Electrodeposition and properties of CoWRe alloys
Source abstract
Abstract
In this work, the chemical and phase compositions of ternary electrolytic alloys CoWRe deposited from an acidic citrate electrolyte have been investigated as a function of current density. The obtained coatings were found to have electrocatalytic properties in the hydrogen evolution reaction (HER). In the studied range of tungsten and rhenium concentrations, the maximum decrease in hydrogen evolution overvoltage in comparison with the cobalt coating is 170 mV, and the hydrogen exchange current increases by more than 15 times. Corrosion tests in solutions of different mineralization showed that the coatings have the highest corrosion resistance in a model corrosive solution of NaCl—4.5 kΩ cm2, and in a KOH solution—2.7 kΩ cm2. It has been shown that to obtain efficient and corrosion-resistant electrocatalysts, the amount of refractory metals not exceeding 30 at.% and the formation of a crystal structure during electrodeposition are required.Graphical abstract
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Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Electrochemical Analysis and Applications · Chalcogenide Semiconductor Thin Films
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References (24)
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