Quasi-Two-Dimensional Earth-Abundant Bimetallic Electrocatalysts for Oxygen Evolution Reactions

Yunhe Zhao, Yizhan Wang, Yutao Dong, Corey Carlos, Jun Li, Ziyi Zhang, Tong Li, Yan Shao, Shan Yan, Long Gu, Jun Wang, Xudong Wang

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

The extremely large surface area offered by quasi-two-dimensional (2D) nanostructures is a great advantage for catalytic applications. While bimetallic materials have been discovered as a group of promising catalysts for electrochemical water splitting, a facile and reliable synthesis approach toward 2D morphology to fully release its electrochemical catalytic potential is still lacking. In this work, bimetallic Co-Mo-O ultrathin nanosheets were synthesized by ionic layer epitaxy with controlled composition ratio. The Co-Mo-O nanosheets exhibited a quadrangle shape with a uniform thickness of μ2.5 nm. This 2D morphology largely enriched the surface catalytic active site ratio. Particularly, nanosheets with 2:1 Co-to-Mo ratio showed a substantially enhanced OER catalytic activity with a 3 orders of magnitude higher mass activity compared to benchmark IrO2 and RuO2 in an alkaline environment. This study introduces a promising possibility for creating high-performance electrocatalysts from 2D bimetallic materials with a high efficiency for material utilization.

Original languageEnglish
Pages (from-to)3367-3375
Number of pages9
JournalACS Energy Letters
Volume6
Issue number9
DOIs
StatePublished - 10 Sep 2021
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

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