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Deng L, Sun T, Zhang S, Li Y, Zhong Q, Pang H, Li X, Zhao Y, Xie G. Effect of vanadium and tungsten loading order on the denitration performance of F-doped V 2O 5-WO 3/TiO 2 catalysts. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:32200-32211. [PMID: 38644427 DOI: 10.1007/s11356-024-33411-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 04/15/2024] [Indexed: 04/23/2024]
Abstract
F-doped V2O5-WO3/TiO2 catalyst has been confirmed to have excellent denitration activity at low temperatures. Since the V2O5-WO3/TiO2 catalyst is a structure-sensitive catalyst, the loading order of V2O5 and WO3 may affect its denitration performance. In this paper, a series of F-doped V2O5-WO3/TiO2 catalysts with different V2O5 and WO3 loading orders were synthesized to investigate the effect of denitration performance at low temperatures. It was found that the loading orders led to significant gaps in denitration performance in the range of 120-240 °C. The results indicated loading WO3 first better utilized the oxygen vacancies on the TiF carrier promoting the generation of reduced vanadium species. In addition, loading WO3 first facilitated the dispersion of V2O5 thus enhanced the NH3 adsorption capacity of VWTiF. In situ DRIFT verified the rapid reaction between NO2, nitrate, and nitrite species and adsorbed NH3 over the VWTiF, confirming that the NH3 selective catalytic reduction (NH3-SCR) reaction over VWTiF at 240 °C proceeded by the Langmuir-Hinshelwood (L-H) mechanism. This research established the constitutive relationship between the loading order of V2O5 and WO3 and the denitration performance of the F-doped VWTi catalyst providing insights into the catalyst design process.
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Affiliation(s)
- Lifeng Deng
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China
| | - Tangxu Sun
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450066, People's Republic of China
| | - Shule Zhang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China.
| | - Yu Li
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450066, People's Republic of China
| | - Qin Zhong
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China
| | - Huiwen Pang
- China Construction Ecoenvironm Protect Technol Co, Suzhou, 215100, PR China
| | - Xiang Li
- China Construction Ecoenvironm Protect Technol Co, Suzhou, 215100, PR China
| | - Yunyan Zhao
- Shandong Aluminum Industry Corporation Limited, Zibo, 255052, People's Republic of China
| | - Guangbo Xie
- Shandong Aluminum Industry Corporation Limited, Zibo, 255052, People's Republic of China
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2
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Song I, Koleva IZ, Aleksandrov HA, Chen L, Heo J, Li D, Wang Y, Szanyi J, Khivantsev K. Ultrasmall Pd Clusters in FER Zeolite Alleviate CO Poisoning for Effective Low-Temperature Carbon Monoxide Oxidation. J Am Chem Soc 2023; 145:27493-27499. [PMID: 38059304 DOI: 10.1021/jacs.3c08916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
Ultrasmall Pd4 clusters form in the micropores of FER zeolite during low-temperature treatment (100 °C) in the presence of humid CO gas. They effectively catalyze CO oxidation below 100 °C, whereas Pd nanoparticles are not active as they are poisoned by CO. Using catalytic measurements, infrared (IR) spectroscopy, X-ray absorption spectroscopy (EXAFS), microscopy, and density functional theory calculations, we provide the molecular-level insight into this previously unreported phenomenon. Pd nanoparticles get covered with CO at low temperatures, which effectively blocks O2 activation until CO desorption occurs. Small Pd clusters in zeolites, in contrast, demonstrate fluxional behavior in the presence of CO, which significantly increases the affinity for binding O2. Our study provides a pathway to achieve low-temperature CO oxidation activity on the basis of a well-defined Pd/zeolite system.
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Affiliation(s)
- Inhak Song
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Iskra Z Koleva
- Faculty of Chemistry and Pharmacy, Sofia University "St. Kliment Ohridski", 1, J. Bourchier Boulevard, 1126 Sofia, Bulgaria
| | - Hristiyan A Aleksandrov
- Faculty of Chemistry and Pharmacy, Sofia University "St. Kliment Ohridski", 1, J. Bourchier Boulevard, 1126 Sofia, Bulgaria
| | - Linxiao Chen
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Jaeyoung Heo
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Dongsheng Li
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Yong Wang
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - János Szanyi
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Konstantin Khivantsev
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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3
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Huang S, Wang Q, Shan Y, Shi X, Liu Z, He H. Effects of Si/Al Ratio on Passive NO x Adsorption Performance over Pd/Beta Zeolites. Molecules 2023; 28:molecules28083501. [PMID: 37110735 PMCID: PMC10145102 DOI: 10.3390/molecules28083501] [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: 03/21/2023] [Revised: 04/07/2023] [Accepted: 04/13/2023] [Indexed: 04/29/2023] Open
Abstract
In the current article, the effect of Si/Al ratio on the NOx adsorption and storage capacity over Pd/Beta with 1 wt% Pd loading was investigated. The XRD, 27Al NMR and 29Si NMR measurements were used to determine the structure of Pd/Beta zeolites. XAFS, XPS, CO-DRIFT, TEM and H2-TPR were used to identify the Pd species. The results showed that the NOx adsorption and storage capacity on Pd/Beta zeolites gradually decreased with the increase of Si/Al ratio. Pd/Beta-Si (Si-rich, Si/Al~260) rarely has NOx adsorption and storage capacity, while Pd/Beta-Al (Al-rich, Si/Al~6) and Pd/Beta-C (Common, Si/Al~25) exhibit excellent NOx adsorption and storage capacity and suitable desorption temperature. Pd/Beta-C has slightly lower desorption temperature compared to Pd/Beta-Al. The NOx adsorption and storage capacity increased for Pd/Beta-Al and Pd/Beta-C by hydrothermal aging treatment, while the NOx adsorption and storage capacity on Pd/Beta-Si had no change.
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Affiliation(s)
- Shasha Huang
- Beijing Key Laboratory for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
- Engineering Research Center for Water Pollution Source Control & Eco-Remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Qiang Wang
- Beijing Key Laboratory for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
- Engineering Research Center for Water Pollution Source Control & Eco-Remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Yulong Shan
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoyan Shi
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhongqi Liu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hong He
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
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4
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Tang X, Ye J, Guo L, Pu T, Cheng L, Cao XM, Guo Y, Wang L, Guo Y, Zhan W, Dai S. Atomic Insights into the Cu Species Supported on Zeolite for Direct Oxidation of Methane to Methanol via Low-Damage HAADF-STEM. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2208504. [PMID: 37014632 DOI: 10.1002/adma.202208504] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 02/04/2023] [Indexed: 06/19/2023]
Abstract
Precise determination of the structure-property relationship of zeolite-based metal catalysts is critical for the development toward practical applications. However, the scarcity of real-space imaging of zeolite-based low-atomic-number (LAN) metal materials due to the electron-beam sensitivity of zeolites has led to continuous debates regarding the exact LAN metal configurations. Here, a low-damage high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) imaging technique is employed for direct visualization and determination of LAN metal (Cu) species in ZSM-5 zeolite frameworks. The structures of the Cu species are revealed based on the microscopy evidence and also proved by the complementary spectroscopy results. The correlation between the characteristic Cu size in Cu/ZSM-5 catalysts and their direct oxidation of methane to methanol reaction properties is unveiled. As a result, the mono-Cu species stably anchored by Al pairs inside the zeolite channels are identified as the key structure for higher C1 oxygenates yield and methanol selectivity for direct oxidation of methane. Meanwhile, the local topological flexibility of the rigid zeolite frameworks induced by the Cu agglomeration in the channels is also revealed. This work exemplifies the combination of microscopy imaging and spectroscopy characterization serves as a complete arsenal for revealing structure-property relationships of the supported metal-zeolite catalysts.
