摘要
采用极谱和循环伏安法,研究过渡金属杂多钨磷酸盐K_x[P_2W_(17)ZO_(62)]·nH_2O(Z=Ti^(4+),Mn^(2+),Fe^(3+),Co^(2+),Ni^(2+),Cu^(2+),简写为P_2W_(17)Z)在溶液中的氧化还原性质,发现杂多阴离子的第一极谱半波还原电位E_(1/2)的顺序为Cu^(2+)>Ni^(2+)>Co^(2+)>Fe^(2+)>Mn^(2+)。分析了循环伏安峰电位与pH的关系,提出了它们的还原机理,讨论了过渡元素对杂多阴离子氧化还原性质的影响。
The redox properties of transition metals triheteropoly tungstophosphates KX[P2W17 ZO62] nH2O(Z = Ti4+ ,Mn2+ ,Fe3+ ,Co2+ ,Ni2+ and Cu2+ ,abbreabbrev to P2W17Z)in solution were studied by polarography and cyclic voltammetry ,and it was found that the order of the polarographic halfwave potentials Dt/2: of these heteropoly anions was:Z = Cu2+>Ni2+>Co2+>Fe2+>Mn2+. The relationship between the cyclic voltammogrammetric peak potentials and pH was analyzed and the reduction mechanism was proposed and the effect of transition metals on the redox properties of the heteropoly anions were discussed in this paper.
出处
《湖北大学学报（自然科学版）》
CAS
1993年第1期70-74,共5页
Journal of Hubei University：Natural Science
关键词
DAWSON结构
过渡金属
钨磷酸盐
Dawson structure Transition metals Tungstophosphate Redox
