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Probing the enhanced methanol electrooxidation mechanism on platinum-metal oxide catalyst

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journal contribution
posted on 11.08.2020, 09:27 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.

Funding

NSFC (Grant No. 21733004) of MOST

International Cooperation Program of STCSM (Grant No. 17520711200)

National Basic Research Program of China (973 Program, 2015CB932303)

Low Cost High Performance Novel Catalysts for Direct Alcohol Alkaline Fuel Cells using anion exchange membrane and bio-fuels

Engineering and Physical Sciences Research Council

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Newton Fund (NAF\R1\191294)

Shanghai Sailing Program (Grant No. 20YF1420500)

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Published in

Applied Catalysis B: Environmental

Volume

280

Publisher

Elsevier BV

Version

AM (Accepted Manuscript)

Rights holder

© Elsevier

Publisher statement

This paper was accepted for publication in the journal Applied Catalysis B: Environmental and the definitive published version is available at https://doi.org/10.1016/j.apcatb.2020.119393

Acceptance date

03/08/2020

Publication date

2020-08-06

Copyright date

2020

ISSN

0926-3373

Language

en

Depositor

Prof Wen Feng Lin Deposit date: 7 August 2020

Article number

119393