A study of "superacidic" MoO3/ZrO2 catalysts for methane oxidation

Brown, A. S. C., Hargreaves, Justin S. J. and Taylor, Stuart H. ORCID: https://orcid.org/0000-0002-1933-4874 1999. A study of "superacidic" MoO3/ZrO2 catalysts for methane oxidation. Catalysis Letters 57 (3) , pp. 109-113. 10.1023/A:1019047632335

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Abstract

A series of zirconia-supported molybdenum oxide catalysts with different molybdenum loadings prepared using conditions reported to generate "superacidity" have been evaluated for their performance as catalysts for methane oxidation. A marked dependence of Mo content on activity has been observed, with the most active material being that with intermediate molybdenum content. 5 wt MoO3/ ZrO2 compares favourably with Zrcursive Greek chiCe1-cursive Greek chiO2 for methane combustion. The presence of MoO3 is observed to stabilise the tetragonal polymorph of ZrO2 and, as Mo content is increased, dispersed MoO3 crystallites are formed as evidenced by Raman spectroscopy. Temperature-programmed reduction studies evidence differences in the reduction behaviour of the materials as a function of loading. The results indicate that molybdenum oxide supported on monoclinic zirconia gives rise to the most active catalyst. It is tentatively suggested that the formation of a MoO3 monolayer during reaction may be of importance.

Item Type:	Article
Status:	Published
Schools:	Chemistry Cardiff Catalysis Institute (CCI)
Subjects:	Q Science > QD Chemistry
Uncontrolled Keywords:	Methane; Molybdenum oxide; Oxidation; Superacid; Zirconia
Additional Information:	cited By (since 1996) 17
Publisher:	Springer
ISSN:	1011-372X
Last Modified:	05 Jan 2023 14:27
URI:	https://orca.cardiff.ac.uk/id/eprint/10311

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