摘要
发展了用正电子湮没寿命参数测定用共沉淀方法制备的金属氧化物系固溶度的新方法。测量了一系列用共沉淀方法制备的不同CuO at％含量的CuO/ZnO甲醇合成催化剂粉末(压制成片)还原前后的正电子寿命谱。分析该种催化剂的固溶特性及其与正电子寿命参数的关系,得出还原后样品的固溶度为12CuOat％.支持了CuO/ZnO甲醇合成催化剂以Cu^+离子为活性中心的观点。
A new method was developed determining the solid solubility of a metal oxide series prepared by precipitation using the positron lifetime parameters. The positron lifetime spectra were measured of a seris of CuO/ZnO catalysts prepared by precipitation in which the CuO at% contents were different before and after reduced. The relations were obtained between the solid solubility of the catalysts and the positron lifetime parameters, from which a result of solid solubility of 12.CuO at% after reduced had been found. The viewpoint that the Cu+ ion acted as the active centre in the CuO /ZnO catalyst was supported.
出处
《核技术》
CAS
CSCD
北大核心
1989年第12期731-733,共3页
Nuclear Techniques
关键词
甲醇
合成
催化剂
活性
正电子湮没
Precipitation Methanol synthesis catalyst Solid solubility Active centre Positron annihilation
