatalysis: An overview. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.10.053] [Citation(s) in RCA: 231] [Impact Index Per Article: 46.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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66
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Iyer A, Kearney K, Ertekin E. Computational Approaches to Photoelectrode Design through Molecular Functionalization for Enhanced Photoelectrochemical Water Splitting. CHEMSUSCHEM 2019; 12:1858-1871. [PMID: 30693653 DOI: 10.1002/cssc.201802514] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 12/24/2018] [Indexed: 06/09/2023]
Abstract
Photoelectrochemical water splitting is a promising carbon-free approach to produce hydrogen from water. A photoelectrochemical cell consists of a semiconductor photoelectrode in contact with an aqueous electrolyte. Its performance is sensitive to properties of the photoelectrode/electrolyte interface, which may be tuned through functionalization of the photoelectrode surface with organic molecules. This can lead to improvements in the photoelectrode's properties. This Minireview summarizes key computational investigations on using molecular functionalization to modify photoelectrode stability, barrier height, and catalytic activity. It is discussed how first-principles density functional theory, first-principles molecular dynamics, and device modeling simulations can provide predictive insights and complement experimental investigations of functionalized photoelectrodes. Challenges and future directions in the computational modeling of functionalized photoelectrode/electrolyte interfaces within the context of experimental studies are also highlighted.
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Affiliation(s)
- Ashwathi Iyer
- Department of Physics, University of Illinois at Urbana-Champaign, 1110 W Green Street, Urbana, Illinois, 61801, USA
- International Institute of Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan
- Materials Research Laboratory, University of Illinois at Urbana-Champaign, 104 South Goodwin Avenue, Urbana, Illinois, 61801, USA
| | - Kara Kearney
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, 1206 W Green Street, Urbana, Illinois, 61801, USA
- International Institute of Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan
- Materials Research Laboratory, University of Illinois at Urbana-Champaign, 104 South Goodwin Avenue, Urbana, Illinois, 61801, USA
| | - Elif Ertekin
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, 1206 W Green Street, Urbana, Illinois, 61801, USA
- International Institute of Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan
- Materials Research Laboratory, University of Illinois at Urbana-Champaign, 104 South Goodwin Avenue, Urbana, Illinois, 61801, USA
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67
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Ha H, Jin K, Park S, Lee KG, Cho KH, Seo H, Ahn HY, Lee YH, Nam KT. Highly Selective Active Chlorine Generation Electrocatalyzed by Co 3O 4 Nanoparticles: Mechanistic Investigation through in Situ Electrokinetic and Spectroscopic Analyses. J Phys Chem Lett 2019; 10:1226-1233. [PMID: 30816050 DOI: 10.1021/acs.jpclett.9b00547] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The reaction mechanism of electrochemical chloride oxidation at neutral pH is different from that at acidic pH, in which a commercial chlor-alkali process has been developed. Different proton concentrations and accelerated hydrolysis of the generated chlorine into hypochlorous acid at high pH can change the electrokinetics and stability of reaction intermediates. We have investigated a unique reaction mechanism of Co3O4 nanoparticles for chloride oxidation at neutral pH. In contrast with water oxidation, the valency of cobalt was not changed during chloride oxidation. Interestingly, a new intermediate of Co-Cl was captured spectroscopically, distinct from the reaction intermediate at acidic pH. In addition, Co3O4 nanoparticles exhibited high selectivity for active chlorine generation at neutral pH, comparable to commercially available RuO2-based catalysts. We believe that this study provides insight into designing efficient electrocatalysts for active chlorine generation at neutral pH, which can be practically applied to electrochemical water treatment coupled to hydrogen production.
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Affiliation(s)
- Heonjin Ha
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Kyoungsuk Jin
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Sunghak Park
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Kang-Gyu Lee
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Kang Hee Cho
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Hongmin Seo
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Hyo-Yong Ahn
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Yoon Ho Lee
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
| | - Ki Tae Nam
- Department of Materials Science and Engineering , Seoul National University , Seoul 08826 , Korea
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68
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Zhu S, Zhao Y, He Y, Wang D. Selectivity of H2O2 and O2 by water oxidation on metal oxide surfaces. J Chem Phys 2019; 150:041712. [DOI: 10.1063/1.5046886] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Affiliation(s)
- Shasha Zhu
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, USA
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Yanyan Zhao
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, USA
| | - Yumin He
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, USA
| | - Dunwei Wang
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, USA
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69
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Muñoz-Batista MJ, Ballari MM, Kubacka A, Alfano OM, Fernández-García M. Braiding kinetics and spectroscopy in photo-catalysis: the spectro-kinetic approach. Chem Soc Rev 2018; 48:637-682. [PMID: 30516217 DOI: 10.1039/c8cs00108a] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The combination of kinetic and spectroscopic tools has become a key scientific methodology for the understanding of catalytic behavior but its application in photocatalysis has inherent difficulties due to the nature of the energy source of the reaction. This review article provides an overview of its use by, first, presenting mechanistically derived kinetic formulations and spectroscopic data handling methods including intrinsic expressions for light and, second, highlighting representative examples of application. To do it we consider universal catalytic systems, particularly (although not exclusively) titania-based materials, and the most frequent hole and/or electron triggered reaction schemes. This review also provides a general framework to pave the way for the future progress of the spectro-kinetic approach in the photocatalysis area.
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Affiliation(s)
- Mario J Muñoz-Batista
- Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie, 2, 28049 Madrid, Spain. and Departamento de Química Orgánica, Universidad de Córdoba, Edif. Marie Curie, Ctra Nnal IV-A, Km 396, E14014, Córdoba, Spain
| | - María M Ballari
- Instituto de Desarrollo Tecnológico para la Industria Química (INTEC, UNL-CONICET), Güemes 3450, 3000, Santa Fe, Argentina.
| | - Anna Kubacka
- Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie, 2, 28049 Madrid, Spain.
| | - Orlando M Alfano
- Instituto de Desarrollo Tecnológico para la Industria Química (INTEC, UNL-CONICET), Güemes 3450, 3000, Santa Fe, Argentina.
