Abstract

The processes of contact reaction of nickel metal powders with aggregated particle sizes of 300–400 nm with aqueous solutions of palladium(II) in autoclaves at elevated temperatures in acidic and alkaline media have been studied. It has been found that when metallic nickel contacts with aqueous solutions of palladium(II) chloride in 0.01 M hydrochloric acid at temperatures of 100 and 130°C for 15 min, the concentration of divalent palladium ions decreases to zero. The process is accompanied by a partial transition of nickel into solution. The precipitates are a mixture of metallic particles of nickel and palladium of variable compositions. In the case of contact of metallic nickel with solutions of tetraammine palladium(II) chloride at temperatures of 160 and 170°C in a medium of 0.1 M potassium hydroxide, metal palladium particles 5–25 nm in size are formed on the surface of larger nickel particles. The structure of bimetallic particles has been determined by X-ray photoelectron microscopy.

中文翻译：

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高分散镍金属粉末与 Pd(II) 水溶液在水热条件下的反应

 抽象的

研究了聚集粒径为300~400 nm的镍金属粉末与钯(II)水溶液在高压釜中在酸性和碱性介质中高温接触反应的过程。研究发现，当金属镍与氯化钯(II)的0.01 M盐酸水溶液在100和130℃的温度下接触15分钟时，二价钯离子的浓度降至零。该过程伴随着镍部分转变为溶液。沉淀物是不同成分的镍和钯金属颗粒的混合物。在 160 和 170°C 温度下，在 0.1 M 氢氧化钾介质中，金属镍与氯化四氨合钯 (II) 溶液接触，在较大的表面上形成尺寸为 5-25 nm 的金属钯颗粒。镍颗粒。双金属颗粒的结构已通过X射线光电子显微镜测定。