One–step electrodeposition of Ni–Ce–Pr–Ho/NF as an efficient electrocatalyst for hydrogen evolution reaction in alkaline medium

Wei Liu, Wenyu Tan, Hanwei He, Yizhi Peng, Yuxiang Chen and Yang Yang

Energy, 2022, vol. 250, issue C

Abstract: Finding non-precious metal hydrogen evolution reaction (HER) electrocatalysts with high efficiency and low cost is a great challenge. A novel HER electrocatalyst of amorphous Nickel–Cerium–Praseodymium–Holmium coating supported on nickel foam (Ni–Ce–Pr–Ho/NF) was successfully synthesized through one-step galvanostatic electrodeposition. The Ni–Ce–Pr–Ho catalyst exhibited excellent electrocatalytic activity toward HER with a low overpotential of 78 mV at 10 mA cm−2 in 1 M KOH. The Tafel slope of Ni–Ce–Pr–Ho electrocatalyst (121.6 mV·dec−1) indicated that the hydrogen reaction mechanism for Ni–Ce–Pr–Ho electrocatalysts followed a typical Volmer–Heyrovsky step. The remarkable HER performance was attributed to Pr and Ho doping, which resulted in the development of an amorphous structure, satisfactory intrinsic activity, and high conductivity.

Keywords: Ni–Ce–Pr–Ho Electrocatalyst; One–step electrodeposition; Hydrogen evolution reaction; Alkaline water electrolysis (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:250:y:2022:i:c:s0360544222007344

DOI: 10.1016/j.energy.2022.123831

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