Issue 45, 2021

Graphene-induced growth of Co3O4 nanoplates with modulable oxygen vacancies for improved OER properties

Abstract

Transition metal oxide/hydroxide is intensively studied for the oxygen evolution reaction (OER). Herein, the graphene-induced growth of Co3O4 nanoplates with modulable oxygen vacancies via a hydrothermal treatment is reported. With the increase of reaction time before the formation of Co(OH)2, the oxygen vacancies and conductivity of Co3O4 nanoplates continued to increase resulting in dramatically enhanced OER performances. An ultralow overpotential of 354 mV at a current density of 100 mA cm−2 and a Tafel slope as low as 63.24 mV dec−1 in 1 M KOH solution were obtained, superior to those of most reported oxides and RuO2.

Graphical abstract: Graphene-induced growth of Co3O4 nanoplates with modulable oxygen vacancies for improved OER properties

Supplementary files

Article information

Article type
Communication
Submitted
22 Febr. 2021
Accepted
28 Apr. 2021
First published
28 Apr. 2021

CrystEngComm, 2021,23, 7928-7931

Graphene-induced growth of Co3O4 nanoplates with modulable oxygen vacancies for improved OER properties

L. Qi, M. Wang and X. Li, CrystEngComm, 2021, 23, 7928 DOI: 10.1039/D1CE00255D

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