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Huang J, Klahn M, Tian X, Bartling S, Zimina A, Radtke M, Rockstroh N, Naliwajko P, Steinfeldt N, Peppel T, Grunwaldt JD, Logsdail AJ, Jiao H, Strunk J. Fundamental Structural and Electronic Understanding of Palladium Catalysts on Nitride and Oxide Supports. Angew Chem Int Ed Engl 2024; 63:e202400174. [PMID: 38466808 DOI: 10.1002/anie.202400174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 02/16/2024] [Accepted: 02/22/2024] [Indexed: 03/13/2024]
Abstract
The nature of the support can fundamentally affect the function of a heterogeneous catalyst. For the novel type of isolated metal atom catalysts, sometimes referred to as single-atom catalysts, systematic correlations are still rare. Here, we report a general finding that Pd on nitride supports (non-metal and metal nitride) features a higher oxidation state compared to that on oxide supports (non-metal and metal oxide). Through thorough oxidation state investigations by X-ray absorption spectroscopy (XAS), X-ray photoelectron spectroscopy (XPS), CO-DRIFTS, and density functional theory (DFT) coupled with Bader charge analysis, it is found that Pd atoms prefer to interact with surface hydroxyl group to form a Pd(OH)x species on oxide supports, while on nitride supports, Pd atoms incorporate into the surface structure in the form of Pd-N bonds. Moreover, a correlation was built between the formal oxidation state and computational Bader charge, based on the periodic trend in electronegativity.
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Affiliation(s)
- Junhao Huang
- Leibniz Institute for Catalysis e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Marcus Klahn
- Leibniz Institute for Catalysis e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Xinxin Tian
- Institute of Molecular Science, Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Key Laboratory of Chemical Biology and Molecular Engineering of Education Ministry, Shanxi University, Taiyuan, 030006, China
| | - Stephan Bartling
- Leibniz Institute for Catalysis e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Anna Zimina
- Institute of Catalysis Research and Technology and Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Martin Radtke
- Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Str. 11, 12489, Berlin, Germany
| | - Nils Rockstroh
- Leibniz Institute for Catalysis e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Pawel Naliwajko
- Leibniz Institute for Catalysis e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Norbert Steinfeldt
- Leibniz Institute for Catalysis e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Tim Peppel
- Leibniz Institute for Catalysis e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Jan-Dierk Grunwaldt
- Institute of Catalysis Research and Technology and Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Andrew J Logsdail
- Max Planck-Cardiff Centre on the Fundamentals of Heterogeneous Catalysis (FUNCAT), Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, CF10 3AT, United Kingdom
| | - Haijun Jiao
- Leibniz Institute for Catalysis e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Jennifer Strunk
- Leibniz Institute for Catalysis e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
- Industrial Chemistry and Heterogeneous Catalysis, Technical University of Munich, Lichtenbergstrße 4, 85748, Garching, Germany
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2
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Zhang F, Zhang H, Jia Z, Chen S, Li S, Li J, Zan WY, Wang Q, Li Y. Nickel Single Atom Density-Dependent CO 2 Efficient Electroreduction. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2308080. [PMID: 38032165 DOI: 10.1002/smll.202308080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 11/07/2023] [Indexed: 12/01/2023]
Abstract
The transition metal-nitrogen-carbon (M─N─C) with MNx sites has shown great potential in CO2 electroreduction (CO2RR) for producing high value-added C1 products. However, a comprehensive and profound understanding of the intrinsic relationship between the density of metal single atoms and the CO2RR performance is still lacking. Herein, a series of Ni single-atom catalysts is deliberately designed and prepared, anchored on layered N-doped graphene-like carbon (x Ni1@NG-900, where x represents the Ni loading, 900 refers to the temperature). By modulating the precursor, the density of Ni single atoms (DNi) can be finely tuned from 0.01 to 1.19 atoms nm-2. The CO2RR results demonstrate that the CO faradaic efficiency (FECO) predominantly increases from 13.4% to 96.2% as the DNi increased from 0 to 0.068 atoms nm-2. Then the FECO showed a slow increase from 96.2% to 98.2% at -0.82 V versus reversible hydrogen electrode (RHE) when DNi increased from 0.068 to 1.19 atoms nm-2. The theoretical calculations are in good agreement with experimental results, indicating a trade-off relationship between DNi and CO2RR performance. These findings reveal the crucial role of the density of Ni single atoms in determining the CO2RR performance of M─N─C catalysts.