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Affiliation(s)
- Xuan Tang
- Key Laboratory for Advanced Materials, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China
| | - Jiajie Ye
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China
| | - Lisheng Guo
- Key Laboratory for Advanced Materials, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China
| | - Tiancheng Pu
- Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, Pennsylvania, 18015, United States
| | - Lu Cheng
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China
| | - Xiao-Ming Cao
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China
| | - Yanglong Guo
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China
| | - Li Wang
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China
| | - Yun Guo
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China
| | - Wangcheng Zhan
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China
| | - Sheng Dai
- Key Laboratory for Advanced Materials, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China
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5
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Li Y, Chen D, Xu X, Wang X, Kang R, Fu M, Guo Y, Chen P, Li Y, Ye D. Cold-Start NO x Mitigation by Passive Adsorption Using Pd-Exchanged Zeolites: From Material Design to Mechanism Understanding and System Integration. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:3467-3485. [PMID: 36802541 DOI: 10.1021/acs.est.2c06207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
It remains a major challenge to abate efficiently the harmful nitrogen oxides (NOx) in low-temperature diesel exhausts emitted during the cold-start period of engine operation. Passive NOx adsorbers (PNA), which could temporarily capture NOx at low temperatures (below 200 °C) and release the stored NOx at higher temperatures (normally 250-450 °C) to downstream selective catalytic reduction unit for complete abatement, hold promise to mitigate cold-start NOx emissions. In this review, recent advances in material design, mechanism understanding, and system integration are summarized for PNA based on palladium-exchanged zeolites. First, we discuss the choices of parent zeolite, Pd precursor, and synthetic method for the synthesis of Pd-zeolites with atomic Pd dispersions, and review the effect of hydrothermal aging on the properties and PNA performance of Pd-zeolites. Then, we show how different experimental and theoretical methodologies can be integrated to gain mechanistic insights into the nature of Pd active sites, the NOx storage/release chemistry, as well as the interactions between Pd and typical components/poisons in engine exhausts. This review also gathers several novel designs of PNA integration into modern exhaust after-treatment systems for practical application. At the end, we discuss the major challenges, as well as important implications, for the further development and real application of Pd-zeolite-based PNA in cold-start NOx mitigation.
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Affiliation(s)
- Ying Li
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Dongdong Chen
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Xin Xu
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Xinyu Wang
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Running Kang
- Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, 02150 Espoo, Finland
| | - Mingli Fu
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Yanbing Guo
- Institute of Environmental and Applied Chemistry, College of Chemistry, Central China Normal University, 430079 Wuhan, China
| | - Peirong Chen
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Yongdan Li
- Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, 02150 Espoo, Finland
| | - Daiqi Ye
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
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6
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Nkinahamira F, Yang R, Zhu R, Zhang J, Ren Z, Sun S, Xiong H, Zeng Z. Current Progress on Methods and Technologies for Catalytic Methane Activation at Low Temperatures. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2204566. [PMID: 36504369 PMCID: PMC9929156 DOI: 10.1002/advs.202204566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 10/21/2022] [Indexed: 06/17/2023]
Abstract
Methane (CH4 ) is an attractive energy source and important greenhouse gas. Therefore, from the economic and environmental point of view, scientists are working hard to activate and convert CH4 into various products or less harmful gas at low-temperature. Although the inert nature of CH bonds requires high dissociation energy at high temperatures, the efforts of researchers have demonstrated the feasibility of catalysts to activate CH4 at low temperatures. In this review, the efficient catalysts designed to reduce the CH4 oxidation temperature and improve conversion efficiencies are described. First, noble metals and transition metal-based catalysts are summarized for activating CH4 in temperatures ranging from 50 to 500 °C. After that, the partial oxidation of CH4 at relatively low temperatures, including thermocatalysis in the liquid phase, photocatalysis, electrocatalysis, and nonthermal plasma technologies, is briefly discussed. Finally, the challenges and perspectives are presented to provide a systematic guideline for designing and synthesizing the highly efficient catalysts in the complete/partial oxidation of CH4 at low temperatures.
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Affiliation(s)
- François Nkinahamira
- State Key Laboratory of Urban Water Resource and EnvironmentShenzhen Key Laboratory of Organic Pollution Prevention and ControlSchool of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen518055P. R. China
| | - Ruijie Yang
- Department of Materials Science and EngineeringCity University of Hong Kong83 Tat Chee AvenueKowloonHong Kong999077P. R. China
| | - Rongshu Zhu
- State Key Laboratory of Urban Water Resource and EnvironmentShenzhen Key Laboratory of Organic Pollution Prevention and ControlSchool of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen518055P. R. China
| | - Jingwen Zhang
- State Key Laboratory of Urban Water Resource and EnvironmentShenzhen Key Laboratory of Organic Pollution Prevention and ControlSchool of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen518055P. R. China
| | - Zhaoyong Ren
- State Key Laboratory of Urban Water Resource and EnvironmentShenzhen Key Laboratory of Organic Pollution Prevention and ControlSchool of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen518055P. R. China
| | - Senlin Sun
- State Key Laboratory of Urban Water Resource and EnvironmentShenzhen Key Laboratory of Organic Pollution Prevention and ControlSchool of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen518055P. R. China
| | - Haifeng Xiong
- State Key Laboratory of Physical Chemistry of Solid SurfacesCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005P. R. China
| | - Zhiyuan Zeng
- Department of Materials Science and EngineeringCity University of Hong Kong83 Tat Chee AvenueKowloonHong Kong999077P. R. China
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7
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Cai J, Zhao H, Li X, Jing G, Schwank JW. Improving the hydrothermal stability of Pd/SSZ-13 for low-temperature NO adsorption: promotional effect of the Mg 2+ co-cation. REACT CHEM ENG 2023. [DOI: 10.1039/d3re00024a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
Abstract
Insufficient hydrothermal stability is an issue that restricts application of Pd/SSZ-13 for low-temperature NO adsorption from vehicle emissions.
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Affiliation(s)
- Jinhuang Cai
- Department of Environmental Science & Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, China
| | - Huawang Zhao
- Department of Environmental Science & Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, China
| | - Xiang Li
- Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Espoo 02150, Finland
| | - Guohua Jing
- Department of Environmental Science & Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, China
| | - Johannes W. Schwank
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
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8
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Fang Y, Zhang Q, Zhang H, Li X, Chen W, Xu J, Shen H, Yang J, Pan C, Zhu Y, Wang J, Luo Z, Wang L, Bai X, Song F, Zhang L, Guo Y. Dual Activation of Molecular Oxygen and Surface Lattice Oxygen in Single Atom Cu
1
/TiO
2
Catalyst for CO Oxidation. Angew Chem Int Ed Engl 2022; 61:e202212273. [DOI: 10.1002/anie.202212273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Indexed: 11/19/2022]
Affiliation(s)
- Yarong Fang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Institute of Environmental and Applied Chemistry College of Chemistry Central China Normal University Wuhan 430079 China
| | - Qi Zhang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Institute of Environmental and Applied Chemistry College of Chemistry Central China Normal University Wuhan 430079 China
| | - Huan Zhang
- Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China
| | - Xiaomin Li
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Beijing 100190 China
| | - Wei Chen
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Institute of Environmental and Applied Chemistry College of Chemistry Central China Normal University Wuhan 430079 China
| | - Jue Xu
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Institute of Environmental and Applied Chemistry College of Chemistry Central China Normal University Wuhan 430079 China
| | - Huan Shen
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Institute of Environmental and Applied Chemistry College of Chemistry Central China Normal University Wuhan 430079 China
| | - Ji Yang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Institute of Environmental and Applied Chemistry College of Chemistry Central China Normal University Wuhan 430079 China
| | - Chuanqi Pan
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Institute of Environmental and Applied Chemistry College of Chemistry Central China Normal University Wuhan 430079 China
| | - Yuhua Zhu
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Institute of Environmental and Applied Chemistry College of Chemistry Central China Normal University Wuhan 430079 China
| | - Jinlong Wang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Institute of Environmental and Applied Chemistry College of Chemistry Central China Normal University Wuhan 430079 China
| | - Zhu Luo
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Institute of Environmental and Applied Chemistry College of Chemistry Central China Normal University Wuhan 430079 China
| | - Liming Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety Institute of High Energy Physics Department of Materials Science and Engineering Chinese Academy of Sciences Beijing 100049 China
| | - Xuedong Bai
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Beijing 100190 China
| | - Fei Song
- Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China
| | - Lizhi Zhang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Institute of Environmental and Applied Chemistry College of Chemistry Central China Normal University Wuhan 430079 China
| | - Yanbing Guo
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Institute of Environmental and Applied Chemistry College of Chemistry Central China Normal University Wuhan 430079 China
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9
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Hamid Y, Matarrese R, Morandi S, Castoldi L, Lietti L. Pd-Doped SSZ-13 for Low-T NOx Adsorption: an Operando FT-IR Spectroscopy Study. Top Catal 2022. [DOI: 10.1007/s11244-022-01737-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
AbstractIn this study, mechanistic aspects of NO adsorption/desorption over a home-made Pd/SSZ-13 passive NOx adsorber (PNA) catalyst are investigated. Operando FT-IR spectroscopy and microreactor experiments are performed to envisage the performance of the catalyst and the pathway involved in NO adsorption, with particular emphasis to the impact of species such as C3H6 and CO. In the absence of C3H6 and CO, NO is observed to adsorb as nitrosyls (anhydrous and hydrated) over both Pd2+ and Pd+ species, and as nitrates. 80 μmolNOx/gcat (NO/Pd molar ratio of 0.8) are adsorbed. The stability of nitrosyls is higher in comparison to the nitrates in that the former initially dehydrate and further decompose at elevated temperatures (> 300 °C) leading to the evolution of NO. The presence of CO and C3H6 negatively affects the amounts of NO adsorbed (53 and 45 μmolNOx/gcat, respectively) due to the reduction of Pd sites. CO admission to the catalyst forms a variety of carbonyl species over Pd2+, Pd+ and Pd0 sites which upon NO admission are readily displaced and NO is adsorbed as hydrated/anhydrous nitrosyls of Pdn+. The nitrosyls so formed exhibit lower thermal stability in comparison to nitrosyls observed in the absence of CO and decompose below 300 °C. The addition of C3H6 leads to the apparent formation of oxidized species like acetone, acrolein and acetates, besides propylene adsorption. The NO adsorption in the presence of C3H6 leads to the formation of Pdn+(NO)(X) complexes; upon heating the decomposition of this complexes is observed at low temperatures along with propylene and water desorption. Formation of organic nitro-compounds is also observed that decompose at higher temperatures.
