1
|
Cheng Q, Wei H, Wang J, Wang ZQ, Gong XQ, Wang D. Clarifying the Direct Generation of •OH Radicals in Photocatalytic O 2 Reduction: Theoretical Prediction Combined with Experimental Validation. J Phys Chem Lett 2024; 15:8650-8659. [PMID: 39151150 DOI: 10.1021/acs.jpclett.4c01779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/18/2024]
Abstract
This work systematically studied thermocatalytic and photocatalytic pathways of formaldehyde degradation and H-assisted O2 reduction over a Pt13/anatase-TiO2(101) composite via DFT calculations together with constrained molecular dynamics (MD) simulations. We show that photocatalytic O2 reduction on Pt/TiO2 can directly generate •OH radicals (*O2 → *OOH → •OH) via two hydrogenation steps with small barriers, and the product selectivity (*H2O2 or •OH) is decided by the relative position between catalyst Fermi level and •OH/*H2O2 redox potential (theoretical determination of 0.07 V referencing to the SHE). Such a novel reaction channel was furthermore validated at the liquid-solid interface via constrained MD simulations and experimental electron paramagnetic resonance detections, and a wide range of H resources, e.g., *HCHO, *HCO, *H (H+ + e-), can always drive the direct •OH generation. The additional portion of e--triggered •OH radicals are prone to diffuse into solution or the TiO2 surface and furthermore cooperate with the conventional h+-driven photooxidations.
Collapse
Affiliation(s)
- Qian Cheng
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Hehe Wei
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Jinling Wang
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Zhi-Qiang Wang
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Xue-Qing Gong
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Dong Wang
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| |
Collapse
|
2
|
Wang L, Liu X, Wan L, Gao Y, Wang X, Liu J, Tan S, Guo Q, Zhao W, Hu W, Li Q, Yang J. Excitonic Effects of the Excited-State Photocatalytic Reaction at the Molecule/Metal Oxide Interface. J Phys Chem Lett 2024; 15:2096-2104. [PMID: 38358755 DOI: 10.1021/acs.jpclett.3c03075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
Excitonic effects caused by the Coulomb interaction between electrons and holes play a crucial role in photocatalysis at the molecule/metal oxide interface. As an ideal model for investigating the excitonic effect, coadsorption and photodissociation of water and methanol molecules on titanium dioxide involve complex ground-state thermalcatalytic and excited-state photocatalytic reaction processes. Herein, we systemically investigate the excited-state electronic structures of the coadsorption of H2O and CH3OH molecules on a rutile TiO2(110) surface by linear-response time-dependent density functional theory calculations and probe the reaction path for generating HCOOH or CO2, from ground-state and excited-state perspectives. The reaction barriers in excited-state calculations are significantly different from those in ground-state calculations during three processes, with the largest decrease being 0.94 eV for the Ti5c-O-CH2-O-Ti5c formation process.
Collapse
Affiliation(s)
- Lei Wang
- Department of Chemical Physics, and Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xiaofeng Liu
- School of Physics, Hefei University of Technology, Hefei, Anhui 230009, China
| | - Lingyun Wan
- Hefei National Research Center for Physical Sciences at the Microscale and Hefei National Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yunzhi Gao
- Hefei National Research Center for Physical Sciences at the Microscale and Hefei National Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xiaoning Wang
- Department of Chemical Physics, and Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jie Liu
- Hefei National Research Center for Physical Sciences at the Microscale and Hefei National Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Shijing Tan
- Hefei National Research Center for Physical Sciences at the Microscale and Hefei National Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Qing Guo
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Wenhui Zhao
- Department of Physics, Ningbo University, Ningbo, Zhejiang 315211, China
| | - Wei Hu
- Hefei National Research Center for Physical Sciences at the Microscale and Hefei National Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Qunxiang Li
- Department of Chemical Physics, and Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jinlong Yang
- Department of Chemical Physics, and Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| |
Collapse
|
3
|
Chae SY, Mehmood A, Park ED. Highly Selective Tandem Photoelectrochemical C-H Activation via Bromine Evolution Reaction in Two-Phase Electrolyte. J Am Chem Soc 2024; 146:4314-4319. [PMID: 38319372 DOI: 10.1021/jacs.3c12257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
The development of environmentally friendly and safe chemical processes using renewable energy sources is important. In this study, a photoelectrochemical (PEC) cell was used for the tandem bromination of sp3 carbon within a unique two-phase electrolyte system. By incorporation of a RuOx cocatalyst, the Ta3N5 photoelectrode demonstrated a remarkable selectivity for Br2 close to 100%. The kinetic study for charge carriers of photoelectrodes reveals that the improved charge transfer at Ta3N5/RuOx interfaces contributed to excellent photoelectrochemical Br2 evolution activity. The photoelectrochemically produced Br2 was utilized for bromination of α-sp3 carbon in toluene, 1-methylnaphthalene, ethylbenzene, or cyclohexane by the Ta3N5/RuOx photoanode with 100% regioselectivity. The coupling of the Ta3N5 photoanode and InP photocathode generated H2 and Br2 under light illumination without external bias. This study provides systematic insights into the design of photoelectrodes for solar-driven tandem bromination systems within the unique environment of a two-phase electrolyte system.
Collapse
Affiliation(s)
- Sang Youn Chae
- Department of Energy System Research, Ajou University, Suwon 16499, Republic of Korea
- Institute of NT-IT Fusion Technology, Ajou University, Suwon 16499, Republic of Korea
| | - Adeel Mehmood
- Department of Energy System Research, Ajou University, Suwon 16499, Republic of Korea
| | - Eun Duck Park
- Department of Energy System Research, Ajou University, Suwon 16499, Republic of Korea
- Department of Chemical Engineering, Ajou University, Suwon 16499, Republic of Korea
| |
Collapse
|
4
|
Mai S, Sun J, Fang Z, Xiao GB, Cao J. Metal Clusters Based Multifunctional Materials for Solar Cells. Chemistry 2024:e202303973. [PMID: 38179822 DOI: 10.1002/chem.202303973] [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: 11/29/2023] [Revised: 01/01/2024] [Accepted: 01/02/2024] [Indexed: 01/06/2024]
Abstract
As a multifunctional material, metal clusters have recently received some attention for their application in solar cells.This review delves into the multifaceted role of metal clusters in advancing solar cell technologies, covering diverse aspects from electron transport and interface modification to serving as molecular precursors for inorganic materials and acting as photosensitizers in metal-cluster sensitized solar cells (MCSSCs). The studies conducted by various researchers illustrate the crucial impact of metal clusters, such as gold nanoclusters (Au NCs), on enhancing solar cell efficiency through size-dependent effects, distinct interface behaviors, and tailored interface engineering. From optimizing charge transfer rates to improving light absorption and reducing carrier recombination, metal clusters prove instrumental in shaping the landscape of solar energy conversion.The promising performance of metal-cluster sensitized solar cells, coupled with their scalability and flexibility, positions them as a exciting avenue for future clean energy applications. The article concludes by emphasizing the need for continued interdisciplinary research and technological innovation to unlock the full potential of metal clusters in contributing to sustainable and high-performance solar cells.
Collapse
Affiliation(s)
- Sibei Mai
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Jia Sun
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Zihan Fang
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Guo-Bin Xiao
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Jing Cao
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| |
Collapse
|
5
|
Mahmood A, Perveen F, Akram T, Chen S, Irfan A, Chen H. Advancing nitrate reduction to ammonia: insights into mechanism, activity control, and catalyst design over Pt nanoparticle-based ZrO 2. RSC Adv 2023; 13:34497-34509. [PMID: 38024971 PMCID: PMC10667968 DOI: 10.1039/d3ra06449b] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 11/10/2023] [Indexed: 12/01/2023] Open
Abstract
The reduction of nitrogen oxides (NOx) to NH3, or N2 represents a crucial step in mitigating atmospheric NO3 and NO2 emissions, a significant contributor to air pollution. Among these reduction products, ammonia (NH3) holds particular significance due to its utility in nitrogen-based fertilizers and its versatile applications in various industrial processes. Platinum-based catalysts have exhibited promise in enhancing the rate and selectivity of these reduction reactions. In this study, we employ density functional theory (DFT) calculations to explore the catalytic potential of Pt nanoparticle (PtNP)-supported ZrO2 for the conversion of NO3 to NH3. The most favorable pathway for the NO3 reduction to NH3 follows a sequence, that is, NO3 → NO2 → NO → ONH → ONH2/HNOH → NH2/NH → NH2 → NH3, culminating in the production of valuable ammonia. The introduction of low-state Fe and Co dopants into the ZrO2 support reduces energy barriers for the most challenging rate-determining hydrogenation step in NOx reduction to NH3, demonstrating significant improvements in catalytic activity. The incorporation of dopants into the ZrO2 support results in a depletion of electron density within the Pt cocatalyst resulting in enhanced hydrogen transfer efficiency during the hydrogenation process. This study aims to provide insights into the catalytic activity of platinum-based ZrO2 catalysts and will help design new high-performance catalysts for the reduction of atmospheric pollutants and for energy applications.
Collapse
Affiliation(s)
- Ayyaz Mahmood
- School of Life Science and Technology, University of Electronic Science and Technology Chengdu 610054 China
- School of Mechanical Engineering, Dongguan University of Technology Dongguan 523808 China
- School of Art and Design, Guangzhou Panyu Polytechnic Guangzhou 511483 China
- Dongguan Institute of Science and Technology Innovation, Dongguan University of Technology Dongguan 523808 China
| | - Fouzia Perveen
- School of Interdisciplinary Engineering & Sciences (SINES), National University of Sciences and Technology (NUST) Sector H-12 Islamabad 44000 Pakistan
| | - Tehmina Akram
- CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, University of Science and Technology of China Hefei 230026 China
| | - Shenggui Chen
- School of Mechanical Engineering, Dongguan University of Technology Dongguan 523808 China
- School of Art and Design, Guangzhou Panyu Polytechnic Guangzhou 511483 China
- Dongguan Institute of Science and Technology Innovation, Dongguan University of Technology Dongguan 523808 China
| | - Ahmad Irfan
- Department of Chemistry, College of Science, King Khalid University P.O. Box 9004 Abha 61413 Saudi Arabia
| | - Huafu Chen
- School of Life Science and Technology, University of Electronic Science and Technology Chengdu 610054 China
| |
Collapse
|
6
|
Huang Z, Ma D, Nian P, Zhou Y, Wang D, Gong X, Wang Z, Yue Q. Coordinating Interface Polymerization with Micelle Mediated Assembly Towards Two-Dimensional Mesoporous Carbon/CoNi for Advanced Lithium-Sulfur Battery. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2207411. [PMID: 36965086 DOI: 10.1002/smll.202207411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 02/10/2023] [Indexed: 06/18/2023]
Abstract
Lithium-sulfur battery has attracted significant attention by virtues of their high theoretical energy density, natural abundance, and environmental friendliness. However, the notorious shuttle effect of polysulfides intermediates severely hinders its practical application. Herein, a novel 2D mesoporous N-doped carbon nanosheet with confined bimetallic CoNi nanoparticles sandwiched graphene (mNC-CoNi@rGO) is successfully fabricated through a coordinating interface polymerization and micelle mediated co-assembly strategy. mNC-CoNi@rGO serves as a robust host material that endows lithium-sulfur batteries with a high reversible capacity of 1115 mAh g-1 at 0.2 C after 100 cycles, superior rate capability, and excellent cycling stability with 679.2 mAh g-1 capacity retention over 700 cycles at 1 C. With sulfur contents of up to 5.0 mg cm-2 , the area capacity remains to be 5.1 mAh cm-2 after 100 cycles at 0.2 C. The remarkable performance is further resolved via a series of experimental characterizations combined with density functional theory calculations. These results reveal that the ordered mesoporous N-doped carbon-encapsulated graphene framework acts as the ion/electron transport highway with excellent electrical conductivity, while bimetallic CoNi nanoparticles enhance the polysulfides adsorption and catalytic conversion that simultaneously accelerate the multiphase sulfur/polysulfides/sulfides conversion and inhibit the polysulfides shuttle.
Collapse
Affiliation(s)
- Zheng Huang
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Dongsheng Ma
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Pei Nian
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, P. R. China
| | - Yu Zhou
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Dong Wang
- Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200 237, P. R. China
| | - Xueqing Gong
- Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200 237, P. R. China
| | - Zheng Wang
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, P. R. China
| | - Qin Yue
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| |
Collapse
|
7
|
Insights of Fe2O3 and MoO3 Electrodes for Electrocatalytic CO2 Reduction in Aprotic Media. Int J Mol Sci 2022; 23:ijms232113367. [DOI: 10.3390/ijms232113367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/14/2022] [Accepted: 10/16/2022] [Indexed: 11/06/2022] Open
Abstract
Transition metal oxides (TMO) have been successfully used as electrocatalytically active materials for CO2 reduction in some studies. Because of the lack of understanding of the catalytic behavior of TMOs, electrochemical methods are used to investigate the CO2 reduction in thin-film nanostructured electrodes. In this context, nanostructured thin films of Fe2O3 and MoO3 in an aprotic medium of acetonitrile have been used to study the CO2 reduction reaction. In addition, a synergistic effect between CO2 and the TMO surface is observed. Faradic cathodic processes not only start at lower potentials than those reported with metal electrodes, but also an increase in capacitive currents is observed, which is directly related to an increase in oxygen vacancies. Finally, the results obtained show CO as a product of the reduction.
