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Karimadom BR, Sermiagin A, Meyerstein D, Zidki T, Mizrahi A, Bar-Ziv R, Kornweitz H. Hydrogen adsorption on various transition metal (111) surfaces in water: a DFT forecast. Phys Chem Chem Phys 2024; 26:7647-7657. [PMID: 38369914 DOI: 10.1039/d3cp05884k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
The hydrogen adsorption and hydrogen evolution at the M(111), (M = Ag, Au Cu, Pt, Pd, Ni & Co) surfaces of various transition metals in aqueous suspensions were studied computationally using the DFT methods. The hydrogens are adsorbed dissociatively on all surfaces except on Ag(111) and Au(111) surfaces. The results are validated by reported experimental and computational studies. Hydrogen atoms have large mobility on M(111) surfaces due to the small energy barriers for diffusion on the surface. The hydrogen evolution via the Tafel mechanism is considered at different surface coverage ratios of hydrogen atoms and is used as a descriptor for the hydrogen adsorption capacity on M(111) surfaces. All calculations are performed without considering how the hydrogen atoms are formed on the surface. The hydrogen adsorption energies decrease with the increase in the surface coverage of hydrogen atoms. The surface coverage for the H2 evolution depends on each M(111) surface. Among the considered M(111) surfaces, Au(111) has the least hydrogen adsorption capacity and Ni, Co and Pd have the highest. Furthermore, experiments proving that after the H2 evolution reaction (HER) on Au0-NPs, and Ag0-NPs surfaces some reducing capacity remains on the M0-NPs is presented.
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Affiliation(s)
- Basil Raju Karimadom
- Chemical Sciences Department and The Radical Reactions Research Center, Ariel University, Ariel, Israel.
| | - Alina Sermiagin
- Chemical Sciences Department and The Radical Reactions Research Center, Ariel University, Ariel, Israel.
| | - Dan Meyerstein
- Chemical Sciences Department and The Radical Reactions Research Center, Ariel University, Ariel, Israel.
- Chemistry Department, Ben-Gurion University, Beer-Sheva, Israel
| | - Tomer Zidki
- Chemical Sciences Department and The Radical Reactions Research Center, Ariel University, Ariel, Israel.
| | - Amir Mizrahi
- Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
| | - Ronen Bar-Ziv
- Chemistry Department, Nuclear Research Centre Negev, Beer-Sheva, Israel
| | - Haya Kornweitz
- Chemical Sciences Department and The Radical Reactions Research Center, Ariel University, Ariel, Israel.
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2
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Wenzel S, Boden D, van Lent R, Motaee E, Prabhu MK, Achour H, Groot IMN. Spectroscopic investigation of a Co(0001) model catalyst during exposure to H 2 and CO at near-ambient pressures. Phys Chem Chem Phys 2023; 25:25094-25104. [PMID: 37498615 PMCID: PMC10528786 DOI: 10.1039/d3cp02739b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 07/13/2023] [Indexed: 07/28/2023]
Abstract
Cobalt catalysts, although already used industrially for Fischer-Tropsch synthesis, are prone to a number of deactivation mechanisms such as oxidation of the active phase, and the deposition of carbon and reaction products. We have performed near-ambient-pressure X-ray photoelectron spectroscopy on Co(0001) model catalysts during exposure to gases relevant to Fischer-Tropsch synthesis, i.e., CO and H2, at 0.25 mbar total pressure. At this pressure, CO seems to be more efficient at keeping the Co(0001) surface metallic than H2, which is the opposite behavior as reported in the literature for other pressure ranges. We offer an interpretation of these differences based on the preferred adsorption and dissociation sites of CO and H2 compared to the oxidizing agent water (present as impurity in the gas feed and one of the products of the reaction). Additionally, detailed carbon spectra measured at the HIPPIE beamline of MAX IV allow for the distinction of different adsorbed species: CO and COx species are present in correlation to the presence of oxygen on the surface. Carbidic carbon and graphitic carbon can both be removed by hydrogen, whereas adsorbed hydrocarbons possibly poison the surface.
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Affiliation(s)
- Sabine Wenzel
- Leiden Institute of Chemistry, Einsteinweg 55, 2333 CC Leiden, The Netherlands.
| | - Dajo Boden
- Leiden Institute of Chemistry, Einsteinweg 55, 2333 CC Leiden, The Netherlands.
| | - Richard van Lent
- Leiden Institute of Chemistry, Einsteinweg 55, 2333 CC Leiden, The Netherlands.
| | - Elahe Motaee
- Leiden Institute of Chemistry, Einsteinweg 55, 2333 CC Leiden, The Netherlands.
| | - Mahesh K Prabhu
- Leiden Institute of Chemistry, Einsteinweg 55, 2333 CC Leiden, The Netherlands.
| | - Hamed Achour
- Leiden Institute of Chemistry, Einsteinweg 55, 2333 CC Leiden, The Netherlands.
| | - Irene M N Groot
- Leiden Institute of Chemistry, Einsteinweg 55, 2333 CC Leiden, The Netherlands.
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3
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Jamaati M, Torkashvand M, Sarabadani Tafreshi S, de Leeuw NH. A Review of Theoretical Studies on Carbon Monoxide Hydrogenation via Fischer-Tropsch Synthesis over Transition Metals. Molecules 2023; 28:6525. [PMID: 37764301 PMCID: PMC10650776 DOI: 10.3390/molecules28186525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 08/20/2023] [Accepted: 08/30/2023] [Indexed: 09/29/2023] Open
Abstract
The increasing demand for clean fuels and sustainable products has attracted much interest in the development of active and selective catalysts for CO conversion to desirable products. This review maps the theoretical progress of the different facets of most commercial catalysts, including Co, Fe, Ni, Rh, and Ru. All relevant elementary steps involving CO dissociation and hydrogenation and their dependence on surface structure, surface coverage, temperature, and pressure are considered. The dominant Fischer-Tropsch synthesis mechanism is also explored, including the sensitivity to the structure of H-assisted CO dissociation and direct CO dissociation. Low-coordinated step sites are shown to enhance catalytic activity and suppress methane formation. The hydrogen adsorption and CO dissociation mechanisms are highly dependent on the surface coverage, in which hydrogen adsorption increases, and the CO insertion mechanism becomes more favorable at high coverages. It is revealed that the chain-growth probability and product selectivity are affected by the type of catalyst and its structure as well as the applied temperature and pressure.