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Affiliation(s)
- Fengwei Zhang
- Institute of Crystalline Materials, Institute of Molecular Science, Key Lab of Materials for Energy Conversion and Storage of Shanxi Province, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, P. R. China
| | - Han Zhang
- Institute of Crystalline Materials, Institute of Molecular Science, Key Lab of Materials for Energy Conversion and Storage of Shanxi Province, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, P. R. China
| | - Zhenhe Jia
- Department of Power Engineering, School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding, 071003, P. R. China
| | - Shuai Chen
- National Key Laboratory of High Efficiency and Low Carbon Utilization of Coal, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China
| | - Siming Li
- Institute of Crystalline Materials, Institute of Molecular Science, Key Lab of Materials for Energy Conversion and Storage of Shanxi Province, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, P. R. China
| | - Jijie Li
- Institute of Crystalline Materials, Institute of Molecular Science, Key Lab of Materials for Energy Conversion and Storage of Shanxi Province, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, P. R. China
| | - Wen-Yan Zan
- Institute of Crystalline Materials, Institute of Molecular Science, Key Lab of Materials for Energy Conversion and Storage of Shanxi Province, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, P. R. China
| | - Qiang Wang
- National Key Laboratory of High Efficiency and Low Carbon Utilization of Coal, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China
| | - Yawei Li
- Institute of Crystalline Materials, Institute of Molecular Science, Key Lab of Materials for Energy Conversion and Storage of Shanxi Province, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, P. R. China
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3
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Han X, Zhang L, Zhang R, Wang K, Wang X, Li B, Tao Z, Song S, Zhang H. Boosting the catalytic performance of Al 2O 3-supported Pd catalysts by introducing CeO 2 promoters. Dalton Trans 2024. [PMID: 38258661 DOI: 10.1039/d3dt03676f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Maintaining the stability of noble metals is the key to the long-term stability of supported catalysts. In response to the instability of noble metal species at high temperatures, we developed a synergistic strategy of dual oxide supports. By designing and constructing ceria components with small sizes, we have achieved unity in the ability of catalytic materials to supply oxygen and stabilize metal species. In this study, we prepared Al2O3-CeO2-Pd (AlCePd) catalysts containing trace amounts of Ce through the hydrolysis of cerium acetate, which achieved 100% CO conversion at 160 °C. More importantly, the activity remained at its initial 100% in the long-term durability testing, demonstrating the high stability of AlCePd. In contrast, the CO conversion of the CeO2-Pd (CePd) catalyst decreased from 100% to 54% within 3 h. Through comprehensive studies, we found that this excellent catalytic performance stems from the stabilizing effect of an alumina support and the possible reverse oxygen spillover effect of small-sized ceria components, where small-sized ceria components provide active oxygen for independent Pd species, making it possible for the CO adsorbed on Pd to react with this oxygen species.
