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

被引：48

作者：

Croy, Jason R. ^{[1
]}

Mostafa, S. ^{[1
,2
]}

Heinrich, H. ^{[1
,3
]}

Roldan Cuenya, B. ^{[1
,2
,4
]}

机构：

[1] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA

[2] Univ Cent Florida, Dept Civil & Environm Engn, Orlando, FL 32816 USA

[3] Univ Cent Florida, Ctr Adv Mat Proc & Characterizat, Orlando, FL 32816 USA

[4] Univ Cent Florida, Nanosci & Technol Ctr, Orlando, FL 32816 USA

来源：

CATALYSIS LETTERS | 2009年 / 131卷 / 1-2期

关键词：

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;

D O I：

10.1007/s10562-009-0042-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：21 / 32

页数：12

共 80 条

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