1
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Gao W, Shi L, Hou W, Ding C, Liu Q, Long R, Chi H, Zhang Y, Xu X, Ma X, Tang Z, Yang Y, Wang X, Shen Q, Xiong Y, Wang J, Zou Z, Zhou Y. Tandem Synergistic Effect of Cu-In Dual Sites Confined on the Edge of Monolayer CuInP 2 S 6 toward Selective Photoreduction of CO 2 into Multi-Carbon Solar Fuels. Angew Chem Int Ed Engl 2024; 63:e202317852. [PMID: 38141033 DOI: 10.1002/anie.202317852] [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: 11/22/2023] [Revised: 12/21/2023] [Accepted: 12/22/2023] [Indexed: 12/24/2023]
Abstract
One-unit-cell, single-crystal, hexagonal CuInP2 S6 atomically thin sheets of≈0.81 nm in thickness was successfully synthesized for photocatalytic reduction of CO2 . Exciting ethene (C2 H4 ) as the main product was dominantly generated with the yield-based selectivity reaching ≈56.4 %, and the electron-based selectivity as high as ≈74.6 %. The tandem synergistic effect of charge-enriched Cu-In dual sites confined on the lateral edge of the CuInP2 S6 monolayer (ML) is mainly responsible for efficient conversion and high selectivity of the C2 H4 product as the basal surface site of the ML, exposing S atoms, can not derive the CO2 photoreduction due to the high energy barrier for the proton-coupled electron transfer of CO2 into *COOH. The marginal In site of the ML preeminently targets CO2 conversion to *CO under light illumination, and the *CO then migrates to the neighbor Cu sites for the subsequent C-C coupling reaction into C2 H4 with thermodynamic and kinetic feasibility. Moreover, ultrathin structure of the ML also allows to shorten the transfer distance of charge carriers from the interior onto the surface, thus inhibiting electron-hole recombination and enabling more electrons to survive and accumulate on the exposed active sites for CO2 reduction.
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Affiliation(s)
- Wa Gao
- School of Physical Science and Technology, Tiangong University, Tianjin, 300387, P. R. China
- School of Physics, Jiangsu Key Laboratory of Nanotechnology, Eco-materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China
| | - Li Shi
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing, 210023, P. R. China
| | - Wentao Hou
- School of Physics, Jiangsu Key Laboratory of Nanotechnology, Eco-materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China
| | - Cheng Ding
- School of Physics, Jiangsu Key Laboratory of Nanotechnology, Eco-materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China
| | - Qi Liu
- School of Chemical and Environmental Engineering, School of Materials and Engineering, Anhui Polytechnic University, Wuhu, 241000, P. R. China
| | - Ran Long
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230036, Anhui, P. R. China
| | - Haoqiang Chi
- School of Physics, Jiangsu Key Laboratory of Nanotechnology, Eco-materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China
| | - Yongcai Zhang
- Chemistry Interdisciplinary Research Center, School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225009, P. R. China
| | - Xiaoyong Xu
- Chemistry Interdisciplinary Research Center, School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225009, P. R. China
| | - Xueying Ma
- School of Physics, Jiangsu Key Laboratory of Nanotechnology, Eco-materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China
| | - Zheng Tang
- Key Laboratory of Soft Chemistry and Functional Materials (MOE), Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Yong Yang
- Key Laboratory of Soft Chemistry and Functional Materials (MOE), Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Xiaoyong Wang
- School of Physics, Jiangsu Key Laboratory of Nanotechnology, Eco-materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China
| | - Qing Shen
- Graduate School of Informatics and Engineering, University of Electrocommunication, 1-5-1 Chofugaoka, Chofu, Tokyo 1828585, Japan
| | - Yujie Xiong
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230036, Anhui, P. R. China
| | - Jinlan Wang
- School of Physics, Southeast University, Nanjing, 211189, Jiangsu, P. R. China
| | - Zhigang Zou
- School of Chemical and Environmental Engineering, School of Materials and Engineering, Anhui Polytechnic University, Wuhu, 241000, P. R. China
- School of Physics, Jiangsu Key Laboratory of Nanotechnology, Eco-materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China
- School of Science and Engineering, The Chinese University of Hongkong (Shenzhen), Shenzhen, Guangdong 518172, P. R. China
| | - Yong Zhou
- School of Chemical and Environmental Engineering, School of Materials and Engineering, Anhui Polytechnic University, Wuhu, 241000, P. R. China
- School of Physics, Jiangsu Key Laboratory of Nanotechnology, Eco-materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China
- School of Science and Engineering, The Chinese University of Hongkong (Shenzhen), Shenzhen, Guangdong 518172, P. R. China
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2
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Qin J, Yang J, Huang H, Fu M, Ye D, Hu Y. Tuning the Hierarchical Pore Structure and the Metal Site in a Metal-Organic Framework Derivative to Unravel the Mechanism for the Adsorption of Different Volatile Organic Compounds. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:15703-15714. [PMID: 37796655 DOI: 10.1021/acs.est.3c03467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/07/2023]
Abstract
Volatile organic compounds (VOCs) are one of the main classes of air pollutants, and it is important to develop efficient adsorbents to remove them from the atmosphere. To do this most efficiently, we need to understand the mechanism of VOC adsorption. In this work, we described how the metal organic framework (MOF), ZIF-8, was used as a precursor to generate MOF derivatives (Zn-GC) through temperature-controlled calcination, which had adjustable metal sites and hierarchical pore structure. It was used as a model adsorbent to study the adsorption and desorption characteristics of different VOCs. Zn-GC-850 with developed pores exhibited higher adsorption performance for the benzene series, whereas Zn-GC-650 with more metal sites had a better adsorption capacity for oxygen-containing VOCs. By tuning the molecular structure of the VOCs, we revealed the adsorption mechanism of different VOCs at the molecular level. The more developed hierarchical pore structure obtained at the higher temperature facilitates the diffusion of the benzene series, and the noncovalent interaction between their methyl group(s) and the carbonized MOF derivatives improves the adsorption affinity; while the higher exposure of Zn sites obtained at lower temperature favors the adsorption of oxygen-containing VOCs by Zn-O bonds. The mass transfers of VOCs and the role of the adsorbent were simulated by multiple theoretical models. This study strengthens the basis for the design and optimization of the adsorbent and catalyst for VOCs treatment.
