Size-selected Pt Nanoparticles Synthesized via Micelle Encapsulation: Effect of Pretreatment and Oxidation State on the Activity for Methanol Decomposition and Oxidation

    Authors

    J. R. Croy; S. Mostafa; H. Heinrich;B. R. Cuenya

    Comments

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    Abbreviated Journal Title

    Catal. Lett.

    Keywords

    Pt nanoparticles; Micelles; Methanol decomposition; Methanol oxidation; Pt oxide; PtO; PtO2; ZrO2; XPS; TEM; AFM; Mass spectrometry; Packed-bed; reactor; METAL-SUPPORT INTERACTION; DENSITY-FUNCTIONAL THEORY; IN-SITU RAMAN; GOLD NANOPARTICLES; CO OXIDATION; CATALYTIC-ACTIVITY; LOW-TEMPERATURE; MEOH DECOMPOSITION; THERMAL-STABILITY; PLATINUM; Chemistry, Physical

    Abstract

    The effect of pretreatment conditions on the oxidation state and activity of micelle-synthesized Pt nanoparticles supported on ZrO2 was studied for methanol decomposition and oxidation reactions. An O-2-pretreatment is observed to be effective for producing clean, stable, and active nanoparticles. Pt-oxide species formed during such pretreatments were found to have little influence in methanol decomposition reactions due to their tendency to reduce. However, these same species are stable during methanol oxidation and appear to take part in a Mars-van Krevelen-type of process, in which bound-oxygen (nanoparticle shell) may be replenished with oxygen from the gas phase.

    Journal Title

    Catalysis Letters

    Volume

    131

    Issue/Number

    1-2

    Publication Date

    1-1-2009

    Document Type

    Article

    Language

    English

    First Page

    21

    Last Page

    32

    WOS Identifier

    WOS:000268294700004

    ISSN

    1011-372X

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