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70
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Collado L, Reynal A, Fresno F, Barawi M, Escudero C, Perez-Dieste V, Coronado JM, Serrano DP, Durrant JR, de la Peña O'Shea VA. Unravelling the effect of charge dynamics at the plasmonic metal/semiconductor interface for CO 2 photoreduction. Nat Commun 2018; 9:4986. [PMID: 30478316 PMCID: PMC6255847 DOI: 10.1038/s41467-018-07397-2] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 10/25/2018] [Indexed: 12/17/2022] Open
Abstract
Sunlight plays a critical role in the development of emerging sustainable energy conversion and storage technologies. Light-induced CO2 reduction by artificial photosynthesis is one of the cornerstones to produce renewable fuels and environmentally friendly chemicals. Interface interactions between plasmonic metal nanoparticles and semiconductors exhibit improved photoactivities under a wide range of the solar spectrum. However, the photo-induced charge transfer processes and their influence on photocatalysis with these materials are still under debate, mainly due to the complexity of the involved routes occurring at different timescales. Here, we use a combination of advanced in situ and time-resolved spectroscopies covering different timescales, combined with theoretical calculations, to unravel the overall mechanism of photocatalytic CO2 reduction by Ag/TiO2 catalysts. Our findings provide evidence of the key factors determining the enhancement of photoactivity under ultraviolet and visible irradiation, which have important implications for the design of solar energy conversion materials.
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Affiliation(s)
- Laura Collado
- Photoactivated Processes Unit, Institute IMDEA Energy, Avda. Ramón de la Sagra 3, 28935, Madrid, Spain
- Thermochemical Processes Unit, Institute IMDEA Energy, Avda. Ramón de la Sagra 3, 28935, Madrid, Spain
| | - Anna Reynal
- Department of Chemistry and Centre for Plastic Electronics, Imperial College London, Exhibition Road, London, SW7 2AZ, United Kingdom
- School of Science, Engineering and Design, Teesside University, Borough Road, Middlesbrough, TS1 3BA, United Kingdom
| | - Fernando Fresno
- Photoactivated Processes Unit, Institute IMDEA Energy, Avda. Ramón de la Sagra 3, 28935, Madrid, Spain
| | - Mariam Barawi
- Photoactivated Processes Unit, Institute IMDEA Energy, Avda. Ramón de la Sagra 3, 28935, Madrid, Spain
| | - Carlos Escudero
- ALBA Synchrotron Light Source, Carretera BP 1413 Km. 3.3, Cerdanyola del Vallès, Spain
| | - Virginia Perez-Dieste
- ALBA Synchrotron Light Source, Carretera BP 1413 Km. 3.3, Cerdanyola del Vallès, Spain
| | - Juan M Coronado
- Thermochemical Processes Unit, Institute IMDEA Energy, Avda. Ramón de la Sagra 3, 28935, Madrid, Spain
| | - David P Serrano
- Thermochemical Processes Unit, Institute IMDEA Energy, Avda. Ramón de la Sagra 3, 28935, Madrid, Spain.
- Department of Chemical and Energy Technology, Rey Juan Carlos University, c/ Tulipán s/n, 28935, Madrid, Spain.
| | - James R Durrant
- Department of Chemistry and Centre for Plastic Electronics, Imperial College London, Exhibition Road, London, SW7 2AZ, United Kingdom.
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71
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Jin WT, Yang F, Deng L, Chen ML, Chen JF, Chen HB, Zhou ZH. Wheel-Like Icosanuclear Peroxotitanate-A Stable Water-Soluble Catalyst for Oxygen Transfer Reactions. Inorg Chem 2018; 57:14116-14122. [PMID: 30376302 DOI: 10.1021/acs.inorgchem.8b01885] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Water-soluble wheel-like icosanuclear peroxotitanate K16[Ti20(μ-O)8(HO2)8(O2)12( R, R-tart)12]·52H2O (1) chelated by tartrate has been successfully isolated. As the largest peroxotitanate reported, {Ti20} features 20 (hydro)peroxo groups with three kinds of coordination modes in μ-η1:η2, μ-η2:η2, and η2 fashions. The cluster is stable in solution and solid states. It has been tested for the catalytic oxidations of methyl phenyl sulfide and pyridine with hydrogen peroxide, respectively, which shows reversible elimination and the addition of peroxo groups. This provides a rare example of well-characterized titanium peroxide for homogeneous catalysis and mechanism research.
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Affiliation(s)
- Wan-Ting Jin
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , China
| | - Fang Yang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , China
| | - Lan Deng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , China
| | - Mao-Long Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , China
| | - Jun-Fei Chen
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering , Ningxia University , Ningxia , 750021 , China
| | - Hong-Bin Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , China
| | - Zhao-Hui Zhou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , China
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72
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Two-dimensional titanium oxide nanosheets rich in titanium vacancies as an efficient cocatalyst for photocatalytic water oxidation. J Catal 2018. [DOI: 10.1016/j.jcat.2018.09.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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73
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Avital YY, Dotan H, Klotz D, Grave DA, Tsyganok A, Gupta B, Kolusheva S, Visoly-Fisher I, Rothschild A, Yochelis A. Two-site H 2O 2 photo-oxidation on haematite photoanodes. Nat Commun 2018; 9:4060. [PMID: 30301897 PMCID: PMC6177486 DOI: 10.1038/s41467-018-06141-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 08/08/2018] [Indexed: 11/26/2022] Open
Abstract
H2O2 is a sacrificial reductant that is often used as a hole scavenger to gain insight into photoanode properties. Here we show a distinct mechanism of H2O2 photo-oxidation on haematite (α-Fe2O3) photoanodes. We found that the photocurrent voltammograms display non-monotonous behaviour upon varying the H2O2 concentration, which is not in accord with a linear surface reaction mechanism that involves a single reaction site as in Eley-Rideal reactions. We postulate a nonlinear kinetic mechanism that involves concerted interaction between adions induced by H2O2 deprotonation in the alkaline solution with adjacent intermediate species of the water photo-oxidation reaction, thereby involving two reaction sites as in Langmuir-Hinshelwood reactions. The devised kinetic model reproduces our main observations and predicts coexistence of two surface reaction paths (bi-stability) in a certain range of potentials and H2O2 concentrations. This prediction is confirmed experimentally by observing a hysteresis loop in the photocurrent voltammogram measured in the predicted coexistence range.
