Layered double hydroxide confined Au colloids: High performance catalysts for low temperature CO oxidation

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• 作者：Liang Li ; Qian Chen ; Qian Zhang ; Jingjing Shi ; Yongsheng Li ; Wenru Zhao ; Jianlin Shi
• 关键词：CO oxidation ; Noble metal ; Layered double hydroxide
• 刊名：Catalysis Communications
• 出版年：2012
• 出版时间：5 September, 2012
• 年：2012
• 卷：26
• 期：Complete
• 页码：15-18
• 全文大小：723 K

文摘

A LDH confined Au nano-catalyst has been successfully synthesized through a flocculation and in-situ reduction method. In this composite, Au nano-colloids were evenly dispersed in LDH gallery and its particle size was less than 1 nm. The highly dispersed gold nano-colloids in layered Mg¨DAl double hydroxide support were found to be a high performance catalyst for CO lower temperature oxidation. The catalytic experiments indicated that the CO oxidation reaction could be initiated at lower than ? 30 ¡ãC and almost a 100 % conversion can be achieved at 0 ¡ãC. The catalyst stability studies show that after 12 h reaction at 0 ¡ãC; the CO conversion has not any apparent decrease.