Methanol oxidation at Pt/MoOx/MoSe2 thin film electrodes prepared with exfoliated MoSe2

被引：20

作者：

Bolivar, H ^{[1
]}

Izquierdo, S ^{[1
]}

Tremont, R ^{[1
]}

Cabrera, CR ^{[1
]}

机构：

[1] Univ Puerto Rico, Dept Chem, San Juan, PR 00931 USA

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2003年 / 33卷 / 12期

关键词：

exfoliation; methanol oxidation; Mo; MoSe2; Pt;

D O I：

10.1023/B:JACH.0000003868.71691.92

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 [应用化学];

摘要：

This paper presents results on the dispersion of Pt on MoOx/MoSe2 electrodes, which were prepared by an intercalation-exfoliation technique. The Pt/MoOx/MoSe2 electrodes were tested for methanol oxidation by cyclic voltammetry. Thin films of MoSe2 can be oxidized electrochemically to form a MOO, layer. Compared with pure platinum, Pt/MoOx/MoSe2 electrodes gave lower oxidation potentials and higher current densities. We believe that methanol adsorption and subsequent dehydrogenation occur at the Pt atoms, while the OHads nucleation occurs at Mo sites. The presence of the adsorbed -OH groups on Mo sites may catalyze CO oxidation to CO2. This surface reaction is necessary for the improved electrocatalytic behavior of Pt/MoOx/MoSe2 electrodes.

引用

页码：1191 / 1198

页数：8

共 30 条

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