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High Catalytic Performance of Au/Bi2O3 for Preferential Oxidation of CO in H2

  • Jing Chen
    Jing Chen
    Department of Materials Science and Engineering, Hefei National Laboratory for Physical Science at Microscale, University of Science and Technology of China, Hefei 230026, China
    More by Jing Chen
  • Changlai Wang
    Changlai Wang
    Department of Materials Science and Engineering, Hefei National Laboratory for Physical Science at Microscale, University of Science and Technology of China, Hefei 230026, China
    Department of Materials Science and Engineering, Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
  • Cichang Zong
    Cichang Zong
    Department of Materials Science and Engineering, Hefei National Laboratory for Physical Science at Microscale, University of Science and Technology of China, Hefei 230026, China
    The Anhui High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China
    More by Cichang Zong
  • Shi Chen
    Shi Chen
    Department of Materials Science and Engineering, Hefei National Laboratory for Physical Science at Microscale, University of Science and Technology of China, Hefei 230026, China
    More by Shi Chen
  • Pengcheng Wang
    Pengcheng Wang
    Department of Materials Science and Engineering, Hefei National Laboratory for Physical Science at Microscale, University of Science and Technology of China, Hefei 230026, China
  • , and 
  • Qianwang Chen*
    Qianwang Chen
    Department of Materials Science and Engineering, Hefei National Laboratory for Physical Science at Microscale, University of Science and Technology of China, Hefei 230026, China
    The Anhui High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China
    *Email: [email protected]
Cite this: ACS Appl. Mater. Interfaces 2021, 13, 25, 29532–29540
Publication Date (Web):June 16, 2021
https://doi.org/10.1021/acsami.1c04644
Copyright © 2021 American Chemical Society
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Abstract

Preferential oxidation (PROX) of CO in hydrogen is of great significance for proton exchange membrane fuel cells (PEMFCs) that need a CO-free hydrogen stream as fuel. The key technical problem is developing catalysts that can efficiently remove CO from the H2-rich stream within the working temperature range of PEMFCs. Herein, we design a Au/Bi2O3 interfacial catalyst for PROX with excellent catalytic performance, which can achieve 100% CO conversion in the PROX reaction over a wide temperature window (70–200 °C) and is perfectly compatible with the operating temperature window (80–180 °C) of PEMFCs. Moreover, the catalyst also demonstrates excellent high flow performance and long-term stability. Density functional theory (DFT) calculations reveal that the electrons transferring from Bi2O3 to Au and then to adsorbed perimeter CO and O2 molecules promote the activation of CO and O2, thus enhancing the catalytic performance of PROX.

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The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsami.1c04644.

  • Details of the Experimental Section; XRD and electron microscopy data; BET measurement data and literature data; H2-TPR profiles and overview XPS spectra; list of oxygen species and carbon species; and DFT model (PDF)

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