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Affiliation(s)
- Maryam Jamaati
- Department of Physics, Iran University of Science and Technology, Narmak, Tehran 16846-13114, Iran
| | - Mostafa Torkashvand
- Department of Chemistry, Amirkabir University of Technology (Tehran Polytechnic), No. 350, Hafez Avenue, Tehran 15916-34311, Iran
| | - Saeedeh Sarabadani Tafreshi
- Department of Chemistry, Amirkabir University of Technology (Tehran Polytechnic), No. 350, Hafez Avenue, Tehran 15916-34311, Iran
- School of Chemistry, University of Leeds, Leeds LS2 9JT, UK
| | - Nora H. de Leeuw
- School of Chemistry, University of Leeds, Leeds LS2 9JT, UK
- Department of Earth Sciences, Utrecht University, 3584 CB Utrecht, The Netherlands
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4
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Rajan A, Pushkar AP, Dharmalingam BC, Varghese JJ. Iterative multiscale and multi-physics computations for operando catalyst nanostructure elucidation and kinetic modeling. iScience 2023; 26:107029. [PMID: 37360694 PMCID: PMC10285649 DOI: 10.1016/j.isci.2023.107029] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023] Open
Abstract
Modern heterogeneous catalysis has benefitted immensely from computational predictions of catalyst structure and its evolution under reaction conditions, first-principles mechanistic investigations, and detailed kinetic modeling, which are rungs on a multiscale workflow. Establishing connections across these rungs and integration with experiments have been challenging. Here, operando catalyst structure prediction techniques using density functional theory simulations and ab initio thermodynamics calculations, molecular dynamics, and machine learning techniques are presented. Surface structure characterization by computational spectroscopic and machine learning techniques is then discussed. Hierarchical approaches in kinetic parameter estimation involving semi-empirical, data-driven, and first-principles calculations and detailed kinetic modeling via mean-field microkinetic modeling and kinetic Monte Carlo simulations are discussed along with methods and the need for uncertainty quantification. With these as the background, this article proposes a bottom-up hierarchical and closed loop modeling framework incorporating consistency checks and iterative refinements at each level and across levels.
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Affiliation(s)
- Ajin Rajan
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India
| | - Anoop P. Pushkar
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India
| | - Balaji C. Dharmalingam
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India
| | - Jithin John Varghese
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India
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5
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Chen BW. Equilibrium and kinetic isotope effects in heterogeneous catalysis: A density functional theory perspective. CATAL COMMUN 2023. [DOI: 10.1016/j.catcom.2023.106654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023] Open
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6
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Vasiliades MA, Govender NS, Govender A, Crous R, Moodley D, Botha T, Efstathiou AM. The Effect of H 2 Pressure on the Carbon Path of Methanation Reaction on Co/γ-Al 2O 3: Transient Isotopic and Operando Methodology Studies. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michalis A. Vasiliades
- Department of Chemistry, Heterogeneous Catalysis Laboratory, University of Cyprus, University Campus,
P.O. Box 20537, Nicosia, CY2109, Cyprus
| | - Nilenindran S. Govender
- Research and Technology, Energy Operations and Technology, Sasol South Africa, 1 Klasie Havenga Street, Sasolburg1947, South Africa
| | - Ashriti Govender
- Research and Technology, Energy Operations and Technology, Sasol South Africa, 1 Klasie Havenga Street, Sasolburg1947, South Africa
| | - Renier Crous
- Research and Technology, Energy Operations and Technology, Sasol South Africa, 1 Klasie Havenga Street, Sasolburg1947, South Africa
| | - Denzil Moodley
- Research and Technology, Energy Operations and Technology, Sasol South Africa, 1 Klasie Havenga Street, Sasolburg1947, South Africa
| | - Thys Botha
- Research and Technology, Energy Operations and Technology, Sasol South Africa, 1 Klasie Havenga Street, Sasolburg1947, South Africa
| | - Angelos M. Efstathiou
- Department of Chemistry, Heterogeneous Catalysis Laboratory, University of Cyprus, University Campus,
P.O. Box 20537, Nicosia, CY2109, Cyprus
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7
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Extension of Inducing Effect of Support Coordination on Ni-based Ordered Alloys Catalyst for Selective Hydrogenation. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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CO adsorption on Co(0001) revisited: high-coverage CO superstructures on the close-packed surface of cobalt. J Catal 2022. [DOI: 10.1016/j.jcat.2022.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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10
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Fang Y, Yao Y, Yang H, Fan Y, Nomura N, Zhou W, Ni D, Li X, Jiang W, Qiu P, Luo W. Incorporating Cobalt Nanoparticles in Nitrogen-Doped Mesoporous Carbon Spheres through Composite Micelle Assembly for High-Performance Lithium-Sulfur Batteries. ACS APPLIED MATERIALS & INTERFACES 2021; 13:38604-38612. [PMID: 34369139 DOI: 10.1021/acsami.1c10227] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Lithium-sulfur (Li-S) batteries have exhibited tremendous potential among the various secondary batteries benefitting from their large energy density, low expense, and enhanced security. However, the commercial use for Li-S batteries is immensely limited by the insulation of S, noticeable volume expansion from S to Li2S2/Li2S, and the undesired shuttle effect of lithium polysulfides (LiPs). Herein, a composite sulfur host has been prepared by in situ incorporations of cobalt nanoparticles (NPs) into nitrogen-doped mesoporous carbon spheres (Co/N-PCSs) through the composite micelle assembly strategy. The resultant functional Co/N-PCSs not only possess uniform spherical morphology with large open mesopores, high surface area, and pore volume but also have small Co NPs homogeneously inlaid into the pore walls of carbon frameworks. Both the experimental and theoretical calculation results demonstrate that the formed cobalt NPs can efficiently accelerate the lithium-ion diffusion reaction and greatly entrap the soluble intermediate LiPs. Benefiting from the well-designed structure, the Co/N-PCSs@S cathode with a S loading of 73.82 wt % delivers superior electrochemical performance, including long cycling stability (60% for the residual capacity at 1 A g-1 within 300 cycles) and excellent rate performance (∼512 mAh g-1 at 6 A g-1). This design strategy of implanting metal NPs in mesoporous carbon can be inspiring in energy storage applications.