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Affiliation(s)
- Yotam Y Avital
- Department of Solar Energy and Environmental Physics, Swiss Institute for Dryland Environmental and Energy Research, Blaustein Institutes for Desert Research (BIDR), Ben-Gurion University of the Negev, 8499000, Midreshet Ben-Gurion, Israel
| | - Hen Dotan
- Department of Materials Science and Engineering, Technion - Israel Institute of Technology, 32000, Haifa, Israel
| | - Dino Klotz
- Department of Materials Science and Engineering, Technion - Israel Institute of Technology, 32000, Haifa, Israel
| | - Daniel A Grave
- Department of Materials Science and Engineering, Technion - Israel Institute of Technology, 32000, Haifa, Israel
| | - Anton Tsyganok
- Department of Materials Science and Engineering, Technion - Israel Institute of Technology, 32000, Haifa, Israel
| | - Bhavana Gupta
- Department of Solar Energy and Environmental Physics, Swiss Institute for Dryland Environmental and Energy Research, Blaustein Institutes for Desert Research (BIDR), Ben-Gurion University of the Negev, 8499000, Midreshet Ben-Gurion, Israel
| | - Sofia Kolusheva
- Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, 8410501, Be'er Sheva, Israel
| | - Iris Visoly-Fisher
- Department of Solar Energy and Environmental Physics, Swiss Institute for Dryland Environmental and Energy Research, Blaustein Institutes for Desert Research (BIDR), Ben-Gurion University of the Negev, 8499000, Midreshet Ben-Gurion, Israel
| | - Avner Rothschild
- Department of Materials Science and Engineering, Technion - Israel Institute of Technology, 32000, Haifa, Israel
| | - Arik Yochelis
- Department of Solar Energy and Environmental Physics, Swiss Institute for Dryland Environmental and Energy Research, Blaustein Institutes for Desert Research (BIDR), Ben-Gurion University of the Negev, 8499000, Midreshet Ben-Gurion, Israel.
- Department of Physics, Ben-Gurion University of the Negev, 8410501, Be'er Sheva, Israel.
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74
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Characterization of peroxo reaction intermediates in the water oxidation process on hematite surfaces. J Mol Model 2018; 24:284. [PMID: 30229320 DOI: 10.1007/s00894-018-3815-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 08/29/2018] [Indexed: 10/28/2022]
Abstract
We use density functional theory-based calculations to study structural, electronic, and magnetic properties of two key reaction intermediates on a hematite, [Formula: see text]-Fe2O3, photoanode during the solar-driven water splitting reaction. Both intermediates contain an oxygen atom bonded to a surface iron atom. In one case, the adsorbed oxygen also forms a peroxo bond with a lattice oxygen from hematite; in the second case no such bond is formed. Both configurations are energetically equivalent and are related to the overpotential-determining step in the oxygen evolution reaction. The calculated reaction path for the breaking of the peroxo bond shows a barrier of about 0.86 eV for the transformation between the two intermediates. We explain this high barrier with the drastically different electronic and magnetic structure, which we also analyze using maximally localized Wannier functions. Photo-generated electron holes are shown to localize preferentially close to the reaction center at the surface in both configurations. In the case of the oxo species, this localization favors subsequent electron transfer steps during the oxygen evolution cycle. In the case of the peroxo configuration, this fact together with the high barrier for breaking the oxygen-oxygen bond indicates a possible loss mechanism due to hole trapping. Graphical Abstract Calculated spin density at a hematite surface with peroxo intermediate.
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75
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Miyoshi A, Nishioka S, Maeda K. Water Splitting on Rutile TiO 2 -Based Photocatalysts. Chemistry 2018; 24:18204-18219. [PMID: 29570871 DOI: 10.1002/chem.201800799] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Indexed: 11/07/2022]
Abstract
Water splitting using a semiconductor photocatalyst with sunlight has long been viewed as a potential means of large-scale H2 production from renewable resources. Different from anatase TiO2 , rutile enables preferential water oxidation, which is useful for the construction of a Z-scheme water-splitting system. The combination of rutile TiO2 with a suitable H2 -evolution photocatalyst such as a Pt-loaded BaZrO3 -BaTaO2 N solid solution enables solar-driven water splitting into H2 and O2 . While rutile TiO2 is a wide-gap semiconductor with a bandgap of 3.0 eV, co-doping of rutile TiO2 with certain metal ions and/or nitrogen produces visible-light-driven photocatalysts, which are also useful as a component for water oxidation in visible-light-driven Z-scheme water splitting. The key to achieving highly efficient water oxidation is to maintain a charge balance of dopants in the rutile, because single doping typically produces trap states that capture photogenerated electrons and/or holes. Here we provide a concise summary of rutile TiO2 -based photocatalysts for water-splitting systems.
