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

被引：126

作者：

Croy, Jason R. ^{[1
]}

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

Hickman, L. ^{[1
]}

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

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

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

来源：

APPLIED CATALYSIS A-GENERAL | 2008年 / 350卷 / 02期

基金：

美国国家科学基金会;

关键词：

Pt nanoparticles; Micelles; Pt-oxides; XPS; AFM; TEM; Mass spectrometry; Packed-bed mass flow reactor; Methanol decomposition; Bimetallic nanoparticles; Segregation; Catalysis;

D O I：

10.1016/j.apcata.2008.08.013

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：

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 (similar to 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. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：207 / 216

页数：10

共 104 条

[21] A first principles analysis of CO oxidation over Pt and Pt66.7%Ru33.3% (111) surfaces [J].