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Liu D, Zhu H, Gong X, Yuan S, Ma H, He P, Fan Y, Zhao W, Ren H, Guo W. Understanding and controlling the formation of single-atom site from supported Cu 10 cluster by tuning CeO 2 reducibility: Theoretical insight into the Gd-doping effect on electronic metal-support interaction. J Colloid Interface Sci 2024; 661:720-729. [PMID: 38320408 DOI: 10.1016/j.jcis.2024.01.174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 01/18/2024] [Accepted: 01/25/2024] [Indexed: 02/08/2024]
Abstract
Controlling the formation of single-atom (SA) sites from supported metal clusters is an important and interesting issue to effectively improve the catalytic performance of heterogeneous catalysts. For extensively studied CO oxidation over metal/CeO2 systems, the SA formation and stabilization under reaction conditions is generally attributed to CO adsorption, however, the pivotal role played by the reducible CeO2 support and the underlying electronic metal-support interaction (EMSI) are not yet fully understood. Based on a ceria-supported Cu10 catalyst model, we performed density functional theory calculations to investigate the intrinsic SA formation mechanism and discussed the synergistic effect of Gd-doped CeO2 and CO adsorption on the SA formation. The CeO2 reducibility is tuned with doped Gd content ranging from 12.5 % ∼ 25 %. Based on ab initio thermodynamic and ab initio molecular dynamics, the critical condition for SA formation was identified as 21.875 % Gd-doped CeO2 with CO-saturated adsorption on Cu10. Electronic analysis revealed that the open-shell lattice Oδ- (δ < 2) generated by Gd doping facilitates the charge transfer from the bottom-corner Cu (Cubc) to CeO2. The CO-saturated adsorption further promotes this charge transfer process and enhances the EMSI between Cubc and CeO2, leading to the disintegration of Cubc from Cu10 and subsequent formation of the active SA site.
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Affiliation(s)
- Dongyuan Liu
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, PR China
| | - Houyu Zhu
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, PR China.
| | - Xiaoxiao Gong
- State Key Laboratory of Molecular & Process Engineering, SINOPEC Research Institute of Petroleum Processing Co., Ltd., Beijing 10083, PR China
| | - Saifei Yuan
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, PR China
| | - Hao Ma
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, PR China
| | - Ping He
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, PR China
| | - Yucheng Fan
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, PR China
| | - Wen Zhao
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, PR China
| | - Hao Ren
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, PR China
| | - Wenyue Guo
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, PR China.
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Kuang Y, Zhou S, Liu Y, Feng X, Chen L, Zheng J, Ouyang G. Nanoscale-controlled organicinorganic hybrid spheres for comprehensive enrichment of ultratrace chlorobenzenes in marine and fresh water. JOURNAL OF HAZARDOUS MATERIALS 2024; 466:133541. [PMID: 38286049 DOI: 10.1016/j.jhazmat.2024.133541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/26/2023] [Accepted: 01/14/2024] [Indexed: 01/31/2024]
Abstract
The size of the adsorbent has the potential to influence extraction performance, but the size effect at the nanoscale is still poorly understood. In this study, organic-inorganic hybrid nanospheres (OIHNs) with controllable nanoscale sizes of 30, 50, and 100 nm were successfully prepared. These materials were further fabricated as solid phase microextraction (SPME) coatings with similar thicknesses, and coupled with gas chromatography-mass spectrometry (GC-MS) to investigate their extraction performance. The results showed that the extraction capacities of OIHNs for chlorobenzenes (CBs) and polycyclic aromatic hydrocarbons (PAHs) were much better than those of their corresponding derived carbon materials, despite the smaller specific surface areas and lower porosities of them. In addition, the enrichment performance increased significantly with decreasing particle size, and the OIHN-30 coating demonstrated the best performance, with enrichment factors ranging from 1098 to 6853 for CBs. Finally, a highly sensitive and practical analytical method was established with a wide linear range of 0.5-5000 ng·L-1, and the limits of quantification (LOQs) were 0.43-1.7 ng·L-1. The determinations of ultratrace CBs in five marine water samples and five fresh water samples were realized successfully. This study is expected to contribute to a deep understanding of the environmental effects of nanoparticles and the design of high-performance adsorbents.
