Nickel nanoparticles oriented on carbon materials as an efficient electrocatalyst for the hydrogen evolution reaction
Heng Ke1, Jixiang Zhang1, Wenqi Luo1
1New Energy Materials and Devices Research Team College of New Energy, Jingchu University of Technology, Jingmen, China. khjuct@126.com.
Abstract:
The fabrication of highly efficient and stable non-noble metal hydrogen evolution reaction (HER) electrocatalysts is of paramount significance for alleviating the energy and environmental crises. Herein, nickel (Ni) nanoparticles anchored on a carbon layer dispersed on carbon materials (Ni/C) are synthesized via a facile one-step thermal treatment. The nanostructure can facilitate mass transfer, expose more active sites and promote hydrogen (H2) gas release. Benefiting from these advantages, Ni/C-0.8 exhibits excellent electrocatalytic HER performance. The overpotential of Ni/C-0.8 is -132 mV at -10 mA cm-2, and its Tafel slope is 117 mV dec-1 in an alkaline solution. Additionally, Ni/C-0.8 exhibits remarkable stability during long-term testing. This work offers a new avenue for designing and fabricating non-noble metal electrocatalysts for the electrocatalytic HER.
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