Intermetallic Pt2Si：magnetron-sputtering preparation and electrocatalysis toward ethanol oxidation

doi:10.1016/S2095-4956(14)60145-5

能源化学(英文) ›› 2014, Vol. 23 ›› Issue (3): 265-268.DOI: 10.1016/S2095-4956(14)60145-5

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Intermetallic Pt₂Si：magnetron-sputtering preparation and electrocatalysis toward ethanol oxidation

Zhandong Ren, Li Xiao, Gongwei Wang, Juntao Lu, Lin Zhuang

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

收稿日期:2013-12-10 修回日期:2014-02-19 出版日期:2014-05-24 发布日期:2014-05-25
通讯作者: Li Xiao, Lin Zhuang
基金资助:
This work was supported by the National Basic Research Program (2012CB932800, 2012CB215503), the National Science Foundation of China (21125312, 21203142), and the Doctoral Fund of Ministry of Education of China (20110141130002).

Intermetallic Pt₂Si：magnetron-sputtering preparation and electrocatalysis toward ethanol oxidation

Zhandong Ren, Li Xiao, Gongwei Wang, Juntao Lu, Lin Zhuang

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

Received:2013-12-10 Revised:2014-02-19 Online:2014-05-24 Published:2014-05-25
Supported by:
This work was supported by the National Basic Research Program (2012CB932800, 2012CB215503), the National Science Foundation of China (21125312, 21203142), and the Doctoral Fund of Ministry of Education of China (20110141130002).

摘要/Abstract

摘要： Although most transition metals have been tested as the promoter to Pt for electrocatalysis toward fuel cell reactions, semi-conductor elements, such as Si, have hitherto not been examined. Here we report a simple synthesis of intermetallic Pt₂Si electrode using magnetron sputtering and the electrocatalysis toward ethanol oxidation reaction (EOR). In comparison to Pt, the intermetallic Pt₂Si surface turns out to be much more active in catalyzing the EOR: the onset potential shifts negatively by 150 mV, and the current density at 0.6 V increases by a magnitude of one order. Such an enormous enhancement in EOR catalysis is ascribed to the promotion effects of Si, which can not only provide active surface oxygenated species to accelerate the removal of CO_ads, but also strongly alter the electronic property of Pt, as clearly indicated by the core-level shift in XPS spectrum.

关键词: Pt₂Si, intermetallic compound, magnetron sputtering, electrocatalysis, ethanol oxidation

Abstract: Although most transition metals have been tested as the promoter to Pt for electrocatalysis toward fuel cell reactions, semi-conductor elements, such as Si, have hitherto not been examined. Here we report a simple synthesis of intermetallic Pt₂Si electrode using magnetron sputtering and the electrocatalysis toward ethanol oxidation reaction (EOR). In comparison to Pt, the intermetallic Pt₂Si surface turns out to be much more active in catalyzing the EOR: the onset potential shifts negatively by 150 mV, and the current density at 0.6 V increases by a magnitude of one order. Such an enormous enhancement in EOR catalysis is ascribed to the promotion effects of Si, which can not only provide active surface oxygenated species to accelerate the removal of CO_ads, but also strongly alter the electronic property of Pt, as clearly indicated by the core-level shift in XPS spectrum.

Key words: Pt₂Si, intermetallic compound, magnetron sputtering, electrocatalysis, ethanol oxidation

Zhandong Ren, Li Xiao, Gongwei Wang, Juntao Lu, Lin Zhuang. Intermetallic Pt₂Si：magnetron-sputtering preparation and electrocatalysis toward ethanol oxidation[J]. 能源化学(英文), 2014, 23(3): 265-268.

Zhandong Ren, Li Xiao, Gongwei Wang, Juntao Lu, Lin Zhuang. Intermetallic Pt₂Si：magnetron-sputtering preparation and electrocatalysis toward ethanol oxidation[J]. Journal of Energy Chemistry, 2014, 23(3): 265-268.

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Intermetallic Pt₂Si：magnetron-sputtering preparation and electrocatalysis toward ethanol oxidation

Intermetallic Pt₂Si：magnetron-sputtering preparation and electrocatalysis toward ethanol oxidation

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