Influence of Cu on NOx storage performance of Pt/Cu-Mg-Al-O catalysts derived from hydrotalcites
Influence of Cu on NOx storage performance of Pt/Cu-Mg-Al-O catalysts derived from hydrotalcites
A series of Cu-Mg-Al hydrotalcite compounds with M (II) :Al (III) molar ratio of 3 : 1 were prepared by co-precipitation method. Corresponding mixed oxides were obtained after calcination 500 ??wCuO(?)= 0, 5, 10, 20, denoted as w-CMAO, w=0, 5, 10, 20. Pt/Cu-Mg-Al-O catalysts were prepared by impregnation with H2PtCl6 solution. XRD results showed that Cu was well dispersed in the catalysts and their precursors. NOx storage performance was investigated using NOx adsorption experiment at constant temperature, and decomposition of stored NOx was also studied by TPD method. It was shown that although MgO content was decreased due to Cu addition, the activity of NO oxidation was improved, and NOx storage performance was increased effectively. TPD results further showed that the decomposition temperature of nitrate formed on the catalysts can be reduced sharply when w=10??20? of CuO was added.
nitrogen oxide, hydrotalcite, NOx storage, lean burn, Pt/Cu-Mg-Al-O
278-282
Kang, Shou-Fang
3aa30e0c-91c8-424b-9a0c-de6e75a4b95b
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Hao, Zheng-Ping
798a7bc7-8fd8-4ca0-af85-aaa904020dcd
15 March 2005
Kang, Shou-Fang
3aa30e0c-91c8-424b-9a0c-de6e75a4b95b
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Hao, Zheng-Ping
798a7bc7-8fd8-4ca0-af85-aaa904020dcd
Kang, Shou-Fang, Jiang, Zheng and Hao, Zheng-Ping
(2005)
Influence of Cu on NOx storage performance of Pt/Cu-Mg-Al-O catalysts derived from hydrotalcites.
Acta Physico-Chimica Sinica, 21 (3), .
(doi:10.3866/PKU.WHXB20050310).
Abstract
A series of Cu-Mg-Al hydrotalcite compounds with M (II) :Al (III) molar ratio of 3 : 1 were prepared by co-precipitation method. Corresponding mixed oxides were obtained after calcination 500 ??wCuO(?)= 0, 5, 10, 20, denoted as w-CMAO, w=0, 5, 10, 20. Pt/Cu-Mg-Al-O catalysts were prepared by impregnation with H2PtCl6 solution. XRD results showed that Cu was well dispersed in the catalysts and their precursors. NOx storage performance was investigated using NOx adsorption experiment at constant temperature, and decomposition of stored NOx was also studied by TPD method. It was shown that although MgO content was decreased due to Cu addition, the activity of NO oxidation was improved, and NOx storage performance was increased effectively. TPD results further showed that the decomposition temperature of nitrate formed on the catalysts can be reduced sharply when w=10??20? of CuO was added.
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Published date: 15 March 2005
Keywords:
nitrogen oxide, hydrotalcite, NOx storage, lean burn, Pt/Cu-Mg-Al-O
Organisations:
Faculty of Engineering and the Environment
Identifiers
Local EPrints ID: 352790
URI: http://eprints.soton.ac.uk/id/eprint/352790
ISSN: 1872-1508
PURE UUID: 950bd5f6-5927-4bf8-835c-ba2dced93d0c
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Date deposited: 17 Jun 2013 13:23
Last modified: 15 Mar 2024 03:47
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Author:
Shou-Fang Kang
Author:
Zheng-Ping Hao
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