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Affiliation(s)
- Yixin Kuang
- Ministry of Education (MOE) Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China
| | - Suxin Zhou
- Ministry of Education (MOE) Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China
| | - Yuefan Liu
- Key Laboratory of Hunan Province for Advanced Carbon-based Functional Materials, School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Xiaoying Feng
- School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
| | - Luyi Chen
- School of Chemistry, Guangzhou Key Laboratory of Materials for Energy Conversion and Storage, Guangdong Provincial Engineering Technology Research Center for Materials for Energy Conversion and Storage, South China Normal University, Guangzhou 510006, China.
| | - Juan Zheng
- School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China.
| | - Gangfeng Ouyang
- Ministry of Education (MOE) Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China; School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
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Zhao K, Janulaitis N, Rumptz JR, Campbell CT. Size-Dependent Energy and Adhesion of Pd Nanoparticles on Graphene on Ni(111) by Pd Vapor Adsorption Calorimetry. ACS Catal 2023. [DOI: 10.1021/acscatal.2c06343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Affiliation(s)
- Kun Zhao
- Department of Chemistry, University of Washington, Seattle, Washington98105-1700, United States
- Advanced Institute for Materials Research, Tohoku University, Sendai, Miyagi980-8577, Japan
| | - Nida Janulaitis
- Department of Chemical Engineering, University of Washington, Seattle, Washington98105-1700, United States
| | - John R. Rumptz
- Department of Chemical Engineering, University of Washington, Seattle, Washington98105-1700, United States
| | - Charles T. Campbell
- Department of Chemistry, University of Washington, Seattle, Washington98105-1700, United States
- Department of Chemical Engineering, University of Washington, Seattle, Washington98105-1700, United States
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Rumptz JR, Zhao K, Mayo J, Campbell CT. Size-Dependent Energy of Ni Nanoparticles on Graphene Films on Ni(111) and Adhesion Energetics by Adsorption Calorimetry. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- John R. Rumptz
- Department of Chemical Engineering, and University of Washington, Seattle, Washington 98105-1700, United States
| | - Kun Zhao
- Department of Chemistry, and University of Washington, Seattle, Washington 98105-1700, United States
| | - Jackson Mayo
- Department of Chemistry, and University of Washington, Seattle, Washington 98105-1700, United States
| | - Charles T. Campbell
- Department of Chemical Engineering, and University of Washington, Seattle, Washington 98105-1700, United States
- Department of Chemistry, and University of Washington, Seattle, Washington 98105-1700, United States
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Rumptz JR, Mao Z, Campbell CT. Size-Dependent Adsorption and Adhesion Energetics of Ag Nanoparticles on Graphene Films on Ni(111) by Calorimetry. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05589] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Singh JP, Singh V, Sharma A, Pandey G, Chae KH, Lee S. Approaches to synthesize MgO nanostructures for diverse applications. Heliyon 2020; 6:e04882. [PMID: 33024853 PMCID: PMC7527648 DOI: 10.1016/j.heliyon.2020.e04882] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 02/26/2020] [Accepted: 09/07/2020] [Indexed: 10/27/2022] Open
Abstract
Magnesium oxide remained interesting from long time for several important phenomena like; defect induced magnetism, spin electron reflectivity, broad laser emission etc. Moreover, nanostructures of this material exhibited suitability for different kinds of applications ranging from wastewater treatment to spintronics depending upon their shape and size. In this way, researchers had grown nanostructures in the form of nanoparticles, thin films, nanotubes, nanowalls, nanobelts. Though nanoparticles and thin films are well known form of nanostructures and wide variety of synthesis approaches are available, however, limited methodology for other nanostructures are available. In order to grow these nanostructures in an optimized way an understanding of these methods is essential. Thus, this review article depicts an overview of various approaches for design of different kinds of nanostructures.
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Affiliation(s)
- Jitendra Pal Singh
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea
| | - Varsha Singh
- Advanced Analysis Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Aditya Sharma
- Department of Physics, Manav Rachna University, Faridabad, Haryana, 121004, India
| | - Ganesh Pandey
- University of Petroleum & Energy Studies (UPES), Dehradun, Uttarakhand, 248007, India
- Gus Global Services ( India) Private Limited, Gurugram, Haryana, 122011, India
| | - Keun Hwa Chae
- Advanced Analysis Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Sangsul Lee
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea
- Xavisoptics Ltd., Pohang 37673, Republic of Korea
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Pilarska AA, Klapiszewski Ł, Jesionowski T. Recent development in the synthesis, modification and application of Mg(OH)2 and MgO: A review. POWDER TECHNOL 2017. [DOI: 10.1016/j.powtec.2017.07.009] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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