Comparative study of Cu/ZnO catalysts derived from different precursors as a function of aging
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 fo...
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| Format: | Article |
| Language: | English |
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Elsevier
2008
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| Online Access: | http://psasir.upm.edu.my/id/eprint/5824/ http://psasir.upm.edu.my/id/eprint/5824/2/Comparative%20study%20of%20Cu.pdf |
| _version_ | 1848840206801698816 |
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| author | Muhamad, Ernee Noryana Ramli, Irmawati Yap, Taufiq Yun Hin Abdullah, Abdul Halim Kniep, Benjamin Louis Girgsdies, Frank Ressler, Thorsten |
| author_facet | Muhamad, Ernee Noryana Ramli, Irmawati Yap, Taufiq Yun Hin Abdullah, Abdul Halim Kniep, Benjamin Louis Girgsdies, Frank Ressler, Thorsten |
| author_sort | Muhamad, Ernee Noryana |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-15T07:23:40Z |
| format | Article |
| id | upm-5824 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T07:23:40Z |
| publishDate | 2008 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-58242016-11-29T02:00:33Z http://psasir.upm.edu.my/id/eprint/5824/ Comparative study of Cu/ZnO catalysts derived from different precursors as a function of aging Muhamad, Ernee Noryana Ramli, Irmawati Yap, Taufiq Yun Hin Abdullah, Abdul Halim Kniep, Benjamin Louis Girgsdies, Frank Ressler, Thorsten 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. Elsevier 2008 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/5824/2/Comparative%20study%20of%20Cu.pdf 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 http://dx.doi.org/10.1016/j.cattod.2007.10.010 10.1016/j.cattod.2007.10.010 |
| spellingShingle | Muhamad, Ernee Noryana Ramli, Irmawati Yap, Taufiq Yun Hin Abdullah, Abdul Halim Kniep, Benjamin Louis Girgsdies, Frank Ressler, Thorsten Comparative study of Cu/ZnO catalysts derived from different precursors as a function of aging |
| title | Comparative study of Cu/ZnO catalysts derived from different
precursors as a function of aging |
| title_full | Comparative study of Cu/ZnO catalysts derived from different
precursors as a function of aging |
| title_fullStr | Comparative study of Cu/ZnO catalysts derived from different
precursors as a function of aging |
| title_full_unstemmed | Comparative study of Cu/ZnO catalysts derived from different
precursors as a function of aging |
| title_short | Comparative study of Cu/ZnO catalysts derived from different
precursors as a function of aging |
| title_sort | comparative study of cu/zno catalysts derived from different
precursors as a function of aging |
| url | http://psasir.upm.edu.my/id/eprint/5824/ http://psasir.upm.edu.my/id/eprint/5824/ http://psasir.upm.edu.my/id/eprint/5824/ http://psasir.upm.edu.my/id/eprint/5824/2/Comparative%20study%20of%20Cu.pdf |