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电化学(中英文) ›› 2002, Vol. 8 ›› Issue (4): 376-380. 

• 研究论文 • 上一篇    下一篇

次亚磷酸根离子在铂电极上氧化的机理研究(英文)

蒋太祥,吴辉煌   

  1. 厦门大学化学化工学院,固体表面物理化学国家重点实验室,厦门大学化学化工学院,固体表面物理化学国家重点实验室 福建厦门361005 ,福建厦门361005
  • 收稿日期:2002-11-28 修回日期:2002-11-28 出版日期:2002-11-28 发布日期:2002-11-28

Mechanistic Study of Oxidation of Hypophosphite on Pt Electrodes by SNIFTIRS

JIANG Tai-xiang, WU Hui-huang *   

  1. (Dept. of Chem., State Key Lab. for Phys. Chem. of the Solid Surfaces,Xiamen Univ., Xiamen 361005, China
  • Received:2002-11-28 Revised:2002-11-28 Published:2002-11-28 Online:2002-11-28

摘要: 用SNIFTIRS和循环伏安法研究次亚磷酸根离子在多晶铂电极上的电氧化机理 .分析了0 .5mol/LH2 SO4 + 0 .1mol/LNaH2 PO2 溶液中原位红外反射谱图与Pt电极电位的关系 ,发现次亚磷酸根离子在Pt上发生解离吸附 ,其氧化产物是H3 PO4 ,不同于在Ni上的氧化产物H2 PO- 3 ,据此提出了酸性溶液中次亚磷酸根离子在Pt上氧化机理的新看法

关键词: 次亚磷酸根, 电氧化, 化学镀, 铂电极, SNIFTIRS

Abstract: The oxidation of hypophosphite on a polycrystalline platinum electrode was studied by SNIFTIRS and cyclic voltammetry, the in-situ IR spectra were analyzed as a function of Pt electrode potentials in the solution of 0.5 mol/L H 2SO 4+0.1 mol/L NaH 2PO 2. It was found that the dissociative adsorption of hypophosphite ions occurs on Pt surface, and the oxidation product is H 3PO 4, rather than H 2PO 3 - which was considered to produce on Ni electrodes, thereby a new insight into mechanism of hypophosphite oxidation on Pt in acidic media was provided.

Key words: Hypophosphite, Electro-oxidation, Electoless plating, Platinum electrode, SNIFTIRS

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