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Affiliation(s)
- Junxian Qin
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China
| | - Junjie Yang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China
| | - Haomin Huang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, P. R. China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, P. R. China
| | - Mingli Fu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, P. R. China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, P. R. China
| | - Daiqi Ye
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, P. R. China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, P. R. China
| | - Yun Hu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, P. R. China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, P. R. China
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3
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Sustainable methane utilization technology via photocatalytic halogenation with alkali halides. Nat Commun 2023; 14:1410. [PMID: 36918590 PMCID: PMC10014990 DOI: 10.1038/s41467-023-36977-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 02/24/2023] [Indexed: 03/15/2023] Open
Abstract
Methyl halides are versatile platform molecules, which have been widely adopted as precursors for producing value-added chemicals and fuels. Despite their high importance, the green and economical synthesis of the methyl halides remains challenging. Here we demonstrate sustainable and efficient photocatalytic methane halogenation for methyl halide production over copper-doped titania using alkali halides as a widely available and noncorrosive halogenation agent. This approach affords a methyl halide production rate of up to 0.61 mmol h-1 m-2 for chloromethane or 1.08 mmol h-1 m-2 for bromomethane with a stability of 28 h, which are further proven transformable to methanol and pharmaceutical intermediates. Furthermore, we demonstrate that such a reaction can also operate solely using seawater and methane as resources, showing its high practicability as general technology for offshore methane exploitation. This work opens an avenue for the sustainable utilization of methane from various resources and toward designated applications.
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4
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Maqbool Q, Yigit N, Stöger-Pollach M, Ruello ML, Tittarelli F, Rupprechter G. Operando monitoring of a room temperature nanocomposite methanol sensor. Catal Sci Technol 2023; 13:624-636. [PMID: 36760342 PMCID: PMC9900598 DOI: 10.1039/d2cy01395a] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 12/13/2022] [Indexed: 12/15/2022]
Abstract
The sensing of volatile organic compounds by composites containing metal oxide semiconductors is typically explained via adsorption-desorption and surface electrochemical reactions changing the sensor's resistance. The analysis of molecular processes on chemiresistive gas sensors is often based on indirect evidence, whereas in situ or operando studies monitoring the gas/surface interactions enable a direct insight. Here we report a cross-disciplinary approach employing spectroscopy of working sensors to investigate room temperature methanol detection, contrasting well-characterized nanocomposite (TiO2@rGO-NC) and reduced-graphene oxide (rGO) sensors. Methanol interactions with the sensors were examined by (quasi) operando-DRIFTS and in situ-ATR-FTIR spectroscopy, the first paralleled by simultaneous measurements of resistance. The sensing mechanism was also studied by mass spectroscopy (MS), revealing the surface electrochemical reactions. The operando and in situ spectroscopy techniques demonstrated that the sensing mechanism on the nanocomposite relies on the combined effect of methanol reversible physisorption and irreversible chemisorption, sensor modification over time, and electron/O2 depletion-restoration due to a surface electrochemical reaction forming CO2 and H2O.
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Affiliation(s)
- Qaisar Maqbool
- Department of Materials, Environmental Sciences and Urban Planning (SIMAU), Università Politecnica delle Marche INSTM Research Unit, via Brecce Bianche 12 60131 Ancona Italy
| | - Nevzat Yigit
- Institute of Materials Chemistry TU Wien, Getreidemarkt 9/BC A-1060 Vienna Austria
| | - Michael Stöger-Pollach
- University Service Center for Transmission Electron Microscopy TU Wien, Wiedner Hauptstr. 8-10 1040 Vienna Austria
| | - Maria Letizia Ruello
- Department of Materials, Environmental Sciences and Urban Planning (SIMAU), Università Politecnica delle Marche INSTM Research Unit, via Brecce Bianche 12 60131 Ancona Italy
| | - Francesca Tittarelli
- Department of Materials, Environmental Sciences and Urban Planning (SIMAU), Università Politecnica delle Marche INSTM Research Unit, via Brecce Bianche 12 60131 Ancona Italy
| | - Günther Rupprechter
- Institute of Materials Chemistry TU Wien, Getreidemarkt 9/BC A-1060 Vienna Austria
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5
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Liu Y, Chen Y, Jiang W, Kong T, Camargo PHC, Gao C, Xiong Y. Highly Efficient and Selective Photocatalytic Nonoxidative Coupling of Methane to Ethylene over Pd-Zn Synergistic Catalytic Sites. RESEARCH 2022; 2022:9831340. [DOI: 10.34133/2022/9831340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 10/10/2022] [Indexed: 11/11/2022]
Abstract
Photocatalytic nonoxidative coupling of CH4 to multicarbon (C2+) hydrocarbons (e.g., C2H4) and H2 under ambient conditions provides a promising energy-conserving approach for utilization of carbon resource. However, as the methyl intermediates prefer to undergo self-coupling to produce ethane, it is a challenging task to control the selective conversion of CH4 to higher value-added C2H4. Herein, we adopt a synergistic catalysis strategy by integrating Pd-Zn active sites on visible light-responsive defective WO3 nanosheets for synergizing the adsorption, activation, and dehydrogenation processes in CH4 to C2H4 conversion. Benefiting from the synergy, our model catalyst achieves a remarkable C2+ compounds yield of 31.85 μmol·g-1·h-1 with an exceptionally high C2H4 selectivity of 75.3% and a stoichiometric H2 evolution. In situ spectroscopic studies reveal that the Zn sites promote the adsorption and activation of CH4 molecules to generate methyl and methoxy intermediates with the assistance of lattice oxygen, while the Pd sites facilitate the dehydrogenation of methoxy to methylene radicals for producing C2H4 and suppress overoxidation. This work demonstrates a strategy for designing efficient photocatalysts toward selective coupling of CH4 to higher value-added chemicals and highlights the importance of synergistic active sites to the synergy of key steps in catalytic reactions.
