Complete Oxidation of Methane on NiO Nanoclusters Supported on CeO2 Nanorods through Synergistic Effect

doi:10.1021/acssuschemeng.8b00234

CIOMP OpenIR

	Complete Oxidation of Methane on NiO Nanoclusters Supported on CeO2 Nanorods through Synergistic Effect
	Zhang, X. Y.; House, S. D.; Tang, Y.; Nguyen, L.; Li, Y. T.; Opalade, A. A.; Yang, J. C.; Sun, Z. C.; Tao, F. F.
	2018
发表期刊	Acs Sustainable Chemistry & Engineering
ISSN	2168-0485
卷号	6 期号:5 页码:6467-6477
摘要	Catalytic complete oxidation of CH4 at relatively low temperatures is significant for removing unburned CH4 from the exhaust of combustion engines fueled with natural gas or liquefied petroleum gas. Here a nanocomposite catalyst (NiO/CeO2) consisting of CeO2 nanorods and supported NiO nanoclusters was prepared by a two-step wet-chemistry method. This nanocomposite catalyst exhibits high catalytic activity for the complete oxidation of CH4 in the temperature range of 350-600 degrees C A CH3-like intermediate bound to Ni cations was observed at a relatively low temperature by ambient pressure X-ray photoelectron spectroscopy under catalytic conditions. Parallel kinetic studies of NiO/SiO2, CeO2 and NiO/CeO2 catalysts show that the apparent barrier for complete oxidation of CH4 on NiO/CeO2 (69.4 +/- 4 kJ/mol) is much lower than the 95.1 +/- 5 kJ/mol of pure CeO2 and 98.4 +/- 5 kJ/mol of NiO/SiO2, supported by the turnover frequency of NiO/CeO2 being significantly higher than NiO/SiO2 and CeO2. These differences indicate a synergistic effect between the CeO2 nanorods and the supported NiO nanoclusters. This synergistic effect occurs at the interface of NiO and CeO2, observed in TEM. The lattice oxygen atoms at the interface exhibit high activity based on the lower reduction temperature uncovered in studies of the temperature-programmed reduction of H-2.
关键词	NiO CeO2 Methane Complete oxidation AP-XPS low-temperature oxidation ray photoelectron-spectroscopy pd-based catalysts in-situ cerium oxide 3d xps combustion surface metal nanoparticles Chemistry Science & Technology - Other Topics Engineering
DOI	10.1021/acssuschemeng.8b00234
收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/60933
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Zhang, X. Y.,House, S. D.,Tang, Y.,et al. Complete Oxidation of Methane on NiO Nanoclusters Supported on CeO2 Nanorods through Synergistic Effect[J]. Acs Sustainable Chemistry & Engineering,2018,6(5):6467-6477.
APA	Zhang, X. Y..,House, S. D..,Tang, Y..,Nguyen, L..,Li, Y. T..,...&Tao, F. F..(2018).Complete Oxidation of Methane on NiO Nanoclusters Supported on CeO2 Nanorods through Synergistic Effect.Acs Sustainable Chemistry & Engineering,6(5),6467-6477.
MLA	Zhang, X. Y.,et al."Complete Oxidation of Methane on NiO Nanoclusters Supported on CeO2 Nanorods through Synergistic Effect".Acs Sustainable Chemistry & Engineering 6.5(2018):6467-6477.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Complete Oxidation o（652KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览下载