Hydrogen spillover in the Fischer-Tropsch synthesis: An analysis of platinum as a promoter for cobalt-alumina catalysts
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- 作者：Doreen Nabaho<sup>asup> ; J.W. (Hans) Niemantsverdriet<sup>bsup> ; Michael Claeys<sup>asup> ; Eric van Steen<sup>asup><sup> ; sup><sup>eric.vansteen@uct.ac.za" class="auth_mail" title="E-mail the corresponding authorsup>
- 关键词：Hydrogen spillover ; Hybrid catalysts ; Noble metal promoter ; TPR ; TGA ; In situ XRD ; In situ XPS
- 刊名：Catalysis Today
- 出版年：2016
- 出版时间：1 March 2016
- 年：2016
- 卷：261
- 期：Complete
- 页码：17-27
- 全文大小：2400 K
文摘
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H-spillover in Pt promoted Co FT catalyst studied with mixture of Pt/Al<sub>2sub>O<sub>3sub> + Co/Al<sub>2sub>O<sub>3sub>.
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Pt improves Co reduction despite physical separation of Pt from Co via spillover.
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TPR, TGA, XRD and XPS show that Co<sub>3sub>O<sub>4sub> reduces via formation of a CoO intermediate.
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Pt has slight effect on Co<sub>3sub>O<sub>4sub> → CoO reduction but greatly improves CoO → Co<sup>0sup> reduction.
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During FT, spillover results in more CH<sub>4sub> and higher TOF due to cleansing effect of H.