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Citation: Chen Guo-Liang, Lin Heng, Zheng Xing-Hong, Chen Sheng-Pei, Sun Shi-Gang. Oxidation of n-propyl Alcohol on Pt and Sb,S Modified Pt Electrodes Using CV ＆ EQCM[J]. Acta Physico-Chimica Sinica, ;2002, 18(02): 147-151. doi: 10.3866/PKU.WHXB20020211 shu

Oxidation of n-propyl Alcohol on Pt and Sb,S Modified Pt Electrodes Using CV ＆ EQCM

1.
Department of Chemistry,Zhangzhou Normal College,Zhangzhou　363000;State Key Laboratory for Physical Chemistry of Solid Surfaces,Department of Chemistry,Xiamen University,Xiamen　361005

Received Date: 7 August 2001
Available Online: 15 February 2002

The adsorption and oxidation of n-propyl alcohol on Pt and Pt modified with saturated adsorped Sb and S (Pt/Sbad and Pt/Sad ) electrodes were studied using cyclic voltammetry and electrochemical quartz crystal microbalance (EQCM).The results demonstrated that the oxidation of n-propyl alcohol depends strongly on the oxidation states of the electrode surface.Sb adatoms on Pt surface can adsorb oxygen at relatively low potentials,and exhibit catalytic effects for n-propyl alcohol oxidation.In comparison with n-propyl alcohol oxidation at a Pt electrode,the oxidation peak potential of n-propyl alcohol on Pt surface modified with saturated Sbad was negatively shifted about 290 mV and the peak current was doubly increased.In contrary,the oxidation of S adatoms consumes oxygen species of Pt electrode surface.Consequently,the oxidation of n-propyl alcohol was inhibited on Pt surface modified with Sbad in saturation.The EQCM studies provided quantitative results of surface mass changes during n-propyl alcohol oxidation,and have thrown new light in elucidating different effects of adatoms Sbad and Sad on Pt electrode surface towards n-propyl alcohol oxidation.
- Electrochemical quartz crystal microbalance(EQCM);Pt;Sbad;Sad;n-propyl alcohol;yclic voltammetry(CV)
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