Anion etching for accessing rapid and deep self-reconstruction of precatalysts for water oxidation

Yang Wang, Yinlong Zhu, Shenlong Zhao, Sixuan She, Feifei Zhang, Yu Chen, Timothy Williams, Thomas Gengenbach, Lianhai Zu, Haiyan Mao, Wei Zhou, Zongping Shao, Huanting Wang, Jing Tang, Dongyuan Zhao, Cordelia Selomulya

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8 Citations (Scopus)

Abstract

Rapid and deep self-reconstruction (SELF-RECON) was achieved through rational design of the precatalyst. The obtained core-shell nanowired precatalyst (NiMoFeO@NC) consists of NiMoO4 nanoparticles (core) and NiFe/NiFeOx nanoparticles in N-doped carbons (shell). The SELF-RECON process was facilitated by rapid MoO42− dissolution in the core of NiMoFeO@NC and fast formation of NiOOH with Fe incorporation simultaneously, which was monitored and demonstrated by in situ Raman experiments. The obtained SELF-RECONCAT outperforms NiMoFeO@NC, with ultralow overpotentials and extraordinary long-term stability.

Original languageEnglish
Pages (from-to)2124-2137
Number of pages14
JournalMatter
Volume3
Issue number6
DOIs
Publication statusPublished - 2 Dec 2020

Keywords

  • anion etching
  • core-shell
  • in situ Raman spectroscopy
  • ion exchange
  • MAP2: Benchmark
  • nickel-iron oxyhydroxides
  • oxygen evolution reaction (OER)
  • Prussian blue analog (PBA)
  • SELF-RECONCAT

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