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Affiliation(s)
- Yanduo Liu
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
- Institute of Energy Hefei Comprehensive National Science Center, Hefei, Anhui 230031, China
| | - Yihong Chen
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Wenbin Jiang
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Tingting Kong
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | | | - Chao Gao
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yujie Xiong
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
- Institute of Energy Hefei Comprehensive National Science Center, Hefei, Anhui 230031, China
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Engineering Research Center of Carbon Neutrality, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
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6
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Sun Y, Wu J, Wang Y, Li J, Wang N, Harding J, Mo S, Chen L, Chen P, Fu M, Ye D, Huang J, Tu X. Plasma-Catalytic CO 2 Hydrogenation over a Pd/ZnO Catalyst: In Situ Probing of Gas-Phase and Surface Reactions. JACS AU 2022; 2:1800-1810. [PMID: 36032530 PMCID: PMC9400056 DOI: 10.1021/jacsau.2c00028] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Plasma-catalytic CO2 hydrogenation is a complex chemical process combining plasma-assisted gas-phase and surface reactions. Herein, we investigated CO2 hydrogenation over Pd/ZnO and ZnO in a tubular dielectric barrier discharge (DBD) reactor at ambient pressure. Compared to the CO2 hydrogenation using Plasma Only or Plasma + ZnO, placing Pd/ZnO in the DBD almost doubled the conversion of CO2 (36.7%) and CO yield (35.5%). The reaction pathways in the plasma-enhanced catalytic hydrogenation of CO2 were investigated by in situ Fourier transform infrared (FTIR) spectroscopy using a novel integrated in situ DBD/FTIR gas cell reactor, combined with online mass spectrometry (MS) analysis, kinetic analysis, and emission spectroscopic measurements. In plasma CO2 hydrogenation over Pd/ZnO, the hydrogenation of adsorbed surface CO2 on Pd/ZnO is the dominant reaction route for the enhanced CO2 conversion, which can be ascribed to the generation of a ZnO x overlay as a result of the strong metal-support interactions (SMSI) at the Pd-ZnO interface and the presence of abundant H species at the surface of Pd/ZnO; however, this important surface reaction can be limited in the Plasma + ZnO system due to a lack of active H species present on the ZnO surface and the absence of the SMSI. Instead, CO2 splitting to CO, both in the plasma gas phase and on the surface of ZnO, is believed to make an important contribution to the conversion of CO2 in the Plasma + ZnO system.
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Affiliation(s)
- Yuhai Sun
- Guangdong
Provincial Key Laboratory of Atmospheric Environment and Pollution
Control, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
- School
of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
- International
Science and Technology Cooperation Platform for Low-Carbon Recycling
of Waste and Green Development, Zhejiang
Gongshang University, Hangzhou 310012, China
| | - Junliang Wu
- Guangdong
Provincial Key Laboratory of Atmospheric Environment and Pollution
Control, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
- National
Engineering Laboratory for VOCs Pollution Control Technology and Equipment, South China University of Technology, Guangzhou 510006, China
| | - Yaolin Wang
- Department
of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, U.K.
| | - Jingjing Li
- Guangdong
Provincial Key Laboratory of Atmospheric Environment and Pollution
Control, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Ni Wang
- Department
of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, U.K.
| | - Jonathan Harding
- Department
of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, U.K.
| | - Shengpeng Mo
- Guangdong
Provincial Key Laboratory of Atmospheric Environment and Pollution
Control, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Limin Chen
- Guangdong
Provincial Key Laboratory of Atmospheric Environment and Pollution
Control, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
- National
Engineering Laboratory for VOCs Pollution Control Technology and Equipment, South China University of Technology, Guangzhou 510006, China
| | - Peirong Chen
- Guangdong
Provincial Key Laboratory of Atmospheric Environment and Pollution
Control, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
- National
Engineering Laboratory for VOCs Pollution Control Technology and Equipment, South China University of Technology, Guangzhou 510006, China
| | - Mingli Fu
- Guangdong
Provincial Key Laboratory of Atmospheric Environment and Pollution
Control, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
- National
Engineering Laboratory for VOCs Pollution Control Technology and Equipment, South China University of Technology, Guangzhou 510006, China
| | - Daiqi Ye
- Guangdong
Provincial Key Laboratory of Atmospheric Environment and Pollution
Control, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
- National
Engineering Laboratory for VOCs Pollution Control Technology and Equipment, South China University of Technology, Guangzhou 510006, China
| | - Jun Huang
- Laboratory
for Catalysis Engineering, School of Chemical and Biomolecular Engineering,
Sydney Nano Institute, The University of
Sydney, Sydney, NSW 2006, Australia
| | - Xin Tu
- Department
of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, U.K.
