3D Se-doped NiCoP nanoarrays on carbon cloth for efficient alkaline hydrogen evolution

Autor: Xiao-long Wang, Yali Xu, Qunli Tang, Zi-xuan Liu, Xiaohua Chen, Aiping Hu
Rok vydání: 2021
Předmět:
Zdroj: Journal of Central South University. 28:2345-2359
ISSN: 2227-5223
2095-2899
DOI: 10.1007/s11771-021-4774-y
Popis: The exploration of stable and highly efficient alkaline hydrogen evolution reaction (HER) electrocatalysts is imperative for alkaline water splitting. Herein, Se-doped NiCoP with hierarchical nanoarray structures directly grown on carbon cloth (Se-NiCoP/CC) was prepared by hydrothermal reaction and phosphorization/selenization process. The experimental results reveal that Se doping could increase the electrochemical active sites and alter the electronic structure of NiCoP. The optimized Se-NiCoP/CC electrode exhibits outstanding HER activity in alkaline electrolyte, which only needs a low overpotential of 79 mV at the current density of 10 mA/cm2. When serving as anode and cathode electrode simultaneously, the Se-NiCoP/CC electrodes achieve current density of 50 mA/cm2 at a low voltage of only 1.62 V. This work provides a feasible way to rationally design high active HER electrocatalysts.
Databáze: OpenAIRE
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