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
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
收藏
页码:1439 / 1444
页数:6
相关论文
共 45 条
[21]   Electrocatalysis of methanol oxidation [J].
Iwasita, T .
ELECTROCHIMICA ACTA, 2002, 47 (22-23) :3663-3674
[22]   AN FTIR STUDY OF THE CATALYTIC ACTIVITY OF A 85-15 PT-RU ALLOY FOR METHANOL OXIDATION [J].
IWASITA, T ;
NART, FC ;
VIELSTICH, W .
BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1990, 94 (09) :1030-1034
[23]   Potential dependence of the yield of carbon dioxide from electrocatalytic oxidation of methanol on platinum(100) [J].
Jarvi, TD ;
Sriramulu, S ;
Stuve, EM .
JOURNAL OF PHYSICAL CHEMISTRY B, 1997, 101 (19) :3649-3652
[24]   Impedance of porous gold electrodes in the presence of electroactive species [J].
Jurczakowski, R ;
Hitz, C ;
Lasia, A .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2005, 582 (1-2) :85-96
[25]   Composition and activity of high surface area PtRu catalysts towards adsorbed CO and methanol electrooxidation - A DEMS study [J].
Jusys, Z ;
Kaiser, J ;
Behm, RJ .
ELECTROCHIMICA ACTA, 2002, 47 (22-23) :3693-3706
[26]   A new approach for simultaneous DEMS and EQCM: Electro-oxidation of adsorbed CO on Pt and Pt-Ru [J].
Jusys, Z ;
Massong, H ;
Baltruschat, H .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1999, 146 (03) :1093-1098
[27]   In situ FTIRS study of the electrocatalytic oxidation of carbon monoxide and methanol at platinum-ruthenium bulk alloy electrodes [J].
Kabbabi, A ;
Faure, R ;
Durand, R ;
Beden, B ;
Hahn, F ;
Leger, JM ;
Lamy, C .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1998, 444 (01) :41-53
[28]   Kinetics of methanol oxidation on carbon-supported Pt and Pt+Ru catalysts [J].
Kauranen, PS ;
Skou, E ;
Munk, J .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1996, 404 (01) :1-13
[29]   Impedance spectroscopic analysis of the electrochemical methanol oxidation kinetics [J].
Krewer, U ;
Christov, M ;
Vidakovic', T ;
Sundmacher, K .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2006, 589 (01) :148-159
[30]   INFRARED SPECTROSCOPIC STUDY OF METHANOL AND FORMIC-ACID ADSORBATES ON A PLATINUM-ELECTRODE .1. COMPARISON OF THE INFRARED-ABSORPTION INTENSITIES OF LINEAR CO(A) DERIVED FROM CO, CH3OH AND HCOOH [J].
KUNIMATSU, K .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1986, 213 (01) :149-157