Effect of Lanthanum on Methanol Fuel Exhaust Deep Oxidation over Pall adium Catalyst
来源期刊：JOURNAL OF RARE EARTHS2003年第1期
论文作者：王幸宜 万颖 卢冠忠
Key words：supported palladium catalyst; methanol oxidation; lanthanum; rare earths;
Abstract: The performance of deep oxidation of methanol on supported Pd catalyst was examined by a chromatograph-micro-reactor. The results show that the addition of La into γ-Al2O3 support can affect greatly the performance of the Pd catalyst. In the absence of CO, La can decrease the content of oxygen-containing intermediate, although La can not lower the light-off temperature of methanol oxidation. In the presence of CO, La can lower the light-off temperature, decrease the amount of CO adsorption, and weaken evidently "CO inhibition" to the oxidation of methanol. By XPS technique, it is shown that La modifies the electronic structure of Pd, which attributes to the modifications of the catalytic performance.
王幸宜1，万颖1，卢冠忠1
(1.Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China)
Abstract:The performance of deep oxidation of methanol on supported Pd catalyst was examined by a chromatograph-micro-reactor. The results show that the addition of La into γ-Al2O3 support can affect greatly the performance of the Pd catalyst. In the absence of CO, La can decrease the content of oxygen-containing intermediate, although La can not lower the light-off temperature of methanol oxidation. In the presence of CO, La can lower the light-off temperature, decrease the amount of CO adsorption, and weaken evidently "CO inhibition" to the oxidation of methanol. By XPS technique, it is shown that La modifies the electronic structure of Pd, which attributes to the modifications of the catalytic performance.
Key words:supported palladium catalyst; methanol oxidation; lanthanum; rare earths;
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