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The development of efficient, low-cost, stable, non-noble-metal electrocatalysts for water splitting, particularly those that can catalyze both the hydrogen evolution reaction (HER) at the cathode and oxygen evolution reaction (OER) at the anode, is a challenge. We have developed a facile method for synthesizing CoSe2 nanoparticles uniformly anchored on carbon fiber paper (CoSe2/CF) via pyrolysis and selenization of in situ grown zeolitic imidazolate framework-67 (ZIF-67). CoSe2/CF shows high and stable catalytic activity in both the HER and OER in alkaline solution. At a low cell potential, i.e., 1.63 V, a water electrolyzer equipped with two CoSe2/CF electrodes gave a water-splitting current of 10 mA·cm-2. At a current of 20 mA·cm-2, it can operate without degradation for 30 h. This study not only offers a cost-effective solution for water splitting but also provides a new strategy for developing various catalytic nanostructures by changing the metal–organic framework precursors.

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Publication history

Received: 04 March 2016
Revised: 15 April 2016
Accepted: 17 April 2016
Published: 30 July 2016
Issue date: August 2016

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© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2016

Acknowledgements

Acknowledgements

The project is supported by the National Natural Science Foundation of China (Nos. 21275076 and 61328401), Jiangsu Provincial Founds for Distinguished Young Scholars (No. BK20130046), Key University Science Research Project of Jiangsu Province (No. 15KJA430006), Program for New Century Excellent Talents in University (No. NCET-13-0853), QingLan Project, Nantong Key Laboratory of New Materials Industrial Technology, SERC Grant (#102170 0142) from A*STAR Singapore, the scholarship from China Scholarships Council (No. 201508320304).

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Email: nanores@tup.tsinghua.edu.cn

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