Structural Determination of Catalytically Active Subnanometer Iron Oxide Clusters

doi:10.1021/acscatal.6b00328

CAS OpenIR > 中科院上海应用物理研究所2011-2018年

	Structural Determination of Catalytically Active Subnanometer Iron Oxide Clusters
	Yang, Q; Fu, XP; Jia, CJ; Ma, C; Wang, X; Zeng, J; Si, R; Zhang, YW; Yan, CH; Si, R (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China.; Jia, CJ (reprint author), Shandong Univ, Sch Chem & Chem Engn, Key Lab Special Aggregated Mat, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China.; Ma, C (reprint author), Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China.
	2016
发表期刊	ACS CATALYSIS
ISSN	2155-5435
卷号	6 期号:5 页码:3072—3082
文章类型	期刊文献
摘要	Supported subnanometer clusters exhibit superiority in catalytic performance compared to common nanoparticles, due to their higher fraction of exposed surfaces and larger number of active species at the metal support interface, responding to the size effect and the support effect in heterogeneous catalysis. Here, we report the synthesis of subnanometer iron oxide clusters anchored to the surfaces of two types of ceria nanoshapes (nanorods and nanopolyhedra), as well as the structure activity relation investigation for Fischer-Tropsch synthesis. On the basis of the comprehensive structural characterizations including aberration-corrected scanning transmission electron microscopy (STEM) and X-ray absorption fine structure (XAFS), we demonstrated that the subnanometer clusters of iron oxide are stable and catalytically active for the Fischer-Tropsch synthesis reaction. Furthermore, it is identified that finely dispersed iron oxide clusters (Fe-O-x-Fe-y) consisted of partially reduced Fe delta+ (delta = 2.6-2.9) species in ceria nanorods are active for Fischer Tropsch synthesis; however, another type of iron oxide cluster (Fe-O-x-Ce-y) composed of fully oxidized Fe3+ ions strongly interacted with the ceria nanopolyhedra support but exhibits relatively poorer activity for the reaction. These results have broad implications on the fundamental understanding of active site of supported metal catalysts at the atomic level.
关键词	Fischer-tropsch Synthesis Gas Shift Reaction Co Oxidation Mixed Oxides In-situ Catalysts Gold Size Nanoparticles Carbide
DOI	10.1021/acscatal.6b00328
收录类别	SCI
语种	英语
WOS记录号	WOS:000375894500039
引用统计
文献类型	期刊论文
条目标识符	http://ir.sinap.ac.cn/handle/331007/25841
专题	中科院上海应用物理研究所2011-2018年
通讯作者	Si, R (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China.; Jia, CJ (reprint author), Shandong Univ, Sch Chem & Chem Engn, Key Lab Special Aggregated Mat, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China.; Ma, C (reprint author), Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China.
推荐引用方式 GB/T 7714	Yang, Q,Fu, XP,Jia, CJ,et al. Structural Determination of Catalytically Active Subnanometer Iron Oxide Clusters[J]. ACS CATALYSIS,2016,6(5):3072—3082.
APA	Yang, Q.,Fu, XP.,Jia, CJ.,Ma, C.,Wang, X.,...&Ma, C .(2016).Structural Determination of Catalytically Active Subnanometer Iron Oxide Clusters.ACS CATALYSIS,6(5),3072—3082.
MLA	Yang, Q,et al."Structural Determination of Catalytically Active Subnanometer Iron Oxide Clusters".ACS CATALYSIS 6.5(2016):3072—3082.

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