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Affiliation(s)
- Yuan Fang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Institute of Functional Materials, Donghua University, Shanghai 201620, China
| | - Yu Yao
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Haoyu Yang
- School of Chemistry and Physics, Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia
| | - Yuchi Fan
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Institute of Functional Materials, Donghua University, Shanghai 201620, China
| | - Naoyuki Nomura
- Department of Materials Processing, Graduate School of Engineering, Tohoku University, Sendai, Miyagi 980-8579, Japan
| | - Weiwei Zhou
- Department of Materials Processing, Graduate School of Engineering, Tohoku University, Sendai, Miyagi 980-8579, Japan
| | - Dewei Ni
- State Key Laboratory of High Performance Ceramics & Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
- Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
| | - Xiaopeng Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Institute of Functional Materials, Donghua University, Shanghai 201620, China
| | - Wan Jiang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Institute of Functional Materials, Donghua University, Shanghai 201620, China
| | - Pengpeng Qiu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Institute of Functional Materials, Donghua University, Shanghai 201620, China
| | - Wei Luo
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Institute of Functional Materials, Donghua University, Shanghai 201620, China
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11
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Boosting the Catalytic Performance of Co/Mg/La Catalyst for Ammonia Synthesis by Selecting a Pre-Treatment Method. Catalysts 2021. [DOI: 10.3390/catal11080941] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The influence of the calcination process on the physicochemical properties and catalytic behavior of the Co/Mg/La catalysts for ammonia synthesis has been investigated. The catalysts were prepared using the different thermal pre-treatment methods prior to the activation, i.e., drying and calcination, and the respective activities for ammonia synthesis were assessed. It was found out that changing from air calcination prior to activation to direct activation of the co-precipitated species led to the different catalytic performances. The most favorable catalytic performance was achieved with Co/Mg/La prepared by calcination in air. Detailed characterization methods, employing e.g., XRPD, H2-TPD, N2-TPD, CO2-TPD, SEM, and TEM, showed that the superior catalytic behavior of this catalyst was attributed to its strong basicity and favorable adsorption properties toward hydrogen and nitrogen.
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12
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Du Z, Gong Y, Zhao H, Zhang Y, Yi S, Gu L. Unveiling the Interface Structure of the Exsolved Co-Fe Alloy Nanoparticles from Double Perovskite and Its Application in Solid Oxide Fuel Cells. ACS APPLIED MATERIALS & INTERFACES 2021; 13:3287-3294. [PMID: 33400481 DOI: 10.1021/acsami.0c14686] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Exsolution of catalytic nanoparticles (NPs) from perovskites has arisen as a flexible method to develop high-performance functional materials with enhanced durability for energy conversion and catalytic synthesis applications. Here, we unravel the interface structure of the in situ exsolved alloy nanoparticles from the double perovskite substrate on the atomic scale. The results show that the Co-Fe alloy NPs exsolved topologically from the {100} facets terminations of the Sr2FeMo0.65Co0.35O6-δ (SFMC) double perovskite along ⟨100⟩ directions exhibiting the same orientation and identical crystal structure. The lattice planes of these two phases align and insert into each other at the interface, forming a smooth and continuous coherent connection. The presence of moiré patterns at the interface confirms the topological exsolution mechanism. The coherent interface can significantly reduce the interfacial energy and therefore stabilize the exsolved nanoparticles. Therefore, excellent and stable electrochemical performance of the NP-decorated SFMC perovskite is observed as the anode for solid oxide fuel cells. Our contribution promotes a fundamental understanding of the interface structure of the in situ exsolved alloy nanoparticles from perovskite substrate.
