Channel-Rich RuCu Nanosheets for pH-Universal Overall Water Splitting Electrocatalysis

Qing Yao, Bolong Huang, Nan Zhang, Mingzi Sun, Qi Shao, Xiaoqing Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

96 Citations (Scopus)

Abstract

Channel-rich RuCu snowflake-like nanosheets (NSs) composed of crystallized Ru and amorphous Cu were used as efficient electrocatalysts for oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and overall water splitting in pH-universal electrolytes. The optimized RuCu NSs/C-350 °C and RuCu NSs/C-250 °C show attractive activities of OER and HER with low overpotentials and small Tafel slopes, respectively. When applied to overall water splitting, the optimized RuCu NSs/C can reach 10 mA cm−2 at cell voltages of only 1.49, 1.55, 1.49 and 1.50 V in 1 m KOH, 0.1 m KOH, 0.5 m H2SO4 and 0.05 m H2SO4, respectively, much lower than those of commercial Ir/C∥Pt/C. The optimized electrolyzer exhibits superior durability with small potential change after up to 45 h in 1 m KOH, showing a class of efficient functional electrocatalysts for overall water splitting.

Original languageEnglish
Pages (from-to)13983-13988
Number of pages6
JournalAngewandte Chemie - International Edition
Volume58
Issue number39
DOIs
Publication statusPublished - 23 Sep 2019

Keywords

  • channels
  • electrocatalysis
  • nanosheets
  • overall water splitting
  • ruthenium

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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