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Affiliation(s)
- Akinobu Miyoshi
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Shunta Nishioka
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Kazuhiko Maeda
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
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76
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77
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Gono P, Wiktor J, Ambrosio F, Pasquarello A. Surface Polarons Reducing Overpotentials in the Oxygen Evolution Reaction. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01120] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Patrick Gono
- Chaire de Simulation à l’Echelle Atomique (CSEA), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Julia Wiktor
- Chaire de Simulation à l’Echelle Atomique (CSEA), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Francesco Ambrosio
- Chaire de Simulation à l’Echelle Atomique (CSEA), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Alfredo Pasquarello
- Chaire de Simulation à l’Echelle Atomique (CSEA), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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78
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79
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Jiang CM, Segev G, Hess LH, Liu G, Zaborski G, Toma FM, Cooper JK, Sharp ID. Composition-Dependent Functionality of Copper Vanadate Photoanodes. ACS APPLIED MATERIALS & INTERFACES 2018; 10:10627-10633. [PMID: 29489326 DOI: 10.1021/acsami.8b02977] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
To understand functional roles of constituent elements in ternary metal oxide photoanodes, essential photoelectrochemical (PEC) properties are systematically analyzed on a series of copper vanadate compounds with different Cu:V elemental ratios. Homogeneous and highly continuous thin films of β-Cu2V2O7, γ-Cu3V2O8, Cu11V6O26, and Cu5V2O10 are grown via reactive co-sputtering and their performance characteristics for the light-driven oxygen evolution reaction are evaluated. All four compounds have similar bandgaps in the range of 1.83-2.03 eV, though Cu-rich phases exhibit stronger optical absorption and higher charge separation efficiencies. Transient photocurrent analysis reveals a reduction of surface catalytic activity with increasing Cu:V elemental ratio due to competitive charge recombination at Cu-related surface states. This comprehensive analysis of PEC functionalities-including photon absorption, carrier separation, and heterogeneous charge transfer-informs strategies for improving PEC activity in the copper vanadate materials system and provides insights that may aid discovery, design, and engineering of new photoelectrode materials.
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Affiliation(s)
| | | | | | | | | | | | | | - Ian D Sharp
- Walter Schottky Institut and Physik Department , Technische Universität München , Am Coulombwall 4 , 85748 Garching , Germany
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80
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Chen Z, Zhang Q, Luo Y. Experimental Identification of Ultrafast Reverse Hole Transfer at the Interface of the Photoexcited Methanol/Graphitic Carbon Nitride System. Angew Chem Int Ed Engl 2018; 57:5320-5324. [DOI: 10.1002/anie.201713102] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 02/12/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Zongwei Chen
- Hefei National Laboratory for Physical Sciences at the Microscale; Department of Chemical Physics; Synergetic Innovation Center of Quantum Information and Quantum Physics; University of Science and Technology of China; Hefei Anhui 230026 China
| | - Qun Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale; Department of Chemical Physics; Synergetic Innovation Center of Quantum Information and Quantum Physics; University of Science and Technology of China; Hefei Anhui 230026 China
| | - Yi Luo
- Hefei National Laboratory for Physical Sciences at the Microscale; Department of Chemical Physics; Synergetic Innovation Center of Quantum Information and Quantum Physics; University of Science and Technology of China; Hefei Anhui 230026 China
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81
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Chen Z, Zhang Q, Luo Y. Experimental Identification of Ultrafast Reverse Hole Transfer at the Interface of the Photoexcited Methanol/Graphitic Carbon Nitride System. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201713102] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zongwei Chen
- Hefei National Laboratory for Physical Sciences at the Microscale; Department of Chemical Physics; Synergetic Innovation Center of Quantum Information and Quantum Physics; University of Science and Technology of China; Hefei Anhui 230026 China
| | - Qun Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale; Department of Chemical Physics; Synergetic Innovation Center of Quantum Information and Quantum Physics; University of Science and Technology of China; Hefei Anhui 230026 China
| | - Yi Luo
- Hefei National Laboratory for Physical Sciences at the Microscale; Department of Chemical Physics; Synergetic Innovation Center of Quantum Information and Quantum Physics; University of Science and Technology of China; Hefei Anhui 230026 China
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82
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Leong KH, Aziz AA, Sim LC, Saravanan P, Jang M, Bahnemann D. Mechanistic insights into plasmonic photocatalysts in utilizing visible light. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2018; 9:628-648. [PMID: 29527438 PMCID: PMC5827636 DOI: 10.3762/bjnano.9.59] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 01/17/2018] [Indexed: 05/08/2023]
Abstract
The utilisation of sunlight as an abundant and renewable resource has motivated the development of sustainable photocatalysts that can collectively harvest visible light. However, the bottleneck in utilising the low energy photons has led to the discovery of plasmonic photocatalysts. The presence of noble metal on the plasmonic photocatalyst enables the harvesting of visible light through the unique characteristic features of the noble metal nanomaterials. Moreover, the formation of interfaces between noble metal particles and semiconductor materials further results in the formation of a Schottky junction. Thereby, the plasmonic characteristics have opened up a new direction in promoting an alternative path that can be of value to the society through sustainable development derived through energy available for all for diverse applications. We have comprehensively prepared this review to specifically focus on fundamental insights into plasmonic photocatalysts, various synthesis routes, together with their strengths and weaknesses, and the interaction of the plasmonic photocatalyst with pollutants as well as the role of active radical generation and identification. The review ends with a pinnacle insight into future perspectives regarding realistic applications of plasmonic photocatalysts.
