MoS2 nanoflower supported Pt nanoparticle as an efficient electrocatalyst for ethanol oxidation reaction |
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| Affiliation: | 1. Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, China;2. Department of Physics and Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen University, Xiamen, 361005, China;3. State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;4. School of Energy and Chemical Engineering, Center for Multidimensional Carbon Materials, Institute for Basic Science, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea;1. Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan;2. Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan;1. Instituto de Pesquisas Energéticas e Nucleares, IPEN/CNEN, Centro de Células a Combustível e Hidrogênio, São Paulo, CEP 05508-000, Brazil;2. Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin, Campinas, CEP 13083-859, Brazil;1. Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, PR China;2. The Institute of Dongguan-Tongji University, Dongguan, Guangdong, 523808, PR China;1. Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, 14850, USA;2. Universidade Federal do Triângulo Mineiro, Campus Universitário de Iturama, Iturama, MG, 38280-000, Brazil;3. Departamento de Química, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, 14040-901, Brazil |
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| Abstract: | Developing highly active and stable ethanol oxidation electrocatalysts is crucial for direct ethanol fuel cells. Herein, platinum/molybdenum disulfide nanoflower (Pt/MoS2) nanocomposite is synthesized through a facile method and is first applied as catalyst for ethanol oxidation reaction. In situ electrochemical nuclear magnetic resonance is carried out to investigate the electrocatalytic activity of Pt/MoS2 and the detailed mechanism of ethanol oxidation reaction. Experimental results indicate that in situ electrochemical nuclear magnetic resonance possesses great advantages for real-time investigation of ethanol oxidation reaction, and Pt/MoS2 is found to exhibit better electrocatalytic performances in terms of higher current density, better stability, and stronger anti-poisoning activity compared to commercial Pt/C and pure Pt catalysts in acid electrolyte, suggesting its potential for application in direct ethanol fuel cells. Density functional theory calculations indicate that MoS2-supported Pt atom has a smaller energy barrier for the dissociation of ethanol compared to those of Pt and C-supported Pt atom, leading to the enhancement of catalytic activity. This work reveals the importance of the supporting materials for high performance direct ethanol fuel cells catalysts. |
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| Keywords: | Ethanol oxidation reaction Density functional theory calculations In situ electrochemical NMR |
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