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Affiliation(s)
- Zhihong Du
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Beijing Municiple Key Lab for Advanced Energy Materials and Technologies, Beijing 100083, China
| | - Yue Gong
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Hailei Zhao
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Beijing Municiple Key Lab for Advanced Energy Materials and Technologies, Beijing 100083, China
| | - Yang Zhang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Sha Yi
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
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13
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Kim K, Kang DW, Choi Y, Kim W, Lee H, Lee JW. Improved H 2 utilization by Pd doping in cobalt catalysts for reductive amination of polypropylene glycol. RSC Adv 2020; 10:45159-45169. [PMID: 35516265 PMCID: PMC9058643 DOI: 10.1039/d0ra10033a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 12/11/2020] [Indexed: 11/21/2022] Open
Abstract
Cobalt based catalysts having enhanced H2 dissociation and desorption were synthesized by inserting a trace amount of palladium. These catalysts were used for the reductive amination of polypropylene glycol (PPG) to polyetheramine (PEA). The catalytic activity toward PEA was significantly increased by incorporating an extremely low content of palladium (around 0.01 wt%) into cobalt based catalysts. The Pd inserted cobalt catalysts promoted reduction of cobalt oxide to cobalt metal and inhibited formation of cobalt nitride in the reductive amination. The Pd inserted cobalt catalysts not only enhanced hydrogen dissociation but also accelerated hydrogen desorption by increasing the electron density of cobalt through interaction between cobalt and palladium. These play a critical role in reducing cobalt oxide or cobalt nitride to cobalt metal as an active site for the reductive amination. Thus, the Pd inserted cobalt catalysts provide improved catalytic performance toward PEA production by maintaining the cobalt metal state. Addition of Pd into Co helped remarkably to reduce cobalt oxide and nitride to cobalt metal by enhanced hydrogen dissociation and desorption.![]()
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Affiliation(s)
- Kyungjun Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea .,LOTTE CHEMICAL R&D Center Daejeon 34110 Republic of Korea
| | - Dong Woo Kang
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Youngheon Choi
- LOTTE CHEMICAL R&D Center Daejeon 34110 Republic of Korea
| | - Wanggyu Kim
- LOTTE CHEMICAL R&D Center Daejeon 34110 Republic of Korea
| | - Hyunjoo Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Jae W Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
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14
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Trandafir M, Neaţu S, Bocîrnea A, Counsell J, Cavani F, Florea M, Neaţu F. The Role of Acidity in Terephthalic Acid Synthesis from Renewable Carbon Source. ChemCatChem 2020. [DOI: 10.1002/cctc.202001388] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Mihaela‐Mirela Trandafir
- Institution National Institute of Materials Physics 405A Atomistilor Street 077125 Magurele Romania
| | - Stefan Neaţu
- Institution National Institute of Materials Physics 405A Atomistilor Street 077125 Magurele Romania
| | - Amelia Bocîrnea
- Institution National Institute of Materials Physics 405A Atomistilor Street 077125 Magurele Romania
| | - Jonathan Counsell
- Kratos Analytical Wharfside Trafford Wharf Road Manchester M17 1GP UK
| | - Fabrizio Cavani
- Department of Industrial Chemistry “Toso Montanari” University of Bologna Viale Risorgimento 4 40136 Bologna Italy
| | - Mihaela Florea
- Institution National Institute of Materials Physics 405A Atomistilor Street 077125 Magurele Romania
| | - Florentina Neaţu
- Institution National Institute of Materials Physics 405A Atomistilor Street 077125 Magurele Romania
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15
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Petallidou KC, Vasiliades MA, Efstathiou AM. Deactivation of Co/γ-Al2O3 in CO methanation studied by transient isotopic experiments: The effect of Co particle size. J Catal 2020. [DOI: 10.1016/j.jcat.2020.05.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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16
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Zijlstra B, Broos RJP, Chen W, Bezemer GL, Filot IAW, Hensen EJM. The Vital Role of Step-Edge Sites for Both CO Activation and Chain Growth on Cobalt Fischer–Tropsch Catalysts Revealed through First-Principles-Based Microkinetic Modeling Including Lateral Interactions. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02420] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bart Zijlstra
- Laboratory of Inorganic Materials & Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | - Robin J. P. Broos
- Laboratory of Inorganic Materials & Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | - Wei Chen
- Laboratory of Inorganic Materials & Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | - G. Leendert Bezemer
- Shell Global Solutions International B.V., Grasweg 31, 1031 HW Amsterdam, The Netherlands
| | - Ivo A. W. Filot
- Laboratory of Inorganic Materials & Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | - Emiel J. M. Hensen
- Laboratory of Inorganic Materials & Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
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17
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Ciufo RA, Han S, Floto ME, Eichler JE, Henkelman G, Mullins CB. Hydrogen desorption from the surface and subsurface of cobalt. Phys Chem Chem Phys 2020; 22:15281-15287. [PMID: 32617541 DOI: 10.1039/d0cp02410d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The influence of coverage on the diffusion of hydrogen into the subsurface of cobalt was studied using density functional theory (DFT) and temperature programmed desorption (TPD). DFT calculations show that as the hydrogen coverage on Co(0001) increases, the barrier for hydrogen diffusion into the bulk decreases by 20%. Additionally, subsurface hydrogen on a hydrogen covered surface was found to be more stable when compared to a clean cobalt surface. To test these theoretical findings experimentally, excited hydrogen was used in an ultra-high vacuum environment to access higher hydrogen coverages. Our TPD studies showed that at high hydrogen coverages, a sharp low temperature feature appeared, indicating the stabilization of subsurface hydrogen. Further DFT calculations indicate that this sharp low temperature feature results from associative hydrogen desorption from a hydrogen saturated surface with a population of subsurface hydrogen. Microkinetic modelling was used to model the TPD spectra for hydrogen desporption from cobalt with and without subsurface hydrogen, showing reasonable agreement with experiment.
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Affiliation(s)
- Ryan A Ciufo
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712, USA.
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18
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Weststrate CJ, Sharma D, Garcia Rodriguez D, Gleeson MA, Fredriksson HOA, Niemantsverdriet JW. Reactivity of C3Hx Adsorbates in Presence of Co-adsorbed CO and Hydrogen: Testing Fischer–Tropsch Chain Growth Mechanisms. Top Catal 2020. [DOI: 10.1007/s11244-020-01306-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Trends and Outlook of Computational Chemistry and Microkinetic Modeling for Catalytic Synthesis of Methanol and DME. Catalysts 2020. [DOI: 10.3390/catal10060655] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The first-principle modeling of heterogeneous catalysts is a revolutionarily approach, as the electronic structure of a catalyst is closely related to its reactivity on the surface with reactant molecules. In the past, detailed reaction mechanisms could not be understood, however, computational chemistry has made it possible to analyze a specific elementary reaction of a reaction system. Microkinetic modeling is a powerful tool for investigating elementary reactions and reaction mechanisms for kinetics. Using a microkinetic model, the dominant pathways and rate-determining steps can be elucidated among the competitive reactions, and the effects of operating conditions on the reaction mechanisms can be determined. Therefore, the combination of computational chemistry and microkinetic modeling can significantly improve computational catalysis research. In this study, we reviewed the trends and outlook of this combination technique as applied to the catalytic synthesis of methanol (MeOH) and dimethyl ether (DME), whose detailed mechanisms are still controversial. Although the scope is limited to the catalytic synthesis of limited species, this study is expected to provide a foundation for future works in the field of catalysis research based on computational catalysis.
