Selective oxidation of glucose versus CO oxidation over supported gold catalysts

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• 作者：Timea Benk&#xf3 ; Andrea Beck ; Olga Geszti ; R&#xf3 ; bert Katona ; Antal Tungler ; Krisztina Frey ; Lá ; szl&#xf3 ; Guczi ; Zoltá ; n Schay
• 关键词：Gold catalysts ; Glucose oxidation ; CO oxidation
• 刊名：Applied Catalysis A: General
• 出版年：2010
• 出版时间：20 November 2010
• 年：2010
• 卷：388
• 期：1-2
• 页码：31-36
• 全文大小：624 K

文摘

Two series of gold catalysts supported on TiO₂, SiO₂, and CeO₂ have been prepared by colloidal gold deposition with 2 wt % of nominal gold loading. The diameter of gold particle stabilized by polyvinylalcohol (PVA) or by tannic acid-citrate was 2–3 nm and 6–7 nm, which increased to 5–7 nm and 7–13 nm, respectively, after calcination in air. Catalytic activities were investigated and compared in CO oxidation and glucose oxidation reactions. Inverse correlation was found between the activities in glucose oxidation and CO oxidation suggesting that the mechanisms are different. Besides the high dispersion the nature of the support seems to play a significant role in the liquid phase reaction.