Journal
APPLIED SURFACE SCIENCE
Volume 356, Issue -, Pages 24-29Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.08.006
Keywords
Carbon dioxide; Electrochemical reduction; Formate; Oxide layer; Tin electrode
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Funding
- Department of Education for the Fundamental Research Funds for the Central Universities, Jiangsu Province for the College graduate research and innovation projects [CXLX13_086]
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The importance of oxide layer on Sn electrode to the efficiency of CO2 reduction has been evaluated by comparing the activities of Sn electrodes treated via etching and annealing. In KHCO3 aqueous solution saturated with CO2, Sn electrode with a native oxide layer exhibits high catalytic activity for CO2 reduction, in contrast, Sn electrode which is etched in HCl solution to remove the oxide layer or treated by annealing exhibits lower activity for CO2 reduction. If the etched Sn electrode is exposed in the air over 24 h, its catalytic performance for CO2 reduction will restore, meanwhile, the electrolysis current density for this electrode is around 1.5-fold than that for a untreated Sn electrode because the etching treatment makes the electrode rough and behave a larger superficial area. (C) 2015 Elsevier B.V. All rights reserved.
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