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Issue 16, 2019
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Activating hierarchically hortensia-like CoAl layered double hydroxides by alkaline etching and anion modulation strategies for the efficient oxygen evolution reaction

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Abstract

It is highly desirable to design and develop low-cost and Earth-abundant non-noble-metal electrocatalysts for the efficient and durable oxygen evolution reaction (OER) under alkaline conditions. Herein, hierarchically porous hortensia-like CoAl hydroxysulfide is converted from CoAl layered double hydroxides via alkaline etching and sulfuration strategies as an efficient electrocatalyst for the OER. In 1 M KOH, this electrode requires a low overpotential of 270 mV to drive the current density of 10 mA cm−2, with a small Tafel slope of 63 mV dec−1. Furthermore, it also possesses remarkably high stability with its activity being maintained at a stable overpotential of 10 mA cm−2 after testing for 26 h. Our work provides a promising cost-effective OER catalyst for large-scale electrochemical applications.

Graphical abstract: Activating hierarchically hortensia-like CoAl layered double hydroxides by alkaline etching and anion modulation strategies for the efficient oxygen evolution reaction

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Supplementary files

Article information


Submitted
04 Feb 2019
Accepted
09 Mar 2019
First published
11 Mar 2019

Dalton Trans., 2019,48, 5214-5221
Article type
Paper

Activating hierarchically hortensia-like CoAl layered double hydroxides by alkaline etching and anion modulation strategies for the efficient oxygen evolution reaction

X. Guo, F. Wu, G. Hao, S. Peng, N. Wang, Q. Li, Y. Hu and W. Jiang, Dalton Trans., 2019, 48, 5214
DOI: 10.1039/C9DT00538B

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