Collapse
|
8
|
Zhao J, Chen Y, Guan R, Cheng X, Wu Z, Zhao N, Shang Q, Sun Y. Enhancement of water soluble PDI-NapSO3H on the photocatalytic performance of Fe-TiO2 under visible light. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
9
|
Ding YF, Pan LY, Wan Q, Yin SF, Cai MQ. Recognition of Water-Induced Double-Edged Sword Effects in Photocatalytic Selective Oxidation of Toluene on Titanium Dioxide Clusters with Density Functional Theory Calculations. J Org Chem 2022; 88:6304-6312. [PMID: 36001795 DOI: 10.1021/acs.joc.2c01276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Abstract
Recently, water promotion effects in the selective oxidation of benzyl alcohol to benzaldehyde have been experimentally recognized and identified. However, the effects of water on the photocatalytic selective oxidation of toluene into benzaldehyde remain elusive. In this work, the Ti3O9H6 clusters in different solvents (water and toluene solvent) are used to study the water-induced effects in photocatalytic oxidation reactions in kinetics and thermodynamics using density functional theory (DFT) calculations. In addition, the influences of the OH groups on catalysts (Ti-OH bonds) from photocatalytic water splitting are also considered. The results clearly demonstrate the water-induced double-edged sword effects in the photocatalytic selective oxidation of toluene. We expect that our work can not only shed light on the mechanisms of photocatalytic selective oxidation of toluene into benzaldehyde and other activation reactions of sp3 C-H bonds but also design and modulate highly efficient photocatalysts.
Collapse
Affiliation(s)
- Yu-Feng Ding
- School of Physics and Electronics Science, Hunan University, Changsha 410082, P.R. China
| | - Ling-Yu Pan
- School of Physics and Electronics Science, Hunan University, Changsha 410082, P.R. China
| | - Qiang Wan
- School of Physics and Electronics Science, Hunan University, Changsha 410082, P.R. China
| | - Shuang-Feng Yin
- Advanced Catalytic Engineering Research Center of the Ministry of Education, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Provincial Hunan Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions, Hunan University, Changsha 410082, Hunan Province, P.R. China
| | - Meng-Qiu Cai
- School of Physics and Electronics Science, Hunan University, Changsha 410082, P.R. China
| |
Collapse
|
10
|
Xie ZL, Wang D, Gong XQ. Theoretical Insights into Nitrate Reduction to Ammonia over Pt/TiO 2: Reaction Mechanism, Activity Regulation, and Catalyst Design. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01694] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zheng-Li Xie
- Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Dong Wang
- Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Xue-Qing Gong
- Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| |
Collapse
|
11
|
Yang JJ, Zhang Y, Xie XY, Fang WH, Cui G. Photocatalytic Reduction of Carbon Dioxide to Methane at the Pd-Supported TiO 2 Interface: Mechanistic Insights from Theoretical Studies. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jia-Jia Yang
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Yang Zhang
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Xiao-Ying Xie
- The Laboratory of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Wei-Hai Fang
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Ganglong Cui
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| |
Collapse
|
12
|
Korpelin V, Kiljunen T, Melander MM, Caro MA, Kristoffersen HH, Mammen N, Apaja V, Honkala K. Addressing Dynamics at Catalytic Heterogeneous Interfaces with DFT-MD: Anomalous Temperature Distributions from Commonly Used Thermostats. J Phys Chem Lett 2022; 13:2644-2652. [PMID: 35297635 PMCID: PMC8959310 DOI: 10.1021/acs.jpclett.2c00230] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 03/11/2022] [Indexed: 05/28/2023]
Abstract
Density functional theory-based molecular dynamics (DFT-MD) has been widely used for studying the chemistry of heterogeneous interfacial systems under operational conditions. We report frequently overlooked errors in thermostated or constant-temperature DFT-MD simulations applied to study (electro)catalytic chemistry. Our results demonstrate that commonly used thermostats such as Nosé-Hoover, Berendsen, and simple velocity-rescaling methods fail to provide a reliable temperature description for systems considered. Instead, nonconstant temperatures and large temperature gradients within the different parts of the system are observed. The errors are not a "feature" of any particular code but are present in several ab initio molecular dynamics implementations. This uneven temperature distribution, due to inadequate thermostatting, is well-known in the classical MD community, where it is ascribed to the failure in kinetic energy equipartition among different degrees of freedom in heterogeneous systems (Harvey et al. J. Comput. Chem. 1998, 726-740) and termed the flying ice cube effect. We provide tantamount evidence that interfacial systems are susceptible to substantial flying ice cube effects and demonstrate that the traditional Nosé-Hoover and Berendsen thermostats should be applied with care when simulating, for example, catalytic properties or structures of solvated interfaces and supported clusters. We conclude that the flying ice cube effect in these systems can be conveniently avoided using Langevin dynamics.
Collapse
Affiliation(s)
- Ville Korpelin
- Department
of Chemistry, Nanoscience Center, University
of Jyväskylä, P.O. Box 35 (YN), FI-40014 Jyväskylä, Finland
| | - Toni Kiljunen
- Department
of Chemistry, Nanoscience Center, University
of Jyväskylä, P.O. Box 35 (YN), FI-40014 Jyväskylä, Finland
| | - Marko M. Melander
- Department
of Chemistry, Nanoscience Center, University
of Jyväskylä, P.O. Box 35 (YN), FI-40014 Jyväskylä, Finland
| | - Miguel A. Caro
- Department
of Electrical Engineering and Automation, Aalto University, FIN-02150 Espoo, Finland
| | | | - Nisha Mammen
- Department
of Physics,Nanoscience Center, University
of Jyväskylä, P.O. Box
35 (YN), FI-40014 Jyväskylä, Finland
| | - Vesa Apaja
- Department
of Physics,Nanoscience Center, University
of Jyväskylä, P.O. Box
35 (YN), FI-40014 Jyväskylä, Finland
| | - Karoliina Honkala
- Department
of Chemistry, Nanoscience Center, University
of Jyväskylä, P.O. Box 35 (YN), FI-40014 Jyväskylä, Finland
| |
Collapse
|
13
|
Yang X, Zhang B, Gao Y, Liu C, Li G, Rao B, Chu D, Yan N, Zhang M, He G. Efficient Photoinduced Electron Transfer from Pyrene-o-Carborane Heterojunction to Selenoviologen for Enhanced Photocatalytic Hydrogen Evolution and Reduction of Alkynes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2101652. [PMID: 34957686 PMCID: PMC8844576 DOI: 10.1002/advs.202101652] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 07/10/2021] [Indexed: 05/03/2023]
Abstract
A series of pyrene or pyrene-o-carborane-appendant selenoviologens (Py-SeV2+ , Py-Cb-SeV2+ ) for enhanced photocatalytic hydrogen evolution reaction (HER) and reduction of alkynes is reported. The efficient photoinduced electron transfer (PET) from electron-rich pyrene-o-carborane heterojunction (Py-Cb) with intramolecular charge transfer (ICT) characteristic to electron-deficient selenoviologen (SeV2+ ) (kET = 1.2 × 1010 s-1 ) endows the accelerating the generation of selenoviologen radical cation (SeV+• ) compared with Py-SeV2+ and other derivatives. The electrochromic/electrofluorochromic devices' (ECD and EFCD) measurements and supramolecular assembly/disassembly processes of SeV2+ and cucurbit[8]uril (CB[8]) results show that the PET process can be finely tuned by electrochemical and host-guest chemistry methods. By combination with Pt-NPs catalyst, the Py-Cb-SeV2+ -based system shows high-efficiency visible-light-driven HER and highly selective phenylacetylene reduction due to the efficient PET process.
