摘要
聚合物固载Ｎｉ┐Ａｇ双金属催化剂Ⅰ．ＸＰＳ，ＸＲＤ和磁测定表征吴世华朱常英王连邦张松祯（南开大学化学系，天津３０００７１）关键词溶剂化金属原子，镍，银，双金属催化剂，聚合物，负载型催化剂近年来，聚合物负载催化剂的研究受到重视，但由于一般聚合物载体的热...
The solvated metal atom impregnation (SMAI) and conventional impregnation (CI) methods were used to prepare three different mole ratio D 72 immobilized Ni Ag bimetallic catalysts respectively. The results of XRD and magnetic measurement showed that the Ni and Ag particle size of SMAI catalysts was smaller than that of CI catalysts with the same metal content. Both SMAI and CI catalysts had superparamagnetism and no Ni Ag alloy formed. The results of XPS measurement showed that the content of Ni 0 and Ag 0 of SMAI catalysts was higher than that of CI catalysts. The Ni content on the surface was higher than in the bulk for the SMAI catalysts, i.e. Ni was enriched on the surface ,whereas the Ni content on the surface was nearly the same as in the bulk for CI catalysts.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
1996年第3期252-255,共4页
关键词
镍
银
催化剂
聚合物
分散度
还原度
Solvated metal atom, Nickel, Silver, Bimetallic catalyst, Polymer, Supported catalyst
