A new trick for an old support: Stabilizing gold single atoms on LaFeO3 perovskite

Chengcheng Tian, Haiyan Zhang, Xiang Zhu, Bo Lin, Xiaofei Liu, Hao Chen, Yafen Zhang, David R. Mullins, Carter W. Abney, Mohsen Shakouri, Roman Chernikov, Yongfeng Hu, Felipe Polo-Garzon, Zili Wu, Victor Fung, De en Jiang, Xiaoming Liu, Miaofang Chi, Jingyue Liu Jimmy, Sheng Dai

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Single-atom catalysts (SACs) have shown great potential for achieving superior catalytic activity due to maximizing metal efficiency. The key obstacle in developing SACs lies in the availability of supports that can stabilize SACs. Here we report the first successful development of single gold (Au) atom catalysts supported on high-surface-area hierarchical perovskite oxides. The resulting Au single-atoms are extremely stable at calcination temperatures up to 700 °C in air and under reaction conditions. A high catalytic activity for CO oxidation and distinct self-activating property were also achieved. Furthermore, evidenced by theoretical calculations and experimental studies including X-ray absorption fine structures and in situ Fourier-transform infrared spectra, the surface Au active sites are confirmed to be predominately positively charged. This work provides a generalizable approach to fabricating highly stable Au single-atom catalysts with tunable catalytic performance, and we anticipate that this discovery will facilitate new possibilities for the development of single atom catalysts.

Original languageEnglish (US)
Article number118178
JournalApplied Catalysis B: Environmental
Volume261
DOIs
StatePublished - Feb 2020

Keywords

  • CO oxidation
  • Gold single atoms
  • Perovskite
  • Self-activating
  • Sintering-resistance

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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