Collapse
Affiliation(s)
- Xiaodong Yang
- Key Laboratory of Thermo‐Fluid Science and Engineering of Ministry of EducationSchool of Energy and Power EngineeringFrontier Institute of Science and TechnologyXi'an Jiaotong UniversityXi'anShaanxi710054P. R. China
| | - Bingjie Zhang
- Key Laboratory of Thermo‐Fluid Science and Engineering of Ministry of EducationSchool of Energy and Power EngineeringFrontier Institute of Science and TechnologyXi'an Jiaotong UniversityXi'anShaanxi710054P. R. China
| | - Yujing Gao
- Key Laboratory of Thermo‐Fluid Science and Engineering of Ministry of EducationSchool of Energy and Power EngineeringFrontier Institute of Science and TechnologyXi'an Jiaotong UniversityXi'anShaanxi710054P. R. China
| | - Chenjing Liu
- Key Laboratory of Thermo‐Fluid Science and Engineering of Ministry of EducationSchool of Energy and Power EngineeringFrontier Institute of Science and TechnologyXi'an Jiaotong UniversityXi'anShaanxi710054P. R. China
| | - Guoping Li
- Key Laboratory of Thermo‐Fluid Science and Engineering of Ministry of EducationSchool of Energy and Power EngineeringFrontier Institute of Science and TechnologyXi'an Jiaotong UniversityXi'anShaanxi710054P. R. China
| | - Bin Rao
- Key Laboratory of Thermo‐Fluid Science and Engineering of Ministry of EducationSchool of Energy and Power EngineeringFrontier Institute of Science and TechnologyXi'an Jiaotong UniversityXi'anShaanxi710054P. R. China
| | - Dake Chu
- The First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an Jiaotong UniversityXi'anShaanxi710054P. R. China
| | - Ni Yan
- School of Materials Science & EngineeringEngineering Research Center of Transportation MaterialsMinistry of EducationChang'an UniversityXi'anShaanxi710054P. R. China
| | - Mingming Zhang
- School of Materials Science and EngineeringXi'an Jiaotong UniversityXi'anShaanxi710054P. R. China
| | - Gang He
- Key Laboratory of Thermo‐Fluid Science and Engineering of Ministry of EducationSchool of Energy and Power EngineeringFrontier Institute of Science and TechnologyXi'an Jiaotong UniversityXi'anShaanxi710054P. R. China
| |
Collapse
|
14
|
Li Z, Mao Y, Huang Y, Wei D, Chen M, Huang Y, Jin B, Luo X, Liang ZW. Theoretical and experimental studies of high efficient all-solid Z-scheme TiO2-TiC/g-C3N4 for photocatalytic CO2 reduction via dry reforming of methane. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00085g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
All-solid Z-scheme heterojunction TiO2-TiC/g-C3N4 was proposed and synthesized successfully by a facile calcination method and used for photocatalytic CO2 reduction in the presence of CH4. Under sub-atmospheric pressure and room...
Collapse
|
15
|
Computational modeling of green hydrogen generation from photocatalytic H2S splitting: Overview and perspectives. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C: PHOTOCHEMISTRY REVIEWS 2021. [DOI: 10.1016/j.jphotochemrev.2021.100456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
16
|
Zheng M, Yang J, Fan W, Zhao X. Oxygen vacancy and nitrogen doping collaboratively boost performance and stability of TiO 2-supported Pd catalysts for CO 2 photoreduction: a DFT study. Phys Chem Chem Phys 2021; 23:24801-24813. [PMID: 34714307 DOI: 10.1039/d1cp03693a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The regulation of interfacial charge transfer, optimization of active sites, and maintenance of stability are effective strategies for improving catalytic performance. The effect of the oxygen vacancy (VO) and nitrogen doping on these parameters for CO2 photoreduction on Pd10/TiO2(101) was studied using density functional theory calculations. The results demonstrate that introduction of the VO could trigger reversed electron transfer, making the VO and Pd atoms the active center for CO2 reduction. However, the VO is repaired by the dissociated O atom. The combined effect of the VO and N is related to the position of N. Although the substitutional N (NS) can delocalize electrons at the VO, it cannot improve the activity and stability. The interstitial N (Ni) located below the VO forms Ni-Ti bonds with two Ti atoms adjacent to the VO. This can delocalize the electrons near the VO, and the five-fold-coordinated titanium (Ti5C) replaces the VO as the active center, thus enhancing the reactivity and protecting the VO. Further research indicates that the co-modification of the VO and Ni improves photoexcited electron transfer and distribution, which would in turn promote CO2 reduction. The results of this study propose that surface defect engineering holds great promise for boosting CO2 photoreduction by integrating functions of electron density modulation and catalysis.
Collapse
Affiliation(s)
- Mingyue Zheng
- School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Jing Yang
- College of Chemical Engineering, Shijiazhuang University, Shijiazhuang, 050035, P. R. China
| | - Weiliu Fan
- School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Xian Zhao
- School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| |
Collapse
|
17
|
Rice PS, Liu ZP, Hu P. Hydrogen Coupling on Platinum Using Artificial Neural Network Potentials and DFT. J Phys Chem Lett 2021; 12:10637-10645. [PMID: 34704763 DOI: 10.1021/acs.jpclett.1c02998] [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
To date, the understanding of reactions at solid-liquid interfaces has proven challenging, mainly because of the inaccessible nature of such systems to current experimental techniques with atomic resolution. This has meant that many important features, including free energy barriers and the atomistic structure of intermediates, remain unknown. To tackle these issues, we construct and utilize a high-dimensional neural network (HDNN) potential for the simulation of hydrogen evolution at the HCl(aq)/Pt(111) interface, taking into consideration the influence of adsorbate-adsorbate, adsorbate-solvent interactions, and ion solvation explicitly. Long time scale MD simulations reveal coadsorbed Had/H2Oad on the surface. The free energy profiles for the Tafel and Heyrovsky type hydrogen coupling are extracted using umbrella sampling. It is found that the preferential mechanism can change depending on the surface coverage, highlighting the dual mechanistic nature for HER on Pt(111). Our work demonstrates the importance of controlling the solvent-substrate interactions in developing catalysts beyond Pt.