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Affiliation(s)
- Kah Hon Leong
- Department of Environmental Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, 31900, Kampar, Perak, Malaysia
| | - Azrina Abd Aziz
- Faculty of Engineering Technology, Universiti Malaysia Pahang, Lebuhraya Tun Razak, Gambang, 26300 Kuantan, Pahang, Malaysia
| | - Lan Ching Sim
- Department of Environmental Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, 31900, Kampar, Perak, Malaysia
| | - Pichiah Saravanan
- Environmental Nanotechnology Laboratory, Department of Environmental Science and Engineering, Indian Institute of Technology (ISM) Dhanbad 826004, Jharkhand, India
| | - Min Jang
- Department of Environmental Engineering, Kwangwoon University, 447-1 Wolgye-Dong, Nowon-Gu, Seoul, South Korea
| | - Detlef Bahnemann
- Institut für Technische Chemie, Leibniz Universität Hannover, Callinstrasse 3, 30167 Hannover, Germany
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83
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Zhang Y, Zhang H, Liu A, Chen C, Song W, Zhao J. Rate-Limiting O–O Bond Formation Pathways for Water Oxidation on Hematite Photoanode. J Am Chem Soc 2018; 140:3264-3269. [DOI: 10.1021/jacs.7b10979] [Citation(s) in RCA: 98] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yuchao Zhang
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Hongna Zhang
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Anan Liu
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Chuncheng Chen
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Wenjing Song
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Jincai Zhao
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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84
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Hettiarachchi E, Hurab O, Rubasinghege G. Atmospheric Processing and Iron Mobilization of Ilmenite: Iron-Containing Ternary Oxide in Mineral Dust Aerosol. J Phys Chem A 2018; 122:1291-1302. [DOI: 10.1021/acs.jpca.7b11320] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Eshani Hettiarachchi
- Department of Chemistry, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801, United States
| | - Omar Hurab
- Department of Chemistry, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801, United States
| | - Gayan Rubasinghege
- Department of Chemistry, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801, United States
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85
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Ooka H, Wang Y, Yamaguchi A, Hatakeyama M, Nakamura S, Hashimoto K, Nakamura R. Legitimate intermediates of oxygen evolution on iridium oxide revealed by in situ electrochemical evanescent wave spectroscopy. Phys Chem Chem Phys 2017; 18:15199-204. [PMID: 27197557 DOI: 10.1039/c6cp02385a] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Understanding how the four-electron oxidation of water to dioxygen proceeds in different materials is critical to the rational design of efficient catalysts towards artificial photosynthetic systems. Here, using in situ electrochemical evanescent wave spectroscopy under oxygen-evolving conditions, we report two intermediates of iridium oxide (IrOx), which is the most active and stable catalyst characterized to date in acidic medium. The observed potential dependence of the two intermediates indicated that they were associated with different surface sites, and intermediate scavenging experiments using H2O2 provided insight into their role during catalysis. Notably, an Ir(V) species with an absorption maximum at 450 nm was found to mediate the initial two-electron oxidation of water. Inhibition of the Ir(V) species by H2O2, combined with computational modeling, indicates that the accumulation and concurrent spin-state change of the Ir(V) species is a prerequisite for efficient water oxidation by IrOx electrodes.
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Affiliation(s)
- Hideshi Ooka
- Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Yuanqing Wang
- Biofunctional Catalyst Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
| | - Akira Yamaguchi
- Biofunctional Catalyst Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
| | - Makoto Hatakeyama
- Computational Chemistry Applications Unit, Advanced Center for Computing and Communication, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Shinichiro Nakamura
- Computational Chemistry Applications Unit, Advanced Center for Computing and Communication, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Kazuhito Hashimoto
- Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Ryuhei Nakamura
- Biofunctional Catalyst Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
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86
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Seriani N. Ab initio simulations of water splitting on hematite. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:463002. [PMID: 29057752 DOI: 10.1088/1361-648x/aa84d9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In recent years, hematite has attracted great interest as a photocatalyst for water splitting, but many questions remain unanswered about the mechanisms and the main limiting factors. For this reason, density functional theory has been used to understand the optical, electronic and chemical properties of this material at an atomistic level. Bulk doping can be used to reduce the band gap, and to increase photoabsorption and charge mobility. Charge transport takes place through adiabatic polaron hopping. The stable (0 0 0 1) surface has a stoichiometric termination when exposed to oxygen, it becomes hydroxylated in water, and it has an oxygen-rich termination under illumination in a photoelectrochemical setup. On the oxygen-rich termination, surface states are present that might act as recombination centres for electrons and holes. On the contrary, on the hydroxylated termination surface states appear only on reaction intermediates. The intrinsic surface states disappear in the presence of an overlayer of gallium oxide. The reaction of water oxidation is assumed to proceed by four proton-coupled electron transfers and it is shown to involve a nucleophilic attack with the formation of an OOH group. Calculated overpotentials are in the range of 0.5-0.6 V. Open questions and future research directions are briefly discussed.
