Au-Cu alloy nanoparticles supported on silica gel as catalyst for CO oxidation: Effects of Au/Cu ratios

Xiaoyan Liu, Aiqin Wang, Tao Zhang, Dang Sheng Su, Chung Yuan Mou

研究成果: 雜誌貢獻文章同行評審

114 引文 斯高帕斯(Scopus)

摘要

Au-Cu bimetallic catalysts with Au/Cu ratios ranging from 3/1 to 20/1 were prepared on silica gel support by a two-step method. The catalysts were characterized by ICP, XRD and TEM. The results showed that, irrespective of Au/Cu ratios, all the bimetallic nanoparticles had significantly reduced particle sizes (3.0-3.6 nm) in comparison with monometallic gold catalysts (5.7 nm). Both CO oxidation and PROX reactions were employed to evaluate the catalytic activities of Au-Cu bimetallic catalysts. For CO oxidation, the alloy catalysts show non-monotonic temperature dependence showing a valley in the intermediate temperature range. The catalyst with Au/Cu ratio of 20/1 gave the highest activity at room temperature, but its activity showed the deepest valley with increasing the reaction temperature. On the other hand, the catalyst with Au/Cu ratio of 3/1 exhibited the best performance for PROX reaction. For the Au/Cu ratios investigated, the bimetallic catalysts showed superior performance to monometallic gold catalysts, demonstrating the synergy between gold and copper.

原文英語
頁(從 - 到)103-108
頁數6
期刊Catalysis Today
160
發行號1
DOIs
出版狀態已發佈 - 2月 2 2011
對外發佈

ASJC Scopus subject areas

  • 催化
  • 化學 (全部)

指紋

深入研究「Au-Cu alloy nanoparticles supported on silica gel as catalyst for CO oxidation: Effects of Au/Cu ratios」主題。共同形成了獨特的指紋。

引用此