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Elmutasim O, Hussien AG, Sharan A, AlKhoori S, Vasiliades MA, Taha IMA, Kim S, Harfouche M, Emwas AH, Anjum DH, Efstathiou AM, Yavuz CT, Singh N, Polychronopoulou K. Evolution of Oxygen Vacancy Sites in Ceria-Based High-Entropy Oxides and Their Role in N 2 Activation. ACS APPLIED MATERIALS & INTERFACES 2024; 16. [PMID: 38684003 PMCID: PMC11082846 DOI: 10.1021/acsami.3c16521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 04/01/2024] [Accepted: 04/05/2024] [Indexed: 05/02/2024]
Abstract
In this work, a relatively new class of materials, rare earth (RE) based high entropy oxides (HEO) are discussed in terms of the evolution of the oxygen vacant sites (Ov) content in their structure as the composition changes from binary to HEO using both experimental and computational tools; the composition of HEO under focus is the CeLaPrSmGdO due to the importance of ceria-related (fluorite) materials to catalysis. To unveil key features of quinary HEO structure, ceria-based binary CePrO and CeLaO compositions as well as SiO2, the latter as representative nonreducible oxide, were used and compared as supports for Ru (6 wt % loading). The role of the Ov in the HEO is highlighted for the ammonia production with particular emphasis on the N2 dissociation step (N2(ads) → Nads) over a HEO; the latter step is considered the rate controlling one in the ammonia production. Density functional theory (DFT) calculations and 18O2 transient isotopic experiments were used to probe the energy of formation, the population, and the easiness of formation for the Ov at 650 and 800 °C, whereas Synchrotron EXAFS, Raman, EPR, and XPS probed the Ce-O chemical environment at different length scales. In particular, it was found that the particular HEO composition eases the Ov formation in bulk, in medium (Raman), and in short (localized) order (EPR); more Ov population was found on the surface of the HEO compared to the binary reference oxide (CePrO). Additionally, HEO gives rise to smaller and less sharp faceted Ru particles, yet in stronger interaction with the HEO support and abundance of Ru-O-Ce entities (Raman and XPS). Ammonia production reaction at 400 °C and in the 10-50 bar range was performed over Ru/HEO, Ru/CePrO, Ru/CeLaO, and Ru/SiO2 catalysts; the Ru/HEO had superior performance at 10 bar compared to the rest of catalysts. The best performing Ru/HEO catalyst was activated under different temperatures (650 vs 800 °C) so to adjust the Ov population with the lower temperature maintaining better performance for the catalyst. DFT calculations showed that the HEO active site for N adsorption involves the Ov site adjacent to the adsorption event.
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Affiliation(s)
- Omer Elmutasim
- Mechanical
Engineering Department, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
- Center
for Catalysis and Separation (CeCaS), Khalifa
University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Aseel G. Hussien
- Mechanical
Engineering Department, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
- Center
for Catalysis and Separation (CeCaS), Khalifa
University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Abhishek Sharan
- Center
for Catalysis and Separation (CeCaS), Khalifa
University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
- Physics
Department, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Sara AlKhoori
- Mechanical
Engineering Department, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
- Center
for Catalysis and Separation (CeCaS), Khalifa
University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Michalis A. Vasiliades
- Department
of Chemistry, Heterogeneous Catalysis Laboratory, University of Cyprus, 1 University Avenue, University Campus, 2109 Nicosia, Cyprus
| | | | - Seokjin Kim
- Oxide
& Organic Nanomaterials for Energy & Environment (ONE) Laboratory,
Advanced Membranes & Porous Materials (AMPM) Center, and KAUST
Catalysis Center (KCC), Physical Science & Engineering (PSE), King Abdullah University of Science and Technology
(KAUST), Thuwal 23955, Saudi Arabia
| | - Messaoud Harfouche
- Synchrotron-Light
for Experimental Science and Applications in the Middle East (SESAME), Allan 19252, Jordan
| | - Abdul-Hamid Emwas
- Core
Laboratories, King Abdullah University of
Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Dalaver H. Anjum
- Center
for Catalysis and Separation (CeCaS), Khalifa
University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
- Physics
Department, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Angelos M. Efstathiou
- Department
of Chemistry, Heterogeneous Catalysis Laboratory, University of Cyprus, 1 University Avenue, University Campus, 2109 Nicosia, Cyprus
| | - Cafer T. Yavuz
- Oxide
& Organic Nanomaterials for Energy & Environment (ONE) Laboratory,
