Selective alcohol oxidation to aldehydes and ketones over base-promoted gold-palladium clusters as recyclable quasihomogeneous and heterogeneous metal catalysts
Selective alcohol oxidation to aldehydes and ketones over base-promoted gold-palladium clusters as recyclable quasihomogeneous and heterogeneous metal catalysts
复制标题
DOI：
10.1016/j.molcata.2009.07.017
复制
发表时间：
2009-11-02
影响因子：
--
通讯作者：
De Vos, D. E.
中科院分区：
文献类型：
--
作者：
Mertens, P. G. N.;Corthals, S. L. F.;De Vos, D. E.
双金属金-钯簇合物，平均尺寸为1.9 nm，由80摩尔%的金，被证明是高活性和选择性的金属催化剂的有机相氧化与O2的脂肪族，烯丙基和苄醇相应的羰基产物。聚乙烯吡咯烷酮稳定的金-钯簇分散在N，N-二甲基甲酰胺出现作为有前途的准均相金属催化剂氧化苯甲醇苯甲醛与全选择性，它们可以有效地回收与不受影响的催化性能耐溶剂的纳滤。通过将优化的金-钯簇定量固定在高比表面积碱性BaAl 2 O 4尖晶石载体上，并保留金-钯簇的纳米分散性，制备了用于酰胺相或无溶剂醇氧化的高活性和耐久性的多相催化剂。(C)2009 Elsevier B. V.保留所有权利。
Bimetallic gold-palladium clusters, with an average size of 1.9 nm and composed of 80 mol% gold, proved to be highly active and selective metal catalysts for the organic phase oxidation with 02 of aliphatic, allylic and benzylic alcohols to the corresponding carbonyl products. Polyvinyl pyrrolidone stabilized gold-palladium clusters dispersed in N,N-dimethylformamide emerged as promising quasi homogeneous metal catalysts for the oxidation of benzyl alcohol to benzaldehyde with full selectivity; they could be efficiently recycled with unaffected catalytic performance by solvent-resistant nanofiltration. Highly active and durable heterogeneous catalysts for the amide phase or solvent-free alcohol oxidation were prepared by the quantitative immobilization of the optimized gold-palladium clusters on the high surface area basic BaAl2O4 spinel support with preservation of the bimetallic clusters' nanodispersion. (C) 2009 Elsevier B.V. All rights reserved.