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10
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Liu Z, Guan B, Guo J, Jiang H, Wei Y, Wu X, Lin H, Huang Z. Optimizing the Proportion of Framework Elements and the Distribution of Active Sites in Pd–SSZ-13 for Better Passive NO x Adsorber Performance. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Ziqian Liu
- Key Laboratory for Power Machine and Engineering of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Bin Guan
- Key Laboratory for Power Machine and Engineering of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jiangfeng Guo
- Key Laboratory for Power Machine and Engineering of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Han Jiang
- Key Laboratory for Power Machine and Engineering of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yanfei Wei
- Key Laboratory for Power Machine and Engineering of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xingze Wu
- Key Laboratory for Power Machine and Engineering of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
| | - He Lin
- Key Laboratory for Power Machine and Engineering of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zhen Huang
- Key Laboratory for Power Machine and Engineering of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
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11
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Yu Q, Zhang J, Pan R, Yi H, Tang X. Are zeolitic structure & Al necessary for Pd/zeolite being a superior passive NOx adsorber? J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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12
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In-situ studies on the synergistic effect of Pd-Mo bimetallic catalyst for anisole hydrodeoxygenation. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Elucidation of the reaction mechanism of indirect oxidative carbonylation of methanol to dimethyl carbonate on Pd/NaY catalyst: Direct identification of reaction intermediates. J Catal 2022. [DOI: 10.1016/j.jcat.2022.06.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Aljama HA, Head-Gordon M, Bell AT. Assessing the stability of Pd-exchanged sites in zeolites with the aid of a high throughput quantum chemistry workflow. Nat Commun 2022; 13:2910. [PMID: 35614062 PMCID: PMC9133006 DOI: 10.1038/s41467-022-29505-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 02/22/2022] [Indexed: 01/03/2023] Open
Abstract
Cation exchanged-zeolites are functional materials with a wide range of applications from catalysis to sorbents. They present a challenge for computational studies using density functional theory due to the numerous possible active sites. From Al configuration, to placement of extra framework cation(s), to potentially different oxidation states of the cation, accounting for all these possibilities is not trivial. To make the number of calculations more tractable, most studies focus on a few active sites. We attempt to go beyond these limitations by implementing a workflow for a high throughput screening, designed to systematize the problem and exhaustively search for feasible active sites. We use Pd-exchanged CHA and BEA to illustrate the approach. After conducting thousands of explicit DFT calculations, we identify the sites most favorable for the Pd cation and discuss the results in detail. The high throughput screening identifies many energetically favorable sites that are non-trivial. Lastly, we employ these results to examine NO adsorption in Pd-exchanged CHA, which is a promising passive NOx adsorbent (PNA) during the cold start of automobiles. The results shed light on critical active sites for NOx capture that were not previously studied.
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Affiliation(s)
- Hassan A Aljama
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA, USA
| | - Martin Head-Gordon
- Department of Chemistry, University of California, Berkeley, CA, USA.
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
| | - Alexis T Bell
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA, USA.
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15
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16
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Recent progress of Pd/zeolite as passive NOx adsorber: Adsorption chemistry, structure-performance relationships, challenges and prospects. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.07.066] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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18
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Abstract
The passive NOx adsorber (PNA) material has been considered an effective candidate for the control of NOx from diesel exhaust during the engine cold start stage, and Pd/SSZ-13 attracts peoples’ attention mainly due to its superior hydrothermal stability and sulfur resistance. However, chemical poisoning tolerance of Pd/SSZ-13 is another key parameter to its practical application and future development. Herein, we prepared potassium-loaded Pd/SSZ-13 and evaluated the influence on NOx adsorption ability. The characterization results revealed that the loading of potassium could not destruct the structure of SSZ-13 but impaired the BET surface area and pore structure through the sintering of Pd species to PdO. Meanwhile, the grown PdO phase restrained the NOx adsorption ability and promoted the generation of NO2 at high temperatures. Moreover, the presence of H2O could also impair the NOx adsorption ability due to the competitive adsorption between H2O and NOx. This work verifies that the design of Pd/SSZ-13 sample with stable Pd species and excellent hydrophobicity is significant for its further application under harsh conditions.
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19
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Khivantsev K, Wei X, Kovarik L, Jaegers NR, Walter ED, Tran P, Wang Y, Szanyi J. Palladium/Ferrierite versus Palladium/SSZ‐13 Passive NOx Adsorbers: Adsorbate‐Controlled Location of Atomically Dispersed Palladium(II) in Ferrierite Determines High Activity and Stability**. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202107554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Konstantin Khivantsev
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Xinyi Wei
- Environmental Catalysis Research Division BASF Iselin NJ 08830 USA
| | - Libor Kovarik
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Nicholas R. Jaegers
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Eric D. Walter
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Pascaline Tran
- Environmental Catalysis Research Division BASF Iselin NJ 08830 USA
| | - Yong Wang
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
- Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman WA 99164 USA
| | - János Szanyi
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
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20
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Zhu Y, Wang J, Zhai Y, Shen G, Wang J, Wang C, Shen M. The upgrading role of Al at T1/T2 sites in stabilizing Pd ions over Pd-beta passive NO x adsorbers under a reducing atmosphere. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00307d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The preserved Pd ions as γ and β sites related with Al at T1–T2 sites corresponded to the stabilized NOx storage capability and rendered a suitable desorption temperature.
