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Mechanism of Gold Activation in Supported Gold Catalysts for CO Oxidation

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Abstract

Based on the structure of characterization of Au/Fe2O3 catalysts, the mechanism of gold activation in supported gold catalysts was proposed as follow:

$${Au}^{{3 + }} \;{d}^{8} 6{s}^{0} ({catalyst precursor})\xrightarrow{{{activation treatment}}}{Au}^{{\delta + }} \;{d}^{{10 - \delta }} 6{s}^{1} ({catalyst})$$

The possible catalytic active state is the partially oxidized gold (Auδ+) with unoccupied outer d orbitals, similar to the outer d orbital structure of Pt. Thus "inert" gold can become very active for CO oxidation.

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Authors
  1. Zhengping Hao
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  2. Lidun An
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  3. Hongli Wang
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  4. Tiandou Hu
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Hao, Z., An, L., Wang, H. et al. Mechanism of Gold Activation in Supported Gold Catalysts for CO Oxidation. Reaction Kinetics and Catalysis Letters 70, 153–160 (2000). https://doi.org/10.1023/A:1010383220836

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