Oxidation of methanol on Pt, Pt-Ru, and Pt-Ru-Mo electrocatalysts dispersed in polyaniline:: An in situ infrared reflectance spectroscopy study

被引：19

作者：

Lima, A ^{[1
]}

Hahn, F ^{[1
]}

Léger, JM ^{[1
]}

机构：

[1] Univ Poitiers, CNRS, UMR 6503, Equipe Electrocatalyse, F-86022 Poitiers, France

来源：

RUSSIAN JOURNAL OF ELECTROCHEMISTRY | 2004年 / 40卷 / 03期

关键词：

methanol; carbon monoxide; electrooxidation; conducting polymer; platinum-ruthenium-molybdenum anodes; infrared reflectance spectroscopy;

D O I：

10.1023/B:RUEL.0000019672.66289.56

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemical oxidation of methanol was investigated on a Pt-Ru-Mo catalyst with an in situ infrared reflectance spectroscopy. The electrocatalysts were prepared by an electrochemical deposition and dispersed in a conducting three-dimensional matrix of polyaniline (PAni). We observed that CO2 is produced from methanol oxidation at 350 mV vs. RHE on PAni/Pt-Ru-Mo, which is 100 mV less negative than on PAni/PtRu and 200 mV less than on PAni/Pt. The results suggest that Pt-Ru-Mo is less sensitive to CODS poisoning than Pt-Ru and much more sensitive than Pt. Large differences are observed concerning the average wavenumber of COADS between Pt-Ru-Mo, Pt-Ru, and Pt.

引用

页码：326 / 336

页数：11

共 31 条

[1] ELECTROSORPTION OF METHANOL ON A PLATINUM-ELECTRODE - IR SPECTROSCOPIC EVIDENCE FOR ADSORBED CO SPECIES [J].

BEDEN, B ;

LAMY, C ;

BEWICK, A ;

KUNIMATSU, K .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1981, 121 (APR) :343-347

[2]

BEDEN B, 1988, SPECTROELECTROCHEMIS

[3] Aspects of the anodic oxidation of methanol [J].

Burstein, GT ;

Barnett, CJ ;

Kucernak, AR ;

Williams, KR .

CATALYSIS TODAY, 1997, 38 (04) :425-437

[4] On some mechanistic aspects of the electrochemical oxidation of lactose at platinum and gold electrodes in alkaline medium [J].

Druliolle, H ;

Kokoh, KB ;

Hahn, F ;

Lamy, C ;

Beden, B .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1997, 426 (1-2) :103-115

[5] Binary and ternary anode catalyst formulations including the elements W, Sn and Mo for PEMFCs operated on methanol or reformate gas [J].

Gotz, M ;

Wendt, H .

ELECTROCHIMICA ACTA, 1998, 43 (24) :3637-3644

[6]

GOTZ M, 1998, 194 M EL SOC BOST

[7]

GRGUR BN, 1998, 194 M EL SOC BOST

[8] Mechanism and electrocatalysis in the direct methanol fuel cell [J].

Hamnett, A .

CATALYSIS TODAY, 1997, 38 (04) :445-457

[9]

Hamnett A, 1999, INTERFACIAL ELECTROCHEMISTRY, P843

[10] BASE-METAL OXIDES AS PROMOTORS FOR THE ELECTROCHEMICAL OXIDATION OF METHANOL [J].

HAMNETT, A ;

KENNEDY, BJ ;

WEEKS, SA .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1988, 240 (1-2) :349-353

← 1 2 3 4 →