Acta Phys. -Chim. Sin. ›› 1989, Vol. 5 ›› Issue (06): 652-656.doi: 10.3866/PKU.WHXB19890603

• ARTICLE • Previous Articles     Next Articles

IN-SITU FTIR REFLECTION-ABSORPTION SPECTROSCOPIC STUDIES OF CYANIDE AND THIOCYANATE ON COPPER ELECTRODE

Zhang Jiujun; Lu Juntao; Cha Chuansin; Feng Zigang   

  1. 武汉大学化学系; 武汉大学分析测试中心
  • Received:1988-04-25 Revised:1988-11-02 Published:1989-12-15
  • Contact: Zhang Jiujun

Abstract:

The behaviors of cyanide and thiocyanate on copper electrode were studied using cyclic voltammetry and in-situ FTIR spectroelectrochemistry. When potential was shifted from -1.60 to 0.30V(vs.SCE), three bands near 2076, 2094, and 2170 cm~(-1) were recorded within the wavenumber range 2030—2230 cm~(-1) in 0.5 molL~(-1) NaCN+0.5 molL~(-1) NaF. The bands near 2070 and 2170cm~(-1) were due to solution species CN~- and surface deposited CuCN respectively. The band near 2094 cm~(-1) was attributed to absorbed CN~- and complex Cu(CN)_3~(2-). In 0.5 mol L~(-1) NaSCN+0.5 mol L~(-1) NaF, three bands near 2060, 2117 and 2170 cm~(-1) were observed in the potential range metioned above, and attributed to the IR absorption of solution species SCN~- (2060 cm~(01)), absorbed SCN~- (2117 cm~(-1)) and CuNCS (2170 cm~(-1)) which was the product of electrode reaction.