4.7 Article

Dry Reforming of Methane over 5%Ni/Ce1-xTixO2 Catalysts Obtained via Synthesis in Supercritical Isopropanol

期刊

出版社

MDPI
DOI: 10.3390/ijms24119680

关键词

methane dry reforming; supercritical synthesis; fluorite; ceria-titania; heterogeneous catalysis

向作者/读者索取更多资源

A series of 5%Ni/Ce1-xTixO2 catalysts were prepared using nickel impregnation of mixed Ce-Ti oxides obtained via synthesis in supercritical isopropanol. The addition of Ti into the cubic fluorite phase structure increased the total reducibility of the catalysts and improved the interaction of supported Ni with the oxide support. The incorporation of Ti also prevented the detachment and sintering of Ni particles during dry reforming of methane.
A series of 5%Ni/Ce1-xTixO2 catalysts was prepared with nickel impregnation of mixed Ce-Ti oxides obtained via synthesis in supercritical isopropanol. All oxides have a cubic fluorite phase structure. Ti is incorporated into the fluorite structure. Small amounts of impurities of TiO2 or mixed Ce-Ti oxides appear with Ti introduction. Supported Ni is presented as the NiO or NiTiO3 perovskite phase. Ti introduction increases total samples reducibility and results in stronger interaction of supported Ni with the oxide support. The fraction of rapidly replaced oxygen and the average tracer diffusion coefficient also increase. The number of metallic nickel sites decreased with increasing Ti content. All catalysts except Ni-CeTi0.45 demonstrate close activity in tests of dry reforming of methane. The lower activity of Ni-CeTi0.45 can be connected to Ni decoration with species of the oxide support. The incorporation of Ti prevents detachment of Ni particles from the surface and their sintering during dry reforming of methane.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据