Valence states of single Au atoms dictate the catalytic activity of Au1/CeO2(100)

Rui Liu; Weiye Qu; Xiaolei Hu; Junxiao Chen; Yangyang Dong; Dongrun Xu; Jing Liu; Zhen Ma; Xingfu Tang

doi:10.1039/d2cc04219c

Valence states of single Au atoms dictate the catalytic activity of Au₁/CeO₂(100)

Chem Commun (Camb). 2022 Oct 13;58(82):11587-11590. doi: 10.1039/d2cc04219c.

Authors

Rui Liu¹, Weiye Qu¹, Xiaolei Hu¹, Junxiao Chen¹, Yangyang Dong¹, Dongrun Xu¹, Jing Liu¹, Zhen Ma^{1

2}, Xingfu Tang^{1

3

2}

Affiliations

¹ Department of Environmental Science & Engineering, Fudan University, 2005 Songhu Road, Shanghai 200438, China. tangxf@fudan.edu.cn.
² Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
³ Jiangsu Collaborative Innovation Center of Atmospheric Environment & Equipment Technology, Nanjing University of Information Science & Technology, Nanjing 210044, China.

PMID: 36168912
DOI: 10.1039/d2cc04219c

Abstract

We tune the valence state of single Au atoms anchored on CeO₂(100) by treating the catalyst in H₂ at different temperatures and obtain a series of Au₁/CeO₂(100). The transition from Au₁^+0.9 to Au₁^+0.3 leads to an enhancement of the CO oxidation activity of Au₁/CeO₂(100) by one order of magnitude. This work is of significance for an in-depth understanding of reaction mechanisms and rational design of high-performance catalysts.