Chinese Journal of Catalysis ›› 2016, Vol. 37 ›› Issue (10): 1608-1618.DOI: 10.1016/S1872-2067(16)62476-2

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Theoretical investigations on CO oxidation reaction catalyzed by gold nanoparticles

Keju Suna,b   

  1. a Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinghuangdao 066004, Hebei, China;
    b Gold Catalysis Research Center, State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
  • Received:2016-04-08 Revised:2016-05-29 Online:2016-10-21 Published:2016-10-22
  • Contact: Keju Sun
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21103165).

Abstract:

It is crucial to understand the mechanism of low temperature CO oxidation reaction catalyzed by gold nanoparticles so as to find out the origin of the high catalytic reactivity and extend the industrialization applications of nano gold catalysts. In this work, some theoretical works on CO adsorption, O2 adsorption, atomic oxygen adsorption, formation of surface gold oxide films, reaction mechanisms of CO oxidation involving O2 reaction with CO and O2 dissociation before reacting with CO on gold surfaces and Au/metal oxide were summarized, and the influences of coordination number, charge transfer and relativity of gold on CO oxidation reaction were briefly reviewed. It was found that CO reaction mechanism depended on the systems with or without oxide and the strong relativistic effects might play an important role in CO oxidation reaction on gold catalysts. In particular, the relativistic effects are related to the unique behav-iors of CO adsorption, O adsorption, O2 activation on gold surfaces, effects of coordination number and the wide gap between the chemical inertness of bulk gold and high catalytic activity of nano gold. The present work helps us to understand the CO oxidation reaction mechanism on gold catalysts and the influence of relativistic effects on gold catalysis.

Key words: Carbon monoxide oxidation reaction, Gold nanoparticle, Reaction mechanism, Theoretical calculation, Relativistic effect