Collapse
Affiliation(s)
- Peter S Rice
- School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast BT9 5AG, Northern Ireland
| | - Zhi-Pan Liu
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Key Laboratory of Computational Physical Science (Ministry of Education), Fudan University, Shanghai 200433, China
| | - P Hu
- School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast BT9 5AG, Northern Ireland
| |
Collapse
|
18
|
Li F, Wang D, Gong XQ. Subtle structure matters: boosting surface-directed photoelectron transfer via the introduction of specific monovalent oxygen vacancies in TiO 2. Phys Chem Chem Phys 2021; 23:19854-19861. [PMID: 34525137 DOI: 10.1039/d1cp02787e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Oxygen vacancies (Ov) are widely considered to play crucial roles in photocatalysis, but how and why they contribute to improved performances remains controversial. In this work, we studied the promotional effect of Ov on photoelectron transfer in TiO2, using first-principles density functional theory calculations with correction for on-site Coulomb interactions. We explicitly identified three types of Ov with different charge states (i.e., charge-neutral , monovalent , divalent Ov2+) via electronic structure analysis. Electron transfer energy calculations revealed that the ionized Ov in anatase TiO2 are able to collect excess electrons whereas those in the rutile phase are not. The presence of ionized Ov further endows anatase TiO2 with directional electron transfer along the [100] orientation, in favor of anatase TiO2(101) for photocatalytic reduction surpassing the (001) termination. After examining various combination modes of ionized Ov involving different charge states and spatial distributions, we demonstrated that the vertical chain in anatase TiO2(101) is the most catalytically effective Ov pattern in TiO2. These results signify the importance of subtle defects in photocatalysis and may assist future photocatalyst design toward higher photocatalytic efficiency.
Collapse
Affiliation(s)
- Fei Li
- Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China.
| | - Dong Wang
- Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China.
| | - Xue-Qing Gong
- Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China.
| |
Collapse
|
19
|
Zhang X, Qin N, Cui H, Guan G, Han MY. Metal-facilitated Photocatalytic Nanohybrids: Rational Design and Promising Environmental Applications. Chem Asian J 2021; 16:3038-3054. [PMID: 34402593 DOI: 10.1002/asia.202100762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 08/15/2021] [Indexed: 11/07/2022]
Abstract
As a promising technique to potentially address the energy crisis and environmental issues, photocatalysis has been reported widely to exhibit various outstanding behaviors in production of new fuels/chemicals and treatment of contaminants. The photocatalytic performance is extremely dependent on the used photocatalysts, so that the design and preparation of efficient photocatalysts are critically important for significantly improving the photocatalytic activity. Among various strategies, the hybridization of metal with semiconductors has recently been attracting more and more research interest owing to their expended spectral absorption, promoted transferring rate of charge carriers and Plasmon-enhanced effect. In this minireview, the metal-facilitated hybrid photocatalysts are overviewed comprehensively to first reveal unique functions of metals in improvement of photoactivity and summarize the emerging metal-involved hybrid systems. Subsequently, the synthetic methods towards hybrid photocatalysts are introduced and their practical applications are emphasized in environmental remediation including degradation of organic pollutants, conversion of harmful gases, treatment of heavy metal ions and sterilization of bacteria. At the end, the challenges for industrializing these hybrid photocatalysts are discussed carefully and future development is suggested rationally.
Collapse
Affiliation(s)
- Xiaohui Zhang
- Institute of Molecular Plus, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, 300072, P. R. China
| | - Neng Qin
- Institute of Molecular Plus, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, 300072, P. R. China
| | - Hongbo Cui
- Institute of Molecular Plus, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, 300072, P. R. China
| | - Guijian Guan
- Institute of Molecular Plus, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, 300072, P. R. China
| | - Ming-Yong Han
- Institute of Materials Research and Engineering, A*STAR, 2 Fusionopolis Way, Singapore, 138634, Singapore
| |
Collapse
|
20
|
Porphyrin-Based Metal–Organic Frameworks for Efficient Photocatalytic H2 Production under Visible-Light Irradiation. Inorg Chem 2021; 60:3988-3995. [DOI: 10.1021/acs.inorgchem.1c00041] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
21
|
Function-oriented design of robust metal cocatalyst for photocatalytic hydrogen evolution on metal/titania composites. Nat Commun 2021; 12:158. [PMID: 33420037 PMCID: PMC7794313 DOI: 10.1038/s41467-020-20464-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 12/01/2020] [Indexed: 11/08/2022] Open
Abstract
While the precise design of catalysts is one of ultimate goals in catalysis, practical strategies often fall short, especially for complicated photocatalytic processes. Here, taking the hydrogen evolution reaction (HER) as an example, we introduce a theoretical approach for designing robust metal cocatalysts supported on TiO2 using density functional theory calculations adopting on-site Coulomb correction and/or hybrid functionals. The approach starts with clarifying the individual function of each metal layer of metal/TiO2 composites in photocatalytic HER, covering both the electron transfer and surface catalysis aspects, followed by conducting a function-oriented optimization via exploring competent candidates. With this approach, we successfully determine and verify bimetallic Pt/Rh/TiO2 and Pt/Cu/TiO2 catalysts to be robust substitutes for conventional Pt/TiO2. The right metal type as well as the proper stacking sequence are demonstrated to be key to boosting performance. Moreover, we tentatively identify the tunneling barrier height as an effective descriptor for the important electron transfer process in photocatalysis on metal/oxide catalysts. We believe that this study pushes forward the frontier of photocatalyst design towards higher water splitting efficiency.
Collapse
|
22
|
Ding Y, Shen Y, Peng C, Huang M, Hu P. Unraveling the Photogenerated Electron Localization on the Defect-Free CH 3NH 3PbI 3(001) Surfaces: Understanding and Implications from a First-Principles Study. J Phys Chem Lett 2020; 11:8041-8047. [PMID: 32893641 DOI: 10.1021/acs.jpclett.0c02105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The localization of photogenerated electrons in photovoltaic and photocatalytic materials is crucial for reducing the electron-hole recombination rate. Here, the photogenerated electron localization is systematically investigated on the CH3NH3PbI3 (MAPbI3) perovskite using first-principles calculations. It is found that under vacuum conditions, the photogenerated electron is delocalized in the MAPbI3 bulk as well as on the stochiometric MAPbI3(001) surface with the CH3NH3I (MAI) termination, while it is trapped on the defect-free PbI2-terminated surface. Our ab initio molecular dynamics simulations reveal that the introduction of solutions will prompt the formation of localized electronic states. The photogenerated electron is discovered to be localized on both the MAI- and PbI2-terminated surfaces in the presence of solutions with different concentrations of HI, from pure water to the saturated solution. We demonstrate that the Pb-I bond weakening or breaking resulting in an unsaturated coordination of a Pb site is the prerequisite to trap the photogenerated electron.
