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CeO2 supported low-loading Au as an enhanced catalyst for low temperature oxidation of carbon monoxide

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Abstract

A CeO2-supported Au nanohybrid is regarded as a promising catalytic system for CO oxidation, but its unsatisfactory catalytic activity and high cost are still challenges for sustainable application. In this work, we have synthesized a series of low loading and high activity Au/CeO2 supported catalysts using a coprecipitation method. Au/CeO2 catalysts with a low Au content (0.2 wt%) showed extremely high activity for CO oxidation with 100% conversion of CO around 60 °C. The key to the success is that the unique oxygen-deficient structure of cerium oxide can capture gold to provide a strong synergistic effect between the metal and the support. The content of gold in their oxidation states (Au+1, Au+3) present in the catalyst is one of the important factors affecting the catalytic activity. Furthermore, all of the prepared catalysts present a high BET surface area of roughly 140 m2 g−1. This high specific surface area provides adequate adsorption sites for CO. Moreover, the low loading of Au is critical to reducing the cost of noble metal-based catalysts and making them practical for industrial applications.

Graphical abstract: CeO2 supported low-loading Au as an enhanced catalyst for low temperature oxidation of carbon monoxide

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Publication details

The article was received on 17 Aug 2019, accepted on 24 Oct 2019 and first published on 24 Oct 2019


Article type: Paper
DOI: 10.1039/C9CE01301F
CrystEngComm, 2019, Advance Article

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    CeO2 supported low-loading Au as an enhanced catalyst for low temperature oxidation of carbon monoxide

    L. Li, Y. Liu, Q. Wang, X. Zhou, J. Li, S. Song and H. Zhang, CrystEngComm, 2019, Advance Article , DOI: 10.1039/C9CE01301F

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