Journal article Composition- and structure-tunable CoNiFe hydroxide nanostructures toward enhanced oxygen evolution reaction
Zihan Zhang (author) (Search by this author)
;
Xingxin Jiang (author) (Search by this author)
; ORCID SAMURAI ;
Jizhen Zhang (author) (Search by this author)
ORCID https://orcid.org/0000-0002-9584-9554 (unauthenticated)
ORCID ;
Emmanuel Picheau (author) (Search by this author)
; ORCID SAMURAI ; ORCID SAMURAI ; ORCID SAMURAI
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Zihan Zhang, Xingxin Jiang, Nattapol Ma, Jizhen Zhang, Emmanuel Picheau, Nobuyuki Sakai, Takayoshi Sasaki, Renzhi Ma. Composition- and structure-tunable CoNiFe hydroxide nanostructures toward enhanced oxygen evolution reaction. Nanoscale. 2026, 18 (25), 13397-13408. https://doi.org/10.1039/d6nr00271d

Description:

(abstract)

Electrocatalytic performance of transition-metal layered double hydroxides (LDHs) can be substantially enhanced through compositional and structural engineering. Herein, ternary (CoNiFe) hydroxide nanocones featuring mixed tetrahedral (Td) and octahedral (Oh) coordination are rationally designed to boost oxygen evolution reaction (OER) activity. Binary CoNi hydroxide nanocones with mixed coordination are first synthesized, among which a Co:Ni ratio of 3:1 exhibits optimal performance with an overpotential of 339 mV at 10 mA cm−2. Subsequent Fe incorporation, followed by a topochemical oxidative intercalation process, convert the CoNiFe(II) hydroxides into CoNiFe(III) LDHs while retaining mixed Td/Oh coordination. Benefiting from the synergistic effects of multimetal composition and coordination modulation, the resulting
Co3Ni1Fe1 LDH nanocones achieve a markedly reduced overpotential of 280 mV. Furthermore, exfoliation into monolayer nanosheets leads to a further enhancement in catalytic activity by increasing exposure of accessible active sites, ultimately lowering the overpotential to 267 mV. This study highlights an effective strategy that integrates compositional optimization, coordination engineering, and structural modulation for the development of high-performance LDH electrocatalysts.

Rights:

Keyword: Metal hydroxide, Nanostructures, Oxygen evolution reaction, Electrocatalysis

Date published: 2026-05-12

Publisher: Royal Society of Chemistry (RSC)

Journal:

  • Nanoscale (ISSN: 20403364) vol. 18 issue. 25 p. 13397-13408

Funding:

  • Ministry of Education, Culture, Sports, Science and Technology
  • National Institute for Materials Science
  • Japan Society for the Promotion of Science 22H01916
  • Japan Society for the Promotion of Science 22K18956
  • Japan Society for the Promotion of Science 24KF0273
  • Japan Society for the Promotion of Science 25K22208
  • Japan Society for the Promotion of Science 26H02227

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1039/d6nr00271d

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Updated at: 2026-07-03 10:04:11 +0900

Published on MDR: 2026-07-03 12:30:34 +0900

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