A novel on-line electrochemical transmission infrared spectroscopy to study the current efficiency of carbonates for ethanol oxidation reactions in alkaline media

doi:10.1016/j.jechem.2019.01.008

能源化学(英文版) ›› 2019, Vol. 38 ›› Issue (11): 78-83.DOI: 10.1016/j.jechem.2019.01.008

A novel on-line electrochemical transmission infrared spectroscopy to study the current efficiency of carbonates for ethanol oxidation reactions in alkaline media

Wei Peng, Li Xiao, Juntao Lu, Lin Zhuang

Hubei Key Lab of Electrochemical Power Sources, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, China

收稿日期:2018-09-05 修回日期:2019-01-02 出版日期:2019-11-15 发布日期:2020-12-18
通讯作者: Li Xiao, chem.lily@whu.edu.cn; Lin Zhuang, lzhuang@whu.edu.cn
基金资助:
This work was supported by the National Natural Science Foundation of China (21421001, 21573115), the 111 project (B12015), the Fundamental Research Funds for the Central Universities (63185015), and the Foundation of State Key Laboratory of Highefficiency Utilization of Coal and Green Chemical Engineering (2017-K13).

A novel on-line electrochemical transmission infrared spectroscopy to study the current efficiency of carbonates for ethanol oxidation reactions in alkaline media

Wei Peng, Li Xiao, Juntao Lu, Lin Zhuang

Hubei Key Lab of Electrochemical Power Sources, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, China

Received:2018-09-05 Revised:2019-01-02 Online:2019-11-15 Published:2020-12-18
Contact: Li Xiao, chem.lily@whu.edu.cn; Lin Zhuang, lzhuang@whu.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (21421001, 21573115), the 111 project (B12015), the Fundamental Research Funds for the Central Universities (63185015), and the Foundation of State Key Laboratory of Highefficiency Utilization of Coal and Green Chemical Engineering (2017-K13).

摘要/Abstract

摘要： Research on the reaction mechanism of ethanol oxidation reaction (EOR) is important for the development of highly active EOR electro-catalysts. One of the main difficulties in the EOR study is the quantitative analysis of the non-volatile products. Conventional on-line electrochemical flowing transmission infrared spectroscopy (ETIRS) can only collect a part of the carbonate products of EOR in alkaline media, making the further quantitative study impossible. Herein, a new ETIRS system has been designed and prepared by employing a cation-exchange membrane (Nafion) in the sampling hood. The using of the Nafion membrane can prevent the anions crossing over by confining the generated carbonates in the sampling hood without diffusing into the bulk electrolyte. Therefore, the collection efficiency of the carbonate products as well as the test accuracy of the carbonate current efficiency has been significantly improved. The result of CO stripping reaction shows that ca. 100% of the carbonate product is able to be collected in alkaline media by this new system. The influence of the experimental temperature to the carbonate current efficiency has been further studied on Pt/C toward EOR in alkaline media.

关键词: Ethanol oxidation reaction, Transmission infrared spectroscopy, Platinum, Alkaline media

Abstract: Research on the reaction mechanism of ethanol oxidation reaction (EOR) is important for the development of highly active EOR electro-catalysts. One of the main difficulties in the EOR study is the quantitative analysis of the non-volatile products. Conventional on-line electrochemical flowing transmission infrared spectroscopy (ETIRS) can only collect a part of the carbonate products of EOR in alkaline media, making the further quantitative study impossible. Herein, a new ETIRS system has been designed and prepared by employing a cation-exchange membrane (Nafion) in the sampling hood. The using of the Nafion membrane can prevent the anions crossing over by confining the generated carbonates in the sampling hood without diffusing into the bulk electrolyte. Therefore, the collection efficiency of the carbonate products as well as the test accuracy of the carbonate current efficiency has been significantly improved. The result of CO stripping reaction shows that ca. 100% of the carbonate product is able to be collected in alkaline media by this new system. The influence of the experimental temperature to the carbonate current efficiency has been further studied on Pt/C toward EOR in alkaline media.

Key words: Ethanol oxidation reaction, Transmission infrared spectroscopy, Platinum, Alkaline media

Wei Peng, Li Xiao, Juntao Lu, Lin Zhuang. A novel on-line electrochemical transmission infrared spectroscopy to study the current efficiency of carbonates for ethanol oxidation reactions in alkaline media[J]. 能源化学(英文版), 2019, 38(11): 78-83.

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A novel on-line electrochemical transmission infrared spectroscopy to study the current efficiency of carbonates for ethanol oxidation reactions in alkaline media

A novel on-line electrochemical transmission infrared spectroscopy to study the current efficiency of carbonates for ethanol oxidation reactions in alkaline media

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