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Affiliation(s)
- Nicola Seriani
- The Abdus Salam ICTP, Strada Costiera 11, 34151 Trieste, Italy
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87
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Dissociative Water Adsorption on Gas-Phase Titanium Dioxide Cluster Anions Probed with Infrared Photodissociation Spectroscopy. Top Catal 2017. [DOI: 10.1007/s11244-017-0863-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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88
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Shan L, Ding J, Sun W, Han Z, Jin L. Enhanced photocatalytic activity and reaction mechanism of Ag-doped α-Bi2O3 nanosheets. INORG NANO-MET CHEM 2017. [DOI: 10.1080/24701556.2017.1357590] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Lianwei Shan
- College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin, China
| | - Jun Ding
- College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin, China
| | - Wenli Sun
- College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin, China
| | - Zhidong Han
- College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin, China
| | - Liguo Jin
- College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin, China
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89
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90
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Migani A, Blancafort L. What Controls Photocatalytic Water Oxidation on Rutile TiO2(110) under Ultra-High-Vacuum Conditions? J Am Chem Soc 2017; 139:11845-11856. [DOI: 10.1021/jacs.7b05121] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Annapaola Migani
- Departament
de Química Biològica i Modelització Molecular, IQAC-CSIC, Jordi Girona 18-26, 08034 Barcelona, Spain
- Catalan
Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Lluís Blancafort
- Institut
de Química Computacional i Catàlisi and Departament
de Química, Universitat de Girona (UDG), C/M. A. Capmany
69, 17003 Girona, Spain
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91
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Nosaka Y, Nosaka AY. Generation and Detection of Reactive Oxygen Species in Photocatalysis. Chem Rev 2017; 117:11302-11336. [DOI: 10.1021/acs.chemrev.7b00161] [Citation(s) in RCA: 1754] [Impact Index Per Article: 250.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Yoshio Nosaka
- Department of Materials Science
and Technology, Nagaoka University of Technology Nagaoka 940-2188, Japan
| | - Atsuko Y. Nosaka
- Department of Materials Science
and Technology, Nagaoka University of Technology Nagaoka 940-2188, Japan
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92
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Han B, Hang Hu Y. Investigation on H-containing shallow trap of hydrogenated TiO 2 with in situ Fourier transform infrared diffuse reflection spectroscopy. NANOTECHNOLOGY 2017; 28:304001. [PMID: 28598336 DOI: 10.1088/1361-6528/aa787c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A novel technique, high temperature high pressure in situ Fourier transform infrared diffuse reflection spectroscopy, was successfully used to investigate the formation and stability of shallow trap states in P25 TiO2 nanoparticles. Two types of shallow traps (with and without H atoms) were identified. The H-containing shallow trap can be easily generated by heating in H2 atmosphere. However, the trap is unstable in vacuum at 600 °C. In contrast, the H-free shallow trap, which can be formed by heating in vacuum, is stable even at 600 °C. The energy gaps between shallow trap states and the conduction band are 0.09 eV for H-containing shallow trap and 0.13 eV for H-free shallow trap, indicating that the H-containing shallow trap state is closer to the conduction band than that without H.
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Affiliation(s)
- Bing Han
- Department of Materials Science and Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI-49931-1295, United States of America
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93
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Maltanava HM, Poznyak SK, Andreeva DV, Quevedo MC, Bastos AC, Tedim J, Ferreira MGS, Skorb EV. Light-Induced Proton Pumping with a Semiconductor: Vision for Photoproton Lateral Separation and Robust Manipulation. ACS APPLIED MATERIALS & INTERFACES 2017; 9:24282-24289. [PMID: 28654237 DOI: 10.1021/acsami.7b05209] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Energy-transfer reactions are the key for living open systems, biological chemical networking, and the development of life-inspired nanoscale machineries. It is a challenge to find simple reliable synthetic chemical networks providing a localization of the time-dependent flux of matter. In this paper, we look to photocatalytic reaction on TiO2 from different angles, focusing on proton generation and introducing a reliable, minimal-reagent-consuming, stable inorganic light-promoted proton pump. Localized illumination was applied to a TiO2 surface in solution for reversible spatially controlled "inorganic photoproton" isometric cycling, the lateral separation of water-splitting reactions. The proton flux is pumped during the irradiation of the surface of TiO2 and dynamically maintained at the irradiated surface area in the absence of any membrane or predetermined material structure. Moreover, we spatially predetermine a transient acidic pH value on the TiO2 surface in the irradiated area with the feedback-driven generation of a base as deactivator. Importantly we describe how to effectively monitor the spatial localization of the process by the in situ scanning ion-selective electrode technique (SIET) measurements for pH and the scanning vibrating electrode technique (SVET) for local photoelectrochemical studies without additional pH-sensitive dye markers. This work shows the great potential for time- and space-resolved water-splitting reactions for following the investigation of pH-stimulated processes in open systems with their flexible localization on a surface.
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Affiliation(s)
- Hanna M Maltanava
- The Research Institute for Physical Chemical Problems, Belarusian State University , Minsk 220030, Belarus
| | - Sergey K Poznyak
- The Research Institute for Physical Chemical Problems, Belarusian State University , Minsk 220030, Belarus
| | - Daria V Andreeva
- Center for Soft and Living Matter, Institute of Basic Science Ulsan, National Institute of Science and Technology , Ulsan 44919, Republic of Korea
| | - Marcela C Quevedo
- Department of Materials and Ceramic Engineering, CICECO, University of Aveiro , Aveiro 3810-193, Portugal
| | - Alexandre C Bastos
- Department of Materials and Ceramic Engineering, CICECO, University of Aveiro , Aveiro 3810-193, Portugal
| | - João Tedim
- Department of Materials and Ceramic Engineering, CICECO, University of Aveiro , Aveiro 3810-193, Portugal
| | - Mário G S Ferreira
- Department of Materials and Ceramic Engineering, CICECO, University of Aveiro , Aveiro 3810-193, Portugal
| | - Ekaterina V Skorb
- Laboratory of Solution Chemistry of Advanced Materials and Technologies (SCAMT), ITMO University , St. Petersburg 197101, Russian Federation
- Department of Chemistry and Chemical Biology, Harvard University , 12 Oxford Street, Cambridge 02138, Massachusetts, United States
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94
