次亚磷酸根离子在铂电极上氧化的机理研究(英文)  

Mechanistic Study of Oxidation of Hypophosphite on Pt Electrodes by SNIFTIRS

作　　者：蒋太祥[1] 吴辉煌[1] 

机构地区：[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,福建厦门361005

出　　处：《电化学》2002年第4期376-380,共5页Journal of Electrochemistry

基　　金：SupportedbyNationalScienceFundationofChina(No 2 0 0 730 35 )

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 。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.

关 键 词：次亚磷酸根离子 电氧化 铂电极 SNIFTIRS 氧化机理 循环伏安法 

分 类 号：O646[理学—物理化学]