氢具有使贵金属离子还原成金属状态的能力。已研究从溶液中用H_2回收铂、铑、及钯。对单个贵金属溶液已测定温度、压力、气体组成、酸的性质和浓度的影响。为求得一些典型溶液的参数,也研究了由贵金属络合物和氨,氰化物,醋酸盐及硝酸盐等添加剂组成的更复杂溶液。从所获得的动力学数据提出一种还原机理。 Hydrogen has the ability to reduce noble metal ions to the metallic state. The recovery of platinum, rhodium, and palladium from solution using H2 has been studied. The effects of temperature, pressure, gas composition, acid nature and concentration have been determined on a single precious metal solution. In order to obtain the parameters of some typical solutions, more complex solutions consisting of noble metal complexes and additives such as ammonia, cyanide, acetate and nitrate were also investigated. A reduction mechanism was proposed from the kinetic data obtained.