Spinel Cobalt Titanium Binary Oxide as an All-Non-Precious Water Oxidation Electrocatalyst in Acid

Sengeni Anantharaj, Kannimuthu Karthick, Subrata Kundu*

*この研究の対応する著者

研究成果: Article査読

18 被引用数 (Scopus)

抄録

Replacing precious water oxidation electrocatalysts used in proton exchange membrane (PEM) water electrolyzers with the nonprecious and abundant electrocatalysts is still a poorly addressed issue in the field of hydrogen generation in acidic medium through water electrolysis. Herein we report such an all-nonprecious binary spinel metal oxide the "cobalt titanate" (Co2TiO4) as an efficient alternate to expensive IrO2 and RuO2 for PEM water electrolyzer. The synthesized Co2TiO4 octahedral nanocrystals of size 50 to 210 nm showed excellent oxygen evolution reaction (OER) activity in 0.5 M H2SO4, which was comparable to IrO2 and better than spinel Co3O4 when examined under identical experimental conditions. Overpotential of just 513 mV was sufficient enough to drive a kinetic current density of 10 mA cm-2, which is a significant figure of merit as far as acidic water oxidation electrocatalysis is concerned.

本文言語English
ページ(範囲)8570-8576
ページ数7
ジャーナルInorganic Chemistry
58
13
DOI
出版ステータスPublished - 2019 7 1
外部発表はい

ASJC Scopus subject areas

  • 物理化学および理論化学
  • 無機化学

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