物理化学学报 >> 2008, Vol. 24 >> Issue (02): 201-204.doi: 10.1016/S1872-1508(08)60010-8

研究论文 上一篇    下一篇

Sb在Au电极上不可逆吸附的电化学过程

吴启辉; 甄春花; 周志有; 孙世刚   

  1. 厦门大学物理系, 福建 厦门 361005; 厦门大学化学系物理化学固体表面国家重点实验室, 福建 厦门 361005
  • 收稿日期:2007-07-22 修回日期:2007-12-05 发布日期:2008-01-26
  • 通讯作者: 吴启辉; 孙世刚 E-mail:qihui_wu@xmu.edu.cn; sgsun@xmu.edu.cn

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 E-mail:qihui_wu@xmu.edu.cn; sgsun@xmu.edu.cn

摘要: 用电化学循环伏安法和电化学石英晶体微天平(EQCM)技术研究了Sb在Au电极上不可逆吸附的电化学过程. 研究结果表明, 在-0.25 V到0.18 V(vs SCE)范围内, Sb可在Au电极上稳定吸附, 并且在0.15 V附近出现特征氧化还原峰. 根据EQCM实验数据, 在电位0.18 V时, Sb在Au电极上的氧化产物是Sb2O3; 同时Sb的吸附阻止了电解液中阴离子和水在Au电极上的吸附. 当电极电位超过0.20 V时, Sb2O3会被进一步氧化成Sb5+化合物, 同时逐渐从Au电极表面脱附.

关键词: 电化学石英晶体微天平, Sb吸附, Au电极

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

MSC2000: 

  • O646