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The Effect of CO Partial Pressure on Important Kinetic Parameters of Methanation Reaction on Co-Based FTS Catalyst Studied by SSITKA-MS and Operando DRIFTS-MS Techniques. Catalysts 2020. [DOI: 10.3390/catal10050583] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
A 20 wt% Co-0.05 wt% Pt/γ-Al2O3 catalyst was investigated to obtain a fundamental understanding of the effect of CO partial pressure (constant H2 partial pressure) on important kinetic parameters of the methanation reaction (x vol% CO/25 vol% H2, x = 3, 5 and 7) by performing advanced transient isotopic and operando diffuse reflectance infrared Fourier transform spectroscopy–mass spectrometry (DRIFTS-MS) experiments. Steady State Isotopic Transient Kinetic Analysis (SSITKA) experiments conducted at 1.2 bar, 230 °C after 5 h in CO/H2 revealed that the surface coverages, θCO and θCHx and the mean residence times, τCO, and τCHx (s) of the reversibly adsorbed CO-s and active CHx-s (Cα) intermediates leading to CH4, respectively, increased with increasing CO partial pressure. On the contrary, the apparent activity (keff, s−1) of CHx-s intermediates, turnover frequency (TOF, s−1) of methanation reaction, and the CH4-selectivity (SCH4, %) were found to decrease. Transient isothermal hydrogenation (TIH) following the SSITKA step-gas switch provided important information regarding the reactivity and concentration of active (Cα) and inactive -CxHy (Cβ) carbonaceous species formed after 5 h in the CO/H2 reaction. The latter Cβ species were readily hydrogenated at 230 °C in 50%H2/Ar. The surface coverage of Cβ was found to vary only slightly with increasing CO partial pressure. Temperature-programmed hydrogenation (TPH) following SSITKA and TIH revealed that other types of inactive carbonaceous species (Cγ) were formed during Fischer-Tropsch Synthesis (FTS) and hydrogenated at elevated temperatures (250–550 °C). The amount of Cγ was found to significantly increase with increasing CO partial pressure. All carbonaceous species hydrogenated during TIH and TPH revealed large differences in their kinetics of hydrogenation with respect to the CO partial pressure in the CO/H2 reaction mixture. Operando DRIFTS-MS transient isothermal hydrogenation of adsorbed CO-s formed after 2 h in 5 vol% CO/25 vol% H2/Ar at 200 °C coupled with kinetic modeling (H-assisted CO hydrogenation) provided information regarding the relative reactivity (keff) for CH4 formation of the two kinds of linear-type adsorbed CO-s on the cobalt surface.
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21
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Mendes PCD, Ocampo-Restrepo VK, Da Silva JLF. Ab initio investigation of quantum size effects on the adsorption of CO 2, CO, H 2O, and H 2 on transition-metal particles. Phys Chem Chem Phys 2020; 22:8998-9008. [PMID: 32293626 DOI: 10.1039/d0cp00880j] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Adsorption is a crucial preliminary step for the conversion of CO2 into higher-value chemicals, nonetheless, the atomistic understanding of how substrate particle size affects this step is still incomplete. In this study, we employed density functional theory to investigate the effects of particle size on the adsorption of model molecules involved in the CO2 transformations (CO2, CO, H2O and H2) on Con, Nin and Cun particles with different sizes (n = 13, 55, 147) and on the respective close-packed surfaces. We found significant size-dependence of the adsorption properties for physisorbed (linear) and chemisorbed (bent) CO2 on the substrates and distinct (symmetric or asymmetric) stretching of the C-O bonds, which can play a crucial role to understand the CO2 dissociation pathways. For CO and H2, some properties showed small oscillations, due to size effects that induced alternation of the adsorption site preference for different particle sizes; for H2O, the adsorption properties were almost independent of particle size. The presence of low-coordinated adsorption sites resulted in a trend for stronger adsorption and greater charge transfer for smaller clusters. Fixing the size-independent factors (e.g., type of metal), our results show that CO2 adsorption on transition-metal clusters is significantly affected by particle size, suggesting that substrate particle size could be a key factor to understand and control the catalytic transformations of CO2.
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Affiliation(s)
- Paulo C D Mendes
- São Carlos Institute of Chemistry, University of São Paulo, PO Box 780, 13560-970, São Carlos, São Paulo, Brazil.
| | - Vivianne K Ocampo-Restrepo
- São Carlos Institute of Chemistry, University of São Paulo, PO Box 780, 13560-970, São Carlos, São Paulo, Brazil.
| | - Juarez L F Da Silva
- São Carlos Institute of Chemistry, University of São Paulo, PO Box 780, 13560-970, São Carlos, São Paulo, Brazil.