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7
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Guo H, Ding S, Zhang H, Wang C, Peng F, Yao S, Xiong L, Chen X. Promotion effect of iron addition on the structure and CO2 hydrogenation performance of Attapulgite/Ce0.75Zr0.25O2 nanocomposite supported Cu-ZnO based catalyst. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111820] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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8
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Wolski L, Lebedev OI, Harmer CP, Kovnir K, Abdelli H, Grzyb T, Daturi M, El-Roz M. Unraveling the Origin of Photocatalytic Deactivation in CeO 2/Nb 2O 5 Heterostructure Systems during Methanol Oxidation: Insight into the Role of Cerium Species. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2021; 125:12650-12662. [PMID: 34276865 PMCID: PMC8279704 DOI: 10.1021/acs.jpcc.1c02812] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/19/2021] [Indexed: 06/13/2023]
Abstract
The study provides deep insight into the origin of photocatalytic deactivation of Nb2O5 after modification with ceria. Of particular interest was to fully understand the role of ceria species in diminishing the photocatalytic performance of CeO2/Nb2O5 heterostructures. For this purpose, ceria was loaded on niobia surfaces by wet impregnation. The as-prepared materials were characterized by powder X-ray diffraction, nitrogen physisorption, UV-visible spectroscopy, X-ray photoelectron spectroscopy, high-resolution transmission electron microscopy, and photoluminescence measurements. Photocatalytic activity of parent metal oxides (i.e., Nb2O5 and CeO2) and as-prepared CeO2/Nb2O5 heterostructures with different ceria loadings were tested in methanol photooxidation, a model gas-phase reaction. Deep insight into the photocatalytic process provided by operando-IR techniques combined with results of photoluminescence studies revealed that deactivation of CeO2/Nb2O5 heterostructures resulted from increased recombination of photo-excited electrons and holes. The main factor contributing to more efficient recombination of the charge carriers in the heterostructures was the ultrafine size of the ceria species. The presence of such highly dispersed ceria species on the niobia surface provided a strong interface between these two semiconductors, enabling efficient charge transfer from Nb2O5 to CeO2. However, the ceria species supported on niobia exhibited a high defect site concentration, which acted as highly active recombination centers for the photo-induced charge carriers.
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Affiliation(s)
- Lukasz Wolski
- Faculty
of Chemistry, Adam Mickiewicz University, Poznań, Uniwersytetu Poznańskiego
8, Poznań 61-614, Poland
- Normandie
Univ, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, Caen 14050, France
| | - Oleg I. Lebedev
- Normandie
Univ, ENSICAEN, UNICAEN, CNRS, Laboratoire CRISMAT, Caen 14050, France
| | - Colin P. Harmer
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- U.S.
Department of Energy, Ames Laboratory, Ames, Iowa 50011, United States
| | - Kirill Kovnir
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- U.S.
Department of Energy, Ames Laboratory, Ames, Iowa 50011, United States
| | - Hanen Abdelli
- Normandie
Univ, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, Caen 14050, France
| | - Tomasz Grzyb
- Department
of Rare Earths, Faculty of Chemistry, Adam
Mickiewicz University, Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Marco Daturi
- Normandie
Univ, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, Caen 14050, France
| | - Mohamad El-Roz
- Normandie
Univ, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, Caen 14050, France
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9
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Jiang W, Low J, Mao K, Duan D, Chen S, Liu W, Pao CW, Ma J, Sang S, Shu C, Zhan X, Qi Z, Zhang H, Liu Z, Wu X, Long R, Song L, Xiong Y. Pd-Modified ZnO-Au Enabling Alkoxy Intermediates Formation and Dehydrogenation for Photocatalytic Conversion of Methane to Ethylene. J Am Chem Soc 2020; 143:269-278. [PMID: 33373209 DOI: 10.1021/jacs.0c10369] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Photocatalysis provides an intriguing approach for the conversion of methane to multicarbon (C2+) compounds under mild conditions; however, with methyl radicals as the sole reaction intermediate, the current C2+ products are dominated by ethane, with a negligible selectivity toward ethylene, which, as a key chemical feedstock, possesses higher added value than ethane. Herein, we report a direct photocatalytic methane-to-ethylene conversion pathway involving the formation and dehydrogenation of alkoxy (i.e., methoxy and ethoxy) intermediates over a Pd-modified ZnO-Au hybrid catalyst. On the basis of various in situ characterizations, it is revealed that the Pd-induced dehydrogenation capability of the catalyst holds the key to turning on the pathway. During the reaction, methane molecules are first dissociated into methoxy on the surface of ZnO under the assistance of Pd. Then these methoxy intermediates are further dehydrogenated and coupled with methyl radical into ethoxy, which can be subsequently converted into ethylene through dehydrogenation. As a result, the optimized ZnO-AuPd hybrid with atomically dispersed Pd sites in the Au lattice achieves a methane conversion of 536.0 μmol g-1 with a C2+ compound selectivity of 96.0% (39.7% C2H4 and 54.9% C2H6 in total produced C2+ compounds) after 8 h of light irradiation. This work provides fresh insight into the methane conversion pathway under mild conditions and highlights the significance of dehydrogenation for enhanced photocatalytic activity and unsaturated hydrocarbon product selectivity.
