Tailored PEO synthesis and in-situ ATR-FTIR study of PtSnO2/Nb coral-like structures for application in ethanol electrooxidation

Coupling the electrooxidation of organic compounds (EOO) with hydrogen evolution can be a sustainable way for green hydrogen production, and therefore it’s of great interest to the development of suitable electrocatalysts for efficient EOO. In this study, we present the successful solvothermal synth...

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Bibliographic Details
Published in:Journal of alloys and compounds 2024-10, Vol.1002, p.175178, Article 175178
Main Authors: Bullmann, Matheus, Etcheverry, Louise, Suárez, Andrés Cuña, Sampaio, Edna Jerusa Pacheco, Pitthan, Eduardo, Andrade, Antonio Marcos Helgueira de, de Fraga Malfatti, Célia
Format: Article
Language:English
Subjects:
Ethanol electrooxidation
Green hydrogen
In-situ ATR-FTIR
Plasma Electrolytic Oxidation
Solvothermal synthesis
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Summary:Coupling the electrooxidation of organic compounds (EOO) with hydrogen evolution can be a sustainable way for green hydrogen production, and therefore it’s of great interest to the development of suitable electrocatalysts for efficient EOO. In this study, we present the successful solvothermal synthesis of a Pt-based electrocatalyst for an ethanol oxidation reaction (EOR), using a coral-like structure as substrate which was prepared by plasma electrolytic oxidation (PEO) on a metallic niobium. Chemical analysis revealed the predominance of SnO2 in the PEO structure, while Pt doping demonstrated selectivity on the surface of the electrocatalyst. Cyclic voltammograms indicate a high electrochemically active surface area (122.45 m² gPt−1), with an onset potential of 0.27 V vs. SHE. In-situ spectroelectrochemical analysis confirm the efficient ethanol electrooxidation with remarkable selectivity in C-C bond cleavage. The prepared electrocatalyst stands out as a promising contribution to advances in green hydrogen production by coupling EOR with hydrogen evolution. [Display omitted] •Coral-like SnO2 structure was successfully synthesized via PEO on Nb substrate.•This support was used to prepare a Pt based electrocatalyst via solvothermal process.•The ToF-ERDA and RBS reveal the deposition of Pt on the support superficial layer.•The electrocatalyst showed very good performance in ethanol oxidation reaction.•In-situ ATR-FTIR analysis showed a remarkable selectivity in CO2 formation.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2024.175178