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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| Authors: | Jason R Croy S Mostafa L Hickman H Heinrich B Roldan Cuenya |
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| Affiliation: | aDepartment of Physics, University of Central Florida, Orlando, FL 32816, United States;bDepartment of Civil and Environmental Engineering, University of Central Florida, Orlando, FL 32816, United States;cCenter of Advanced Materials Processing and Characterization, University of Central Florida, Orlando, FL 32816, United States |
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| 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. |
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| 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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