Interfacial Carbon Makes Nano-Particulate RuO2 an Efficient, Stable, pH-Universal Catalyst for Splitting of Seawater

Fang Fang, Yong Wang, Le Wei Shen, Ge Tian, David Cahen, Yu Xuan Xiao, Jiang Bo Chen, Si Ming Wu, Liang He, Kenneth I. Ozoemena, Mark D. Symes, Xiao Yu Yang

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

An electrocatalyst composed of RuO2 surrounded by interfacial carbon, is synthesized through controllable oxidization-calcination. This electrocatalyst provides efficient charge transfer, numerous active sites, and promising activity for pH-universal electrocatalytic overall seawater splitting. An electrolyzer with this catalyst gives current densities of 10 mA cm−2 at a record low cell voltage of 1.52 V, and shows excellent durability at current densities of 10 mA cm−2 for up to 100 h. Based on the results, a mechanism for the catalytic activity of the composite is proposed. Finally, a solar-driven system is assembled and used for overall seawater splitting, showing 95% Faraday efficiency.

Original languageEnglish
Article number2203778
JournalSmall
Volume18
Issue number42
DOIs
StatePublished - 20 Oct 2022

Bibliographical note

Publisher Copyright:
© 2022 Wiley-VCH GmbH.

Keywords

  • RuO -based electrocatalysts
  • directed transformation
  • hierarchical nanostructures
  • interface engineering
  • seawater splitting

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