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Bimetallic Pt-Metal catalysts for the decomposition of methanol: Effect of secondary metal on the oxidation state, activity, and selectivity of Pt

Paper ID Volume ID Publish Year Pages File Format Full-Text
43296 45962 2008 10 PDF Available
Title
Bimetallic Pt-Metal catalysts for the decomposition of methanol: Effect of secondary metal on the oxidation state, activity, and selectivity of Pt
Abstract

We present here a study of methanol (MeOH) decomposition over a series of bimetallic Pt-M catalysts, with M = Au, Pd, Ru, Fe. All samples have the same initial size distribution (∼3 nm nanoparticle height), support (ZrO2), and preparation conditions. Therefore, differences in the electronic and catalytic properties of the samples tested are related directly to the addition of the secondary metals (M). We find that the oxidation state as well as the activity of Pt is heavily influenced by the addition of the secondary metal. PtO is found to be highly stable in these systems and increasing concentrations of metallic Pt are associated with the surface segregation of metal M due to its affinity for the oxygen present during air annealing.

Graphical abstractWe present a study of methanol decomposition over ZrO2-supported bimetallic Pt0.8M0.2 nanocatalysts (∼3 nm), with M = Au, Pd, Ru, Fe. The oxidation state and the activity of Pt was found to be heavily influenced by the addition of the secondary metal. Segregation trends upon annealing in air are discussed.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Pt nanoparticles; Micelles; Pt-oxides; XPS; AFM; TEM; Mass spectrometry; Packed-bed mass flow reactor; Methanol decomposition; Bimetallic nanoparticles; Segregation; Catalysis
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Bimetallic Pt-Metal catalysts for the decomposition of methanol: Effect of secondary metal on the oxidation state, activity, and selectivity of Pt
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 350, Issue 2, 30 November 2008, Pages 207–216
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
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