Au/CuO-CeO2 catalyst for preferential oxidation of CO in hydrogen-rich stream: Effect of CuO content

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题名:	Au/CuO-CeO2 catalyst for preferential oxidation of CO in hydrogen-rich stream: Effect of CuO content
作者:	陳郁文;Lee, Der-Shing;Chen, Yu-Wen
贡献者:	工學院化學工程與材料工程學系
关键词:	CeO2;CO oxidation;CuO;Fuel cell;Gold;PROX
日期:	2016-02-09
上传时间:	2026-04-21 14:48:43 (UTC+8)
出版者:	Elsevier Ltd.;Elsevier Ltd
摘要:	摘要： A series of Au/CuO–CeO2 with various amounts of CuO was prepared. CuO–CeO2 was prepared by co-precipitation and Au was loaded by deposition–precipitation. The aim of this study was to develop a catalyst which is highly active and selective in preferential oxidation of CO in hydrogen stream (PROX). These catalysts were characterized by N2-sorption, XRD, TEM, HR-TEM, and XPS. The PROX reaction was carried out in a fixed bed continuous flow reactor with a feed of CO: O2: H2: He = 1.33: 1.33: 65.33: 32.01 in volume ratios. The incorporation of copper ion into ceria lattice increased the oxygen storage capacity of ceria and enhanced the activity of the catalyst. The excess CuO would present on the surface of CeO2. Au particles were well dispersed well on the support and the particle size of gold was in the range of 2 and 4 nm. Au was the active species and CuO played the promoter role. Those CuO presented on the surface of CeO had negative effect for CO oxidation. The selectivity of oxygen reacting with CO increased with increasing CuO content. Adding suitable amount of CuO in Au/CeO2 is beneficial for CO conversion and suppressing hydrogen oxidation in fuel cell operation condition. •Au/CuO–CeO2 is a good catalyst for CO removal in H2 stream.•Incorporation of Cu ions into CeO2 lattice increases the oxygen storage capacity. 出版者： Elsevier Ltd 出版日期： 2016-02-09 出處： International journal of hydrogen energy, 2016-02, Vol.41 (5), p.3605-3612 資源來源： Elsevier ScienceDirect Journals Complete 版權： 2015 Hydrogen Energy Publications, LLC. 識別號： ISSN: 0360-3199 識別號： EISSN: 1879-3487 識別號： DOI: 10.1016/j.ijhydene.2015.12.137
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