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Affiliation(s)
- Yi Zhu
- Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Jun Wang
- Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P. R. China
- National Rare Earth Catalysis Research Institute, Dongying 257000, PR China
| | - Yanping Zhai
- National Rare Earth Catalysis Research Institute, Dongying 257000, PR China
| | - Gurong Shen
- Institute of New Energy Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Jianqiang Wang
- Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Chen Wang
- Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P. R. China
- National Rare Earth Catalysis Research Institute, Dongying 257000, PR China
- School of Environmental and Safety Engineering, North University of China, Taiyuan 030051, Shanxi, P. R. China
| | - Meiqing Shen
- Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P. R. China
- National Rare Earth Catalysis Research Institute, Dongying 257000, PR China
- State Key Laboratory of Engines, Tianjin University, Tianjin 300072, PR China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, PR China
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21
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Friberg I, Clark AH, Ho PH, Sadokhina N, Smales GJ, Woo J, Auvray X, Ferri D, Nachtegaal M, Kröcher O, Olsson L. Structure and performance of zeolite supported Pd for complete methane oxidation. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.11.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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22
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Kaushik M, Shrivastav G, Khan TS, Haider MA, Bhatia D. The Operating Cycle of NO Adsorption and Desorption in Pd-Chabazite for Passive NO x Adsorbers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:13799-13809. [PMID: 34766776 DOI: 10.1021/acs.langmuir.1c01383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Pd-doped chabazite (Pd/CHA) offers unique opportunities to adsorb and desorb NOx in the target temperature range for application as a passive NOx adsorber (PNA). The ability of Pd/CHA to trap NOx emissions at low temperatures (<200 °C) is facilitated by the binding of NOx species at various Pd sites available in the CHA framework. Density functional theory (DFT) simulations are performed to understand Pd speciation in CHA and the interaction of NO with Pd/CHA to explain the mechanisms of NO adsorption, oxidation, and desorption processes. The calculations are used to elucidate the important role of Pd1+ cationic species, anchored at 6MR-3NN, in providing a strong (Eb = -272 kJ/mol) NO adsorption site in Pd/CHA. For NO release, the redox transformation of Pd species comes into play and Pd1+ species are suggested to transform into cationic Pd2+, [PdOH]+, or [Pd-O-Pd]2+ species, all of which show significantly reduced NO binding (-116, -153, and -117 kJ/mol, respectively) as compared to Pd1+. This enables NO desorption at the operating temperature of a downstream catalyst for subsequent catalytic reduction.
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Affiliation(s)
- Marvi Kaushik
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Gourav Shrivastav
- Department of Chemical and Biological Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Tuhin S Khan
- Light Stock Processing Division, CSIR─Indian Institute of Petroleum, Mohkampur, Dehradun 248005, India
| | - M Ali Haider
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Divesh Bhatia
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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23
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Pace R, Lardinois TM, Ji Y, Gounder R, Heintz O, Crocker M. Effects of Treatment Conditions on Pd Speciation in CHA and Beta Zeolites for Passive NO x Adsorption. ACS OMEGA 2021; 6:29471-29482. [PMID: 34778619 PMCID: PMC8581994 DOI: 10.1021/acsomega.1c03440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 10/12/2021] [Indexed: 05/14/2023]
Abstract
The structure and evolution of Pd species in Pd-exchanged zeolite materials intended for use as passive NO x adsorbers were examined under various pretreatment conditions. Using in situ CO-diffuse reflectance infrared spectroscopy, Pd structures were characterized after 500 °C pretreatments in inert (Ar), water (1-2% H2O in Ar), oxidizing (air), and reducing (H2, CO) atmospheres. Two zeolites of similar Si/Al ratios but different framework topologies (Beta, CHA) were found to show different distributions of Pd species, depending on the reducing agent used. Reduction in H2 (500 °C; 10% H2 in Ar) followed by re-oxidation (500 °C; air) led to higher amounts of single-site Pd ions on Pd-CHA than Pd-Beta, whereas high-temperature reduction in CO (500 °C; 1000 ppm CO in Ar) followed by re-oxidation (500 °C; air) led to significant loss of ionic Pd on both Pd-CHA and Pd-Beta, albeit H2 temperature-programmed reduction and XPS experiments suggest that this phenomena may be limited to surface Pd. High-temperature treatments with water (500 °C; 1-2% H2O in Ar) are shown to form either Pd metal or PdO particles, with Pd-Beta being more susceptible to these effects than Pd-CHA. This work suggests that the effects of CO are especially problematic with respect to the durability of these materials in passive NO x adsorption applications, especially in the case of Beta zeolite.
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Affiliation(s)
- Robert
B. Pace
- Center
for Applied Energy Research, University
of Kentucky, 2540 Research Park Drive, Lexington, Kentucky 0511, United States
- Department
of Chemistry, University of Kentucky, 161 Jacobs Science Building, Lexington, Kentucky 40506, United States
| | - Trevor M. Lardinois
- Charles
D. Davidson School of Chemical Engineering, Purdue University, 701 W Stadium Ave. #3000, West Lafayette, Indiana 47907, United States
| | - Yaying Ji
- Center
for Applied Energy Research, University
of Kentucky, 2540 Research Park Drive, Lexington, Kentucky 0511, United States
| | - Rajamani Gounder
- Charles
D. Davidson School of Chemical Engineering, Purdue University, 701 W Stadium Ave. #3000, West Lafayette, Indiana 47907, United States
| | - Olivier Heintz
- Laboratoire
Interdisciplinaire Carnot de Bourgogne (LICB), UMR CNRS 6303, Université
de BourgogneFranche-Comté, 9 Avenue Alain Savary, 21078 Dijon Cedex, France
| | - Mark Crocker
- Center
for Applied Energy Research, University
of Kentucky, 2540 Research Park Drive, Lexington, Kentucky 0511, United States
- Department
of Chemistry, University of Kentucky, 161 Jacobs Science Building, Lexington, Kentucky 40506, United States
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24
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Chen D, Lei H, Xiong W, Li Y, Ji X, Yang JY, Peng B, Fu M, Chen P, Ye D. Unravelling Phosphorus-Induced Deactivation of Pd-SSZ-13 for Passive NO x Adsorption and CO Oxidation. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03214] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dongdong Chen
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Huarong Lei
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Wuwan Xiong
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Ying Li
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Xiang Ji
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Jia-Yue Yang
- Optics & Thermal Radiation Research Center, Shandong University, 266237 Qingdao, China
| | - Baoxiang Peng
- Laboratory of Industrial Chemistry, Ruhr University Bochum, 44780 Bochum, Germany
| | - Mingli Fu
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Peirong Chen
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Daiqi Ye
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
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25
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Ramirez A, Ticali P, Salusso D, Cordero-Lanzac T, Ould-Chikh S, Ahoba-Sam C, Bugaev AL, Borfecchia E, Morandi S, Signorile M, Bordiga S, Gascon J, Olsbye U. Multifunctional Catalyst Combination for the Direct Conversion of CO 2 to Propane. JACS AU 2021; 1:1719-1732. [PMID: 34723275 PMCID: PMC8549042 DOI: 10.1021/jacsau.1c00302] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Indexed: 06/13/2023]
Abstract
The production of carbon-rich hydrocarbons via CO2 valorization is essential for the transition to renewable, non-fossil-fuel-based energy sources. However, most of the recent works in the state of the art are devoted to the formation of olefins and aromatics, ignoring the rest of the hydrocarbon commodities that, like propane, are essential to our economy. Hence, in this work, we have developed a highly active and selective PdZn/ZrO2+SAPO-34 multifunctional catalyst for the direct conversion of CO2 to propane. Our multifunctional system displays a total selectivity to propane higher than 50% (with 20% CO, 6% C1, 13% C2, 10% C4, and 1% C5) and a CO2 conversion close to 40% at 350 °C, 50 bar, and 1500 mL g-1 h-1. We attribute these results to the synergy between the intimately mixed PdZn/ZrO2 and SAPO-34 components that shifts the overall reaction equilibrium, boosting CO2 conversion and minimizing CO selectivity. Comparison to a PdZn/ZrO2+ZSM-5 system showed that propane selectivity is further boosted by the topology of SAPO-34. The presence of Pd in the catalyst drives paraffin production via hydrogenation, with more than 99.9% of the products being saturated hydrocarbons, offering very important advantages for the purification of the products.