Advanced Membranes & Porous Materials (AMPM) Center, and KAUST
Catalysis Center (KCC), Physical Science & Engineering (PSE), King Abdullah University of Science and Technology
(KAUST), Thuwal 23955, Saudi Arabia
| | - Nirpendra Singh
- Center
for Catalysis and Separation (CeCaS), Khalifa
University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
- Physics
Department, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Kyriaki Polychronopoulou
- Mechanical
Engineering Department, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
- Center
for Catalysis and Separation (CeCaS), Khalifa
University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
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Peng X, Zhang M, Zhang T, Zhou Y, Ni J, Wang X, Jiang L. Single-atom and cluster catalysts for thermocatalytic ammonia synthesis at mild conditions. Chem Sci 2024; 15:5897-5915. [PMID: 38665515 PMCID: PMC11041362 DOI: 10.1039/d3sc06998b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Accepted: 03/07/2024] [Indexed: 04/28/2024] Open
Abstract
Ammonia (NH3) is closely related to the fields of food and energy that humans depend on. The exploitation of advanced catalysts for NH3 synthesis has been a research hotspot for more than one hundred years. Previous studies have shown that the Ru B5 sites (step sites on the Ru (0001) surface uniquely arranged with five Ru atoms) and Fe C7 sites (iron atoms with seven nearest neighbors) over nanoparticle catalysts are highly reactive for N2-to-NH3 conversion. In recent years, single-atom and cluster catalysts, where the B5 sites and C7 sites are absent, have emerged as promising catalysts for efficient NH3 synthesis. In this review, we focus on the recent advances in single-atom and cluster catalysts, including single-atom catalysts (SACs), single-cluster catalysts (SCCs), and bimetallic-cluster catalysts (BCCs), for thermocatalytic NH3 synthesis at mild conditions. In addition, we discussed and summarized the unique structural properties and reaction performance as well as reaction mechanisms over single-atom and cluster catalysts in comparison with traditional nanoparticle catalysts. Finally, the challenges and prospects in the rational design of efficient single-atom and cluster catalysts for NH3 synthesis were provided.
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Affiliation(s)
- Xuanbei Peng
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University Fuzhou Fujian 350002 China
- Qingyuan Innovat Lab Quanzhou Fujian 362801 China
| | - Mingyuan Zhang
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University Fuzhou Fujian 350002 China
| | - Tianhua Zhang
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University Fuzhou Fujian 350002 China
| | - Yanliang Zhou
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University Fuzhou Fujian 350002 China
- Qingyuan Innovat Lab Quanzhou Fujian 362801 China
| | - Jun Ni
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University Fuzhou Fujian 350002 China
| | - Xiuyun Wang
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University Fuzhou Fujian 350002 China
- Qingyuan Innovat Lab Quanzhou Fujian 362801 China
| | - Lilong Jiang
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University Fuzhou Fujian 350002 China
- Qingyuan Innovat Lab Quanzhou Fujian 362801 China
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Pellegrino AL, Lo Presti F, Malandrino G. Metalorganic Chemical Vapor Deposition Approach to the Synthesis of Perovskite BaCeO 3 and BaCe 0.8Y 0.2O 3 Thin Films. Molecules 2023; 28:molecules28083303. [PMID: 37110536 PMCID: PMC10146848 DOI: 10.3390/molecules28083303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 04/03/2023] [Accepted: 04/05/2023] [Indexed: 04/29/2023] Open
Abstract
In the present energetic scenario, the development of materials with high potentiality in the technological fields of energy conversion processes, production and storage of hydrogen, are of great interest in the scientific community. In particular, we report for the first time the fabrication of crystalline and homogeneous barium-cerate-based materials in the form of thin films on various substrates. Starting from the β-diketonate precursor sources Ce(hfa)3diglyme, Ba(hfa)2tetraglyme and Y(hfa)3diglyme (Hhfa = 1,1,1,5,5,5-hexafluoroacetylacetone; diglyme = bis(2-methoxyethyl)ether; tetraglyme = 2,5,8,11,14-pentaoxapentadecane), a metalorganic chemical vapor deposition (MOCVD) approach has been successfully applied to the fabrication of BaCeO3 and doped BaCe0.8Y0.2O3 systems in the form of thin films. Structural, morphological and compositional analyses allowed for an accurate determination of the properties of deposited layers. The present approach represents a simple, easily scalable, and industrially appealing process for the production of compact and homogeneous barium cerate thin films.