Collapse
Affiliation(s)
- Yunxuan Ding
- School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast BT9 5AG, U.K
| | - Yujie Shen
- School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast BT9 5AG, U.K
| | - Chao Peng
- School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast BT9 5AG, U.K
| | - Meilan Huang
- School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast BT9 5AG, U.K
| | - P Hu
- School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast BT9 5AG, U.K
| |
Collapse
|
23
|
Zhang Y, Dai Y, Li H, Yin L, Hoffmann MR. Proton-assisted electron transfer and hydrogen-atom diffusion in a model system for photocatalytic hydrogen production. COMMUNICATIONS MATERIALS 2020; 1:66. [PMID: 33029593 PMCID: PMC7505813 DOI: 10.1038/s43246-020-00068-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 07/02/2020] [Indexed: 06/11/2023]
Abstract
Solar energy can be converted into chemical energy by photocatalytic water splitting to produce molecular hydrogen. Details of the photo-induced reaction mechanism occurring on the surface of a semiconductor are not fully understood, however. Herein, we employ a model photocatalytic system consisting of single atoms deposited on quantum dots that are anchored on to a primary photocatalyst to explore fundamental aspects of photolytic hydrogen generation. Single platinum atoms (Pt1) are anchored onto carbon nitride quantum dots (CNQDs), which are loaded onto graphitic carbon nitride nanosheets (CNS), forming a Pt1@CNQDs/CNS composite. Pt1@CNQDs/CNS provides a well-defined photocatalytic system in which the electron and proton transfer processes that lead to the formation of hydrogen gas can be investigated. Results suggest that hydrogen bonding between hydrophilic surface groups of the CNQDs and interfacial water molecules facilitates both proton-assisted electron transfer and sorption/desorption pathways. Surface bound hydrogen atoms appear to diffuse from CNQDs surface sites to the deposited Pt1 catalytic sites leading to higher hydrogen-atom fugacity surrounding each isolated Pt1 site. We identify a pathway that allows for hydrogen-atom recombination into molecular hydrogen and eventually to hydrogen bubble evolution.
Collapse
Affiliation(s)
- Yuanzheng Zhang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, China
| | - Yunrong Dai
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, P. R. China
- Division of Engineering and Applied Science, Linde-Robinson Laboratory, California Institute of Technology, Pasadena, CA 91125 USA
| | - Huihui Li
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, China
| | - Lifeng Yin
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, China
- Division of Engineering and Applied Science, Linde-Robinson Laboratory, California Institute of Technology, Pasadena, CA 91125 USA
| | - Michael R. Hoffmann
- Division of Engineering and Applied Science, Linde-Robinson Laboratory, California Institute of Technology, Pasadena, CA 91125 USA
| |
Collapse
|
24
|
Coordination dependence of carbon deposition resistance in partial oxidation of methane on Rh catalysts. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.07.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
25
|
Zhong Y, Wang R, Wang X, Lin Z, Jiang G, Yang M, Xu D. A Ti-MOF Decorated With a Pt Nanoparticle Cocatalyst for Efficient Photocatalytic H 2 Evolution: A Theoretical Study. Front Chem 2020; 8:660. [PMID: 32850672 PMCID: PMC7427410 DOI: 10.3389/fchem.2020.00660] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Accepted: 06/25/2020] [Indexed: 12/03/2022] Open
Abstract
Pt nanoparticles (NPs) are often used as cocatalysts to enhance the photocatalytic hydrogen production catalyzed by the metal organic framework (MOF) materials. The catalytic efficiency of many Pt/MOF systems can be greatly improved when Pt NPs are used as cocatalysts. In this work, the Pt/20%-MIL-125-(SCH3)2 was chosen as the template material to understand the functional role of a Pt metal cocatalyst in the catalytic process. Experimentally, the catalytic activity of Pt/20%-MIL-125-(SCH3)2 is more than 100 times that of the system without the help of Pt NPs. Firstly, we proposed a searching algorithm, which is based on the combined Monte Carlo (MC) method and principal component analysis (PCA) algorithm, to find that the most probable adsorption site of the Pt13 nanocluster loaded on the (001) surface of 20%-MIL-125-(SCH3)2. Next, by using density functional theory (DFT) and time-dependent density functional theory (TDDFT) methods, we revealed that the accumulation of some positive charges on the Pt13 cluster and proton adsorbed on the Pt13 cluster, which can promote the separation of photogenerated electrons and holes, thus improving the photocatalytic efficiency. This work not only provides a method to obtain the adsorption configuration of metal clusters on various MOFs but also provides a new insight into increasing photocatalytic efficiency for H2 production in Pt/MOF systems.
Collapse
Affiliation(s)
- Yeshuang Zhong
- College of Chemistry, MOE Key Laboratory of Green Chemistry and Technology, Sichuan University, Chengdu, China
| | - Ruihan Wang
- College of Chemistry, MOE Key Laboratory of Green Chemistry and Technology, Sichuan University, Chengdu, China
| | - Xin Wang
- College of Chemistry, MOE Key Laboratory of Green Chemistry and Technology, Sichuan University, Chengdu, China
| | - Zhien Lin
- College of Chemistry, MOE Key Laboratory of Green Chemistry and Technology, Sichuan University, Chengdu, China
| | - Gang Jiang
- Institute of Atomic and Molecular Physics, MOE Key Laboratory of High Energy Density Physics and Technology, Sichuan University, Chengdu, China
| | - Mingli Yang
- Institute of Atomic and Molecular Physics, MOE Key Laboratory of High Energy Density Physics and Technology, Sichuan University, Chengdu, China.,Research Center for Material Genome Engineering, Sichuan University, Chengdu, China
| | - Dingguo Xu
- College of Chemistry, MOE Key Laboratory of Green Chemistry and Technology, Sichuan University, Chengdu, China.,Research Center for Material Genome Engineering, Sichuan University, Chengdu, China
| |
Collapse
|
26
|
Shahvaranfard F, Ghigna P, Minguzzi A, Wierzbicka E, Schmuki P, Altomare M. Dewetting of PtCu Nanoalloys on TiO 2 Nanocavities Provides a Synergistic Photocatalytic Enhancement for Efficient H 2 Evolution. ACS APPLIED MATERIALS & INTERFACES 2020; 12:38211-38221. [PMID: 32706239 DOI: 10.1021/acsami.0c10968] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We investigate the co-catalytic activity of PtCu alloy nanoparticles for photocatalytic H2 evolution from methanol-water solutions. To produce the photocatalysts, a few-nanometer-thick Pt-Cu bilayers are deposited on anodic TiO2 nanocavity arrays and converted by solid-state dewetting via a suitable thermal treatment into bimetallic PtCu nanoparticles. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) results prove the formation of PtCu nanoalloys that carry a shell of surface oxides. X-ray absorption near-edge structure (XANES) data support Pt and Cu alloying and indicate the presence of lattice disorder in the PtCu nanoparticles. The PtCu co-catalyst on TiO2 shows a synergistic activity enhancement and a significantly higher activity toward photocatalytic H2 evolution than Pt- or Cu-TiO2. We propose the enhanced activity to be due to Pt-Cu electronic interactions, where Cu increases the electron density on Pt, favoring a more efficient electron transfer for H2 evolution. In addition, Cu can further promote the photoactivity by providing additional surface catalytic sites for hydrogen recombination. Remarkably, when increasing the methanol concentration up to 50 vol % in the reaction phase, we observe for PtCu-TiO2 a steeper activity increase compared to Pt-TiO2. A further increase in methanol concentration (up to 80 vol %) causes for Pt-TiO2 a clear activity decay, while PtCu-TiO2 still maintains a high level of activity. This suggests improved robustness of PtCu nanoalloys against poisoning from methanol oxidation products such as CO.