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Affiliation(s)
- Adrian Ramirez
- KAUST
Catalysis Center (KCC), King Abdullah University
of Science and Technology, Thuwal 23955, Saudi Arabia
| | - Pierfrancesco Ticali
- Department
of Chemistry, NIS Center and INSTM Reference Center, University of Turin, Turin 10125, Italy
| | - Davide Salusso
- Department
of Chemistry, NIS Center and INSTM Reference Center, University of Turin, Turin 10125, Italy
| | - Tomas Cordero-Lanzac
- SMN
Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Oslo N-0315, Norway
| | - Samy Ould-Chikh
- KAUST
Catalysis Center (KCC), King Abdullah University
of Science and Technology, Thuwal 23955, Saudi Arabia
| | - Christian Ahoba-Sam
- SMN
Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Oslo N-0315, Norway
| | - Aram L. Bugaev
- The
Smart Materials Research Institute, Southern
Federal University, Sladkova 178/24, Rostov-on-Don 344090, Russian Federation
| | - Elisa Borfecchia
- Department
of Chemistry, NIS Center and INSTM Reference Center, University of Turin, Turin 10125, Italy
| | - Sara Morandi
- Department
of Chemistry, NIS Center and INSTM Reference Center, University of Turin, Turin 10125, Italy
| | - Matteo Signorile
- Department
of Chemistry, NIS Center and INSTM Reference Center, University of Turin, Turin 10125, Italy
| | - Silvia Bordiga
- Department
of Chemistry, NIS Center and INSTM Reference Center, University of Turin, Turin 10125, Italy
| | - Jorge Gascon
- KAUST
Catalysis Center (KCC), King Abdullah University
of Science and Technology, Thuwal 23955, Saudi Arabia
| | - Unni Olsbye
- SMN
Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Oslo N-0315, Norway
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26
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Khivantsev K, Jaegers NR, Aleksandrov HA, Kovarik L, Derewinski MA, Wang Y, Vayssilov GN, Szanyi J. Biomimetic CO oxidation below -100 °C by a nitrate-containing metal-free microporous system. Nat Commun 2021; 12:6033. [PMID: 34654809 PMCID: PMC8519918 DOI: 10.1038/s41467-021-26157-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 09/10/2021] [Indexed: 11/16/2022] Open
Abstract
CO oxidation is of importance both for inorganic and living systems. Transition and precious metals supported on various materials can oxidize CO to CO2. Among them, few systems, such as Au/TiO2, can perform CO oxidation at temperatures as low as -70 °C. Living (an)aerobic organisms perform CO oxidation with nitrate using complex enzymes under ambient temperatures representing an essential pathway for life, which enables respiration in the absence of oxygen and leads to carbonate mineral formation. Herein, we report that CO can be oxidized to CO2 by nitrate at -140 °C within an inorganic, nonmetallic zeolitic system. The transformation of NOx and CO species in zeolite as well as the origin of this unique activity is clarified using a joint spectroscopic and computational approach.
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Affiliation(s)
| | | | | | - Libor Kovarik
- Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Miroslaw A Derewinski
- Pacific Northwest National Laboratory, Richland, WA, 99352, USA
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Krakow, 30-239, Poland
| | - Yong Wang
- Pacific Northwest National Laboratory, Richland, WA, 99352, USA
- Voiland School of Chemical Engineering and Bioengineering Washington State University, Pullman, WA, 99163, USA
| | - Georgi N Vayssilov
- Faculty of Chemistry and Pharmacy, University of Sofia, Sofia, 1126, Bulgaria
| | - Janos Szanyi
- Pacific Northwest National Laboratory, Richland, WA, 99352, USA.
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27
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Chen J, Giewont K, Walker EA, Lee J, Niu Y, Kyriakidou EA. Cobalt-Induced PdO Formation in Low-Loading Pd/BEA Catalysts for CH 4 Oxidation. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00400] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Junjie Chen
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Kevin Giewont
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Eric A. Walker
- Institute for Computational and Data Sciences, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Jungkuk Lee
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Yubiao Niu
- College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, U.K
| | - Eleni A. Kyriakidou
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
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28
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Yasumura S, Ueda T, Ide H, Otsubo K, Liu C, Tsunoji N, Toyao T, Maeno Z, Shimizu KI. Local structure and NO adsorption/desorption property of Pd 2+ cations at different paired Al sites in CHA zeolite. Phys Chem Chem Phys 2021; 23:22273-22282. [PMID: 34644369 DOI: 10.1039/d1cp02668b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recently, Pd-exchanged CHA zeolites (Pd-CHA) have attracted attention as promising passive NOx adsorbers (PNAs) for reducing NOx emissions during the cold start period of a vehicle engine. In this work, the relationship between the local structures and the NO adsorption/desorption properties of the Pd cations in CHA zeolites was investigated. Pd cation formation and NO adsorption were theoretically explored by density functional theory (DFT) calculations for different paired Al sites in six-/eight-membered rings (6MR/8MR). Furthermore, we prepared a series of Pd-CHAs with different Pd loadings (0.5-5.4 wt%) and evaluated their NO adsorption/desorption properties by in situ infrared (IR) spectroscopy and temperature-programmed desorption (TPD) measurements. The increase in the Pd loading resulted in a shift in the NO desorption temperature toward a higher temperature regime. This phenomenon was ascribed to the increase in the proportion of less stable Pd cations, resulting in improved NO adsorption. Furthermore, the effect of Al distribution on the NO adsorption property of Pd-CHA was examined using CHA zeolites containing different proportions of paired Al sites in 6MR while maintaining similar Si/Al ratios (Si/Al = 12.0-16.5). The present study, based on a combination of theoretical and experimental techniques, shows that the NO adsorption/desorption properties over Pd-CHA can be tuned by controlling the Pd loading amount and the type of paired Al sites.
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Affiliation(s)
- Shunsaku Yasumura
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan.
| | - Taihei Ueda
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan.
| | - Hajime Ide
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan.
| | - Katsumasa Otsubo
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Chong Liu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Nao Tsunoji
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Takashi Toyao
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan. .,Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, Katsura, Kyoto 615-8520, Japan
| | - Zen Maeno
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan.
| | - Ken-Ichi Shimizu
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan. .,Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, Katsura, Kyoto 615-8520, Japan
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29
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Khivantsev K, Wei X, Kovarik L, Jaegers NR, Walter ED, Tran P, Wang Y, Szanyi J. Pd/FER vs Pd/SSZ-13 Passive NOx Adsorbers: Adsorbate-controlled Location of Atomically Dispersed Pd(II) in FER Determines High Activity and Stability. Angew Chem Int Ed Engl 2021; 61:e202107554. [PMID: 34617372 DOI: 10.1002/anie.202107554] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Indexed: 11/10/2022]
Abstract
Pd-loaded FER and SSZ-13 zeolites as low-temperature passive NOx adsorbers (PNA) are compared under practical conditions. Vehicle cold-start exposes the material to CO under a range of concentrations, necessitating a systematic exploration of the effect of CO on the performance of isolated Pd ions in PNA. NO release temperature of both adsorbers decreases gradually with the increase of CO concentration from a few hundred to a few thousand ppm. This beneficial effect results from local nano-"hot spot" formation during CO oxidation. Dissimilar to Pd/SSZ-13, increasing the CO concentration above ~1,000 ppm improves the NOx storage significantly for Pd/FER, attributed to the presence of Pd ions in FER γ-site that is shielded from NOx. CO mobilizes this Pd atom to the NOx accessible position where it becomes active for PNA. This behavior explains the very high resistance of Pd/FER to hydrothermal aging: Pd/FER materials survive hydrothermal aging at 8000C in 10% H2O vapor for 16 hours with no deterioration in NOx uptake/release behavior. Thus, by allocating Pd ions to the specific microporous pockets in FER, we have produced (hydro)thermally stable and active PNA materials.
