The effect of CeO2 on Pt/CeO2/CNT catalyst for CO electrooxidation | |
Yuan, H. ; Guo, D. ; Li, X. ; Yuan, L. ; Zhu, W. ; Chen, L. ; Qiu, X. | |
2010-10-12 ; 2010-10-12 | |
关键词 | CO Oxidation Cyclic Voltammetry Electrocatalyst Fuel Cell Electrode Pt Based Electrocatalysts FUEL-CELLS ELECTROCHEMICAL CHARACTERIZATION ANODE ELECTROCATALYST MONOLAYER OXIDATION METHANOL OXIDATION NANOPARTICLES ETHANOL PLATINUM SIZE ELECTRODES Electrochemistry Energy & Fuels |
中文摘要 | Pt/CeO2/CNT catalysts were prepared by adsorbing Pt nanoparticles on the supports of CNTs coated with CeO2. The electrocatalytic performances in respect to the electrooxidation of chemisorbed CO were tested using potential step and stripping voltammetry methods under variable sweep rate and temperature conditions. At 10 mV s(-1) the CO stripping voltammogram exhibited the peak splitting phenomenon. The oxidation charge and the peak potential of the two voltammetric peaks changed regularly with the number of Pt and CeO2 neighbours, the sweep rate, and the temperature. We considered that the low potential peak originated from the reaction of COads with hydroxyl groups on CeO2 adjacent to Pt sites, while the high potential peak came from the reaction of COads with hydroxyl groups produced on pure Pt. Furthermore, the experimental results of the peak potential against the logarithm of the sweep rate and the logarithm of the current maximum time against the step potential were plotted and intersecting lines with different slopes in high and low potential regions in the plot were observed. The lines intersected at lower potentials on the Pt/CeO2/CNT electrode than on the Pt/CNT electrode, which was attributed to the contribution of hydroxyl groups on CeO2. |
语种 | 英语 ; 英语 |
出版者 | WILEY-V C H VERLAG GMBH ; WEINHEIM ; PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY |
内容类型 | 期刊论文 |
源URL | [http://hdl.handle.net/123456789/81139] ![]() |
专题 | 清华大学 |
推荐引用方式 GB/T 7714 | Yuan, H.,Guo, D.,Li, X.,et al. The effect of CeO2 on Pt/CeO2/CNT catalyst for CO electrooxidation[J],2010, 2010. |
APA | Yuan, H..,Guo, D..,Li, X..,Yuan, L..,Zhu, W..,...&Qiu, X..(2010).The effect of CeO2 on Pt/CeO2/CNT catalyst for CO electrooxidation.. |
MLA | Yuan, H.,et al."The effect of CeO2 on Pt/CeO2/CNT catalyst for CO electrooxidation".(2010). |
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