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首页> 外文期刊>Catalysis science & technology >Crystal-plane effect of nanoscale CeO2 on the catalytic performance of Ni/CeO2 catalysts for methane dry reforming
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Crystal-plane effect of nanoscale CeO2 on the catalytic performance of Ni/CeO2 catalysts for methane dry reforming

机译：纳米级CeO2的晶面效应Ni / CeO2催化剂的催化性能甲烷干重整

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摘要

The morphology and crystal-plane effects of CeO2 materials (nanorods, nanocubes, nanooctas and nanoparticles) on the catalytic performance of Ni/CeO2 in methane dry reforming were investigated. The XRD and Raman results showed that Ni species can be incorporated into the lattices and induce the increase of oxygen vacancies by occupying the vacant sites in the CeO2 nanomaterials. The reaction experiments showed that the catalysts supported over CeO2 nanorods achieved significantly higher catalytic activity and better stability than the other three catalysts. This improved activity was closely related to the strong metal-support interaction between Ni and CeO2 nanorods, which showed great superiority in anchoring Ni nanoparticles. The oxygen vacancies and the mobility of lattice oxygen also showed morphology dependence. They can participate in the catalytic reaction and be favorable for the elimination of carbon deposition. Resistance to carbon deposition was found over the Ni/CeO2-nanorod catalyst, whereas large quantities of graphitic carbon species were formed over the Ni/CeO2-nanocube catalysts, which was responsible for deactivation.
机译：CeO2的形态学和晶面效应材料(纳米、nanocubes nanooctas和纳米颗粒的催化性能Ni / CeO2甲烷干重整调查。镍物种可以被纳入格和诱导的增加氧气占据空网站的职位空缺CeO2纳米材料。表明,该催化剂在CeO2支持纳米棒达到更高的催化活动和更好的稳定性三种催化剂。强烈的金属支撑密切相关倪之间的交互和CeO2纳米在锚定倪表现出极大的优越性纳米粒子。流动的晶格氧还显示形态依赖。反应,有利于消除碳沉积。沉积镍/ CeO2-nanorod被发现催化剂,而大量的石墨碳物种形成的Ni / CeO2-nanocube催化剂,这是负责任的失活。

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