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

被引：5
作者：
Ju, Kyong-Sik [1 ]
Jang, In-Ho [2 ]
Choe, Yong-A. [1 ]
Ri, Song-Chun [1 ]
Pak, Hyon-Tae [2 ]
Hong, Su-Ok [3 ]
机构：
[1] Kim Il Sung Univ, High Tech Res & Dev Ctr, Pyongyang, North Korea
[2] Kim Il Sung Univ, Fac Chem, Pyongyang, North Korea
[3] Kim Il Sung Univ, Digital Lab, Pyongyang, North Korea
来源：
RSC ADVANCES | 2022年 / 13卷 / 01期
基金：
中国国家自然科学基金;
关键词：
OXIDATION; ELECTROCATALYSTS; ACID; METHANOL; PTRU/C;
D O I：
10.1039/d2ra06989j
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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 similar to 7% and similar to 12%, respectively, which reveal that the presence of copper enhances the complete ethanol oxidation to CO2.
引用
收藏
页码：448 / 455
页数：8
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