Sinter Resistance and Activity Enhancement via a Facet-Dependent Metal-Support Interaction of Pd/ZnO Catalysts in CO Oxidation

doi:10.1021/acs.jpcc.1c06345

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	Sinter Resistance and Activity Enhancement via a Facet-Dependent Metal-Support Interaction of Pd/ZnO Catalysts in CO Oxidation
	Pu, Yinghui 1,2; Niu, Yiming 1,2; Wang, Yongzhao 1,2; Liang, Qing 1; Zhang, Lei 1; Zhang, Bingsen 1,2
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2021-09-23
卷号	125 期号:37 页码:20351-20359
ISSN号	1932-7447
DOI	10.1021/acs.jpcc.1c06345
通讯作者	Niu, Yiming(ymniu14b@imr.ac.cn) ; Zhang, Bingsen(bszhang@imr.ac.cn)
英文摘要	Metal-support interaction (MSI) has been extensively investigated regarding its structural and catalytic modification in heterogeneous catalysts. Herein, we reveal how facet-dependent MSI impacts on the structure and performance of Pd/ZnO in the CO oxidation reaction. ZnO nanosheets with orthohexagonal shape which are exposed mainly with {001} facets exhibit remarkable thermal stability under air atmosphere until 600 degrees C, while ZnO nanorods bounded with {100} facets transform at 400 degrees C and totally change after calcination at 600 degrees C. Thus, the Pd species supported on ZnO nanorods and nanosheets also display different sintering behaviors after thermal treatment, and the particle size of Pd grows from 1.1 to 5.7 nm on {100} facets while it keeps high-dispersion on {001} facets after 600 degrees C calcination. In situ transmission electron microscopy was used to visualize the sintering process, demonstrating that Pd displays the Ostwald ripening and particle migration coalescence mechanism on ZnO {100} facets, while shows extraordinary stability on ZnO {001} facets. Therefore, Pd supported on ZnO nanorod exhibits deactivation behavior after high temperature treatment in CO oxidation, during which the T-50 delays from 106 to 120 and 145 degrees C after 200, 400, and 600 degrees C calcination. Interestingly, Pd on ZnO nanosheet shows obvious activity enhancement from 137 to 90 and 75 degrees C of T-50 after the same treatment, which is ascribed to the synergy between Pd and ZnO {001} facets during catalysis. This work gives indepth understanding of the facet-dependent MSI of Pd/ZnO catalysts, and it sheds light on the rational design of heterogeneous catalysts with high efficiency and sinter resistance.
资助项目	National Natural Science Foundation of China[22072164] ; National Natural Science Foundation of China[22002173] ; National Natural Science Foundation of China[51932005] ; National Natural Science Foundation of China[21773269] ; National Natural Science Foundation of China[21761132025] ; Postdoctoral Science Foundation of China[2020M680999] ; LiaoNing Revitalization Talents Program[XLYC 1807175] ; Research Fund of SYNL
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000702017100020
资助机构	National Natural Science Foundation of China ; Postdoctoral Science Foundation of China ; LiaoNing Revitalization Talents Program ; Research Fund of SYNL
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/166724]
专题	金属研究所_中国科学院金属研究所
通讯作者	Niu, Yiming; Zhang, Bingsen
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Pu, Yinghui,Niu, Yiming,Wang, Yongzhao,et al. Sinter Resistance and Activity Enhancement via a Facet-Dependent Metal-Support Interaction of Pd/ZnO Catalysts in CO Oxidation[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2021,125(37):20351-20359.
APA	Pu, Yinghui,Niu, Yiming,Wang, Yongzhao,Liang, Qing,Zhang, Lei,&Zhang, Bingsen.(2021).Sinter Resistance and Activity Enhancement via a Facet-Dependent Metal-Support Interaction of Pd/ZnO Catalysts in CO Oxidation.JOURNAL OF PHYSICAL CHEMISTRY C,125(37),20351-20359.
MLA	Pu, Yinghui,et al."Sinter Resistance and Activity Enhancement via a Facet-Dependent Metal-Support Interaction of Pd/ZnO Catalysts in CO Oxidation".JOURNAL OF PHYSICAL CHEMISTRY C 125.37(2021):20351-20359.