IrCuNi Deeply Concave Nanocubes as Highly Active Oxygen Evolution Reaction Electrocatalyst in Acid Electrolyte

Di Liu, Qingqing Lv, Siqi Lu, Jinjie Fang, Yufeng Zhang, Xingdong Wang, Yanrong Xue, Wei Zhu, Zhongbin Zhuang

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

Proton exchange membrane water electrolyzer can sustainably and environmentally friendly produce hydrogen. However, it is hindered by the lack of high-performance anode catalysts for oxygen evolution reaction (OER) in acid electrolyte. Herein, IrCuNi deeply concave nanocubes (IrCuNi DCNCs) are successfully synthesized from the selective etching of the facet of cubic nanoparticles, and they significantly boost the OER. The obtained IrCuNi DCNCs show high activity toward OER in the acidic electrolyte, which only requires an overpotential of 273 mV to achieve the OER current density of 10 mA cm-2 at a low Ir loading of 6.0 μgIr cm-2. The precious metal based mass activity is 6.6 A mgIr-1 at 1.53 V, which is 19 times as high as that of pristine Ir. It demonstrates that the outstanding catalytic performance is beneficial from the well-defined multimetal concave nanostructures, which may shed light on the fabrication of efficient water electrolyzers.

Original languageEnglish (US)
Pages (from-to)2809-2816
Number of pages8
JournalNano Letters
Volume21
Issue number7
DOIs
StatePublished - Apr 14 2021

Bibliographical note

Funding Information:
This work was financially supported by the National Natural Science Foundation of China (Grant 21671014).

Publisher Copyright:
© 2021 American Chemical Society.

Keywords

  • concave nanostructure
  • iridium
  • oxygen evolution reaction
  • water electrolyzer

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering

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