Probing the enhanced methanol electrooxidation mechanism on platinum-metal oxide catalyst
journal contributionposted on 11.08.2020, 09:27 authored by Ya-Wei Zhou, Ya-Feng Chen, Kun Jiang, Zhen Liu, Zi-Jie Mao, Wei-Yi Zhang, Wen-Feng LinWen-Feng Lin, Wen-Bin Cai
Pt-metal oxide nanocomposites are classified as an alternative promising catalyst besides Pt-Ru nanoalloys for electrochemical methanol oxidation reaction (MOR), and yet the relevant enhancement mechanism for MOR remains largely elusive in terms of catalyst functions and reaction pathways. Herein, interface-rich Pt-SnO2 nanoflakes supported on reduced graphene oxide have been prepared and employed as a model catalyst for such a study. X-ray photoelectron spectroscopy and X-ray absorption spectroscopy measurements reveal significant electronic structure modification on Pt in contact with SnO2, concomitant with enhanced MOR. In-situ surface enhanced infrared absorption spectroscopy and on-line differential electrochemical mass spectrometry measurements indicate that the non-CO pathway is selectively enhanced on Pt-SnO2 compared to the CO pathway which prevails on Pt. DFT calculations reinforce that this electronic structure manipulation favors the non-CO reaction pathway on Pt-SnO2.
Low Cost High Performance Novel Catalysts for Direct Alcohol Alkaline Fuel Cells using anion exchange membrane and bio-fuels
Engineering and Physical Sciences Research CouncilFind out more...
NSFC (Grant No. 21733004) of MOST
International Cooperation Program of STCSM (Grant No. 17520711200)
National Basic Research Program of China (973 Program, 2015CB932303)
Newton Fund (NAF\R1\191294)
Shanghai Sailing Program (Grant No. 20YF1420500)
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