In situ derived nanocomposites electrocatalysts from cobalt molybdates for hydrogen evolution reaction
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In situ derived nanocomposites electrocatalysts from cobalt molybdates for hydrogen evolution reaction Wenjie Luo1,2 · Jie Wang3 · Zhen Zhang4 · Donglin Lu1,2 · Yang Yu1,2 · Yuan Ji1,2 · Hui Qiao1,2 · Xiang Qi1,2 · Yundan Liu1,2 Received: 22 March 2020 / Accepted: 21 July 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract The development of effective but earth-abundant electrocatalysts for hydrogen evolution is still a great challenge. Non-noble metal-based multi-phase nanocomposites are regarded as emerging catalysts for efficient catalysts, but their practical application is still hindered by the lack of both satisfying activity and cost-effective synthesis. In this work, ternary CoSe2/MoO2/ MoSe2 nanocomposites with controllable phases have been successfully synthesized by simply direct selenization of cobalt molybdate (CoMoO4) nanorods. Compared with related pure Mo-based and Co-based counterparts, the electric conductivity and the active sites of the as-prepared ternary nanocomposites have been both increased due to the synergistic effects. The as-prepared ternary CoSe2/MoO2/MoSe2 nanocomposites electrocatalysts demonstrated superior HER performance which only requiring an overpotential of 229 mV for reaching 10 mA/cm2 current density in acidic media.
1 Introduction As a renewable and low-emission energy resource, hydrogen is regarded as an ideal candidate to replace fossil fuel [1–3]. Among all the techniques for producing hydrogen, water electrolysis is one of the most effective and renewable strategies [4, 5]. In order to accelerate the efficiency of water-splitting and lower the electrochemical overpotentials, Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10854-020-04060-9) contains supplementary material, which is available to authorized users. * Yundan Liu [email protected] 1
Laboratory for Quantum Engineering and Micro‑Nano Energy Technology and School of Physics and Optoelectronics, Xiangtan University, Xiangtan 411105, Hunan, People’s Republic of China
2
Hunan Key Laboratory of Micro‑Nano Energy Materials and Devices, Xiangtan University, Xiangtan 411105, Hunan, People’s Republic of China
3
Department of Physics, Beijing Normal University, Beijing 100875, People’s Republic of China
4
Department of Materials Science and Engineering and Shenzhen Key Laboratory of Hydrogen Energy, Southern University of Science and Technology, Shenzhen 518055, People’s Republic of China
some state-of-art catalysts like Pt-based compounds have been developed. However, the industry-scale applications of Pt-based electrocatalysts are hindered by their high cost and scarcity [6–8]. Developing both efficient and cost-effective electrocatalysts is highly demanded for practical hydrogen production by water electrolysis. Recently, it has been found that transition metal sulfides were developed as high-performance non-noble metalbased electrocatalysts [9–12]. In addition of transition metal sulfides, the emerging transition
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