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Affiliation(s)
- Wenbin Jiang
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China.,Institute of Energy, Hefei Comprehensive National Science Center, 350 Shushanhu Road, Hefei, Anhui 230031, China
| | - Jingxiang Low
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Keke Mao
- School of Energy and Environment Science, Anhui University of Technology, Maanshan, Anhui 243032, China
| | - Delong Duan
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Shuangming Chen
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Wei Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Chih-Wen Pao
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - Jun Ma
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Shuaikang Sang
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Chang Shu
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xiaoyi Zhan
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
| | - Zeming Qi
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Hui Zhang
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
| | - Zhi Liu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201203, China.,State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
| | - Xiaojun Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Ran Long
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Li Song
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yujie Xiong
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China.,Institute of Energy, Hefei Comprehensive National Science Center, 350 Shushanhu Road, Hefei, Anhui 230031, China
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10
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Rezvani A, Abdel-Mageed AM, Ishida T, Murayama T, Parlinska-Wojtan M, Behm RJ. CO2 Reduction to Methanol on Au/CeO2 Catalysts: Mechanistic Insights from Activation/Deactivation and SSITKA Measurements. ACS Catal 2020. [DOI: 10.1021/acscatal.9b04655] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Azita Rezvani
- Institute of Surface Chemistry and Catalysis, Ulm University, Albert-Einstein-Allee 47, D-89081 Ulm, Germany
| | - Ali M. Abdel-Mageed
- Institute of Surface Chemistry and Catalysis, Ulm University, Albert-Einstein-Allee 47, D-89081 Ulm, Germany
| | - Tamao Ishida
- Research Center for Gold Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - Toru Murayama
- Research Center for Gold Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | | | - R. Jürgen Behm
- Institute of Surface Chemistry and Catalysis, Ulm University, Albert-Einstein-Allee 47, D-89081 Ulm, Germany
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11
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Dynamic changes of Au/ZnO catalysts during methanol synthesis: A model study by temporal analysis of products (TAP) and Zn LIII near Edge X-Ray absorption spectroscopy. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.11.074] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Hierarchical sheet-like Cu/Zn/Al nanocatalysts derived from LDH/MOF composites for CO2 hydrogenation to methanol. J CO2 UTIL 2019. [DOI: 10.1016/j.jcou.2019.05.021] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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Yusuf S, Neal L, Bao Z, Wu Z, Li F. Effects of Sodium and Tungsten Promoters on Mg6MnO8-Based Core–Shell Redox Catalysts for Chemical Looping—Oxidative Dehydrogenation of Ethane. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00164] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Seif Yusuf
- Department of Chemical and Biomolecular Engineering, North Carolina State University, 911 Partners Way, Raleigh, North Carolina 27695-7905, United States
| | - Luke Neal
- Department of Chemical and Biomolecular Engineering, North Carolina State University, 911 Partners Way, Raleigh, North Carolina 27695-7905, United States
| | - Zhenghong Bao
- Center for Nanophase Materials Sciences and Chemical Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Zili Wu
- Center for Nanophase Materials Sciences and Chemical Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Fanxing Li
- Department of Chemical and Biomolecular Engineering, North Carolina State University, 911 Partners Way, Raleigh, North Carolina 27695-7905, United States
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14
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Surface Probing by Spectroscopy on Titania-Supported Gold Nanoparticles for a Photoreductive Application. Catalysts 2018. [DOI: 10.3390/catal8120623] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The continuous increase in scientific reports concerning photocatalysis and in particular CO2 photoreduction in recent years reveals the high degree of interest around the topic. However, the adsorption and activation mechanisms of CO2 on TiO2, the most used photocatalyst, are poorly understood and investigated. Gold nanoparticles were prepared by a modified deposition-precipitation method using urea and a chemical reductant. Bare P25 was used as reference. Combined spectroscopic investigations of fresh and spent samples with photoactivity studies reported in this article provide new insights to the role of CO2 adsorption and carbonate formation on Au/TiO2 during CO2 photocatalytic reduction. The key intermediates’ and products’ adsorption (CO, methanol, ethanol) was studied, coupled with X-ray photoelectron microscopy (XPS) and UV-Visible spectroscopy. The adsorption of CO2 on fresh and spent catalysts changes radically considering the carbonate formation and the gold surface presence. Methanol and ethanol revealed new adsorbed species on Au with respect to bare titania. The characterisation of the spent catalysts revealed the good stability of these samples.
