The use of a metallic bilayer for the oxidation of small organic molecules

被引：36

作者：

Oliveira, RTS ^{[1
]}

Santos, MC ^{[1
]}

Marcussi, BG ^{[1
]}

Nascente, PAP ^{[1
]}

Bulhoes, LOS ^{[1
]}

Pereira, EC ^{[1
]}

机构：

[1] Univ Fed Sao Carlos, Dept Quim, Lab Interdisciplinar Electroquim & Ceram, Ctr Multidisciplinar Desenvolvimento Mat, BR-13565905 Sao Carlos, SP, Brazil

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2005年 / 575卷 / 02期

基金：

巴西圣保罗研究基金会;

关键词：

Pt/Rh/Pt multilayer; oxidation of small organic molecules; electrocatalysis;

D O I：

10.1016/j.jelechem.2004.09.009

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

This paper presents the preparation of a completely new Pt/Rh/Pt multilayer. This material was characterized by means of X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry (where the change in the electroactive area in the material during the deposition of the bilayer was discarded). The material was further tested for the oxidation of small organic molecules (methanol, ethanol, formaldehyde and formic acid) with the aid of cyclic voltammetry and chronoamperometry. In this study, increases of 295%, 266%, 140% and 380% in the voltammetric peak current density for methanol, ethanol, formaldehyde, and formic acid oxidation at the Pt/Rh/Pt bilayer, respectively, are presented. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：177 / 182

页数：6

共 35 条

[1] New insight into the pathways of methanol oxidation [J].

Batista, EA ;

Malpass, GRP ;

Motheo, AJ ;

Iwasita, T .

ELECTROCHEMISTRY COMMUNICATIONS, 2003, 5 (10) :843-846

[2] ELECTROCATALYTIC OXIDATION OF METHANOL ON PLATINUM-BASED BINARY ELECTRODES [J].

BEDEN, B ;

KADIRGAN, F ;

LAMY, C ;

LEGER, JM .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1981, 127 (1-3) :75-85

[3]

Beden B., 1992, MODERN ASPECTS ELECT, P97, DOI DOI 10.1007/978-1-4615-3376-4_2

[4] A comparison of multistability in the electrocatalyzed oxidations of methanol and ethanol in acid and alkaline solutions [J].

Chen, SL ;

Schell, M .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1999, 478 (1-2) :108-117

[5] Anode materials for low-temperature fuel cells: A density functional theory study [J].

Christoffersen, E ;

Liu, P ;

Ruban, A ;

Skriver, HL ;

Norskov, JK .

JOURNAL OF CATALYSIS, 2001, 199 (01) :123-131

[6] ELECTROCHEMICAL OXIDE FILM FORMATION AT NOBLE-METALS AS A SURFACE-CHEMICAL PROCESS [J].

CONWAY, BE .

PROGRESS IN SURFACE SCIENCE, 1995, 49 (04) :331-452

[7] Electro-oxidation of ethanol on Pt, Rh, and PtRh electrodes. A study using DEMS and in-situ FTIR techniques [J].

de Souza, JPI ;

Queiroz, SL ;

Bergamaski, K ;

Gonzalez, ER ;

Nart, FC .

JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (38) :9825-9830

[8] On the structure effects of bimetallic PtRu electrocatalysts towards methanol oxidation [J].

Dubau, L ;

Hahn, F ;

Coutanceau, C ;

Léger, JM ;

Lamy, C .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2003, 554 :407-415

[9]

EDERSEN PMO, 1999, SURF SCI, V426, P395

[10] TEMPERATURE-DEPENDENT METHANOL ELECTROOXIDATION ON WELL-CHARACTERIZED PT-RU ALLOYS [J].

GASTEIGER, HA ;

MARKOVIC, N ;

ROSS, PN ;

CAIRNS, EJ .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1994, 141 (07) :1795-1803

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