Electrocatalytic Oxidation of CO at Pt Modified with Manganese Oxide Nanorods

被引：3
作者：
El-Deab, Mohamed Saada [1 ,2 ]
Kibler, Ludwig A. [2 ]
Kolb, Dieter M. [2 ]
机构：
[1] Cairo Univ, Fac Sci, Dept Chem, Cairo, Egypt
[2] Univ Ulm, Inst Electrochem, D-89069 Ulm, Germany
来源：
ELECTROCATALYSIS | 2011年 / 2卷 / 03期
关键词：
CO oxidation; Electrocatalysis; Manganese oxide; Metal oxides; Nanostructures; METHANOL OXIDATION; ELECTROCHEMICAL OXIDATION; MNOOH NANORODS; FORMIC-ACID; ELECTRODES; OXYGEN; ELECTROOXIDATION; CATALYSTS; PLATINUM; REDUCTION;
D O I：
10.1007/s12678-011-0056-z
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
CO oxidation at Pt anodes modified with manganese oxide nanorods (nano-MnOx/Pt) has been studied by cyclic and linear sweep voltammetry. Both CO adlayer stripping and oxidation of bulk CO are enhanced by nano-MnOx as compared to unmodified Pt electrodes. This is manifested by a negative shift of approximately 200 mV in the peak potential of CO adlayer stripping at the modified compared to the unmodified Pt surface. This enhancement is attributed to the catalytic mediation of manganese oxide nanorods (electrodeposited in a gamma-MnOOH single crystalline phase), which supplies oxygen species at relatively low anodic potentials and thus facilitates the oxidation of CO to CO2. This finding sheds new light on the formic acid oxidation in the presence of MnOx, as the latter can remove CO efficiently from the Pt surface, and hence, prevents its de-activation.
引用
收藏
页码：220 / 223
页数：4
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