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Affiliation(s)
- Konstantin Khivantsev
- Pacific Northwest National Laboratory, Institute for Integrated Catalysis, 3335 Innovation blvd, EMSL BUILDING, PACIFIC NORTHWEST NATIONAL LABORATORY, 99354, Richland, UNITED STATES
| | - Xinyi Wei
- BASF Corp, Environmental Catalysis, Iselin, UNITED STATES
| | - Libor Kovarik
- Pacific Northwest National Laboratory Hanford Technical Library: Pacific Northwest National Laboratory, PNNL, UNITED STATES
| | - Nicholas R Jaegers
- Pacific Northwest National Laboratory Hanford Technical Library: Pacific Northwest National Laboratory, PNNL, UNITED STATES
| | - Eric D Walter
- Pacific Northwest National Laboratory Hanford Technical Library: Pacific Northwest National Laboratory, PNNL, UNITED STATES
| | | | - Yong Wang
- Washington State University, Chemical Engineering, UNITED STATES
| | - Janos Szanyi
- Pacific Northwest National Laboratory, INSTITUTE FOR INTEGRATED CATALYSIS, 3335 Innovation blvd, EMSL BUILDING, PACIFIC NORTHWEST NATIONAL LABORATORY, Richland, 99354, Richland, UNITED STATES
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30
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Methane combustion over palladium catalyst within the confined space of MFI zeolite. CHINESE JOURNAL OF CATALYSIS 2021. [DOI: 10.1016/s1872-2067(20)63775-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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31
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Cui Y, Zhu Chen J, Peng B, Kovarik L, Devaraj A, Li Z, Ma T, Wang Y, Szanyi J, Miller JT, Wang Y, Gao F. Onset of High Methane Combustion Rates over Supported Palladium Catalysts: From Isolated Pd Cations to PdO Nanoparticles. JACS AU 2021; 1:396-408. [PMID: 34467303 PMCID: PMC8395651 DOI: 10.1021/jacsau.0c00109] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Indexed: 06/13/2023]
Abstract
Industrial low-temperature methane combustion catalyst Pd/Al2O3 suffers from H2O-induced deactivation. It is imperative to design Pd catalysts free from this deactivation and with high atomic efficiency. Using a small-pore zeolite SSZ-13 as support, herein we report well-defined Pd catalysts with dominant active species as finely dispersed Pd cations, uniform PdO particles embedded inside the zeolite framework, or PdO particles decorating the zeolite external surface. Through detailed reaction kinetics and spectroscopic and microscopic studies, we show that finely dispersed sites are much less active than PdO nanoparticles. We further demonstrate that H2O-induced deactivation can be readily circumvented by using zeolite supports with high Si/Al ratios. Finally, we provide a few rational catalyst design suggestions for methane oxidation based on the new knowledge learned in this study.
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Affiliation(s)
- Yanran Cui
- Institute
for Integrated Catalysis, Pacific Northwest
National Laboratory, Richland, Washington 99354, United States
| | - Johnny Zhu Chen
- Davidson
School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Bo Peng
- Institute
for Integrated Catalysis, Pacific Northwest
National Laboratory, Richland, Washington 99354, United States
| | - Libor Kovarik
- Institute
for Integrated Catalysis, Pacific Northwest
National Laboratory, Richland, Washington 99354, United States
| | - Arun Devaraj
- Institute
for Integrated Catalysis, Pacific Northwest
National Laboratory, Richland, Washington 99354, United States
| | - Zhe Li
- Department
of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011, United States
| | - Tao Ma
- Department
of Energy, Ames Laboratory, Ames, Iowa 50011, United States
| | - Yilin Wang
- Institute
for Integrated Catalysis, Pacific Northwest
National Laboratory, Richland, Washington 99354, United States
| | - Janos Szanyi
- Institute
for Integrated Catalysis, Pacific Northwest
National Laboratory, Richland, Washington 99354, United States
| | - Jeffrey T. Miller
- Davidson
School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Yong Wang
- Institute
for Integrated Catalysis, Pacific Northwest
National Laboratory, Richland, Washington 99354, United States
- Voiland
School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Feng Gao
- Institute
for Integrated Catalysis, Pacific Northwest
National Laboratory, Richland, Washington 99354, United States
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32
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Mechanical pressure-mediated Pd active sites formation in NaY zeolite catalysts for indirect oxidative carbonylation of methanol to dimethyl carbonate. J Catal 2021. [DOI: 10.1016/j.jcat.2021.03.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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33
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Analysis of Ion-Exchanged ZSM-5, BEA, and SSZ-13 Zeolite Trapping Materials under Realistic Exhaust Conditions. Catalysts 2021. [DOI: 10.3390/catal11040449] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
An industry-defined evaluation protocol was used to evaluate the hydrocarbon trapping (HCT) and passive NOx adsorption (PNA) potential for BEA, ZSM-5, and SSZ-13 zeolites with ion-exchanged Pd or Ag. All materials underwent 700 °C degreening prior to exposure to an industry-derived protocol gas stream, which included NOx, ethylene, toluene, and decane as measured trapping species as well as common exhaust gasses CO, H2O, O2, CO2, and H2. Evaluation showed that BEA and ZSM-5 zeolites were effective at trapping hydrocarbons (HCs), as saturation was not achieved after 30 min of exposure. SSZ-13 also stored HCs but was only able to adsorb 20–25% compared to BEA and ZSM-5. The presence of Ag or Pd did not impact the overall HC uptake, particularly in the first three minutes. Pd/zeolites had significantly lower THC release temperature, and it aided in the conversion of the released HCs; Ag only had a moderate effect in both areas. With respect to NOx adsorption, the level of uptake was much lower than HCs on all samples, and Ag or Pd was necessary with Pd being notably more effective. Additionally, only Pd/ZSM-5 and Pd/SSZ-13 continue to store a portion of the NOx above 200 °C, which is critical for downstream selective catalytic NOx reduction (SCR). Hydrothermal aging (800 °C for 50 h) of a subset of the samples were performed: BEA, Pd/BEA, ZSM-5, Pd/ZSM-5, and Pd/SSZ-13. There was a minimal effect on the HC storage, ~10% reduction in capacity with no effect on release temperature; however, only Pd/SSZ-13 showed significant NOx storage after aging.
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34
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Liu C, Wang J, Chen Z, Wang J, Shen M. Improvement of NOx uptake/release over Pd/Beta by propylene: shielding effect of intermediates on adsorbed NOx species. Phys Chem Chem Phys 2021; 23:5261-5269. [PMID: 33630981 DOI: 10.1039/d0cp06075e] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Passive NOx adsorbers (PNAs) are capable of trapping NOx at low temperature and releasing the trapped NOx into the gas circuit at higher temperatures, where downstream NOx reduction catalysts are activated. Hydrocarbons have a significant effect on the performance of PNAs, nonetheless research in this area has been overlooked. Here the chemistry of NOx adsorption and desorption in the presence of C3H6 was studied. For different pore-size zeolites (BEA, MFI and CHA), the addition of C3H6 always increased the NOx adsorption capacity at a low temperature and raised the NOx desorption temperature. Spectroscopic and computational investigations were performed using the model Pd/Beta to unravel the relevant mechanism. Fourier transform infrared (FTIR) spectra indicated that more Pd+ was formed in the presence of C3H6, which contributed to higher NOx storage capacity. An intermediate Pd-NC3H6O was probed and its evolution procedure was modeled by density functional theory (DFT) calculations. The results showed that a shielding effect of Pd-NC3H6O on Pd+-NO improved the NOx desorption temperature. This investigation has important implications for how short-chain olefins and even more complex gas mixtures affect the NOx adsorption and desorption performance of Pd/zeolite.
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Affiliation(s)
- Chao Liu
- Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P. R. China.
| | - Jun Wang
- Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P. R. China.
| | - Zexiang Chen
- Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P. R. China.
| | - Jianqiang Wang
- Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P. R. China.
| | - Meiqing Shen
- Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P. R. China. and State Key Laboratory of Engines, Tianjin University, Tianjin 300072, P. R. China and Collaborative Innovation Centre of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China
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35
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Yasumura S, Ide H, Ueda T, Jing Y, Liu C, Kon K, Toyao T, Maeno Z, Shimizu KI. Transformation of Bulk Pd to Pd Cations in Small-Pore CHA Zeolites Facilitated by NO. JACS AU 2021; 1:201-211. [PMID: 34467284 PMCID: PMC8395613 DOI: 10.1021/jacsau.0c00112] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Indexed: 06/13/2023]
Abstract
Atomic dispersion of metal species has attracted attention as a unique phenomenon that affects adsorption properties and catalytic activities and that can be used to design so-called single atom materials. In this work, we describe atomic dispersion of bulk Pd into small pores of CHA zeolites. Under 4% NO flow at 600 °C, bulk Pd metal on the outside of CHA zeolites effectively disperses, affording Pd2+ cations on Al sites with concomitant formation of N2O, as revealed by microscopic and spectroscopic characterizations combined with mass spectroscopy. In the present method, even commercially available submicrosized Pd black can be used as a Pd source, and importantly, 4.1 wt % of atomic Pd2+ cations, which is the highest loading amount reported so far, can be introduced into CHA zeolites. The structural evolution of bulk Pd metal is also investigated by in situ X-ray absorption spectroscopy (XAS) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), as well as ab initio thermodynamic analysis using density functional theory (DFT) calculations.
