Deep Understanding of Strong Metal Interface Confinement: A Journey of Pd/FeOx Catalysts

doi:10.1021/acscatal.0c01447

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	Deep Understanding of Strong Metal Interface Confinement: A Journey of Pd/FeOx Catalysts
	Liu, Jixing ; Wang, Lu ; Okejiri, Francis ; Luo, Jing ; Zhao, Jiahua ; Zhang, Pengfei ; Liu, Miaomiao ; Yang, Shize ; Zhang, Zihao ; Song, Weiyu
刊名	ACS CATALYSIS
	2020
卷号	10 期号:15 页码:8950-8959
关键词	SUPPORT INTERACTIONS CO2 HYDROGENATION IN-SITU OXIDE OXIDATION WATER NANOPARTICLES ADSORPTION NO TRANSFORMATION
DOI	10.1021/acscatal.0c01447
英文摘要	Tuning the atomic interface configuration of noble metals (NMs) and transition-metal oxides is an effective straightforward yet challenging strategy to modulate the activity and stability of heterogeneous catalysts. Herein, Pd supported on mesoporous Fe2O3 with a high specific surface area was rationally designed and chosen to construct the Pd/iron oxide interface. As a versatile model, the physicochemical environments of Pd nanoparticles (NPs) could be precisely controlled by taming the reduction temperature. The experimental and density functional theory calculation results unveiled that the catalyst in the support-metal interface confinement (SMIC) state showed significantly enhanced catalytic activity and sintering resistance for CO oxidation. The constructed Fe sites at the interfaces between FeOx overlayers and Pd NPs not only provided additional coordinative unsaturated ferrous sites for the adsorption and activation of O-2, thereby facilitating the activation efficiency of O-2, but also impressively changed the reaction pathway of CO oxidation. As a result, the catalyst followed the Pd/Fe dual-site mechanism instead of the classical Mars-van Krevelen mechanism. For the catalyst in the strong metal-support interaction (SMSI) state, its catalytic activity was seriously suppressed because of the excessive encapsulation of the active Pd sites by FeOx overlayers. The present study therefore provides detailed insights into the SMIC and SMSI in ferric oxide-supported Pd catalysts, which could guide the preparation of highly efficient supported catalysts for practical applications.
学科主题	Chemistry
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20595]
专题	2020专题
作者单位	1.Feng, GD (corresponding author), Baoji Univ Arts & Sci, Key Lab Adv Mol Engn Mat, Coll Chem & Chem Engn, Baoji 721013, Peoples R China. 2.Feng, GD (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China. 3.Dai, S (corresponding author), Oak Ridge Natl Lab, Chem Sci Div, Oak Ridge, TN 37831 USA. 4.Zhang, PF (corresponding author), Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China. 5.Liu, J (corresponding author), China Univ Petr, State Key Lab Heavy Oil, Beijing 102249, Peoples R China. 6.Liu, J (corresponding author), China Univ Petr, Beijing Key Lab Oil & Gas Pollut Control, Beijing 102249, Peoples R China. 7.Feng, GD 8.Dai, S (corresponding author), Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
推荐引用方式 GB/T 7714	Liu, Jixing,Wang, Lu,Okejiri, Francis,et al. Deep Understanding of Strong Metal Interface Confinement: A Journey of Pd/FeOx Catalysts[J]. ACS CATALYSIS,2020,10(15):8950-8959.
APA	Liu, Jixing.,Wang, Lu.,Okejiri, Francis.,Luo, Jing.,Zhao, Jiahua.,...&Dai, Sheng.(2020).Deep Understanding of Strong Metal Interface Confinement: A Journey of Pd/FeOx Catalysts.ACS CATALYSIS,10(15),8950-8959.
MLA	Liu, Jixing,et al."Deep Understanding of Strong Metal Interface Confinement: A Journey of Pd/FeOx Catalysts".ACS CATALYSIS 10.15(2020):8950-8959.