Catalytic activity of nickel–copper powder alloys in the processes of electrochemical hydrogen evolution in alkaline solution and ethanol alkaline solution
https://doi.org/10.29235/1561-8331-2022-58-1-36-44
Abstract
Ni93Cu and Ni82Cu (at%) alloys were synthesized by the method of combined chemical reduction of Ni(II) and Cu(II) with hydrazine hydrate. These alloys consist of crystalline phases of nickel, solid solution of copper in nickel. Determination by the “capacitive method” of the electrochemically active surface area of working graphite electrodes with “catalytic inks” containing Ni93Cu and Ni82Cu powders showed that it is 4 and 20 % larger than for nickel powder, respectively. It was found that powder alloys Ni93Cu and Ni82Cu are applicable as catalysts for the electrochemical process of hydrogen evolution in alkaline solutions and alkaline ethanol solution. It was determined that the catalytic activity of Ni82Cu powder alloy in the process of hydrogen evolution in the alkaline ethanol solution is higher than for nickel and Ni93Cu powders. The catalytic ability of the Ni82Cu powder alloy during cycling for 25 cycles practically does not change, in contrast to Ni and Ni93Cu.
About the Authors
O. N. Vrublevskaya
Research Institute for Physical Chemical Problems of the Belarusian State University
Belarus
Belarus
Vrublevskaya Olga N. – Ph. D. (Chemistry), Associate Professor, Vice Director for Scientific and Innovative Work
14, Leningradskaya Str., 220006, Minsk
A. B. Shcherbakova
Belarusian State University
Belarus
Belarus
Shcherbakova Alexandra B. – student
14, Leningradskaya Str., 220050, Minsk
A. A. Kudaka
Research Institute for Physical Chemical Problems of the Belarusian State University
Belarus
Belarus
Kudaka Anton A. – Junior Researcher
14, Leningradskaya Str., 220006, Minsk
M. G. Galuza
Research Institute for Physical Chemical Problems of the Belarusian State University
Belarus
Belarus
Galuza Maria G. – Junior Researcher
14, Leningradskaya Str., 220006, Minsk
G. Sevjidsuren
Institute of Physics and Technology of the Mongolian Academy of Sciences
Mongolia
Mongolia
Galsan Sevjidsuren – Ph. D. (Physics). Chair of Materials Science Department
54B, Peace Ave., 13330, Ulaanbaatar
B. Bolormaa
Institute of Physics and Technology of the Mongolian Academy of Sciences
Mongolia
Mongolia
Burentogtokh Bolormaa – Researcher of Materials Science Department
54B, Peace Ave., 13330, Ulaanbaatar
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