TY - JOUR

T1 - Electrodeposited Ni-P Electrodes: An Effect of Amorphous Structure on the Electrochemical Behavior and Electrocatalytic Activity in the Hydrogen Oxidation Reaction in Alkaline Media

AU - Kuznetsov, A.N.

AU - Cherstiouk , O.V.

AU - Зайковский, Владимир Иванович

AU - Rudina , N.A.

AU - Kvon , R.I.

AU - Oshchepkov , A.G.

N1 - The authors acknowledge CKP VTAN NSU for the usage of their experimental equipment. This work was supported by the Ministry of Science and Higher Education of the Russian Federation within the governmental order for Boreskov lnstitute of Catalysis (project AAAAA21-121011390006-0).

PY - 2023/9/1

Y1 - 2023/9/1

N2 - Glassy carbon supported Ni/GC and amorphous Ni-P/GC electrodes were prepared by potentiostatic electrodeposition. The catalysts have been characterized by X-ray powder diffraction, transmission and scanning electron microscopy, and cyclic voltammetry. Particular attention has been paid to the influence of electrochemical oxidation on the electrochemical behavior of Ni-P/GC and Ni/GC electrodes in alkaline media as well as the activity of these electrodes in the hydrogen oxidation reaction (HOR). It was found that the oxidation treatment changes the properties of Ni/GC electrode due to the formation of active Ni/NiOx surface sites, while insignificantly affecting the performance of Ni-P/GC sample. The unordinary behavior of electrodeposited Ni-P/GC samples is tentatively attributed to their amorphous structure and the formation of nickel phosphate under high anodic potentials, which prevents the formation of irreversible Ni oxides.

AB - Glassy carbon supported Ni/GC and amorphous Ni-P/GC electrodes were prepared by potentiostatic electrodeposition. The catalysts have been characterized by X-ray powder diffraction, transmission and scanning electron microscopy, and cyclic voltammetry. Particular attention has been paid to the influence of electrochemical oxidation on the electrochemical behavior of Ni-P/GC and Ni/GC electrodes in alkaline media as well as the activity of these electrodes in the hydrogen oxidation reaction (HOR). It was found that the oxidation treatment changes the properties of Ni/GC electrode due to the formation of active Ni/NiOx surface sites, while insignificantly affecting the performance of Ni-P/GC sample. The unordinary behavior of electrodeposited Ni-P/GC samples is tentatively attributed to their amorphous structure and the formation of nickel phosphate under high anodic potentials, which prevents the formation of irreversible Ni oxides.

KW - Alkaline solutions

KW - Amorphous

KW - Hydrogen oxidation reaction (HOR)

KW - Nickel

KW - Phosphorus

UR - https://www.mendeley.com/catalogue/f37b9860-2873-3694-82cf-ad339e56c6d0/

U2 - 10.1016/j.jelechem.2023.117676

DO - 10.1016/j.jelechem.2023.117676

M3 - Article

VL - 944

JO - Journal of Electroanalytical Chemistry

JF - Journal of Electroanalytical Chemistry

SN - 1572-6657

M1 - 117676

ER -