在制备硝酸的氨氧化装置中,Pd-Ni合金作为捕集网用来回收铂,化学分析、电子探针微区分析和X射线光电子能谱被用来测定使用不同时间的网试样的成份和表面状态变化与分布.Pt/Pd和Rh/Pd比值与试样所在位置与运行时间有关.在捕集网表面上主组元的化学状态是Pd°、PdO;Pt°、PtOads、PtO2;Rh2O3;Ni°、NiO.发现各层网表面上Pt/Pd比值与这些表面上PdO浓度成反比,讨论了1种新的铂回收机制.
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