Issue 18, 2015

CoSe2 necklace-like nanowires supported by carbon fiber paper: a 3D integrated electrode for the hydrogen evolution reaction

Abstract

Pyrite-type CoSe2 necklace-like nanowires (NWs) were successfully grown on carbon fiber paper (CFP) and proven to be an efficient electrocatalyst towards the hydrogen evolution reaction (HER). By combining the use of mesoporous CFP and the nano-structuring of the electrocatalyst, the highly active CoSe2 necklace-like NWs on CFP only need the modest overpotentials of 188 and 199 mV to afford the current densities of 50 and 100 mA cm−2, respectively. A small Tafel slope of 34 mV dec−1 and a charge transfer resistance of 7.05 Ω illustrate the prominent electrocatalytic performance. After continual electrolysis for 20 h or conducting cycling for 5000 times, the high activity of CoSe2 NWs toward the HER is still perfectly preserved. The outstanding electrocatalytic performance and stability make the CoSe2 necklace-like NWs on CFP a promising earth-abundant electrocatalyst for the HER and other renewable energy applications.

Graphical abstract: CoSe2 necklace-like nanowires supported by carbon fiber paper: a 3D integrated electrode for the hydrogen evolution reaction

Supplementary files

Article information

Article type
Communication
Submitted
11 Feb 2015
Accepted
25 Mar 2015
First published
25 Mar 2015

J. Mater. Chem. A, 2015,3, 9415-9420

Author version available

CoSe2 necklace-like nanowires supported by carbon fiber paper: a 3D integrated electrode for the hydrogen evolution reaction

K. Wang, D. Xi, C. Zhou, Z. Shi, H. Xia, G. Liu and G. Qiao, J. Mater. Chem. A, 2015, 3, 9415 DOI: 10.1039/C5TA01143D

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