Synthesis of Ag, CeO2, Ag-CeO2 Nanoparticles and Their Applications in Catalytic CO Oxidation

doi:10.7503/cjcu20120340

Abstract

Abstract:

CeO₂ and Ag nanoparticles and Ag-CeO₂nanocomposites were systematically prepared. The structures of the catalysts and the catalytic activity for CO oxidation were studied. The results indicate that the catalytic activity of Ag is rather poor. The highest conversion of CO oxidation was only 40%, and smaller particles led to the worsening of the catalytic activity; for CeO₂ nanoparticles, the conversion of CO oxidation could be as high as 100%, while the reaction temperature was relatively high(ca. 350℃). Compared with CeO₂ and Ag nanoparticles, Ag-CeO₂ nanocomposites showed a markedly enhanced catalytic property: CO can be completely oxidized to CO₂ at temperature as low as 150℃. The excellent catalytic performance of the Ag-CeO₂ nanocomposites is due to the interactions between Ag and CeO₂ in nanocomposites. We discussed the relevant catalytic processes using temperature-programmed reduction (TPR) technology.

Key words: Cerium dioxide(CeO₂), Nano catalytic material, Hydrothermal synthesis, CO catalytic oxidation

CLC Number:

O646
O614

TrendMD:

CHEN Jing, HUANG Xin-Song, LI Guang-She. Synthesis of Ag, CeO₂, Ag-CeO₂ Nanoparticles and Their Applications in Catalytic CO Oxidation[J]. Chem. J. Chinese Universities, 2013, 34(1): 155.

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Synthesis of Ag, CeO₂, Ag-CeO₂ Nanoparticles and Their Applications in Catalytic CO Oxidation

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