Synthesis and characterization of Ni-doped vanadium phosphorus oxide catalysts
The effect of Ni doping (1%, 2%, and 5%) on vanadium phosphate catalysts prepared via VOPO4·2H2O was described and discussed. At low levels, the Ni dopant significantly enhanced the amount of the active lattice oxygen species O− and lowered the reduction peak temperature corresponding to the reducti...
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| Format: | Article |
| Language: | English |
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Elsevier
2007
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| Online Access: | http://psasir.upm.edu.my/id/eprint/7855/ http://psasir.upm.edu.my/id/eprint/7855/1/Synthesis%20and%20Characterization%20of%20Ni.pdf |
| _version_ | 1848840711073431552 |
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| author | Yap, Taufiq Yun Hin Abdul Aziz, Abdul Ghani |
| author_facet | Yap, Taufiq Yun Hin Abdul Aziz, Abdul Ghani |
| author_sort | Yap, Taufiq Yun Hin |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | The effect of Ni doping (1%, 2%, and 5%) on vanadium phosphate catalysts prepared via VOPO4·2H2O was described and discussed. At low levels, the Ni dopant significantly enhanced the amount of the active lattice oxygen species O− and lowered the reduction peak temperature corresponding to the reduction of V5+ and V4+ phases. A combination of powder X-ray diffraction, temperature-programmed reduction, and chemical analysis data shows that at higher levels, Ni doping induced the formation of the V5+ phase and suppressed the presence of the V4+ phase. Previous studies have indicated that a large amount of oxygen species associated with V5+ inhibit the n-butane conversion but promote the selectivity for maleic anhydride. |
| first_indexed | 2025-11-15T07:31:41Z |
| format | Article |
| id | upm-7855 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T07:31:41Z |
| publishDate | 2007 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-78552016-11-25T01:19:30Z http://psasir.upm.edu.my/id/eprint/7855/ Synthesis and characterization of Ni-doped vanadium phosphorus oxide catalysts Yap, Taufiq Yun Hin Abdul Aziz, Abdul Ghani The effect of Ni doping (1%, 2%, and 5%) on vanadium phosphate catalysts prepared via VOPO4·2H2O was described and discussed. At low levels, the Ni dopant significantly enhanced the amount of the active lattice oxygen species O− and lowered the reduction peak temperature corresponding to the reduction of V5+ and V4+ phases. A combination of powder X-ray diffraction, temperature-programmed reduction, and chemical analysis data shows that at higher levels, Ni doping induced the formation of the V5+ phase and suppressed the presence of the V4+ phase. Previous studies have indicated that a large amount of oxygen species associated with V5+ inhibit the n-butane conversion but promote the selectivity for maleic anhydride. Elsevier 2007-12 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/7855/1/Synthesis%20and%20Characterization%20of%20Ni.pdf Yap, Taufiq Yun Hin and Abdul Aziz, Abdul Ghani (2007) Synthesis and characterization of Ni-doped vanadium phosphorus oxide catalysts. Chinese Journal of Catalysis, 28 (12). pp. 1037-1040. ISSN 1872-2067 http://dx.doi.org/10.1016/S1872-2067(08)60005-4 10.1016/S1872-2067(08)60005-4 |
| spellingShingle | Yap, Taufiq Yun Hin Abdul Aziz, Abdul Ghani Synthesis and characterization of Ni-doped vanadium phosphorus oxide catalysts |
| title | Synthesis and characterization of Ni-doped vanadium phosphorus oxide catalysts |
| title_full | Synthesis and characterization of Ni-doped vanadium phosphorus oxide catalysts |
| title_fullStr | Synthesis and characterization of Ni-doped vanadium phosphorus oxide catalysts |
| title_full_unstemmed | Synthesis and characterization of Ni-doped vanadium phosphorus oxide catalysts |
| title_short | Synthesis and characterization of Ni-doped vanadium phosphorus oxide catalysts |
| title_sort | synthesis and characterization of ni-doped vanadium phosphorus oxide catalysts |
| url | http://psasir.upm.edu.my/id/eprint/7855/ http://psasir.upm.edu.my/id/eprint/7855/ http://psasir.upm.edu.my/id/eprint/7855/ http://psasir.upm.edu.my/id/eprint/7855/1/Synthesis%20and%20Characterization%20of%20Ni.pdf |