An Electrocatalytic Activity of AuCeO<sub>2</sub>/Carbon Catalyst in Fuel Cell Reactions: Oxidation of Borohydride and Reduction of Oxygen

Raminta Stagniūnaitė; Virginija Kepenienė; Aldona Balčiūnaitė; Audrius Drabavičius; Vidas Pakštas; Vitalija Jasulaitienė; Loreta Tamašauskaitė-Tamašiūnaitė; Eugenijus Norkus

doi:10.3390/catal11030342

Catalysts (Mar 2021)

An Electrocatalytic Activity of AuCeO<sub>2</sub>/Carbon Catalyst in Fuel Cell Reactions: Oxidation of Borohydride and Reduction of Oxygen

Raminta Stagniūnaitė,
Virginija Kepenienė,
Aldona Balčiūnaitė,
Audrius Drabavičius,
Vidas Pakštas,
Vitalija Jasulaitienė,
Loreta Tamašauskaitė-Tamašiūnaitė,
Eugenijus Norkus

Affiliations

Raminta Stagniūnaitė: Center for Physical Sciences and Technology, Department of Catalysis, Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania
Virginija Kepenienė: Center for Physical Sciences and Technology, Department of Catalysis, Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania
Aldona Balčiūnaitė: Center for Physical Sciences and Technology, Department of Catalysis, Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania
Audrius Drabavičius: Center for Physical Sciences and Technology, Department of Catalysis, Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania
Vidas Pakštas: Center for Physical Sciences and Technology, Department of Catalysis, Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania
Vitalija Jasulaitienė: Center for Physical Sciences and Technology, Department of Catalysis, Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania
Loreta Tamašauskaitė-Tamašiūnaitė: Center for Physical Sciences and Technology, Department of Catalysis, Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania
Eugenijus Norkus: Center for Physical Sciences and Technology, Department of Catalysis, Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania

DOI: https://doi.org/10.3390/catal11030342
Journal volume & issue: Vol. 11, no. 3
p. 342

Abstract

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This paper describes the investigation of electrocatalytic activity of the AuCeO2/C catalyst, prepared using the microwave irradiation method, towards the oxidation of sodium borohydride and oxygen reduction reactions in an alkaline medium. It was found that the obtained AuCeO2/C catalyst with Au loading and electrochemically active surface area of Au nanoparticles (AuNPs) equal to 71 µg cm−2 and 0.05 cm2, respectively, showed an enhanced electrocatalytic activity towards investigated reactions, compared with the Au/C catalyst with an Au loading and electrochemically active surface area of AuNPs equal to 78 µg cm−2 and 0.19 cm2, respectively. The AuCeO2/C catalyst demonstrated ca. 4.5 times higher current density values for the oxidation of sodium borohydride compared with those of the bare Au/C catalyst. Moreover, the onset potential of the oxygen reduction reaction (0.96 V) on the AuCeO2/C catalyst was similar to the commercial Pt/C (0.98 V).

Published in Catalysts

ISSN: 2073-4344 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Chemical technology; Science: Chemistry
Website: https://www.mdpi.com/journal/catalysts

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