Nanoporous TiO2-supported bimetallic catalysts for methanol oxidation in acidic media

被引：102

作者：

Hepel, Maria ^{[1
]}

Kumarihamy, Indee

Zhong, C. J.

机构：

[1] SUNY Coll Potsdam, Dept Chem, Potsdam, NY 13676 USA

[2] SUNY Binghamton, Dept Chem, Binghamton, NY 13902 USA

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2006年 / 8卷 / 09期

基金：

美国国家科学基金会;

关键词：

catalysis; methanol oxidation; nanoporous TiO2; EQCN; PtRu catalyst; mesoporous catalyst;

D O I：

10.1016/j.elecom.2006.05.033

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

New dynamic aspects of the catalysis of methanol oxidation reaction have been studied. The submonolayer films of bi-functional catalysts (PtRu) were deposited on novel nanostructured supporting materials, designed with the goal of achieving high variability of their electronic and chemical properties to influence the catalytic activity of sub-monolayer catalyst. The mesoscopic TiO2 supporting film formation was investigated using EQCN, voltammetric, and AFM techniques. The conditions for the formation of monodispersed TiO2 nanoparticles with regular nanopores, 20-80 nm in diameter, were described. It follows from EQCN and voltammetric measurements and AFM image analysis that the nanopores are formed by a dissolution-precipitation mechanism. The activity of submonolayer catalysts PtRu deposited on nanoporous TiO2-n films was investigated using the point defect formation voltammetry. A lower poisoning effect for cluster PtRu on a TiO2 support film than that for unsupported PtRu and bare Pt catalysts has been observed. The implications of the support-catalyst interactions are discussed in details. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1439 / 1444

页数：6

共 45 条

[1] STRUCTURAL EFFECTS IN ELECTROCATALYSIS - OXIDATION OF FORMIC-ACID AND OXYGEN REDUCTION ON SINGLE-CRYSTAL ELECTRODES AND THE EFFECTS OF FOREIGN METAL ADATOMS [J].