Electrochemical and Spectroscopic Studies of Ethanol Oxidation on Nano-Cubic Pt Modified by Tin Adatoms

Authors

Lu RAO, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Bin-wei ZHANG, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Yan-yan LI, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Yan-xia JIANG, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;Follow
Shi-gang SUN, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;

Corresponding Author

Yan-xia JIANG(yxjiang@xmu.edu.cn)

Abstract

The nano-cubic Pt modified by tin (Sn) was synthesized and used to investigate the role of this adatom played in the ethanol oxidation. The onset potential of ethanol oxidation was significantly shifted negatively which can be forward about 300 mV when the coverage of Sn (θSn)was 0.9. The electrtochemical in situ FTIR result demonstrated that the amount of CO2 increased first, and then decreased with θSn increased, and reached the maximun when θSn was 0.38. Furthermore, the formation of acetic acid could be observed at very low potential (-0.05 V) after modifying Sn adatom, and the amount of acetic acid increased with θSn increased. That is, Sn deposited on Pt surfaces has a double effect on the ethanol oxidation. First, it facilitates the oxidation of CO coming from the cleavage of the C—C bond in ethanol by a bifunctiontal mechanism. Second, the Pt–Sn ensemble catalyzes the oxidation of ethanol to acetic acid. This means that the main product in the oxidation of ethanol for the Pt–Sn system should be acetic acid unless the Pt surface structure has some special sites able to break the C—C bond.

Graphical Abstract

Keywords

tin modified, nano-cubic Pt, ethanol, electrocatalysis, in situ FTIR

DOI Link

https://doi.org/10.13208/j.electrochem.131177

Publication Date

2014-10-28

Online Available Date

2014-04-27

Revised Date

2014-04-22

Received Date

2014-02-19

Recommended Citation

Lu RAO, Bin-wei ZHANG, Yan-yan LI, Yan-xia JIANG, Shi-gang SUN. Electrochemical and Spectroscopic Studies of Ethanol Oxidation on Nano-Cubic Pt Modified by Tin Adatoms[J]. Journal of Electrochemistry, 2014 , 20(5): 395-400.
DOI: 10.13208/j.electrochem.131177
Available at: https://jelectrochem.xmu.edu.cn/journal/vol20/iss5/1

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