articleAdvanced MaterialsApr 17, 2025Closed access

Fluorine Engineering Induces Phase Transformation in NiCo 2 O 4 for Enhanced Active Motifs Formation in Oxygen Evolution Reaction

YYYinghong YueXZXinyu ZhongMSMingzi SunJDJing DuWGWensheng Gao

Lanzhou University · Chinese Academy of Sciences · +6 more institutions

PubMed
Indexed incrossrefpubmed

Abstract

Abstract Dynamic reconstruction of catalysts is key to active site formation in alkaline oxygen evolution reaction (OER), but precise control over this process remains challenging. Herein, F‐doped NiCo 2 O 4 (NiCo 2 O 4 ‐F n ), consisting of a NiCo 2 O 4 core and a (NH 4 )Ni x Co 1−x F 3 shell is reported, which promotes the formation of a dual‐metal NiCoOOH active phase. In situ Raman and X‐ray absorption fine structure analyses reveal that the NiCoOOH, rich in oxygen vacancies (O v ), forms at 1.2 V versus the reversible hydrogen electrode (RHE) for NiCo 2 O 4 ‐F 1 , in contrast to the NiOOH phase formation at 1.4 V versus RHE for undoped NiCo 2 O 4 . This is facilitated by the transformation of (NH 4 )Ni x…

Citation impact

50
total citations
FWCI
13.98
Percentile
100%
References
75
Citations per year

Authors

11

Topics & keywords

Topics
Keywords
  • Oxygen evolution
  • Materials science
  • Oxygen
  • Fluorine
  • Amorphous solid
  • Reversible hydrogen electrode
  • Electrochemistry
  • Spinel
UN Sustainable Development Goals
  • Affordable and clean energy
No related works found for this paper.

Funding