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22
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Mechanistic insight into carbon-carbon bond formation on cobalt under simulated Fischer-Tropsch synthesis conditions. Nat Commun 2020; 11:750. [PMID: 32029729 PMCID: PMC7005166 DOI: 10.1038/s41467-020-14613-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 01/13/2020] [Indexed: 12/04/2022] Open
Abstract
Facile C-C bond formation is essential to the formation of long hydrocarbon chains in Fischer-Tropsch synthesis. Various chain growth mechanisms have been proposed previously, but spectroscopic identification of surface intermediates involved in C-C bond formation is scarce. We here show that the high CO coverage typical of Fischer-Tropsch synthesis affects the reaction pathways of C2Hx adsorbates on a Co(0001) model catalyst and promote C-C bond formation. In-situ high resolution x-ray photoelectron spectroscopy shows that a high CO coverage promotes transformation of C2Hx adsorbates into the ethylidyne form, which subsequently dimerizes to 2-butyne. The observed reaction sequence provides a mechanistic explanation for CO-induced ethylene dimerization on supported cobalt catalysts. For Fischer-Tropsch synthesis we propose that C-C bond formation on the close-packed terraces of a cobalt nanoparticle occurs via methylidyne (CH) insertion into long chain alkylidyne intermediates, the latter being stabilized by the high surface coverage under reaction conditions. The mechanism by which C-C bonds form during Fischer-Tropsch synthesis remains debated while spectroscopic identification of reaction intermediates remains scarce. Here, the authors identify alkylidynes as reactive intermediates for C-C bond formation on cobalt terrace sites and moreover show that these intermediates are stabilized by the high surface coverage typical for Fischer-Tropsch synthesis.
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23
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Zijlstra B, Broos RJ, Chen W, Filot IA, Hensen EJ. First-principles based microkinetic modeling of transient kinetics of CO hydrogenation on cobalt catalysts. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.03.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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Weststrate C, Mahmoodinia M, Farstad MH, Svenum IH, Strømsheim MD, Niemantsverdriet J, Venvik HJ. Interaction of hydrogen with flat (0001) and corrugated (11–20) and (10–12) cobalt surfaces: Insights from experiment and theory. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.04.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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25
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Chen BWJ, Mavrikakis M. How coverage influences thermodynamic and kinetic isotope effects for H2/D2 dissociative adsorption on transition metals. Catal Sci Technol 2020. [DOI: 10.1039/c9cy02338k] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Hydrogen isotope effects are influenced by adsorbate coverage: at high coverages, isotope effects are lower than at low coverages. This helps to rationalize observed isotope effects, allowing more precise elucidation of reaction mechanisms.
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Affiliation(s)
- Benjamin W. J. Chen
- Department of Chemical and Biological Engineering
- University of Wisconsin – Madison
- Madison
- USA
| | - Manos Mavrikakis
- Department of Chemical and Biological Engineering
- University of Wisconsin – Madison
- Madison
- USA
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26
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Vasiliades M, Kalamaras C, Govender N, Govender A, Efstathiou A. The effect of preparation route of commercial Co/γ-Al2O3 catalyst on important Fischer-Tropsch kinetic parameters studied by SSITKA and CO-DRIFTS transient hydrogenation techniques. J Catal 2019. [DOI: 10.1016/j.jcat.2019.09.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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27
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De Vrieze JE, Bremmer GM, Aly M, Navarro V, Thybaut JW, Kooyman PJ, Saeys M. Shape of Cobalt and Platinum Nanoparticles Under a CO Atmosphere: A Combined In Situ TEM and Computational Catalysis Study. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01840] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jenoff E. De Vrieze
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
| | - G. Marien Bremmer
- Huygens-Kamerlingh Onnes Laboratory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
| | - Mostafa Aly
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
| | - Violeta Navarro
- Huygens-Kamerlingh Onnes Laboratory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
| | - Joris W. Thybaut
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
| | - Patricia J. Kooyman
- Catalysis Institute, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa
| | - Mark Saeys
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
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28
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Piccolo L, Chatelier C, De Weerd MC, Morfin F, Ledieu J, Fournée V, Gille P, Gaudry E. Catalytic properties of Al 13TM 4 complex intermetallics: influence of the transition metal and the surface orientation on butadiene hydrogenation. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2019; 20:557-567. [PMID: 31258823 PMCID: PMC6586146 DOI: 10.1080/14686996.2019.1608792] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 04/14/2019] [Accepted: 04/15/2019] [Indexed: 06/09/2023]
Abstract
Complex intermetallic compounds such as transition metal (TM) aluminides are promising alternatives to expensive Pd-based catalysts, in particular for the semi-hydrogenation of alkynes or alkadienes. Here, we compare the gas-phase butadiene hydrogenation performances of o-Al13Co4(100), m-Al13Fe4(010) and m-Al13Ru4(010) surfaces, whose bulk terminated structural models exhibit similar cluster-like arrangements. Moreover, the effect of the surface orientation is assessed through a comparison between o-Al13Co4(100) and o-Al13Co4(010). As a result, the following room-temperature activity order is determined: Al13Co4(100) < Al13Co4(010) < Al13Ru4(010) < Al13Fe4(010). Moreover, Al13Co4(010) is found to be the most active surface at 110°C, and even more selective to butene (100%) than previously investigated Al13Fe4(010). DFT calculations show that the activity and selectivity results can be rationalized through the determination of butadiene and butene adsorption energies; in contrast, hydrogen adsorption energies do not scale with the catalytic activities. Moreover, the calculation of projected densities of states provides an insight into the Al13TM4 surface electronic structure. Isolating the TM active centers within the Al matrix induces a narrowing of the TM d-band, which leads to the high catalytic performances of Al13TM4 compounds.
