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Citation: Xie Yang, Jiang Xiong. Cathodic Reduction of Antimonyl Ions(SbO⁺)[J]. Acta Physico-Chimica Sinica, ;1991, 7(03): 354-357. doi: 10.3866/PKU.WHXB19910319 shu

Cathodic Reduction of Antimonyl Ions(SbO⁺)

Xie Yang ,
Jiang Xiong

1.
Department of Chemistry, South China Normal University, Guangzhou 510631

Received Date: 11 January 1990
Available Online: 15 June 1991

The cathodic reduction of SbO~+ ions in sodium sulphate solution at pH 4.0 has been investigated using potentiodynamic polarization at rotating disc electrode (RDE), rotating ring disc electrode(RRDE) and AC impedance techniques. Results show that SbO~+ ions can be eventually reduced to stibine SbH_3 through a 6-electron process, whose formation is confirmed by RRDE experiments. The reduction is diffusioncontrolled at potentials negative to -1.28 V. The values of the diffusion coefficient of SbO~+ ions calculated on the basis of the experimental results for 3-electron and 6-electron reduction are very consistent; they are (1.45±0.15)×10~(-6) cm~2·s~(-1) and (1.47±0.15)×10~(-6) cm~2·s~(-1), respectively.
- Antimonyl ion; Stibine; Cathodic reduction; Diffusion coefficient; Activator
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Cathodic Reduction of Antimonyl Ions(SbO⁺)