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Catalytic ativities of single-atom catalysts for CO oxidation: Pti/FeOx vs. Fe-1/FeOx
Liang, Jinxia1,2,3; Yang, Xiaofeng4; Xu, Congqiao2,3; Zhang, Tao4; Li, Jun2,3
关键词Single-atom Catalyst Feox Substrate Density Functional Theory Heterogeneous Catalysis Co Oxidation
刊名CHINESE JOURNAL OF CATALYSIS
2017-09-01
DOI10.1016/S1872-2067(17)62879-1
38期:9页:1566-1573
收录类别SCI ; ISTP
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
研究领域[WOS]Chemistry ; Engineering
关键词[WOS]GAS SHIFT REACTION ; AUGMENTED-WAVE METHOD ; LOW-TEMPERATURE ; SUPPORTED SINGLE ; METAL ; GOLD ; SURFACE ; REDUCTION ; PD ; PERFORMANCE
英文摘要An FeOx-based Pt single-atom catalyst (SAC), Pti/FeOx has stimulated significant recent interest owing to its extraordinary activity toward CO oxidation. The concept of SAC has also been successfully extended to other FeOx, supported transition metal systems both experimentally and theoretically. However, the FeOx substrate itself (denoted by Fei/FeOx following the same nomenclature of Pt-1/FeOx) as a typical transition metal oxide possesses a very low catalytic activity toward CO oxidation, although it can be viewed as Fe-1/FeOx SAC. Here, to understand the catalytic mechanism of FeOx-based SACs for CO oxidation, we have performed density functional theory calculations on Pt-1/FeOx and Fe-1/FeOx for CO oxidation to address the differences between these two SACs in terms of the catalytic mechanism of CO oxidation and the chemical behavior of the catalysts. Our calculation results indicated that the catalytic cycle of Fei/FeOx is much more difficult to accomplish than that of SAC Pt-1/FeO, because of a high activation barrier (1.09 eV) for regeneration of the oxygen vacancy formed when the second CO2 molecule desorbs from the surface. Moreover, density of states and Bader charge analysis revealed differences in the catalytic performance for CO oxidation by the SACs Fe-1/FeOx and Pt-1/FeOx,. This work provides insights into the fundamental interactions between the single-atom Pt-1 and FeOx substrate, and the exceptional catalytic performance of this system for CO oxidation. (C) 2017, Dalian Institute of Chemical Physics, Chinese Academy of Sciences.
语种英语
WOS记录号WOS:000411423600016
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/150118
专题中国科学院大连化学物理研究所
作者单位1.Guizhou Educ Univ, Guizhou Synerget Innovat Ctr Sci Big Data Adv Mfg, Guizhou Prov Key Lab Computat Nanomat Sci, Guiyang 550018, Guizhou, Peoples R China
2.Tsinghua Univ, Minist Educ, Dept Chem, Beijing 100084, Peoples R China
3.Tsinghua Univ, Minist Educ, Key Lab Organ Optoelect & Mol Engn, Beijing 100084, Peoples R China
4.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
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Liang, Jinxia,Yang, Xiaofeng,Xu, Congqiao,et al. Catalytic ativities of single-atom catalysts for CO oxidation: Pti/FeOx vs. Fe-1/FeOx[J]. CHINESE JOURNAL OF CATALYSIS,2017,38(9):1566-1573.
APA Liang, Jinxia,Yang, Xiaofeng,Xu, Congqiao,Zhang, Tao,&Li, Jun.(2017).Catalytic ativities of single-atom catalysts for CO oxidation: Pti/FeOx vs. Fe-1/FeOx.CHINESE JOURNAL OF CATALYSIS,38(9),1566-1573.
MLA Liang, Jinxia,et al."Catalytic ativities of single-atom catalysts for CO oxidation: Pti/FeOx vs. Fe-1/FeOx".CHINESE JOURNAL OF CATALYSIS 38.9(2017):1566-1573.
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