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Affiliation(s)
- Laurent Piccolo
- Univ Lyon, Université Claude Bernard - Lyon 1, CNRS, IRCELYON, Villeurbanne, France
| | - Corentin Chatelier
- Université de Lorraine, CNRS, IJL, Nancy, France
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, France
| | | | - Franck Morfin
- Univ Lyon, Université Claude Bernard - Lyon 1, CNRS, IRCELYON, Villeurbanne, France
| | | | | | - Peter Gille
- Department of Earth and Environmental Sciences, Crystallography Section, Ludwig-Maximilians-Universität München, München, Germany
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29
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Wang Y, Kunz MR, Fang Z, Yablonsky G, Fushimi R. Accumulation Dynamics as a New Tool for Catalyst Discrimination: An Example from Ammonia Decomposition. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b01470] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yixiao Wang
- Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
| | - M. Ross Kunz
- Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
| | - Zongtang Fang
- Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
| | - Gregory Yablonsky
- Washington University in Saint Louis, Saint Louis, Missouri 63103, United States
| | - Rebecca Fushimi
- Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
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30
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Kizilkaya AC, Niemantsverdriet JW, Weststrate CJ. Effect of ammonia on cobalt Fischer–Tropsch synthesis catalysts: a surface science approach. Catal Sci Technol 2019. [DOI: 10.1039/c8cy01723a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Undercoordinated (defect) sites on cobalt surfaces favor NH3 decomposition and dehydrogenated products adsorb strongly around these defect sites.
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Affiliation(s)
- Ali Can Kizilkaya
- Department of Chemical Engineering
- Izmir Institute of Technology
- Izmir
- Turkey
- Laboratory for Physical Chemistry of Surfaces
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31
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Weststrate C, Niemantsverdriet J. CO as a Promoting Spectator Species of CxHy Conversions Relevant for Fischer–Tropsch Chain Growth on Cobalt: Evidence from Temperature-Programmed Reaction and Reflection Absorption Infrared Spectroscopy. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02743] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- C.J. Weststrate
- SynCat@DIFFER, Syngaschem BV, P.O. Box 6336, 5600 HH Eindhoven, The Netherlands
| | - J.W. Niemantsverdriet
- SynCat@DIFFER, Syngaschem BV, P.O. Box 6336, 5600 HH Eindhoven, The Netherlands
- SynCat@Beijing, Synfuels China Technology Co. Ltd., Leyuan South Street II, No. 1,
Huairou District, 101407 Beijing, China
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32
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Vos MJ, van Straaten G, Kessels WMME, Mackus AJM. Atomic Layer Deposition of Cobalt Using H 2-, N 2-, and NH 3-Based Plasmas: On the Role of the Co-reactant. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2018; 122:22519-22529. [PMID: 30319724 PMCID: PMC6174421 DOI: 10.1021/acs.jpcc.8b06342] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 08/10/2018] [Indexed: 06/08/2023]
Abstract
This work investigates the role of the co-reactant for the atomic layer deposition of cobalt (Co) films using cobaltocene (CoCp2) as the precursor. Three different processes were compared: an AB process using NH3 plasma, an AB process using H2/N2 plasma, and an ABC process using subsequent N2 and H2 plasmas. A connection was made between the plasma composition and film properties, thereby gaining an understanding of the role of the various plasma species. For NH3 plasma, H2 and N2 were identified as the main species apart from the expected NH3, whereas for the H2/N2 plasma, NH3 was detected. Moreover, HCp was observed as a reaction product in the precursor and co-reactant subcycles. Both AB processes showed self-limiting half-reactions and yielded similar material properties, that is, high purity and low resistivity. For the AB process with H2/N2, the resistivity and impurity content depended on the H2/N2 mixing ratio, which was linked to the production of NH3 molecules and related radicals. The ABC process resulted in high-resistivity and low-purity films, attributed to the lack of NH x,x≤3 species during the co-reactant exposures. The obtained insights are summarized in a reaction scheme where CoCp2 chemisorbs in the precursor subcycle and NH x species eliminate the remaining Cp in the consecutive subcycle.
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33
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García-Díez K, Fernández-Fernández J, Alonso JA, López MJ. Theoretical study of the adsorption of hydrogen on cobalt clusters. Phys Chem Chem Phys 2018; 20:21163-21176. [PMID: 30079921 DOI: 10.1039/c8cp03048k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Adsorption and dissociation of molecular hydrogen on transition metal clusters are basic processes of broad technological application in fields such as catalysis, hydrogenation reactions, hydrogen fuel cells, hydrogen storage, etc. Here we focus on two cobalt clusters, Co6 and Co13, and use the density functional formalism to investigate: (i) the mechanisms for adsorption and dissociation of hydrogen, and (ii) the competition between the two processes as the amount of hydrogen increases towards cluster saturation. The dissociative adsorption of hydrogen is the preferred adsorption channel for low coverage. Each individual H atom binds to the cluster with an ionic type of bonding, similar to that in metal hydrides. The electronic levels of the H atoms hybridize with the deepest levels of the Co cluster, leading to the stabilization of the system. In contrast H2 binds to the cluster with a weak covalent type of bond and the electronic density of the molecule becomes polarized. The electronic levels of the molecule are deeper than those of the Co cluster and do not hybridize with them, which explains the weak bonding of the molecule to the cluster. Interestingly, the high magnetic moments of the Co clusters do not change when H2 is adsorbed in molecular form, but the magnetic moments decrease by two Bohr magnetons upon dissociative adsorption of the molecule. Adsorption and dissociation of H2 on Co6 and Co13 exhibit similar features, although the adsorption energies on Co13 are stronger. Saturation of Co6 with hydrogen has been also investigated. Co6 can adsorb up to four H2 molecules in the dissociated form. Additional hydrogen is adsorbed in molecular form leading to a saturated cluster with sixteen hydrogen molecules, four dissociated and twelve molecular. This limit corresponds to a content of 8.4 wt% of hydrogen in the Co cluster, which is promising for the purpose of hydrogen storage.
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Affiliation(s)
- Kevin García-Díez
- Departamento de Física Teórica, Atómica y Optica, University of Valladolid, 47011 Valladolid, Spain.
