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
ISSN2155-5435
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
DOI10.1021/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.
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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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