Issue 35, 2018

HMTA-assisted formation of hierarchical Co-based materials built by low-dimensional substructures as water oxidation electrocatalysts

Abstract

Developing water oxidation catalysts with low overpotential and high stability has become the frontier of energy conversion research. Herein, we report a micro-flowers (MFs) cobalt (Co) based material with a three-dimensional (3D) open structure consisting of two-dimensional (2D) nanosheets. The MFs were synthesized by using HMTA to adjust the microscopic environment of the Co ions, which consist of Co3O4 and Co(OH)2. Electrochemical evaluation reveals that the MFs electrocatalysts exhibit a low overpotential of η = 295 mV at 10 mA cm−2 and a long-term stability in a 1.0 M KOH solution. The excellent OER performance is attributed to the hierarchical structure, which combines the fast charge transfer ability of low-dimensional structures and the fast mass transfer ability of high-dimensional structures.

Graphical abstract: HMTA-assisted formation of hierarchical Co-based materials built by low-dimensional substructures as water oxidation electrocatalysts

Supplementary files

Article information

Article type
Paper
Submitted
24 Jul 2018
Accepted
06 Aug 2018
First published
06 Aug 2018

CrystEngComm, 2018,20, 5249-5255

HMTA-assisted formation of hierarchical Co-based materials built by low-dimensional substructures as water oxidation electrocatalysts

K. Yan, Z. Liang, Z. Li, M. Zhang, Y. Huang and Y. Wang, CrystEngComm, 2018, 20, 5249 DOI: 10.1039/C8CE01234B

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