Enhanced stability of PdPtAu alloy catalyst for formic acid oxidation

In this study, the ternary catalyst, PdPtAu, was synthesized for the electrochemical formic acid oxidation reaction. The catalyst was prepared through the co-precipitation using NaBH 4 as a reducing agent. The status of catalyst formation and the extent of average particle size were known by X-ray d...

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Bibliographic Details
Published in:The Korean journal of chemical engineering 2021, 38(11), 260, pp.2229-2234
Main Authors: Jung, Won Suk, Han, Jonghee
Format: Article
Language:English
Subjects:
Biotechnology
Catalysis
Catalysts
Chemical synthesis
Chemistry
Chemistry and Materials Science
Deactivation
Durability
Energy
Formic acid
Gold
High resistance
Industrial Chemistry/Chemical Engineering
Materials Science
Oxidation
Palladium
Platinum
Reducing agents
Stability
화학공학
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Summary:In this study, the ternary catalyst, PdPtAu, was synthesized for the electrochemical formic acid oxidation reaction. The catalyst was prepared through the co-precipitation using NaBH 4 as a reducing agent. The status of catalyst formation and the extent of average particle size were known by X-ray diffraction (XRD) and transmission electron microscopy (TEM). For this work, we accomplished electrochemical analyses for the PdPtAu, Pd, Pt, and Au, which defines each activity for formic acid oxidation. In durability tests, half cell and single cell tests show even better stability than the Pd and Au catalysts. Stripping tests were carried out after durability tests. Based on results, the ternary PdPtAu catalyst is less deactivated than the Pd, while the catalyst shows higher activity than the Pt. The PdPtAu catalyst represents high resistance for poisoning as compared to the Pd. We demonstrate the stability of the PdPtAu catalyst in the 3-electrode electrochemical system and single cell tests. After 2 h-operation, the deactivation degree of PdPtAu shows 27% loss of the initial current density, while Pd and Pt catalysts lost 39% and 57% of them, respectively.
ISSN:0256-1115
1975-7220
DOI:10.1007/s11814-021-0909-y