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Affiliation(s)
- Xiaoxiao Han
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
- University of Science and Technology of China, Hefei 230026, China
| | - Lingling Zhang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
- University of Science and Technology of China, Hefei 230026, China
| | - Rui Zhang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
- University of Science and Technology of China, Hefei 230026, China
| | - Ke Wang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
- University of Science and Technology of China, Hefei 230026, China
| | - Xiao Wang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
- University of Science and Technology of China, Hefei 230026, China
| | - Bo Li
- Sinopec Research Institute of Petroleum Processing Co., Ltd., Beijing 100083, PR China.
| | - Zhiping Tao
- Sinopec Research Institute of Petroleum Processing Co., Ltd., Beijing 100083, PR China.
| | - Shuyan Song
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
- University of Science and Technology of China, Hefei 230026, China
| | - Hongjie Zhang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
- University of Science and Technology of China, Hefei 230026, China
- Department of Chemistry, Tsinghua University, Beijing 100084, China
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4
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Zhang WX, Li Y, Ke D, Gao YR, Fei T, Wang GQ, Shu Y, Wang JH. GSH-depleting metal-polyphenol-network nanoparticles with dual enzyme activities induce enhanced ferroptosis. Biomater Sci 2023; 11:6906-6918. [PMID: 37655451 DOI: 10.1039/d3bm01000g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Ferroptosis is a non-apoptotic form of regulated cell death. The efficiency of ferroptosis is restrained in the tumor microenvironment (TME) by overexpression of glutathione (GSH) and insufficient production of hydrogen peroxide (H2O2). In this work, theranostic nanoparticles Ce-aMOFs@Fe3+-EGCG, termed MEFs, are developed by coating uniform Ce-based amorphous metal-organic frameworks (Ce-aMOFs) with epigallocatechin gallate (EGCG) and Fe3+. Fe3+ is chelated by the adjacent phenol hydroxyl groups in EGCG. In the tumor cell interior, overexpressed GSH and weak acidic medium degrade the coating to release Fe3+ and EGCG accompanied by exposure of Ce-aMOFs. Fe3+ and EGCG consume GSH along with turning Fe3+ into Fe2+. Ce-aMOFs act as a nanozyme possessing dual-enzymatic activities, i.e. superoxide dismutase (SOD)- and phosphatase-like activities. In the TME, Ce-aMOFs catalyze the conversion of endogenous superoxide (O2˙-) into H2O2, and Fe2+ catalyzes H2O2 to generate toxic hydroxyl radicals (˙OH), which may further induce tumor cell death through ferroptosis. In addition, the phosphatase-like activity of Ce-aMOFs may sustainably dephosphorylate NADPH and effectively inhibit intracellular biosynthesis of GSH. Therefore, MEFs ensure down-regulation of intracellular GSH levels and up-regulation of oxidative pressure, which enhance the ferroptosis effect.
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Affiliation(s)
- Wen-Xin Zhang
- Department of Chemistry, College of Sciences, Northeastern University, Box 332, Shenyang 110819, China.
| | - You Li
- College of Life and Health Sciences, Northeastern University, Shenyang 110819, China
| | - Di Ke
- Department of Chemistry, College of Sciences, Northeastern University, Box 332, Shenyang 110819, China.
| | - Yi-Ru Gao
- Department of Chemistry, College of Sciences, Northeastern University, Box 332, Shenyang 110819, China.
| | - Teng Fei
- College of Life and Health Sciences, Northeastern University, Shenyang 110819, China
| | - Guo-Qing Wang
- College of Life and Health Sciences, Northeastern University, Shenyang 110819, China
| | - Yang Shu
- Department of Chemistry, College of Sciences, Northeastern University, Box 332, Shenyang 110819, China.
| | - Jian-Hua Wang
- Department of Chemistry, College of Sciences, Northeastern University, Box 332, Shenyang 110819, China.
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5
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Muravev V, Parastaev A, van den Bosch Y, Ligt B, Claes N, Bals S, Kosinov N, Hensen EJM. Size of cerium dioxide support nanocrystals dictates reactivity of highly dispersed palladium catalysts. Science 2023; 380:1174-1179. [PMID: 37319196 DOI: 10.1126/science.adf9082] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Accepted: 05/15/2023] [Indexed: 06/17/2023]
Abstract
The catalytic performance of heterogeneous catalysts can be tuned by modulation of the size and structure of supported transition metals, which are typically regarded as the active sites. In single-atom metal catalysts, the support itself can strongly affect the catalytic properties. Here, we demonstrate that the size of cerium dioxide (CeO2) support governs the reactivity of atomically dispersed palladium (Pd) in carbon monoxide (CO) oxidation. Catalysts with small CeO2 nanocrystals (~4 nanometers) exhibit unusually high activity in a CO-rich reaction feed, whereas catalysts with medium-size CeO2 (~8 nanometers) are preferred for lean conditions. Detailed spectroscopic investigations reveal support size-dependent redox properties of the Pd-CeO2 interface.
