Electrocatalytic activity for the hydrogen evolution of the electrodeposited Co-Ni-Mo, Co-Ni and Co-Mo alloy coatings

被引：72

作者：

Laszczynska, A. ^{[1
]}

Szczygiel, I. ^{[1
]}

机构：

[1] Wroclaw Univ Econ, Fac Engn & Econ, Dept Inorgan Chem, Komandorska 118-120, PL-53345 Wroclaw, Poland

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2020年 / 45卷 / 01期

关键词：

Electrodeposited Co-based alloys; Hydrogen evolution reaction; Electrocatalytic activity; Surface roughness factor; HETEROGENEOUS ELECTROCATALYSTS; EFFICIENT ELECTROCATALYST; COMPOSITE ELECTRODES; CATALYTIC-ACTIVITY; ALKALINE; NICKEL; IMPEDANCE; CATHODES; PERFORMANCE; DEPOSITION;

D O I：

10.1016/j.ijhydene.2019.10.181

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electrocatalytic activity for the HER of the ternary Co-N-Mo and the binary Co-Ni and Co-Mo alloy coatings is investigated in 1 M KOH solution. The surface morphology and the structure of the studied coatings is characterized by SEM and XRD analysis. The electrocatalytic activity for the HER is evaluated using cyclic voltammetry, electrochemical impedance spectroscopy, cathodic polarization and chronopotentiometry techniques. XRD analysis reveals that all studied coatings are composed of the Co-hcp structure. However, alloy deposits with Mo is characterized by more nanocrystalline structure. Electrochemical experiments reveal superior electrocatalytic activity of coatings with Mo in comparison to Co-Ni alloy. This is the results of larger real surface area of Co-Mo and Co-Ni-Mo alloys, which is confirmed by the higher surface roughness factors (R-f) calculated based on the EIS results. The ternary alloy coating is characterized by the highest R-f parameter and the highest catalytic activity for the HER. (C) 2019 The Authors. Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC.

引用

页码：508 / 520

页数：13

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