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Liu F, Feng N, Wang Q, Xu J, Qi G, Wang C, Deng F. Transfer Channel of Photoinduced Holes on a TiO2 Surface As Revealed by Solid-State Nuclear Magnetic Resonance and Electron Spin Resonance Spectroscopy. J Am Chem Soc 2017; 139:10020-10028. [DOI: 10.1021/jacs.7b04877] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fen Liu
- 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, Chinese Academy of Sciences, Wuhan 430071, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - 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, Chinese Academy of Sciences, Wuhan 430071, People’s Republic of China
| | - Qiang Wang
- 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, Chinese Academy of Sciences, Wuhan 430071, People’s Republic of China
| | - Jun Xu
- 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, Chinese Academy of Sciences, Wuhan 430071, People’s Republic of China
| | - Guodong Qi
- 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, Chinese Academy of Sciences, Wuhan 430071, People’s Republic of China
| | - Chao Wang
- 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, Chinese Academy of Sciences, Wuhan 430071, People’s Republic of China
| | - 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, Chinese Academy of Sciences, Wuhan 430071, People’s Republic of China
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95
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Grulke EA, Yamamoto K, Kumagai K, Häusler I, Österle W, Ortel E, Hodoroaba VD, Brown SC, Chan C, Zheng J, Yamamoto K, Yashiki K, Song NW, Kim YH, Stefaniak AB, Schwegler-Berry D, Coleman VA, Jämting ÅK, Herrmann J, Arakawa T, Burchett WW, Lambert JW, Stromberg AJ. Size and shape distributions of primary crystallites in titania aggregates. ADV POWDER TECHNOL 2017; 28:1647-1659. [PMID: 29200658 DOI: 10.1016/j.apt.2017.03.027] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The primary crystallite size of titania powder relates to its properties in a number of applications. Transmission electron microscopy was used in this interlaboratory comparison (ILC) to measure primary crystallite size and shape distributions for a commercial aggregated titania powder. Data of four size descriptors and two shape descriptors were evaluated across nine laboratories. Data repeatability and reproducibility was evaluated by analysis of variance. One-third of the laboratory pairs had similar size descriptor data, but 83% of the pairs had similar aspect ratio data. Scale descriptor distributions were generally unimodal and were well-described by lognormal reference models. Shape descriptor distributions were multi-modal but data visualization plots demonstrated that the Weibull distribution was preferred to the normal distribution. For the equivalent circular diameter size descriptor, measurement uncertainties of the lognormal distribution scale and width parameters were 9.5% and 22%, respectively. For the aspect ratio shape descriptor, the measurement uncertainties of the Weibull distribution scale and width parameters were 7.0% and 26%, respectively. Both measurement uncertainty estimates and data visualizations should be used to analyze size and shape distributions of particles on the nanoscale.
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Affiliation(s)
- Eric A Grulke
- Chemical & Materials Engineering, University of Kentucky, Lexington, KY, USA
| | - Kazuhiro Yamamoto
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - Kazuhiro Kumagai
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - Ines Häusler
- Federal Institute for Materials Research and Testing (BAM), Berlin, Germany
| | - Werner Österle
- Federal Institute for Materials Research and Testing (BAM), Berlin, Germany
| | - Erik Ortel
- Federal Institute for Materials Research and Testing (BAM), Berlin, Germany
| | | | | | | | - Jiwen Zheng
- U.S. Food and Drug Administration, Silver Springs, MD, United States
| | | | | | - Nam Woong Song
- Korea Research Institute of Standards and Science (KRISS), Daejeon, Republic of Korea
| | - Young Heon Kim
- Korea Research Institute of Standards and Science (KRISS), Daejeon, Republic of Korea
| | - Aleksandr B Stefaniak
- U.S. National Institute for Occupational Safety and Health, Morgantown, WV, United States
| | - D Schwegler-Berry
- U.S. National Institute for Occupational Safety and Health, Morgantown, WV, United States
| | | | - Åsa K Jämting
- National Measurement Institute, Lindfield, NSW, Australia
| | - Jan Herrmann
- National Measurement Institute, Lindfield, NSW, Australia
| | | | - Woodrow W Burchett
- Applied Statistics Laboratory, University of Kentucky, Lexington, KY, USA
| | - Joshua W Lambert
- Applied Statistics Laboratory, University of Kentucky, Lexington, KY, USA
| | - Arnold J Stromberg
- Applied Statistics Laboratory, University of Kentucky, Lexington, KY, USA
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96
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Kafizas A, Ma Y, Pastor E, Pendlebury SR, Mesa C, Francàs L, Le Formal F, Noor N, Ling M, Sotelo-Vazquez C, Carmalt CJ, Parkin IP, Durrant JR. Water Oxidation Kinetics of Accumulated Holes on the Surface of a TiO2 Photoanode: A Rate Law Analysis. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01150] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Andreas Kafizas
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
| | - Yimeng Ma
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
| | - Ernest Pastor
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
| | - Stephanie R. Pendlebury
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
| | - Camilo Mesa
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
| | - Laia Francàs
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
| | - Florian Le Formal
- Laboratory
for Molecular Engineering of Optoelectronic Nanomaterials, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Nuruzzaman Noor
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Min Ling
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Carlos Sotelo-Vazquez
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Claire J. Carmalt
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Ivan P. Parkin
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - James R. Durrant
- Department
of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
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97
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Muuronen M, Parker SM, Berardo E, Le A, Zwijnenburg MA, Furche F. Mechanism of photocatalytic water oxidation on small TiO 2 nanoparticles. Chem Sci 2017; 8:2179-2183. [PMID: 28507672 PMCID: PMC5407260 DOI: 10.1039/c6sc04378j] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Accepted: 12/05/2016] [Indexed: 12/28/2022] Open
Abstract
We present the first unconstrained nonadiabatic molecular dynamics (NAMD) simulations of photocatalytic water oxidation by small hydrated TiO2 nanoparticles using Tully surface hopping and time-dependent density functional theory. The results indicate that ultrafast electron-proton transfer from physisorbed water to the photohole initiates the photo-oxidation on the S1 potential energy surface. The new mechanism readily explains the observation of mobile hydroxyl radicals in recent experiments. Two key driving forces for the photo-oxidation reaction are identified: localization of the electron-hole pair and stabilization of the photohole by hydrogen bonding interaction. Our findings illustrate the scope of recent advances in NAMD methods and emphasize the importance of explicit simulation of electronic excitations.