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15
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Yfanti VL, Lemonidou A. Mechanistic study of liquid phase glycerol hydrodeoxygenation with in-situ generated hydrogen. J Catal 2018. [DOI: 10.1016/j.jcat.2018.09.036] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Haldar KK, Biswas R, Tanwar S, Sen T, Lahtinen J. One‐Pot Synthesis of Au Embedded ZnO Nanorods Composite Heterostructures with Excellent Photocatalytic Properties. ChemistrySelect 2018. [DOI: 10.1002/slct.201801234] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Krishna Kanta Haldar
- Department of Chemical scienceSchool of Basic and Applied ScienceCentral University of Punjab 151001-Bathinda Punjab India
| | - Rathindranath Biswas
- Department of Chemical scienceSchool of Basic and Applied ScienceCentral University of Punjab 151001-Bathinda Punjab India
| | - Swati Tanwar
- Institute of Nano Science and Technology 160062- Mohali Punjab
| | - Tapasi Sen
- Institute of Nano Science and Technology 160062- Mohali Punjab
| | - Jouko Lahtinen
- Department of Applied PhysicsAalto University School of Science FI-00076 Aalto Finland
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17
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Rawal TB, Acharya SR, Hong S, Le D, Tang Y, Tao FF, Rahman TS. High Catalytic Activity of Pd1/ZnO(101̅0) toward Methanol Partial Oxidation: A DFT+KMC Study. ACS Catal 2018. [DOI: 10.1021/acscatal.7b04504] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takat B. Rawal
- Department of Physics, University of Central Florida, Orlando, Florida 32816, United States
| | - Shree Ram Acharya
- Department of Physics, University of Central Florida, Orlando, Florida 32816, United States
| | - Sampyo Hong
- Department of Physics, University of Central Florida, Orlando, Florida 32816, United States
- Division of Physical Sciences, Brewton-Parker College, Mount Vernon, Georgia 30445, United States
| | - Duy Le
- Department of Physics, University of Central Florida, Orlando, Florida 32816, United States
| | - Yu Tang
- Department of Chemical and Petroleum Engineering, and Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Franklin Feng Tao
- Department of Chemical and Petroleum Engineering, and Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Talat S. Rahman
- Department of Physics, University of Central Florida, Orlando, Florida 32816, United States
- Donostia International Physics Center, Donostia-San Sebastian 20018, Spain
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18
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Jin L, Wang Y. Surface chemistry of methanol on different ZnO surfaces studied by vibrational spectroscopy. Phys Chem Chem Phys 2018; 19:12992-13001. [PMID: 28480918 DOI: 10.1039/c7cp01715d] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The adsorption and reactions of CH3OH on nonpolar mixed-terminated ZnO(101[combining macron]0), polar O-ZnO(0001[combining macron]) and Zn-ZnO(0001) surfaces have been studied systematically using high-resolution electron energy loss spectroscopy (HREELS) in conjunction with temperature programmed desorption (TPD). For all three ZnO surfaces, exposure to methanol at room temperature leads to (partially) dissociative adsorption resulting in the formation of hydroxyl and methoxy species. Upon heating to higher temperatures, the dissociated and intact methanol species on ZnO(101[combining macron]0) predominantly undergo molecular desorption releasing CH3OH at 370 and 440 K. The Zn-O dimer vacancies are responsible for the decomposition of a small fraction of methanol yielding H2, CH2O and CO at 540 and 565 K. The interaction of methanol with polar O-ZnO and Zn-ZnO surfaces is dominated by thermal decomposition of CH3OH to produce CH2O, H2, CO, CO2 and H2O at elevated temperatures. The high chemical reactivity of both polar surfaces is related to the high abundance of different types of surface defects formed via massive restructuring. Importantly, the reconstructed Zn-ZnO surface exhibits high selectivity for hydrogen production at 520 K, which was not observed for the polar O-ZnO surface. The HREELS data revealed that this low-temperature hydrogen evolution on Zn-ZnO results from methoxy oxidation to a formate species occurring at O-terminated step-edge sites.
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Affiliation(s)
- Lanying Jin
- Department of Pharmacy, Xiamen Medical College, Xiamen, 361023, P. R. China
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19
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Zhu X, Jhang JH, Zhou C, Dagdeviren OE, Chen Z, Schwarz UD, Altman EI. Using ZnO-Cr 2O 3-ZnO heterostructures to characterize polarization penetration depth through non-polar films. Phys Chem Chem Phys 2017; 19:32492-32504. [PMID: 29188828 DOI: 10.1039/c7cp06059a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The ability to affect the surface properties of non-polar Cr2O3 films through polar ZnO(0001) and (0001[combining macron]) supports was investigated by characterizing the polarity of ZnO films grown on top of the Cr2O3 surfaces. The growth and geometric and electronic structures of the ZnO films were characterized with X-ray photoelectron spectroscopy, ultra-violet photoelectron spectroscopy, reflection high-energy electron diffraction, low-energy electron diffraction, and X-ray diffraction. The ZnO growth mode was Stranski-Krastanov, which can be attributed to the ZnO layers initially adopting a non-polar structure with a lower surface tension before transitioning to the polar bulk structure with a higher surface energy. A similar result has been reported for ZnO growth on α-Al2O3(0001), which is isostructural with Cr2O3. The polarity of the added ZnO layer was determined by examining the surface morphology following wet chemical etching with atomic force microscopy and by characterizing the surface reactivity via temperature-programmed desorption of alcohols, which strongly depends on the ZnO polarization direction. Consistent with prior work on ZnO growth on bulk Cr2O3(0001), both measurements indicate that thick Cr2O3 layers support ZnO(0001[combining macron]) growth regardless of the underlying ZnO substrate polarization; however, the polarization direction of ZnO films grown on Cr2O3 films less than three repeat units thick follows the direction of the underlying substrate polarization. These findings show that it is possible to manipulate the surface properties of non-polar materials with a polar substrate, but that the effect does not penetrate past just a couple of repeat units.
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Affiliation(s)
- Xiaodong Zhu
- Center for Research on Interface Structures and Phenomena (CRISP), Yale University, New Haven, CT 06520, USA.
