Citation: WAN Zhao-Min, WEI Xing, PENG Wei, YIN Zheng-Lei, XIAO Li, ZHUANG Lin. On-Line Electrochemical Transmission Infrared Spectroscopic Study of Pb²⁺ Enhanced C―C Bond Breaking in the Ethanol Oxidation Reaction[J]. Acta Physico-Chimica Sinica, ;2016, 32(6): 1467-1472. doi: 10.3866/PKU.WHXB201604144 shu

On-Line Electrochemical Transmission Infrared Spectroscopic Study of Pb²⁺ Enhanced C―C Bond Breaking in the Ethanol Oxidation Reaction

Hubei Key Laboratory of Electrochemical Power Sources, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China

Received Date: 1 March 2016
Revised Date: 14 April 2016

Fund Project: The project was supported by the National Natural Science Foundation of China (91545205).

Direct ethanol fuel cell (DEFC) has received much attention because of its high energy density, environmental friendliness, and low toxicity. Mechanism studies have focused on improving the breaking ratio of the C―C bond during the ethanol oxidation reaction (EOR). We establish an on-line electrochemical transmission infrared spectroscopic (ETIRS) method for electrochemical reactions. The new method is applied to study the effect of the addition of Pb²⁺ on the EOR catalyzed by Pt in an alkaline solution. We perform a series of electrochemical experiments at different temperatures, different catalyst loadings, and different potentials. The addition of Pb²⁺ is shown to improve the reaction rate of EOR in each experiment. Additionally, the anodic current becomes more stable with Pb²⁺ addition in the solutions. By using ETIRS, the products of the EOR are detected. The results show that the current efficiency of the carbonate is obviously higher in the presence of Pb²⁺ than that without Pb²⁺. This indicates that Pb²⁺ may improve the breaking ratio of the C―C bond during the EOR, which results in an increase of the EOR current.
- Ethanol electrooxidation,
- Alkaline medium,
- C―C bond breaking,
- Pb²⁺ additive,
- Transmission infrared spectroscopy
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On-Line Electrochemical Transmission Infrared Spectroscopic Study of Pb2+ Enhanced C―C Bond Breaking in the Ethanol Oxidation Reaction

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通讯作者: 陈斌, bchen63@163.com

On-Line Electrochemical Transmission Infrared Spectroscopic Study of Pb²⁺ Enhanced C―C Bond Breaking in the Ethanol Oxidation Reaction