Highly boosted oxygen reduction reaction activity by tuning the underwater wetting state of the superhydrophobic electrode

Pengwei Wang, Toru Hayashi, Qing'an Meng, Qianbin Wang, Huan Liu, Kazuhito Hashimoto, Lei Jiang

Research output: Contribution to journalArticleResearchpeer-review

46 Citations (Scopus)

Abstract

Researchers proposed that controlling the underwater wetting state of the electrode, especially that of a superhydrophobic electrode, was important for oxygen reduction reaction (ORR), a gas-consuming reaction. Through the rational design of the surface texture of the hydrophobic electrode, the underwater wetting state of the electrode was tuned in a controllable manner, and consequently the underwater liquid/gas/solid triphase interface where electron transfer commonly taking place was tailored. It was suggested that the superhydrophobic electrode with particularly underwater Wenzel-Cassie coexistent state (UWC-state) is the essence for maximizing and stabilizing the underwater liquid/gas/solid triphase interface, by which the gas-diffusion on the electrode could be drastically facilitated, along with the rate of the reaction with gas as the reactant.

Original languageEnglish
Article number1601250
Number of pages7
JournalSmall
Volume13
Issue number4
DOIs
Publication statusPublished - 25 Jan 2017
Externally publishedYes

Keywords

  • liquid/gas/solid triphase, ORR
  • superhydrophobic electrodes
  • underwater
  • wetting state

Cite this