Electrocatalytic Activity for the Hydrogen Evolution of the Electrodeposited Co–Ni–Mo, Co–Ni and Co–Mo Alloy Coatings

Agnieszka Laszczyńska , Irena Szczygieł

Abstract

The electrocatalytic activity for the HER of the ternary CoeNieMo and the binary CoeNi and CoeMo 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 CoeNi alloy. This is the results of larger real surface area of CoeMo and CoeNieMo alloys, which is confirmed by the higher surface roughness factors (Rf) calculated based on the EIS results. The ternary alloy coating is characterized by the highest Rf parameter and the highest catalytic activity for the HER.
Author Agnieszka Laszczyńska (EaE / IChaFT / DNCh)
Agnieszka Laszczyńska,,
- Department of Non-organic Chemistry
, Irena Szczygieł (EaE / IChaFT / DNCh)
Irena Szczygieł,,
- Department of Non-organic Chemistry
Journal seriesInternational Journal of Hydrogen Energy, ISSN 0360-3199, e-ISSN 1879-3487, (N/A 140 pkt)
Issue year2020
Vol45
No1
Pages508-520
Publication size in sheets0.6
Keywords in EnglishElectrodeposited Co-Based Alloys, Hydrogen Evolution Reaction, Electrocatalytic Activity Surface, Roughness Factor
ASJC Classification2102 Energy Engineering and Power Technology; 2103 Fuel Technology; 2105 Renewable Energy, Sustainability and the Environment; 3104 Condensed Matter Physics
DOIDOI:10.1016/j.ijhydene.2019.10.181
URL https://www.sciencedirect.com/science/article/pii/S0360319919340546
Languageen angielski
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Laszczyńska_Szczygieł_Electrocatalytic_Activity_ for_ the_ Hydrogen_ Evolution2020.pdf 2,27 MB
Score (nominal)140
Score sourcejournalList
Publication indicators Scopus Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.128; WoS Impact Factor: 2018 = 4.084 (2) - 2018=3.969 (5)
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