High Catalytic Performance of Au/Bi2Ofor Preferential Oxidation of CO in H2

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Jing Chen
  • Changlai Wang
  • Cichang Zong
  • Shi Chen
  • Pengcheng Wang
  • And 1 others
  • Qianwang Chen

Detail(s)

Original languageEnglish
Pages (from-to)29532–29540
Journal / PublicationACS Applied Materials and Interfaces
Volume13
Issue number25
Online published16 Jun 2021
Publication statusPublished - 30 Jun 2021

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.

Research Area(s)

  • bismuth, carbon monoxide, density functional calculations, gold, heterogeneous catalysis

Citation Format(s)

High Catalytic Performance of Au/Bi2Ofor Preferential Oxidation of CO in H2. / Chen, Jing; Wang, Changlai; Zong, Cichang; Chen, Shi; Wang, Pengcheng; Chen, Qianwang.

In: ACS Applied Materials and Interfaces, Vol. 13, No. 25, 30.06.2021, p. 29532–29540.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review