科研之友
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摘要
The behaviour of various inert and soluble anode materials has been studied in a weakly acidic chloride electrolyte for deposition of Pd-Ni alloys. Inert anodes studied were graphite, and platinum, while the soluble ones were palladium and nickel. The possible preparation of a combined Pd-Ni anode is examined. The processes occurring on the anode are identified. The evolution of chlorine and oxygen is considered to be undesirable. The effects of the anode material, pH and temperature on the rate of chlorine and oxygen evolution have been studied by recording the polarisation curves under potentio-dynamic regime as a function of potential scan rate. The most suitable anode materials prove to be platinum and ruthenium oxide (OPTA). The use of combined Pd-Ni anodes is not recommended, since a third undesirable reaction also occurs on these, that of oxidation of ethylenediamine. Methods for elimination of the undesirable, side anode processes are proposed with a view to improving stable operation of the electrolyte.
- 出版日期2007-5
- 单位北京化工大学
