Issue 1, 2023

Study on ethanol electro-oxidation over a carbon-supported Pt–Cu alloy catalyst by pinhole on-line electrochemical mass spectrometry

Abstract

A carbon supported Pt–Cu electrocatalyst was synthesized by the microwave-polyol method following acid-treatment and physically characterized by different techniques including X-ray diffraction (XRD) and transmission electron microscopy (TEM). Both potentiodynamic and potentiostatic measurements with pinhole on-line electrochemical mass spectrometry were carried out to study the electrocatalytic activity and reaction intermediates of Pt/C and Pt–Cu/C electrocatalysts during the ethanol oxidation reaction. The results of potentiodynamic and potentiostatic measurements showed that the Pt–Cu/C electrocatalyst has higher ethanol oxidation efficiency and incomplete ethanol oxidation to acetaldehyde and acetic acid prevails under the given conditions. After calibration of the m/z = 44 mass signal, the CO2 current efficiencies on Pt/C and PtCu-3/C were ∼7% and ∼12%, respectively, which reveal that the presence of copper enhances the complete ethanol oxidation to CO2.

Graphical abstract: Study on ethanol electro-oxidation over a carbon-supported Pt–Cu alloy catalyst by pinhole on-line electrochemical mass spectrometry

Article information

Article type
Paper
Submitted
04 Nov 2022
Accepted
30 Nov 2022
First published
22 Dec 2022
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2023,13, 448-455

Study on ethanol electro-oxidation over a carbon-supported Pt–Cu alloy catalyst by pinhole on-line electrochemical mass spectrometry

K. Ju, I. Jang, Yong-A. Choe, S. Ri, H. Pak and S. Hong, RSC Adv., 2023, 13, 448 DOI: 10.1039/D2RA06989J

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