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Affiliation(s)
- Mikko Muuronen
- Department of Chemistry , University of California , 1102 Natural Sciences II , Irvine , CA 92697-2025 , USA . ; ; ; Tel: +1 949 824-5051
| | - Shane M Parker
- Department of Chemistry , University of California , 1102 Natural Sciences II , Irvine , CA 92697-2025 , USA . ; ; ; Tel: +1 949 824-5051
| | - Enrico Berardo
- Department of Chemistry , Imperial College London , South Kensington , London , SW7 2AZ , UK
- Department of Chemistry , University College London , 20 Gordon Street , London WC1H 0AJ , UK
| | - Alexander Le
- Department of Chemistry , University of California , 1102 Natural Sciences II , Irvine , CA 92697-2025 , USA . ; ; ; Tel: +1 949 824-5051
| | - Martijn A Zwijnenburg
- Department of Chemistry , University College London , 20 Gordon Street , London WC1H 0AJ , UK
| | - Filipp Furche
- Department of Chemistry , University of California , 1102 Natural Sciences II , Irvine , CA 92697-2025 , USA . ; ; ; Tel: +1 949 824-5051
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98
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Zhang M, Frei H. Water Oxidation Mechanisms of Metal Oxide Catalysts by Vibrational Spectroscopy of Transient Intermediates. Annu Rev Phys Chem 2017; 68:209-231. [PMID: 28226220 DOI: 10.1146/annurev-physchem-052516-050655] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Water oxidation is an essential reaction of an artificial photosystem for solar fuel generation because it provides electrons needed to reduce carbon dioxide or protons to a fuel. Earth-abundant metal oxides are among the most attractive catalytic materials for this reaction because of their robustness and scalability, but their efficiency poses a challenge. Knowledge of catalytic surface intermediates gained by vibrational spectroscopy under reaction conditions plays a key role in uncovering kinetic bottlenecks and provides a basis for catalyst design improvements. Recent dynamic infrared and Raman studies reveal the molecular identity of transient surface intermediates of water oxidation on metal oxides. Combined with ultrafast infrared observations of how charges are delivered to active sites of the metal oxide catalyst and drive the multielectron reaction, spectroscopic advances are poised to play a key role in accelerating progress toward improved catalysts for artificial photosynthesis.
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Affiliation(s)
- Miao Zhang
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720;
| | - Heinz Frei
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720;
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99
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Ulman K, Nguyen MT, Seriani N, Piccinin S, Gebauer R. A Unified Picture of Water Oxidation on Bare and Gallium Oxide-Covered Hematite from Density Functional Theory. ACS Catal 2017. [DOI: 10.1021/acscatal.6b03162] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kanchan Ulman
- The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34151 Trieste, Italy
| | - Manh-Thuong Nguyen
- Center
for Computational Physics, Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan Street, Hanoi, Vietnam
| | - Nicola Seriani
- The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34151 Trieste, Italy
| | - Simone Piccinin
- CNR-IOM DEMOCRITOS, c/o SISSA, Via Bonomea 265, 34136 Trieste, Italy
| | - Ralph Gebauer
- The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34151 Trieste, Italy
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100
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Pallotti DK, Passoni L, Gesuele F, Maddalena P, Di Fonzo F, Lettieri S. Giant O 2-Induced Photoluminescence Modulation in Hierarchical Titanium Dioxide Nanostructures. ACS Sens 2017; 2:61-68. [PMID: 28722431 DOI: 10.1021/acssensors.6b00432] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We demonstrate exceptionally large modulation of PL intensity in hierarchical titanium dioxide (TiO2) nanostructures exposed to molecular oxygen (O2). Optical responsivities up to about 1100% at 20% O2 concentrations are observed in hyperbranched anatase-phase hierarchical structures, outperforming those obtainable by commercial TiO2 nanopowders (up to a factor of ∼7 for response to synthetic air) and significantly improving the ones typically reported in PL-based opto-chemical gas sensing using MOXs. The improved PL response is discussed in terms of the specific morphology of hierarchical structures, characterized by simultaneous presence of small nanoparticles, large surface areas, and large voids. These characteristics guarantee an optimal interplay between photogenerated charges, PL-active centers, and adsorbed gas molecules. The results highlight the potentialities offered by hierarchical structures based on TiO2 or other MOXs and open interesting scenarios toward the development of all-optical and/or hybrid (opto/electrical) chemical sensors with improved sensitivity.
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Affiliation(s)
- Deborah K. Pallotti
- Institute of Applied Sciences and Intelligent Systems (CNR-ISASI), Via Campi Flegrei 34, I-80078 Pozzuoli, Italy
| | - Luca Passoni
- Center for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia, Via Giovanni Pascoli, 70/3, 20133 Milano, Italy
- Dipartimento
di Fisica, Politecnico di Milano, piazza Leonardo da Vinci 32, Milano 20133 Italy
| | - Felice Gesuele
- Dipartimento
di Fisica “E. Pancini”, Università degli Studi di Napoli “Federico II”, Via Cintia I-80126 Napoli, Italy
| | - Pasqualino Maddalena
- Dipartimento
di Fisica “E. Pancini”, Università degli Studi di Napoli “Federico II”, Via Cintia I-80126 Napoli, Italy
| | - Fabio Di Fonzo
- Center for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia, Via Giovanni Pascoli, 70/3, 20133 Milano, Italy
| | - Stefano Lettieri
- Institute of Applied Sciences and Intelligent Systems (CNR-ISASI), Via Campi Flegrei 34, I-80078 Pozzuoli, Italy
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