摘要
分析归纳文献中铂族金属的各种半电池反应的E°值。对于还原到金属态的E°半电池反应,轻铂族的E°值低于重铂族;对于从高价态还原E°到低价态的半电池反应,轻铂族的E°值高于重铂族;从水合离子的还原到配离子的还原,E°值降低,配体愈“软”,降低幅度愈大。本文用实验现象和结果从理论上解释了这些规律。
The standard electrode potentials E°of half cell reaction of platinum group metals cited in literatures are analyzed and classified as light and heavy platinum group metals. Some rules are summarised as following. the values E° of light platinum group metals are lower than that of heavy platinum group metals for the reduction reaction of complex ions of platinum group metals to metallic state, but the Values E° of light platinum group metals are higher than that of heavy platinum group metals for reduction reaction of the complex ions with higher valence to the complex ions with lower valence. When comparing the electrode potentials of the hydrated ions with the complex ions containing other ligands, the values E°of the latter are lower than that of the former, and more 'soft' the ligands, larger difference the electrode potentials. The author explained thioritically the above rules as well.
出处
《贵金属》
CAS
CSCD
北大核心
1991年第1期7-16,共10页
Precious Metals
关键词
铂族
金属
氧化
还原
反应动力学
Platinum group metals, Redox reaction, Reaction kinetics, Thermodynamics