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Affiliation(s)
- Anna L Pellegrino
- Dipartimento di Scienze Chimiche, Università di Catania, and INSTM UdR Catania, Viale A. Doria 6, I-95125 Catania, Italy
| | - Francesca Lo Presti
- Dipartimento di Scienze Chimiche, Università di Catania, and INSTM UdR Catania, Viale A. Doria 6, I-95125 Catania, Italy
| | - Graziella Malandrino
- Dipartimento di Scienze Chimiche, Università di Catania, and INSTM UdR Catania, Viale A. Doria 6, I-95125 Catania, Italy
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Efficient ammonia synthesis over Ru/CeO2-PrOx catalysts with controlled Ru dispersion by Ru-Pr interaction. J Catal 2022. [DOI: 10.1016/j.jcat.2022.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Zhou Y, Peng X, Zhang T, Cai H, Lin B, Zheng L, Wang X, Jiang L. Essential Role of Ru–Anion Interaction in Ru-Based Ammonia Synthesis Catalysts. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01486] [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)
- Yanliang Zhou
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian 350002, P. R. China
- Qingyuan Innovation Laboratory, Quanzhou, Fujian 362100, P. R. China
| | - Xuanbei Peng
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian 350002, P. R. China
| | - Tianhua Zhang
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian 350002, P. R. China
- Qingyuan Innovation Laboratory, Quanzhou, Fujian 362100, P. R. China
| | - Hongfang Cai
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian 350002, P. R. China
| | - Bingyu Lin
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian 350002, P. R. China
- Qingyuan Innovation Laboratory, Quanzhou, Fujian 362100, P. R. China
| | - Lirong Zheng
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xiuyun Wang
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian 350002, P. R. China
- Qingyuan Innovation Laboratory, Quanzhou, Fujian 362100, P. R. China
| | - Lilong Jiang
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian 350002, P. R. China
- Qingyuan Innovation Laboratory, Quanzhou, Fujian 362100, P. R. China
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Facile MOF-derived one-pot synthetic approach toward Ru single atoms, nanoclusters, and nanoparticles dispersed on CeO2 supports for enhanced ammonia synthesis. J Catal 2022. [DOI: 10.1016/j.jcat.2022.03.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Zhou Y, Xu CQ, Tan Z, Cai H, Wang X, Li J, Zheng L, Au CT, Li J, Jiang L. Integrating Dissociative and Associative Routes for Efficient Ammonia Synthesis over a TiCN-Promoted Ru-Based Catalyst. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05613] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Yanliang Zhou
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fujian 350002, P. R. China
- Qingyuan Innovation Laboratory, Fujian 362100, P. R. China
| | - Cong-Qiao Xu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, P. R. China
| | - Zhenni Tan
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fujian 350002, P. R. China
| | - Hongfang Cai
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fujian 350002, P. R. China
| | - Xiuyun Wang
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fujian 350002, P. R. China
- Qingyuan Innovation Laboratory, Fujian 362100, P. R. China
| | - Jialiang Li
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Lirong Zheng
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Chak-tong Au
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fujian 350002, P. R. China
| | - Jun Li
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, P. R. China
- Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Lilong Jiang
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fujian 350002, P. R. China
- Qingyuan Innovation Laboratory, Fujian 362100, P. R. China
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Zhou Y, Sai Q, Tan Z, Wang C, Wang X, Lin B, Ni J, Lin J, Jiang L. Highly efficient subnanometer Ru-based catalyst for ammonia synthesis via an associative mechanism. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2022.01.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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