Synergetic effect of platinum or palladium on gold catalyst in the selective oxidation of D-sorbitol

被引：4
|
作者：
Nikolaos Dimitratos
Francesca Porta
Laura Prati
Alberto Villa
机构：
[1] Centre of Excellence CIMAINA,Dipartimento di Chimica Inorganica Metallorganica e Analitica e INSTM Unit
[2] Auricat Programme Università di Milano,undefined
来源：
Catalysis Letters | 2005年 / 99卷
关键词：
oxidation of polyols; sorbitol oxidation; bimetallic catalyst; gold/palladium; gold/platinum;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Monometallic Au, Pt and Pd on carbon catalysts show poor activity in the liquid phase oxidation of D-sorbitol to gluconic/gulonic acids. However, by using bimetallic based catalysts (Au–Pt or Au–Pd) a great enhancement in the activity has been observed with respect to all the monometallic catalysts tested probably due to a synergetic effect between Au and Pt or Pd. In fact physical mixture of monometallic catalysts presented poor activity. Bimetallic showed a resistance to poisoning by dioxygen and by reaction products as high as gold monometallic catalyst, but also an improved selectivity toward monooxidation with respect to monometallic.
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页码：181 / 185
页数：4
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