Mechanism of Gold Activation in Supported Gold Catalysts for CO Oxidation期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Mechanism of Gold Activation in Supported Gold Catalysts for CO Oxidation

Authors:

Zhengping Hao Lidun An Hongli Wang Tiandou Hu

Affiliation:

(1) Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;(2) State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P.R. China;

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 (Au⁺) with unoccupied outer d orbitals, similar to the outer d orbital structure of Pt. Thus "inert" gold can become very active for CO oxidation.

Keywords:

Mechanism of gold activation gold catalyst catalytic active center

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