摘要
应用溶剂化金属原子浸渍（ＳＭＡＩ）法制备了三种金属含量比不同的Ｐｄ－Ｃｕ／Ｃ双金属催化剂。经ＸＲＤ和ＴＥＭ测定结果表明，催化剂中Ｐｄ和Ｃｕ已形成合金，合金颗粒平均直径小于５ｎｍ。ＸＰＳ和Ａｕｇｅｒ谱说明Ｐｄ和Ｃｕ均以零价态存在。在亚异丙基丙酮（ＣＨ＿３）＿２Ｃ＝ＣＨＣＯＣＨ＿３加氢反应中，随着催化剂中Ｃｕ比例增加，催化活性增大，而生成六碳酮的选择性基本不变。
The solvated metal atom impregnation(SMAI)method was employed to Prepare three kind of Pd-Cu/C bimetallic catalysts with diffrent Pd/Cu ratios.The results of XRD and TEM measuments showed that Pd-Cu alloy was formed and the particle size of the alloy was very small,with average diameter<5.0nm.XPS and Auger spectra indicated that both Pd and Cu were in zero-valent state, As Cu contents increased,the catalytical activities of the catalysts in the hydrogenation of mesityl oxide increased, while the selectivities for 4-methyl-2-pentanone were essentially unchanged.
出处
《化学工业与工程》
CAS
1995年第3期15-19,共5页
Chemical Industry and Engineering
关键词
合成
催化剂
活性炭
金属原子浸渍
金属催化剂
s:metal vapor synthesis
Pd-Cu Catalyst
X-ray
photoelection spectroscopy
activated carbon
