Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (02): 201-204.doi: 10.1016/S1872-1508(08)60010-8

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Electrochemical Behavior of Irreversibly Adsorbed Sb on Au Electrode

WU Qi-Hui; ZHEN Chun-Hua; ZHOU Zhi-You; SUN Shi-Gang   

  1. Department of Physics, Xiamen University, Xiamen 361005, Fujian Province, P. R. China; State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, Xiamen University, Xiamen 361005, Fujian Province, P. R. China
  • Received:2007-07-22 Revised:2007-12-05 Published:2008-01-26
  • Contact: WU Qi-Hui; SUN Shi-Gang;

Abstract: The electrochemical processes of irreversibly adsorbed antimony (Sbad) on Au electrode were investigated by cyclic voltammetry (CV) and electrochemical quartz crystal microbalance (EQCM). CV data showed that Sbad on Au electrode yielded oxidation and reduction features at about 0.15 V (vs saturated calomel electrode, SCE). EQCM data indicated that Sbad specieswere stable on Au electrode in the potential region from-0.25 to 0.18 V (vs SCE); the adsorption of Sb inhibited the adsorption of water and anion on Au electrode at low electrode potentials. Sb2O3 species was suggested to form on the Au electrode at 0.18 V. At a potential higher than 0.20 V the Sb2O3 species could be further oxidized to Sb(V) oxidation state and then desorbed fromAu electrode.

Key words: EQCM, Sb adsorption, Au electrode


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