Exsolution-Dissolution of Supported Metals on High-Entropy Co3MnNiCuZnOx: Toward Sintering-Resistant Catalysis

Jiahua Zhao, Jiafeng Bao, Shize Yang, Qiang Niu, Rongyong Xie, Qiuyue Zhang, Mingshu Chen, Pengfei Zhang, Sheng Dai

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

Herein, in situ generation of CuCoNi nanoalloys over a high-entropy oxide Co3MnNiCuZnOxmatrix has been employed to generate a sintering-resistant metal-oxide interface for the CO2hydrogenation reaction. The high-entropy Co3MnNiCuZnOxcatalyst with a single reverse spinel structure was synthesized by a mechanochemical redox-based process and thermal treatment just at 600 °C. Interestingly, the entropy-driven force allows the exsolution and dissolution of CuCoNi alloys under reductive and oxidative recyles, which results in the dynamics confinement of the supported metals. With high temperature (500 °C) CO2hydrogenation as a model reaction, the restriction of CuCoNi nanoparticles over a high-entropy Co3MnNiCuZnOxmatrix guaranteed long-term thermal stability (>100 h). In comparison, binary CoMnOxas a control catalyst deactivated in 10 h. This high-entropy stabilization may inspire a number of sintering-resistant catalysts in the near future.

Original languageEnglish
Pages (from-to)12247-12257
Number of pages11
JournalACS Catalysis
Volume11
Issue number19
DOIs
StatePublished - Oct 1 2021

Keywords

  • RWGS reaction
  • high stability
  • high-entropy oxides
  • mechanochemical redox synthesis
  • transition metal

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