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Affiliation(s)
- Shunsaku Yasumura
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Hajime Ide
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Taihei Ueda
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Yuan Jing
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Chong Liu
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Kenichi Kon
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Takashi Toyao
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
- Elements
Strategy Initiative for Catalysts and Batteries, Kyoto University, Katsura, Kyoto 615-8520, Japan
| | - Zen Maeno
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Ken-ichi Shimizu
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
- Elements
Strategy Initiative for Catalysts and Batteries, Kyoto University, Katsura, Kyoto 615-8520, Japan
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36
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Van der Mynsbrugge J, Head-Gordon M, Bell AT. Computational Modeling Predicts the Stability of Both Pd + and Pd 2+ Ion-Exchanged into H-CHA. JOURNAL OF MATERIALS CHEMISTRY. A 2021; 9:2161-2174. [PMID: 33686355 PMCID: PMC7936627 DOI: 10.1039/d0ta11254b] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Passive NOx adsorbers (PNA) using Pd/zeolites have emerged as a promising solution for the reduction of cold-start emissions from vehicle exhaust. However, the nature of the active sites and the mechanisms underlying NOx adsorption in Pd/zeolites remain a subject of ongoing investigation. In this study, we employ quantum chemical simulations to investigate the structure of Pd species in cation-exchange sites at isolated Al and Al pairs in the 6-ring and 8-ring of the CHA framework, before the introduction of NOx. Our calculations show that the speciation of Pd in these exchange sites strongly depends on the precise Al arrangement within the framework, as well as the operating conditions. Ionically dispersed Pd is found to be the most favorable species over a wide range of oxidizing and reducing conditions. Small oligomers of PdO and metallic Pd do not appear to be competitive at either isolated Al or Al pairs. Notably, our calculations show that ion exchange sites other than next-next-nearest neighbor Al pairs in the 6-ring will be preferentially occupied by Pd+ instead of Pd2+. The stability of Pd+ in the zeolite environment is an interesting contrast with its rareness in molecular Pd compounds. Nonetheless, a detailed analysis of the electronic structure shows that predicted Pd oxidation states are consistent with chemical intuition for all complexes investigated in this study. We also discuss the potential ambiguity in Pd characterization provided by typical experimental techniques such as XANES, EXAFS and UV-VIS, and highlight the need for additional EPR spectroscopy studies to further elucidate the initial Pd speciation in zeolites for PNA applications.
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Affiliation(s)
- Jeroen Van der Mynsbrugge
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
| | - Martin Head-Gordon
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Alexis T. Bell
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
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37
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Khivantsev K, Vargas CG, Tian J, Kovarik L, Jaegers NR, Szanyi J, Wang Y. Economizing on Precious Metals in Three-Way Catalysts: Thermally Stable and Highly Active Single-Atom Rhodium on Ceria for NO Abatement under Dry and Industrially Relevant Conditions*. Angew Chem Int Ed Engl 2021; 60:391-398. [PMID: 32881353 DOI: 10.1002/anie.202010815] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Indexed: 01/16/2023]
Abstract
We show for the first time that atomically dispersed Rh cations on ceria, prepared by a high-temperature atom-trapping synthesis, are the active species for the (CO+NO) reaction. This provides a direct link with the organometallic homogeneous RhI complexes capable of catalyzing the dry (CO+NO) reaction. The thermally stable Rh cations in 0.1 wt % Rh1 /CeO2 achieve full NO conversion with a turn-over-frequency (TOF) of around 330 h-1 per Rh atom at 120 °C. Under dry conditions, the main product above 100 °C is N2 with N2 O being the minor product. The presence of water promotes low-temperature activity of 0.1 wt % Rh1 /CeO2 . In the wet stream, ammonia and nitrogen are the main products above 120 °C. The uniformity of Rh ions on the support, allows us to detect the intermediates of (CO+NO) reaction via IR measurements on Rh cations on zeolite and ceria. We also show that NH3 formation correlates with the water gas shift (WGS) activity of the material and detect the formation of Rh hydride species spectroscopically.
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Affiliation(s)
- Konstantin Khivantsev
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Carlos Garcia Vargas
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA, 99352, USA.,Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, 99163, USA
| | - Jinshu Tian
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Libor Kovarik
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Nicholas R Jaegers
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA, 99352, USA.,Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, 99163, USA
| | - Janos Szanyi
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Yong Wang
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA, 99352, USA.,Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA, 99163, USA
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38
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Elgayyar T, Schnee J, Tuel A, Burel L, Bosselet F, Schuurman Y, Meunier FC, Delannoy L, Thomas C. Au-Modified Pd catalyst exhibits improved activity and stability for NO direct decomposition. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00301a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The promotion of a Pd catalyst with Au leads to higher and stable activity for the direct decomposition of NO, due to improved oxygen desorption.
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Affiliation(s)
- Taha Elgayyar
- Univ Lyon
- CNRS
- Université Claude Bernard Lyon
- IRCELYON
- 69626 Villeurbanne
| | - Josefine Schnee
- CNRS
- Laboratoire de Réactivité de Surface (LRS)
- Sorbonne Université
- F-75005 Paris
- France
| | - Alain Tuel
- Univ Lyon
- CNRS
- Université Claude Bernard Lyon
- IRCELYON
- 69626 Villeurbanne
| | - Laurence Burel
- Univ Lyon
- CNRS
- Université Claude Bernard Lyon
- IRCELYON
- 69626 Villeurbanne
| | | | - Yves Schuurman
- Univ Lyon
- CNRS
- Université Claude Bernard Lyon
- IRCELYON
- 69626 Villeurbanne
| | | | - Laurent Delannoy
- CNRS
- Laboratoire de Réactivité de Surface (LRS)
- Sorbonne Université
- F-75005 Paris
- France
| | - Cyril Thomas
- CNRS
- Laboratoire de Réactivité de Surface (LRS)
- Sorbonne Université
- F-75005 Paris
- France
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39
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Zhao H, Hill AJ, Ma L, Bhat A, Jing G, Schwank JW. Progress and future challenges in passive NO adsorption over Pd/zeolite catalysts. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01084k] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Proposed NO adsorption cycles over Pd/zeolite materials.
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Affiliation(s)
- Huawang Zhao
- Department of Environmental Science & Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, China
| | - Alexander J. Hill
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Lei Ma
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Adarsh Bhat
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Guohua Jing
- Department of Environmental Science & Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, China
| | - Johannes W. Schwank
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
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40
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Castoldi L, Matarrese R, Morandi S, Ticali P, Lietti L. Low-temperature Pd/FER NOx adsorbers: Operando FT-IR spectroscopy and performance analysis. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.02.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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41
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Gu Y, Marino S, Cortés-Reyes M, Pieta IS, Pihl JA, Epling WS. Integration of an Oxidation Catalyst with Pd/Zeolite-Based Passive NOx Adsorbers: Impacts on Degradation Resistance and Desorption Characteristics. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c05186] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Yuntao Gu
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22903, United States
| | - Silvia Marino
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22903, United States
| | - Marina Cortés-Reyes
- Department of Chemical Engineering, Faculty of Sciences, University of Málaga, Campus de Teatinos, Málaga E-29071, Spain
| | - Izabela S. Pieta
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Josh A. Pihl
- Energy Science and Technology Directorate, Oak Ridge National Laboratory, Knoxville, Tennessee 37932, United States
| | - William S. Epling
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22903, United States
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42
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Zhang T, Chen Z, Walsh AG, Li Y, Zhang P. Single-Atom Catalysts Supported by Crystalline Porous Materials: Views from the Inside. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2002910. [PMID: 32656812 DOI: 10.1002/adma.202002910] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/24/2020] [Indexed: 06/11/2023]
Abstract
Single-atom catalysts (SACs) have recently emerged as an exciting system in heterogeneous catalysis showing outstanding performance in many catalytic reactions. Single-atom catalytic sites alone are not stable and thus require stabilization from substrates. Crystalline porous materials such as zeolites and metal-organic frameworks (MOFs) are excellent substrates for SACs, offering high stability with the potential to further enhance their performance due to synergistic effects. This review features recent work on the structure, electronic, and catalytic properties of zeolite and MOF-protected SACs, offering atomic-scale views from the "inside" thanks to the subatomic resolution of synchrotron X-ray absorption spectroscopy (XAS). The extended X-ray absorption fine structure and associated methods will be shown to be powerful tools in identifying the single-atom site and can provide details into the coordination environment and bonding disorder of SACs. The X-ray absorption near-edge structure will be demonstrated as a valuable method in probing the electronic properties of SACs by analyzing the white line intensity, absorption edge shift, and pre-/postedge features. Emphasis is also placed on in situ/operando XAS using state-of-the-art equipment, which can unveil the changes in structure and properties of SACs during the dynamic catalytic processes in a highly sensitive and time-resolved manner.
