Electrochemical properties of mechanically milled Ni-20Cr for H2 oxidation in alkaline fuel cells

[Display omitted] •The kinetics for HOR improves as the milling time of Ni-20Cr increases.•Milled Ni-20Cr presents a comparable activity to the best Ni-based electrocatalyst.•Pt particles mainly grow on the surface of highly deformed Ni-20Cr particles. The electrochemical properties of Ni-20Cr alloy...

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Published inChemical physics letters Vol. 829; p. 140745
Main Authors Antonio-Gordillo, Diana Montserrat, Godínez-García, Andrés, Alonso-González, Omero, Ruiz-Luna, Haideé
Format Journal Article
LanguageEnglish
Published Elsevier B.V 16.10.2023
Subjects
Alkaline fuel cells
Hydrogen oxidation reaction
Milling processing
Ni-based catalysts
Milling processing
Hydrogen oxidation reaction
Ni-based catalysts
Alkaline fuel cells
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Summary:[Display omitted] •The kinetics for HOR improves as the milling time of Ni-20Cr increases.•Milled Ni-20Cr presents a comparable activity to the best Ni-based electrocatalyst.•Pt particles mainly grow on the surface of highly deformed Ni-20Cr particles. The electrochemical properties of Ni-20Cr alloy subject to high-energy mechanical milling were investigated to analyze its potential as a catalyst in fuel cells for hydrogen oxidation reaction (HOR) in an alkaline medium. The kinetic properties of Ni-20Cr alloy decorated with Pt are also reported. Results showed that as the milling time increases, the HOR kinetics improve. Pt particles grow mainly on the surface of highly deformed Ni-20Cr particles. Ni-20Cr and Ni-20Cr/Pt with 12 and 8 h of milling, respectively, are good candidates for HOR in an alkaline medium.
ISSN:0009-2614
DOI:10.1016/j.cplett.2023.140745