Keyword Search:

Comparative study of Cu/ZnO catalysts derived from different precursors as a function of aging

Muhamad, Ernee Noryana and Ramli, Irmawati and Yap, Taufiq Yun Hin and Abdullah, Abdul Halim and Kniep, Benjamin Louis and Girgsdies, Frank and Ressler, Thorsten (2008) Comparative study of Cu/ZnO catalysts derived from different precursors as a function of aging. Catalysis Today, 131 (1-4). pp. 118-124. ISSN 0920-5861

Full text not available from this repository.

Official URL:


Structural modifications of Cu/ZnO catalysts for methanol steam reforming (MSR) as a function of precipitate aging in catalysts preparation process has been investigated comparatively. Freshly precipitated Cu,Zn-hydroxycarbonate (HC) and Cu,Zn-hydroxynitrate (HN) were aged in their mother liquor for a period of 120 min followed by washing, drying, calcination and reduction. Pronounced effect of aging was found for aged HC precipitates while no significant effect of aging was observed for aged HN solids. The bulk structure of the Cu/ZnO catalysts was investigated by means of TG/MS, in situ XRD and 63Cu NMR. The increase in the activity of the catalysts prepared by HC aging did not correlate linearly with the specific Cu surface area but coincides with an increase in the microstrain in the copper clusters presumably because of the improved interface between Cu and ZnO. Meanwhile, aging of HN precipitates results in large, separated and less strained Cu and ZnO particles with an inferior catalytic activity. Finally, both aged Cu/ZnO catalysts revealed smaller copper crystallite size compared to unaged samples.

Item Type:Article
Keyword:Precipitating agent, Aging, Copper, Zinc oxide, Microstrain
Faculty or Institute:Faculty of Science
DOI Number:10.1016/j.cattod.2007.10.010
ID Code:5824
Deposited By: Najwani Amir Sariffudin
Deposited On:04 May 2010 08:08
Last Modified:28 Jul 2010 07:40

Repository Staff Only: Edit item detail

Document Download Statistics

This item has been downloaded for since 04 May 2010 08:08.

View statistics for "Comparative study of Cu/ZnO catalysts derived from different precursors as a function of aging"


Universiti Putra Malaysia Institutional Repository is powered by EPrints 3 which is developed by the School of Electronics and Computer Science at the University of Southampton. More information and software credits.
Universiti Putra Malaysia Institutional Repository supports OAI 2.0 with a base URL of
Best viewed using IE version 7.0 (and above) Mozilla Firefox version 3 (and above) with the resolution of 1024 x 768.