Thermally stable Ir/Ce_0.9La_0.1O₂ catalyst for high temperature methane dry reforming reaction

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• 作者：Fagen Wang ; Leilei Xu ; Weidong Shi ; Jian Zhang ; Kai Wu ; Yu Zhao ; Hui Li…
• 关键词：thermally stable catalyst ; Ir/Ce0.9La0.1O2 ; metal–support interaction ; methane dry reforming
• 刊名：Nano Research
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：10
• 期：2
• 页码：364-380
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Nanotechnology; Materials Science, general; Atomic/Molecular Structure and Spectra; Condensed Matter Physics; Biotechnology; Biomedicine, general;
• 出版者：Tsinghua University Press
• ISSN：1998-0000
• 卷排序：10

文摘

In this study, the use of a thermally stable Ir/Ce_0.9La_0.1O₂ catalyst was investigated for the dry reforming of methane. The doping of La₂O₃ into the CeO₂ lattice enhanced the chemical and physical properties of the Ir/Ce_0.9La_0.1O₂ catalyst, such as redox properties, Ir dispersion, oxygen storage capacity, and thermal stability, with respect to the Ir/CeO₂ catalyst. Hence, the Ir/Ce_0.9La_0.1O₂ catalyst exhibits higher activity and stabler performance for the dry reforming of methane than the Ir/CeO₂ catalyst. This observation can be mainly attributed to the stronger interaction between the metal and support in the Ir/Ce_0.9La_0.1O₂ catalyst stabilizing the catalyst structure and improving the oxygen storage capacity, leading to negligible aggregation of Ir nanoparticles and the Ce_0.9La_0.1O₂ support at high temperatures, as well as the rapid removal of carbon deposits at the boundaries between the Ir metal and the Ce_0.9La_0.1O₂ support.