Issue 29, 2016

Rational design of cobalt–chromium layered double hydroxide as a highly efficient electrocatalyst for water oxidation

Abstract

The design of a high performance, stable and cost-effective electrocatalyst for oxygen evolution is crucial for H2 production from electrochemical water splitting. Here, as a dual-functional-site catalyst, cobalt–chromium layered double hydroxide (CoCr LDH) nanosheets are designed and synthesized, where Co2+ is the catalytically active site and Cr3+ is the charge transfer site. OER investigation of CoCr LDH is conducted for the first time. The CoCr LDH nanosheets have a high specific surface area of 151.78 m2 g−1 and exhibit outstanding OER activities, among the best of Co-based candidates. Accordingly, our catalyst affords a low onset potential of 1.47 V (vs. reversible hydrogen electrode, RHE) and a stable current density of 22.8 mA cm−2 at 1.61 V (vs. RHE) for 12 h. The Tafel slope of CoCr LDH is 81.0 mV dec−1, smaller than that of state-of-the-art RuO2 (90.1 mV dec−1). Therefore, the CoCr LDH nanosheets are promising OER catalysts.

Graphical abstract: Rational design of cobalt–chromium layered double hydroxide as a highly efficient electrocatalyst for water oxidation

Supplementary files

Article information

Article type
Paper
Submitted
16 May 2016
Accepted
24 Jun 2016
First published
24 Jun 2016

J. Mater. Chem. A, 2016,4, 11292-11298

Rational design of cobalt–chromium layered double hydroxide as a highly efficient electrocatalyst for water oxidation

C. Dong, X. Yuan, X. Wang, X. Liu, W. Dong, R. Wang, Y. Duan and F. Huang, J. Mater. Chem. A, 2016, 4, 11292 DOI: 10.1039/C6TA04052G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements