Electro-oxidation of ethanol in acid medium using carbon-supported PtRh nanoparticles with (100) preferential orientation

Carbon-supported PtRh nanoparticles with preferential (100) orientation was prepared by an alcohol-reduction process using KBr as a shape directing agent. The electrocatalysts were characterized by EDX (energy-dispersive X-ray analysis), XRD (X-ray diffraction) and TEM (Transmission electron microsc...

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Bibliographic Details
Published inInternational journal of electrochemical science Vol. 16; no. 12; p. 211253
Main Authors Pereira Filho, N.G., Souza, R.F.B., Ramos, A.S., Antoniassi, R.M., Oliveira Neto, A., Spinacé, E.V.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.2021
Subjects
DEFC
electrocatalysts
ethanol
fuel cell
preferential orientation
PtRh nanoparticles
DEFC
electrocatalysts
fuel cell
PtRh nanoparticles
preferential orientation
ethanol
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Summary:Carbon-supported PtRh nanoparticles with preferential (100) orientation was prepared by an alcohol-reduction process using KBr as a shape directing agent. The electrocatalysts were characterized by EDX (energy-dispersive X-ray analysis), XRD (X-ray diffraction) and TEM (Transmission electron microscopy). The electro-oxidation of ethanol was studied by cyclic voltammetry and chronoamperometry at room temperature in acid medium. On-line differential mass spectrometry experiments were performed on a single cell of a direct ethanol fuel cell (DEFC) at 60 °C and the anodic effluents were analyzed by ATR-FTIR. PtRh/C (100) electrocatalyst showed cubic-like morphology and average nanoparticles size of 8 nm and provided superior DEFC performance (density power per Pt active area) and CO2 selectivity compared to polycrystalline PtRh/C and commercial Pt/C electrocatalysts.
ISSN:1452-3981
1452-3981
DOI:10.20964/2021.12.56