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20
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Gabriel S, Scurrell MS. The Conversion of Methanol into Higher Hydrocarbons Catalyzed by Gold. ChemCatChem 2016. [DOI: 10.1002/cctc.201600727] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Sam Gabriel
- School of Chemical and Metallurgical Engineering; University of the Witwatersrand; Braamfontein Johannesburg 2025 South Africa
| | - Michael S. Scurrell
- Department of Civil and Chemical Engineering; University of South Africa, Florida; Roodepoort Johannesburg 1710 South Africa
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21
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Methanol formation by CO2 hydrogenation on Au/ZnO catalysts – Effect of total pressure and influence of CO on the reaction characteristics. J Catal 2016. [DOI: 10.1016/j.jcat.2015.11.002] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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22
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23
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Santos BAV, Loureiro JM, Ribeiro AM, Rodrigues AE, Cunha AF. Methanol production by bi-reforming. CAN J CHEM ENG 2015. [DOI: 10.1002/cjce.22068] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Bruno A. V. Santos
- Laboratory of Separation and Reaction Engineering; Department of Chemical Engineering; Faculty of Engineering; University of Porto; Rua Dr. Roberto Frias s/n; 4200-465 Porto Portugal
| | - José M. Loureiro
- Laboratory of Separation and Reaction Engineering; Department of Chemical Engineering; Faculty of Engineering; University of Porto; Rua Dr. Roberto Frias s/n; 4200-465 Porto Portugal
| | - Ana M. Ribeiro
- Laboratory of Separation and Reaction Engineering; Department of Chemical Engineering; Faculty of Engineering; University of Porto; Rua Dr. Roberto Frias s/n; 4200-465 Porto Portugal
| | - Alírio E. Rodrigues
- Laboratory of Separation and Reaction Engineering; Department of Chemical Engineering; Faculty of Engineering; University of Porto; Rua Dr. Roberto Frias s/n; 4200-465 Porto Portugal
| | - Adelino F. Cunha
- Laboratory of Separation and Reaction Engineering; Department of Chemical Engineering; Faculty of Engineering; University of Porto; Rua Dr. Roberto Frias s/n; 4200-465 Porto Portugal
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24
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The Interaction of Formic Acid with Zinc Oxide: A Combined Experimental and Theoretical Study on Single Crystal and Powder Samples. Top Catal 2015. [DOI: 10.1007/s11244-014-0356-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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25
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Lüken A, Muhler M, Strunk J. On the role of gold nanoparticles in the selective photooxidation of 2-propanol over Au/TiO2. Phys Chem Chem Phys 2015; 17:10391-7. [DOI: 10.1039/c4cp05423g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Partial insight into the reaction mechanism of the photooxidation of 2-propanol over Au/TiO2. 2-Propanol is activated by hole capture and converted to acetone requiring the presence of O2 as an electron acceptor. The deposited Au nanoparticles are assumed to facilitate the electron transfer from the TiO2 conduction band to adsorbed O2.
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Affiliation(s)
- Alexander Lüken
- Laboratory of Industrial Chemistry
- Ruhr-University Bochum
- 44801 Bochum
- Germany
| | - Martin Muhler
- Laboratory of Industrial Chemistry
- Ruhr-University Bochum
- 44801 Bochum
- Germany
| | - Jennifer Strunk
- Laboratory of Industrial Chemistry
- Ruhr-University Bochum
- 44801 Bochum
- Germany
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26
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Medford AJ, Sehested J, Rossmeisl J, Chorkendorff I, Studt F, Nørskov JK, Moses PG. Thermochemistry and micro-kinetic analysis of methanol synthesis on ZnO (0 0 0 1). J Catal 2014. [DOI: 10.1016/j.jcat.2013.10.015] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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27
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Mei B, Wiktor C, Turner S, Pougin A, van Tendeloo G, Fischer RA, Muhler M, Strunk J. Evidence for Metal–Support Interactions in Au Modified TiOx/SBA-15 Materials Prepared by Photodeposition. ACS Catal 2013. [DOI: 10.1021/cs400964k] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bastian Mei
- Department
of Chemistry and Biochemistry, Laboratory of Industrial Chemistry, Ruhr-University Bochum, Universitätsstrasse 150, 44780 Bochum, Germany
| | - Christian Wiktor
- Department
of Chemistry and Biochemistry, Inorganic Chemistry II, Ruhr-University Bochum, Universitätsstrasse 150, 44780 Bochum, Germany
- Electron
Microscopy for Materials Science (EMAT), Antwerp University, Groenenborgerlaan, 171, 2020 Antwerpen, Belgium
| | - Stuart Turner
- Electron
Microscopy for Materials Science (EMAT), Antwerp University, Groenenborgerlaan, 171, 2020 Antwerpen, Belgium
| | - Anna Pougin
- Department
of Chemistry and Biochemistry, Laboratory of Industrial Chemistry, Ruhr-University Bochum, Universitätsstrasse 150, 44780 Bochum, Germany
| | - Gustaaf van Tendeloo
- Electron
Microscopy for Materials Science (EMAT), Antwerp University, Groenenborgerlaan, 171, 2020 Antwerpen, Belgium
| | - Roland A. Fischer
- Department
of Chemistry and Biochemistry, Inorganic Chemistry II, Ruhr-University Bochum, Universitätsstrasse 150, 44780 Bochum, Germany
| | - Martin Muhler
- Department
of Chemistry and Biochemistry, Laboratory of Industrial Chemistry, Ruhr-University Bochum, Universitätsstrasse 150, 44780 Bochum, Germany
| | - Jennifer Strunk
- Department
of Chemistry and Biochemistry, Laboratory of Industrial Chemistry, Ruhr-University Bochum, Universitätsstrasse 150, 44780 Bochum, Germany
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28
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Kiss J, Frenzel J, Meyer B, Marx D. Methanol synthesis on ZnO(0001̄). II. Structure, energetics, and vibrational signature of reaction intermediates. J Chem Phys 2013; 139:044705. [DOI: 10.1063/1.4813404] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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29
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Kähler K, Holz MC, Rohe M, van Veen AC, Muhler M. Methanol oxidation as probe reaction for active sites in Au/ZnO and Au/TiO2 catalysts. J Catal 2013. [DOI: 10.1016/j.jcat.2012.12.001] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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30
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Haghofer A, Ferri D, Föttinger K, Rupprechter G. Who Is Doing the Job? Unraveling the Role of Ga2O3 in Methanol Steam Reforming on Pd2Ga/Ga2O3. ACS Catal 2012. [DOI: 10.1021/cs300480c] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andreas Haghofer
- Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9/BC,
A-1060 Vienna, Austria
| | - Davide Ferri
- Empa, Swiss Federal Laboratories for Material Science and Technology, Laboratory
for Solid State Chemistry and Catalysis, Ueberlandstr. 129, CH-8600
Dübendorf, Switzerland
| | - Karin Föttinger
- Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9/BC,
A-1060 Vienna, Austria
| | - Günther Rupprechter
- Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9/BC,
A-1060 Vienna, Austria
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31
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Low HR, Avdeev M, Ramesh K, White TJ. Zinc hydroxyapatite catalyst for decomposition of 2-propanol. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2012; 24:4175-4179. [PMID: 22714569 DOI: 10.1002/adma.201104755] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Revised: 02/22/2012] [Indexed: 06/01/2023]
Affiliation(s)
- Hou Ran Low
- School of Materials Science and Engineering, Nanyang Technological University, Singapore.
