An IrRu alloy nanocactus on Cu2-xS@IrSy as a highly efficient bifunctional electrocatalyst toward overall water splitting in acidic electrolytes

Jinwhan Joo, Haneul Jin, Aram Oh, Byeongyoon Kim, Jaeyoung Lee, Hionsuck Baik, Sang Hoon Joo, Kwangyeol Lee

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Development of highly active and durable bifunctional electrocatalysts for overall water splitting is vital for the economical production of H2 as an alternative energy source. Herein, we report the synthesis of Cu2-xS@IrSy@IrRu nanoparticles (CIS@IrRu NPs), which show excellent catalytic performances for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in an acidic electrolyte. Benefiting from the optimal composition of IrRu and the stable IrSy shell, the cactus-like IrRu NPs show high electrocatalytic activity and stability. The cactus-like IrRu NPs exhibit optimal HER and OER performances and high stability at a ratio of Ir/Ru 1.00:1.07. In overall water splitting, the CIS@Ir48Ru52 NPs achieve a current density of 10 mA cm-2 at a cell voltage of only 1.47 V in 0.1 M HClO4 electrolyte and show negligible degradation after 100 h of continuous operation in the stability test.

Original languageEnglish
Pages (from-to)16130-16138
Number of pages9
JournalJournal of Materials Chemistry A
Volume6
Issue number33
DOIs
Publication statusPublished - 2018 Jan 1

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Electrocatalysts
Electrolytes
Water
Hydrogen
Oxygen
Current density
Nanoparticles
Degradation
Electric potential
Chemical analysis

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

An IrRu alloy nanocactus on Cu2-xS@IrSy as a highly efficient bifunctional electrocatalyst toward overall water splitting in acidic electrolytes. / Joo, Jinwhan; Jin, Haneul; Oh, Aram; Kim, Byeongyoon; Lee, Jaeyoung; Baik, Hionsuck; Joo, Sang Hoon; Lee, Kwangyeol.

In: Journal of Materials Chemistry A, Vol. 6, No. 33, 01.01.2018, p. 16130-16138.

Research output: Contribution to journalArticle

Joo, Jinwhan ; Jin, Haneul ; Oh, Aram ; Kim, Byeongyoon ; Lee, Jaeyoung ; Baik, Hionsuck ; Joo, Sang Hoon ; Lee, Kwangyeol. / An IrRu alloy nanocactus on Cu2-xS@IrSy as a highly efficient bifunctional electrocatalyst toward overall water splitting in acidic electrolytes. In: Journal of Materials Chemistry A. 2018 ; Vol. 6, No. 33. pp. 16130-16138.
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AU - Baik, Hionsuck

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