Cooperation between Dual Metal Atoms and Nanoclusters Enhances Activity and Stability for Oxygen Reduction and Evolution

Zhe Wang, Xiaoyan Jin, Ruojie Xu, Zhenbei Yang, Shidong Ma, Tao Yan, Chao Zhu, Jian Fang, Yipu Liu, Seong Ju Hwang, Zhijuan Pan, Hong Jin Fan

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

We have achieved the synthesis of dual-metal single atoms and atomic clusters that co-anchor on a highly graphitic carbon support. The catalyst comprises Ni4 (and Fe4) nanoclusters located adjacent to the corresponding NiN4 (and FeN4) single-atom sites, which is verified by systematic X-ray absorption characterization and density functional theory calculations. A distinct cooperation between Fe4 (Ni4) nanoclusters and the corresponding FeN4 (NiN4) atomic sites optimizes the adsorption energy of reaction intermediates and reduces the energy barrier of the potential-determining steps. This catalyst exhibits enhanced oxygen reduction and evolution activity and long-cycle stability compared to counterparts without nanoclusters and commercial Pt/C. The fabricated Zn-air batteries deliver a high power density and long-term cyclability, demonstrating their prospects in energy storage device applications.

Original languageEnglish
Pages (from-to)8622-8633
Number of pages12
JournalACS Nano
Volume17
Issue number9
DOIs
StatePublished - 9 May 2023

Keywords

  • bifunctional catalysts
  • cooperation effect
  • dual single atoms
  • nanocluster
  • oxygen reduction reaction
  • zinc air battery

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