Collapse
Affiliation(s)
- Fahimeh Shahvaranfard
- Institute for Surface Science and Corrosion WW4-LKO, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058 Erlangen, Germany
| | - Paolo Ghigna
- Dipartimento di Chimica, Università degli Studi di Pavia, Viale Taramelli 13, 27100 Pavia, Italy
| | - Alessandro Minguzzi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milan, Italy
| | - Ewa Wierzbicka
- Institute for Surface Science and Corrosion WW4-LKO, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058 Erlangen, Germany
| | - Patrik Schmuki
- Institute for Surface Science and Corrosion WW4-LKO, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058 Erlangen, Germany
- Chemistry Department, Faculty of Sciences, King Abdulaziz University, 80203 Jeddah, Kingdom of Saudi Arabia
| | - Marco Altomare
- Institute for Surface Science and Corrosion WW4-LKO, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058 Erlangen, Germany
| |
Collapse
|
27
|
Wen B, Yin WJ, Selloni A, Liu LM. Site dependent reactivity of Pt single atoms on anatase TiO 2(101) in an aqueous environment. Phys Chem Chem Phys 2020; 22:10455-10461. [PMID: 31674604 DOI: 10.1039/c9cp05097c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The TiO2-Pt-water interface is of great relevance in photocatalysis where Pt is widely used as a co-catalyst for enhancing hydrogen evolution in aqueous TiO2. Using ab initio molecular dynamics, we investigated this interface focusing on Pt single atoms supported on anatase TiO2(101) in a water environment. Based on recent experiments showing a broad distribution of Pt coordination sites in TiO2, we examined six distinct single-Pt supported species with different nominal Pt oxidation states, namely: Pt, PtOH, and PtO2 species adsorbed on the stoichiometric surface; Pt adsorbed at a surface oxygen vacancy (Ov); and Pt substituting a surface Ti cation (PtTi), both without and with an accompanying Ov (PtTi + Ov). As found for the pristine anatase surface, interfacial water remained intact in the presence of a nearly neutral Pt adatom within the time duration of our simulations (∼15 ps). Similarly, no (or only temporary) water dissociation was observed at the PtTi + Ov and PtO2 interfaces, due to the formation of very stable planar Pt coordination structures that interact only weakly with water. In contrast, water dissociated with OH- (H+) on the Pt atom when this substituted a surface Ti (oxygen) ion as well as on PtOH. The significant proton affinity of Pt atoms at surface oxygen vacancies suggests that negatively charged Pt species are particularly efficient at catalyzing hydrogen evolution in aqueous TiO2.
Collapse
Affiliation(s)
- Bo Wen
- Beijing Computational Science Research Center, Beijing 100193, China
| | | | | | | |
Collapse
|
28
|
The effective photocatalytic water splitting to simultaneously produce H2 and H2O2 over Pt loaded K-g-C3N4 catalyst. J Taiwan Inst Chem Eng 2020. [DOI: 10.1016/j.jtice.2019.12.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
29
|
Kawawaki T, Negishi Y, Kawasaki H. Photo/electrocatalysis and photosensitization using metal nanoclusters for green energy and medical applications. NANOSCALE ADVANCES 2020; 2:17-36. [PMID: 36133985 PMCID: PMC9417545 DOI: 10.1039/c9na00583h] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Accepted: 10/17/2019] [Indexed: 05/06/2023]
Abstract
Owing to the rapidly increasing demand for sustainable technologies in fields such as energy, environmental science, and medicine, nanomaterial-based photo/electrocatalysis has received increasing attention. Recently, synthetic innovations have allowed the fabrication of atomically precise metal nanoclusters (NCs). These NCs show potential for green energy and medical applications. The present article primarily focuses on evaluation of the recent developments in the photo/electrocatalytic and photosensitizing characteristics of metal and alloy NCs. The review comprises two sections: (i) photo/electrocatalysis for green energy and (ii) photosensitization for biomedical therapy applications. Finally, the challenges associated with the use of metal NCs are presented on the basis of current developments.
Collapse
Affiliation(s)
- Tokuhisa Kawawaki
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science 1-3 Kagurazaka, Shinjuku-ku Tokyo 162-8601 Japan
| | - Yuichi Negishi
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science 1-3 Kagurazaka, Shinjuku-ku Tokyo 162-8601 Japan
| | - Hideya Kawasaki
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University Suita-shi Osaka 564-8680 Japan
| |
Collapse
|
30
|
Yu F, Hu Z. Identifying the role of excess electrons and holes for initiating the photocatalytic dissociation of methanol on a TiO 2(110) surface. Phys Chem Chem Phys 2020; 22:11086-11094. [DOI: 10.1039/d0cp00332h] [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
As a prototype for the catalytic oxidation of organic contaminants, photocatalytic methanol dissociation on rutile TiO2(110) has drawn much attention, but its reaction mechanism remains elusive.
Collapse
Affiliation(s)
- Fengdu Yu
- College of Mathematics and Physics
- Beijing University of Chemical Technology
- Beijing
- People's Republic of China
| | - Ziyu Hu
- College of Mathematics and Physics
- Beijing University of Chemical Technology
- Beijing
- People's Republic of China
| |
Collapse
|
31
|
Wang D, Wang CM, Yang WM. Three-Dimensional Kinetic Trends in Zeolites Catalyzed Benzene Ethylation Reaction: A Descriptor-Based DFT Study Coupled with Microkinetic Modeling. ACS Catal 2019. [DOI: 10.1021/acscatal.9b04556] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dong Wang
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, China
- Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Chuan-Ming Wang
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, China
| | - Wei-Min Yang
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, China
| |
Collapse
|
32
|
Dramatically Enhanced Photocatalytic Activity of TiO2 Composite Microspheres by Loading Special Copper Nanocrystalline. Catal Letters 2019. [DOI: 10.1007/s10562-019-03046-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
33
|
Rice PS, Hu P. Understanding supported noble metal catalysts using first-principles calculations. J Chem Phys 2019; 151:180902. [PMID: 31731867 DOI: 10.1063/1.5126090] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Heterogeneous catalysis on supported and nonsupported nanoparticles is of fundamental importance in the energy and chemical conversion industries. Rather than laboratory analysis, first-principles calculations give us an atomic-level understanding of the structure and reactivity of nanoparticles and supports, greatly reducing the efforts of screening and design. However, unlike catalysis on low index single crystalline surfaces, nanoparticle catalysis relies on the tandem properties of a support material as well as the metal cluster itself, often with charge transfer processes being of key importance. In this perspective, we examine current state-of-the-art quantum-chemical research for the modeling of reactions that utilize small transition metal clusters on metal oxide supports. This should provide readers with useful insights when dealing with chemical reactions on such systems, before discussing the possibilities and challenges in the field.
