聚乙烯吡咯烷酮稳定的钯纳米粒子催化加氢(英文)  

Platinum Nanoparticles Stabilized by Polyvinylpyrrolidone for Hydrogenation

作　　者：Nelly ZAKARINA Essen BEKTUROV 

机构地区：[1]D.V. Sokolsky Institute of Organic Catalysis and Electrochemistry [2]A.B. Bekturov Institute of Chemistry Sciences

出　　处：《催化学报》2008年第11期1165-1168,共4页

基　　金：Supported by the Ministry of Education and Science of Republic Kazakhstan

摘　　要：Nanosized colloidal platinum was prepared by reduction of H2PtCl6 in methanol-water mixture by refluxing. The particle size and morphology were characterized by transmission electron microscopy and electron diffraction. The influence of polyvinylpyrrolidone (PVP) molecular mass (MM),PVP concentration,and reduction time on platinum particle size was investigated. Small (1-2 nm) Pt particles are formed in the case of PVP with MM=1.2×104. With increasing polymer MM and decreasing polymer concentration,large aggregates from small particles appear. High catalytic activity of the obtained colloidal platinum in hydrogenation of acetylene compounds is shown. The effect of Pt particle size on the catalytic activity was studied.Nanosized colloidal platinum was prepared by reduction of H2PtCl6 in methanol-water mixture by refluxing. The particle size and morphology were characterized by transmission electron microscopy and electron diffraction. The influence of polyvinylpyrrolidone （PVP） molecular mass （MM）, PVP concentration, and reduction time on platinum particle size was investigated. Small （1 -2 nm） Pt particles are formed in the case of PVP with MM = 1.2 × 10^4. With increasing polymer MM and decreasing polymer concentration, large aggregates from small particles appear. High catalytic activity of the obtained colloidal platinum in hydrogenation of acetylene compounds is shown. The effect of Pt particle size on the catalytic activity was studied.

关 键 词：铂纳米粒子 稳定性 加氢工艺 聚乙烯 吡咯烷酮 化学分析 

分 类 号：TB383.1[一般工业技术—材料科学与工程]