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32
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Koßmann J, Roßmüller G, Hättig C. Prediction of vibrational frequencies of possible intermediates and side products of the methanol synthesis on ZnO(0001¯) by ab initio calculations. J Chem Phys 2012; 136:034706. [DOI: 10.1063/1.3671450] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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33
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Ruther RE, Franking R, Huhn AM, Gomez-Zayas J, Hamers RJ. Formation of smooth, conformal molecular layers on ZnO surfaces via photochemical grafting. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:10604-10614. [PMID: 21777005 DOI: 10.1021/la2011265] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We have investigated the photochemical grafting of organic alkenes to atomically flat ZnO(10 ̅10) single crystals and ZnO nanorods as a way to produce functional molecule-semiconductor interfaces. Atomic force microscopy shows that photochemical grafting produces highly conformal, smooth molecular layers with no detectable changes in the underlying structure of the ZnO terraces or steps. X-ray photoelectron spectroscopy measurements show that grafting of a methyl ester-terminated alkene terminates near one monolayer, while alkenes bearing a trifluoroacetamide-protected amine form very smooth multilayers. Even with multilayers, it is possible to deprotect the amines and to link a second molecule to the surface with excellent efficiency and without significant loss of molecules from the surface. This demonstrates that the use of photochemical grafting, even in the case of multilayer formation, enables multistep chemical processes to be conducted on the ZnO surface. Photoresponse measurements demonstrate that functionalization of the surface does not affect the ability to induce field effects in the underlying ZnO, thereby suggesting that this approach to functionalization may be useful for applications in sensing and in hybrid organic-inorganic transistors and related devices.
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Affiliation(s)
- Rose E Ruther
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave, Madison, Wisconsin 53706, USA
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34
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Kiss J, Langenberg D, Silber D, Traeger F, Jin L, Qiu H, Wang Y, Meyer B, Wöll C. Combined Theoretical and Experimental Study on the Adsorption of Methanol on the ZnO(101̅0) Surface. J Phys Chem A 2011; 115:7180-8. [DOI: 10.1021/jp200146v] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. Kiss
- Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, 44780 Bochum, Germany
| | - D. Langenberg
- Lehrstuhl für Physikalische Chemie I, Ruhr-Universität Bochum, 44780 Bochum, Germany
| | - D. Silber
- Lehrstuhl für Physikalische Chemie I, Ruhr-Universität Bochum, 44780 Bochum, Germany
| | - F. Traeger
- Lehrstuhl für Physikalische Chemie I, Ruhr-Universität Bochum, 44780 Bochum, Germany
| | - L. Jin
- Lehrstuhl für Physikalische Chemie I, Ruhr-Universität Bochum, 44780 Bochum, Germany
| | - H. Qiu
- Lehrstuhl für Physikalische Chemie I, Ruhr-Universität Bochum, 44780 Bochum, Germany
| | - Y. Wang
- Lehrstuhl für Physikalische Chemie I, Ruhr-Universität Bochum, 44780 Bochum, Germany
- Lehrstuhl für Technische Chemie, Ruhr-Universität Bochum, 44780 Bochum, Germany
| | - B. Meyer
- Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, 44780 Bochum, Germany
- Interdisziplinäres Zentrum für Molekulare Materialien (ICMM) and Computer-Chemie-Centrum (CCC), Friedrich-Alexander-Universität Erlangen-Nürnberg, Nägelsbachstr. 25, 91052 Erlangen, Germany
| | - Ch. Wöll
- Lehrstuhl für Physikalische Chemie I, Ruhr-Universität Bochum, 44780 Bochum, Germany
- Institut für Funktionelle Grenzflächen (IFG), Karlsruher Institut für Technologie (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
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Kiss J, Frenzel J, Nair NN, Meyer B, Marx D. Methanol synthesis on ZnO(0001¯). III. Free energy landscapes, reaction pathways, and mechanistic insights. J Chem Phys 2011; 134:064710. [DOI: 10.1063/1.3541826] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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