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Novel mesoporous zirconia-based catalysts for WGS reaction

Paper ID Volume ID Publish Year Pages File Format Full-Text
47278 46466 2010 8 PDF Available
Title
Novel mesoporous zirconia-based catalysts for WGS reaction
Abstract

Newly synthesized mesoporous zirconia-based catalysts were investigated for the WGS reaction, using niobium oxide as a promoter and platinum as the active metal. Their performances for hydrogen production were correlated to the surface properties. Niobium addition gives rise to different effects: the 0.3 loading considerably enhances the catalytic performances of the catalyst for all temperatures, for both hydrogen production and selectivity (with respect to the CO to CO2 oxidation). On the contrary, when a Nb monolayer is produced on the zirconia surface, the activity is highly reduced with respect to the Pt/ZrO2 sample. In particular, the acid–base behaviour of the surface was linked to the zirconia–niobia interaction and its consequence on the metal–support interaction. A description of the surface was attempted and a reaction pathway through formate species formation and decomposition proposed.

Keywords
Pt/niobia–zirconia; Acidity; WGS; Formate intermediate; Operando–FT-IR/MS
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 97, Issues 1–2, 9 June 2010, Pages 49–56
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
You save - $31
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