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Affiliation(s)
- Tianjun Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
| | - Ziyi Chen
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada
| | - Andrew G Walsh
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada
| | - Yi Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
- International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
| | - Peng Zhang
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada
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43
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Khivantsev K, Vargas CG, Tian J, Kovarik L, Jaegers NR, Szanyi J, Wang Y. Economizing on Precious Metals in Three‐Way Catalysts: Thermally Stable and Highly Active Single‐Atom Rhodium on Ceria for NO Abatement under Dry and Industrially Relevant Conditions**. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010815] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Konstantin Khivantsev
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Carlos Garcia Vargas
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
- Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman WA 99163 USA
| | - Jinshu Tian
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Libor Kovarik
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Nicholas R. Jaegers
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
- Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman WA 99163 USA
| | - Janos Szanyi
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Yong Wang
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
- Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman WA 99163 USA
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44
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Kaiser SK, Chen Z, Faust Akl D, Mitchell S, Pérez-Ramírez J. Single-Atom Catalysts across the Periodic Table. Chem Rev 2020; 120:11703-11809. [PMID: 33085890 DOI: 10.1021/acs.chemrev.0c00576] [Citation(s) in RCA: 329] [Impact Index Per Article: 82.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Isolated atoms featuring unique reactivity are at the heart of enzymatic and homogeneous catalysts. In contrast, although the concept has long existed, single-atom heterogeneous catalysts (SACs) have only recently gained prominence. Host materials have similar functions to ligands in homogeneous catalysts, determining the stability, local environment, and electronic properties of isolated atoms and thus providing a platform for tailoring heterogeneous catalysts for targeted applications. Within just a decade, we have witnessed many examples of SACs both disrupting diverse fields of heterogeneous catalysis with their distinctive reactivity and substantially enriching our understanding of molecular processes on surfaces. To date, the term SAC mostly refers to late transition metal-based systems, but numerous examples exist in which isolated atoms of other elements play key catalytic roles. This review provides a compositional encyclopedia of SACs, celebrating the 10th anniversary of the introduction of this term. By defining single-atom catalysis in the broadest sense, we explore the full elemental diversity, joining different areas across the whole periodic table, and discussing historical milestones and recent developments. In particular, we examine the coordination structures and associated properties accessed through distinct single-atom-host combinations and relate them to their main applications in thermo-, electro-, and photocatalysis, revealing trends in element-specific evolution, host design, and uses. Finally, we highlight frontiers in the field, including multimetallic SACs, atom proximity control, and possible applications for multistep and cascade reactions, identifying challenges, and propose directions for future development in this flourishing field.
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Affiliation(s)
- Selina K Kaiser
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Zupeng Chen
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Dario Faust Akl
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Sharon Mitchell
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Javier Pérez-Ramírez
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
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45
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Recent advances in catalytic automotive emission control: Passive
NO
storage at low temperatures. J CHIN CHEM SOC-TAIP 2020. [DOI: 10.1002/jccs.202000203] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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46
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Qin R, Liu K, Wu Q, Zheng N. Surface Coordination Chemistry of Atomically Dispersed Metal Catalysts. Chem Rev 2020; 120:11810-11899. [DOI: 10.1021/acs.chemrev.0c00094] [Citation(s) in RCA: 171] [Impact Index Per Article: 42.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ruixuan Qin
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and National & Local Joint Engineering Research Center for Preparation Technology of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Kunlong Liu
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and National & Local Joint Engineering Research Center for Preparation Technology of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Qingyuan Wu
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and National & Local Joint Engineering Research Center for Preparation Technology of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Nanfeng Zheng
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and National & Local Joint Engineering Research Center for Preparation Technology of Nanomaterials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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47
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Chen Z, Guo L, Qu H, Liu L, Xie H, Zhong Q. Controllable positions of Cu2+ to enhance low-temperature SCR activity on novel Cu-Ce-La-SSZ-13 by a simple one-pot method. Chem Commun (Camb) 2020; 56:2360-2363. [DOI: 10.1039/c9cc09734a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Regulation of Cu2+ ions to migrate to more active SCR reaction sites can efficiently improve low-temperature SCR activity.
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Affiliation(s)
- Zhiqiang Chen
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- China
| | - Lei Guo
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- China
| | - Hongxia Qu
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- China
| | - Li Liu
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- China
| | - Huifang Xie
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- China
| | - Qin Zhong
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- China
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48
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Malamis SA, Harold MP, Epling WS. Coupled NO and C3H6 Trapping, Release and Conversion on Pd/BEA: Evaluation of the Lean Hydrocarbon NOx Trap. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b04919] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sotirios A. Malamis
- Department of Chemical and Biomolecular Engineering, Texas Center for Clean Engines, Emissions & Fuels, University of Houston, Houston, Texas 77204, Unites States
| | - Michael P. Harold
- Department of Chemical and Biomolecular Engineering, Texas Center for Clean Engines, Emissions & Fuels, University of Houston, Houston, Texas 77204, Unites States
| | - William S. Epling
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22904, Unites States
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49
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Wu S, Yang X, Janiak C. Confinement Effects in Zeolite‐Confined Noble Metals. Angew Chem Int Ed Engl 2019; 58:12340-12354. [DOI: 10.1002/anie.201900013] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Indexed: 01/02/2023]
Affiliation(s)
- Si‐Ming Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology (WHUT) Wuhan 430070 China
| | - Xiao‐Yu Yang
- State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology (WHUT) Wuhan 430070 China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)(SMSEGL) & School of Chemical Engineering and TechnologySun Yat-sen University (SYSU) Zhuhai 519082 China
- School of Engineering and Applied SciencesHarvard University (HU) Cambridge MA 02138 USA
| | - Christoph Janiak
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
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50
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Jaegers NR, Lai J, He Y, Walter E, Dixon DA, Vasiliu M, Chen Y, Wang C, Hu MY, Mueller KT, Wachs IE, Wang Y, Hu JZ. Mechanism by which Tungsten Oxide Promotes the Activity of Supported V
2
O
5
/TiO
2
Catalysts for NO
X
Abatement: Structural Effects Revealed by
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V MAS NMR Spectroscopy. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904503] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Nicholas R. Jaegers
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
- Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman WA 99163 USA
| | - Jun‐Kun Lai
- OperandoMolecular Spectroscopy & Catalysis Laboratory Lehigh University Bethlehem PA 18015 USA
| | - Yang He
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - Eric Walter
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - David A. Dixon
- Department of Chemistry The University of Alabama Tuscaloosa AL 35487 USA
| | - Monica Vasiliu
- Department of Chemistry The University of Alabama Tuscaloosa AL 35487 USA
| | - Ying Chen
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - Chongmin Wang
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - Mary Y. Hu
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - Karl T. Mueller
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - Israel E. Wachs
- OperandoMolecular Spectroscopy & Catalysis Laboratory Lehigh University Bethlehem PA 18015 USA
| | - Yong Wang
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
- Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman WA 99163 USA
| | - Jian Zhi Hu
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
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