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Affiliation(s)
- Valery Muravev
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, Netherlands
| | - Alexander Parastaev
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, Netherlands
| | - Yannis van den Bosch
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, Netherlands
| | - Bianca Ligt
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, Netherlands
| | - Nathalie Claes
- Electron Microscopy for Materials Science (EMAT), University of Antwerp, 2020 Antwerp, Belgium
| | - Sara Bals
- Electron Microscopy for Materials Science (EMAT), University of Antwerp, 2020 Antwerp, Belgium
| | - Nikolay Kosinov
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, Netherlands
| | - Emiel J M Hensen
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, Netherlands
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6
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Lv S, Wang H, Zhou Y, Tang D, Bi S. Recent advances in heterogeneous single-atom nanomaterials: From engineered metal-support interaction to applications in sensors. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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7
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Facile fabrication of atomically dispersed Ru-P-Ru ensembles for efficient hydrogenations beyond isolated single atoms. CHINESE JOURNAL OF CATALYSIS 2023. [DOI: 10.1016/s1872-2067(22)64172-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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8
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Effect of Pd precursors on the catalytic properties of Pd/CeO2 catalysts for CH4 and CO oxidation. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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9
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Facet-dependent electronic state of Pt single atoms anchoring on CeO2 nanocrystal for CO (preferential) oxidation. J Catal 2022. [DOI: 10.1016/j.jcat.2022.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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10
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Wang Y, Wang M. Recent progresses on single-atom catalysts for the removal of air pollutants. Front Chem 2022; 10:1039874. [DOI: 10.3389/fchem.2022.1039874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 10/10/2022] [Indexed: 11/13/2022] Open
Abstract
The booming industrialization has aggravated emission of air pollutants, inflicting serious harm on environment and human health. Supported noble-metals are one of the most popular catalysts for the oxidation removal of air pollutants. Unfortunately, the high price and large consumption restrict their development and practical application. Single-atom catalysts (SACs) emerge and offer an optimizing approach to address this issue. Due to maximal atom utilization, tunable coordination and electron environment and strong metal-support interaction, SACs have shown remarkable catalytic performance on many reactions. Over the last decade, great potential of SACs has been witnessed in the elimination of air pollutants. In this review, we first briefly summarize the synthesis methods and modulation strategies together with the characterization techniques of SACs. Next, we highlight the application of SACs in the abatement of air pollutants including CO, volatile organic compounds (VOCs) and NOx, unveiling the related catalytic mechanism of SACs. Finally, we propose the remaining challenges and future perspectives of SACs in fundamental research and practical application in the field of air pollutant removal.
