Redirecting dynamic surface restructuring of a layered transition metal oxide catalyst for superior water oxidation

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Se-Jun Kim
  • Jiapeng Liu
  • Yang Gao
  • Subin Choi
  • Jeongwoo Han
  • Hyeyoung Shin
  • Sugeun Jo
  • Juwon Kim
  • Francesco Ciucci
  • Hwiho Kim
  • Qingtian Li
  • Wanli Yang
  • Xia Long
  • Shihe Yang
  • Sung-Pyo Cho
  • Keun Hwa Chae
  • Min Gyu Kim
  • Hyungjun Kim
  • Jongwoo Lim

Detail(s)

Original languageEnglish
Pages (from-to)212-222
Journal / PublicationNature Catalysis
Volume4
Issue number3
Online published1 Mar 2021
Publication statusPublished - Mar 2021
Externally publishedYes

Abstract

Rationally manipulating the in situ formed catalytically active surface of catalysts remains a tremendous challenge for a highly efficient water electrolysis. Here we present a cationic redox-tuning method to modulate in situ catalyst leaching and to redirect the dynamic surface restructuring of layered LiCoO2–xClx (x = 0, 0.1 or 0.2), for the electrochemical oxygen evolution reaction (OER). Chlorine doping lowered the potential to trigger in situ cobalt oxidation and lithium leaching, which induced the surface of LiCoO1.8Cl0.2 to transform into a self-terminated amorphous (oxy)hydroxide phase during the OER. In contrast, Cl-free LiCoO2 required higher electrochemical potentials to initiate the in situ surface reconstruction to spinel-type Li1±xCo2O4 and longer cycles to stabilize it. Surface-restructured LiCoO1.8Cl0.2 outperformed many state-of-the-art OER catalysts and demonstrated remarkable stability. This work makes a stride in modulating surface restructuring and in designing superior OER electrocatalysts via manipulating the in situ catalyst leaching. [Figure not available: see fulltext.].

Citation Format(s)

Redirecting dynamic surface restructuring of a layered transition metal oxide catalyst for superior water oxidation. / Wang, Jian; Kim, Se-Jun; Liu, Jiapeng et al.
In: Nature Catalysis, Vol. 4, No. 3, 03.2021, p. 212-222.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review