Activity screening of Pt-CeO2 gradient films prepared by bipolar electrochemistry for electrooxidation reactions

IF 5.3 2区化学 Q1 CHEMISTRY, ANALYTICAL

Microchimica Acta Pub Date : 2025-03-28 DOI:10.1007/s00604-025-07109-w

Marisa Ketkaew, Getnet Kassahun, Nashwan Hussein Ali, Patrick Garrigue, Sébastien Bonhommeau, Laurent Bouffier, Alexander Kuhn, Chularat Wattanakit, Dodzi Zigah

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Abstract

Glassy carbon electrodes were modified with a CeO₂ film and Pt nanoparticles (Pt-CeO₂) for electrocatalysis. Interestingly, the oxidation of benzyl alcohol was significantly enhanced when Pt-CeO₂ films were prepared by the simultaneous electrodeposition of the two materials, indicating a significant synergistic electrocatalytic activity. Subsequently, bipolar electrochemistry was employed to prepare Pt-CeO₂ gradient films. Scanning electrochemical microscopy (SECM) was employed for studying local electrochemical properties at liquid/solid interfaces. SECM allowed mapping the local electrochemical performance of the Pt-CeO₂ gradient films for benzyl alcohol oxidation, showing that the reaction rate is proportional to the local Pt-CeO₂ surface coverage. Therefore, Pt-CeO₂ deposits with different densities along the bipolar electrode offer tunable catalytic performances for benzyl alcohol oxidation. This allows identifying in a fast and straightforward way the optimal conditions for electrocatalytic processes in a more general sense because the approach, illustrated here with one specific reaction, can be easily generalized to other catalytically active surfaces.

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来源期刊

Microchimica Acta 化学-分析化学

CiteScore

9.80

自引率

5.30%

发文量

410

审稿时长

2.7 months

期刊介绍： As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.