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11
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García-Vargas CE, Collinge G, Yun D, Lee MS, Muravev V, Su YQ, Pereira-Hernández XI, Jiang D, Glezakou VA, Hensen EJM, Rousseau R, Datye AK, Wang Y. Activation of Lattice and Adatom Oxygen by Highly Stable Ceria-Supported Cu Single Atoms. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Carlos E. García-Vargas
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington99164, United States
- Environmental Molecular Sciences Laboratory, Richland, Washington99354, United States
| | - Gregory Collinge
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington99354, United States
| | - Dongmin Yun
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington99164, United States
| | - Mal-Soon Lee
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington99354, United States
| | - Valery Muravev
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MBEindhoven, The Netherlands
| | - Ya-Qiong Su
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MBEindhoven, The Netherlands
| | - Xavier Isidro Pereira-Hernández
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington99164, United States
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington99354, United States
| | - Dong Jiang
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington99164, United States
| | - Vassiliki-Alexandra Glezakou
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington99354, United States
| | - Emiel J. M. Hensen
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MBEindhoven, The Netherlands
| | - Roger Rousseau
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington99354, United States
| | - Abhaya K. Datye
- Department of Chemical and Biological Engineering and Center for Micro-engineered Materials, University of New Mexico, Albuquerque, New Mexico87131, United States
| | - Yong Wang
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington99164, United States
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington99354, United States
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12
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Building up libraries and production line for single atom catalysts with precursor-atomization strategy. Nat Commun 2022; 13:5721. [PMID: 36175505 PMCID: PMC9522824 DOI: 10.1038/s41467-022-33442-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 09/19/2022] [Indexed: 11/09/2022] Open
Abstract
Having the excellent catalytic performance, single atom catalysts (SACs) arouse extensive research interest. However, the application of SACs is hindered by the lack of versatile and scalable preparation approaches. Here, we show a precursor-atomization strategy to produce SACs, involving the spray of droplets of solutions containing metal precursors onto support surface through ultrasonic atomization and the subsequent calcination. This approach is versatile to successful synthesis of a series of catalysts, including 19 SACs with different metal sites and supports and 3 derivatives of SACs (single atom alloys, double atom catalysts and bi-metallic SACs). Furthermore, it can be scaled up by a homemade production line with productivity over 1 kg day-1, and the well-controlled catalyst uniformity is evidenced by the identical characterization results and catalytic properties in Suzuki-Miyaura cross-coupling. This strategy lays a foundation for further investigation and may accelerate the trend from basic research to industrial applications of SACs.
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13
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A comparative DFT+U study of CO oxidation on Pd- and Zr-doped ceria. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2022.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Chen L, Wu XP, Gong XQ. Unique catalytic mechanisms of methanol dehydrogenation at Pd-doped ceria: A DFT+U study. J Chem Phys 2022; 156:134701. [PMID: 35395884 DOI: 10.1063/5.0085913] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Pd-doped ceria is highly active in promoting oxidative dehydrogenation (ODH) reactions and also a model single atom catalyst (SAC). By performing density functional theory calculations corrected by on-site Coulomb interactions, we systematically studied the physicochemical properties of the Pd-doped CeO2(111) surface and the catalytic methanol to formaldehyde reaction on the surface. Two different configurations were located for the Pd dopant, and the calculated results showed that doping of Pd will make the surface more active with lower oxygen vacancy formation energies than the pristine CeO2(111). Moreover, two different pathways for the dehydrogenation of CH3OH to HCHO on the Pd-doped CeO2(111) were determined, one of which is the conventional two-step process (stepwise pathway) with the O-H bond of CH3OH being broken first followed by the C-H bond cleavage, while the other is a novel one-step process (concerted pathway) involving the two H being dissociated from CH3OH simultaneously even with a lower energy barrier than the stepwise one. With electronic and structural analyses, we showed that the direct reduction of Pd4+ to Pd2+ through the transfer of two electrons can outperform the separated Ce4+ to Ce3+ processes with the help of configurational evolution at the Pd site, which is responsible for the existence of such one-step dehydrogenation process. This novel mechanism may provide an inspiration for constructing ceria-based SAC with unique ODH activities.
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Affiliation(s)
- Lu Chen
- Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People's Republic of China
| | - Xin-Ping Wu
- Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People's Republic of China
| | - Xue-Qing Gong
- Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People's Republic of China
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15
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Ma K, Liao W, Shi W, Xu F, Zhou Y, Tang C, Lu J, Shen W, Zhang Z. Ceria-supported Pd catalysts with different size regimes ranging from single atoms to nanoparticles for the oxidation of CO. J Catal 2022. [DOI: 10.1016/j.jcat.2022.01.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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