Collapse
Affiliation(s)
- Peter S Rice
- School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast BT9 5AG, Northern Ireland
| | - P Hu
- School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast BT9 5AG, Northern Ireland
| |
Collapse
|
34
|
Xie XY, Xiao P, Fang WH, Cui G, Thiel W. Probing Photocatalytic Nitrogen Reduction to Ammonia with Water on the Rutile TiO2 (110) Surface by First-Principles Calculations. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01551] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiao-Ying Xie
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, People’s Republic of China
| | - Pin Xiao
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, People’s Republic of China
| | - Wei-Hai Fang
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, People’s Republic of China
| | - Ganglong Cui
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, People’s Republic of China
| | - Walter Thiel
- Max-Planck, Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| |
Collapse
|
35
|
Zhou X, Dong H. A Theoretical Perspective on Charge Separation and Transfer in Metal Oxide Photocatalysts for Water Splitting. ChemCatChem 2019. [DOI: 10.1002/cctc.201900567] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Xin Zhou
- College of Environment and Chemical EngineeringDalian University No. 10 Xuefu Street Dalian Economic Technological Development Zone Dalian 116622, Liaoning P.R. China
| | - Hao Dong
- School of Chemistry and Chemical EngineeringLiaoning Normal University No. 850 Huanghe Road Shahekou District Dalian 116029, Liaoning P.R. China
| |
Collapse
|
36
|
Wang D, Wang CM, Yang G, Du YJ, Yang WM. First-principles kinetic study on benzene alkylation with ethanol vs. ethylene in H-ZSM-5. J Catal 2019. [DOI: 10.1016/j.jcat.2019.04.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
37
|
Wang L, Cao S, Guo K, Wu Z, Ma Z, Piao L. Simultaneous hydrogen and peroxide production by photocatalytic water splitting. CHINESE JOURNAL OF CATALYSIS 2019. [DOI: 10.1016/s1872-2067(19)63274-2] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
38
|
Wang Z, Yang X, Yang T, Zhao Y, Wang F, Chen Y, Zeng JH, Yan C, Huang F, Jiang JX. Dibenzothiophene Dioxide Based Conjugated Microporous Polymers for Visible-Light-Driven Hydrogen Production. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02607] [Citation(s) in RCA: 150] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zijian Wang
- Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an, Shaanxi 710062, P. R. China
| | - Xiye Yang
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510641, China
| | - Tongjia Yang
- Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an, Shaanxi 710062, P. R. China
| | - Yongbo Zhao
- Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an, Shaanxi 710062, P. R. China
| | - Feng Wang
- Key Laboratory for Green Chemical Process of Ministry of Education, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430073, P. R. China
| | - Yu Chen
- Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an, Shaanxi 710062, P. R. China
| | - Jing Hui Zeng
- Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an, Shaanxi 710062, P. R. China
| | - Chao Yan
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Jiangsu, Zhenjiang 212003, China
| | - Fei Huang
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510641, China
| | - Jia-Xing Jiang
- Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an, Shaanxi 710062, P. R. China
| |
Collapse
|
39
|
Kim DJ, Jo WK. Mitigation of harmful indoor organic vapors using plug-flow unit coated with 2D g-C 3N 4 and metallic Cu dual-incorporated 1D titania heterostructure. CHEMOSPHERE 2018; 202:184-190. [PMID: 29571138 DOI: 10.1016/j.chemosphere.2018.03.089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 03/08/2018] [Accepted: 03/13/2018] [Indexed: 06/08/2023]
Abstract
Herein, a plug-flow reactor coated with one-dimensional (1D) TiO2 nanotube (TNT) heterostructures incorporated with g-C3N4 (CN) and metallic Cu (CN/Cu/TNT) nanocomposite and irradiated by a daylight lamp was newly applied for the mitigation of harmful indoor organic vapors. The CN/Cu/TNT catalyst showed high mitigation efficiency for all target pollutants, followed by Cu-incorporated TNT (Cu/TNT), CN-incorporated TNT (CN/TNT), TNT, and TiO2, in that order. The order of their photocatalytic activities agrees with that of the electron‒hole separation rates determined from their photoluminescence emission spectra. The mitigation efficiency of the CN/Cu/TNT catalyst increased as the CN-to-Cu/TNT percentage was increased from 1% to 10%, but subsequently decreased as the CN-to-Cu/TNT percentage increased to 20%. The mitigation efficiencies of the CN/Cu/TNT catalyst decreased with increasing relative humidity, feed pollutant concentrations, and airstream flow rates. However, in most cases, the reaction rates of the target compounds increased when the feed concentration was increased from 1 to 5 ppm. The mineralization rates of all target pollutants were lower than the corresponding photocatalytic mitigation rates, which could be ascribed to the production of CO and organic intermediates observed during the photocatalysis of the target pollutants. Nevertheless, the intermediates formed during the photocatalytic mitigation process would not cause significant adverse health effects to building occupants, because their concentrations were far below their exposure or threshold limit values. A probable mechanism for the photocatalytic mitigation of the organic vapors by the CN/Cu/TNT catalyst under daylight illumination was also proposed.
Collapse
Affiliation(s)
- Dong Jin Kim
- Department of Environmental Engineering, Kyungpook National University, Daegu, 702-701, South Korea
| | - Wan-Kuen Jo
- Department of Environmental Engineering, Kyungpook National University, Daegu, 702-701, South Korea.
| |
Collapse
|
40
|
Wang D, Liu ZP, Yang WM. Revealing the Size Effect of Platinum Cocatalyst for Photocatalytic Hydrogen Evolution on TiO2 Support: A DFT Study. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01886] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dong Wang
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, SINOPEC Shanghai Research Institute of Petrochemical Technology, Shanghai 201208, China
- Collaborative Innovation Center of Chemistry for Energy Material, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Key Laboratory of Computational Physical Science (Ministry of Education), Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Zhi-Pan Liu
- Collaborative Innovation Center of Chemistry for Energy Material, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Key Laboratory of Computational Physical Science (Ministry of Education), Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Wei-Min Yang
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, SINOPEC Shanghai Research Institute of Petrochemical Technology, Shanghai 201208, China
| |
Collapse
|
41
|
Yang T, Yu Q, Wang H. Photocatalytic Reduction of CO2 to CH3OH Coupling with the Oxidation of Amine to Imine. Catal Letters 2018. [DOI: 10.1007/s10562-018-2412-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
42
|
Spanu D, Recchia S, Mohajernia S, Tomanec O, Kment Š, Zboril R, Schmuki P, Altomare M. Templated Dewetting–Alloying of NiCu Bilayers on TiO2 Nanotubes Enables Efficient Noble-Metal-Free Photocatalytic H2 Evolution. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01190] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Davide Spanu
- Department of Materials Science and Engineering WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany
- Department of Science and High Technology, University of Insubria, via Valleggio 11, 22100 Como, Italy
| | - Sandro Recchia
- Department of Science and High Technology, University of Insubria, via Valleggio 11, 22100 Como, Italy
| | - Shiva Mohajernia
- Department of Materials Science and Engineering WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany
| | - Ondřej Tomanec
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University, Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Štěpán Kment
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University, Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Radek Zboril
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University, Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Patrik Schmuki
- Department of Materials Science and Engineering WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University, Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
- Chemistry Department, Faculty of Sciences, King Abdulaziz University, 80203 Jeddah, Saudi Arabia Kingdom
| | - Marco Altomare
- Department of Materials Science and Engineering WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany
| |
Collapse
|
43
|
|