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34
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Gao X, Niu L, Qiao X, Feng W, Cao Y, Bai G. Facile Preparation of a Stable Fe3
O4
@LDH@NiB Magnetic Core-Shell Nanocomposite for Hydrogenation. CHINESE J CHEM 2017. [DOI: 10.1002/cjoc.201600759] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xuejia Gao
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science; Hebei University; Baoding Hebei 071002 China
| | - Libo Niu
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science; Hebei University; Baoding Hebei 071002 China
| | - Xianliang Qiao
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science; Hebei University; Baoding Hebei 071002 China
| | - Wenhui Feng
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science; Hebei University; Baoding Hebei 071002 China
| | - Yingying Cao
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science; Hebei University; Baoding Hebei 071002 China
| | - Guoyi Bai
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science; Hebei University; Baoding Hebei 071002 China
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35
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Weststrate CJ, Niemantsverdriet JW. Understanding FTS selectivity: the crucial role of surface hydrogen. Faraday Discuss 2017; 197:101-116. [PMID: 28170012 DOI: 10.1039/c6fd00191b] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Monomeric forms of carbon play a central role in the synthesis of long chain hydrocarbons via the Fischer-Tropsch synthesis (FTS). We explored the chemistry of C1Hxad species on the close-packed surface of cobalt. Our findings on this simple model catalyst highlight the important role of surface hydrogen and vacant sites for product selectivity. We furthermore find that COad affects hydrogen in multiple ways. It limits the adsorption capacity for Had, lowers its adsorption energy and inhibits dissociative H2 adsorption. We discuss how these findings, extrapolated to pressures and temperatures used in applied FTS, can provide insights into the correlation between partial pressure of reactants and product selectivity. By combining the C1Hx stability differences found in the present work with literature reports of the reactivity of C1Hx species measured by steady state isotope transient kinetic analysis, we aim to shed light on the nature of the atomic carbon reservoir found in these studies.
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Affiliation(s)
- C J Weststrate
- SynCat@DIFFER, Syngaschem BV, PO Box 6336, 5600 HH Eindhoven, The Netherlands.
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36
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van Helden P, Berg JAVD, Petersen MA, Janse van Rensburg W, Ciobîcă IM, van de Loosdrecht J. Computational investigation of the kinetics and mechanism of the initial steps of the Fischer-Tropsch synthesis on cobalt. Faraday Discuss 2017; 197:117-151. [PMID: 28186212 DOI: 10.1039/c6fd00197a] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A multi-site microkinetic model for the Fischer-Tropsch synthesis (FTS) reaction up to C2 products on a FCC cobalt catalyst surface is presented. This model utilizes a multi-faceted cobalt nanoparticle model for the catalyst, consisting of the two dominant cobalt surface facets Co(111) and Co(100), and a step site represented by the Co(211) surface. The kinetic parameters for the intermediates and transition states on these sites were obtained using plane-wave, periodic boundary condition density functional theory. Using direct DFT data as is, the microkinetic results disagree with the expected experimental results. Employing an exploratory approach, a small number of microkinetic model modifications were tested, which significantly improved correspondence to the expected experimental results. Using network flux and sensitivity analysis, an in-depth discussion is given on the relative reactivity of the various sites, CO activation mechanisms, the nature of the reactive chain growth monomer, the probable C2 formation mechanism, the active site ensemble interplay and the very important role of CO* surface coverage. The findings from the model scenarios are discussed with the aim of guiding future work in understanding the FTS mechanism and subsequent controlling kinetic parameters.
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37
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Gao W, Wang P, Guo J, Chang F, He T, Wang Q, Wu G, Chen P. Barium Hydride-Mediated Nitrogen Transfer and Hydrogenation for Ammonia Synthesis: A Case Study of Cobalt. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00284] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wenbo Gao
- Dalian
National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Peikun Wang
- Dalian
National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianping Guo
- Dalian
National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- Collaborative Innovation Center of Chemistry for Energy Materials, Dalian 116023, China
| | - Fei Chang
- Dalian
National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Teng He
- Dalian
National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Qianru Wang
- Dalian
National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guotao Wu
- Dalian
National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Ping Chen
- Dalian
National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- Collaborative Innovation Center of Chemistry for Energy Materials, Dalian 116023, China
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38
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Wu CH, Eren B, Bluhm H, Salmeron MB. Ambient-Pressure X-ray Photoelectron Spectroscopy Study of Cobalt Foil Model Catalyst under CO, H2, and Their Mixtures. ACS Catal 2017. [DOI: 10.1021/acscatal.6b02835] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Cheng Hao Wu
- Department of Chemistry and ∥Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
- Materials Sciences Division and §Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Baran Eren
- Department of Chemistry and ∥Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
- Materials Sciences Division and §Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Hendrik Bluhm
- Department of Chemistry and ∥Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
- Materials Sciences Division and §Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Miquel B. Salmeron
- Department of Chemistry and ∥Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
- Materials Sciences Division and §Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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39
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Liu H, Zhang R, Ling L, Wang Q, Wang B, Li D. Insight into the preferred formation mechanism of long-chain hydrocarbons in Fischer–Tropsch synthesis on Hcp Co(10−11) surfaces from DFT and microkinetic modeling. Catal Sci Technol 2017. [DOI: 10.1039/c7cy01436h] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DFT calculations, together with microkinetic modeling, have been employed to probe into the preferred mechanism of hydrocarbon C–C chain growth on Co(10−11) surfaces during Fischer–Tropsch synthesis.
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Affiliation(s)
- Hongxia Liu
- Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province
- Taiyuan University of Technology
- Taiyuan 030024
- P.R. China
| | - Riguang Zhang
- Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province
- Taiyuan University of Technology
- Taiyuan 030024
- P.R. China
| | - Lixia Ling
- Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province
- Taiyuan University of Technology
- Taiyuan 030024
- P.R. China
| | - Qiang Wang
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry, Chinese Academy of Science
- Taiyuan 030001
- PR China
| | - Baojun Wang
- Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province
- Taiyuan University of Technology
- Taiyuan 030024
- P.R. China
| | - Debao Li
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry, Chinese Academy of Science
- Taiyuan 030001
- PR China
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40
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Hu X, Zhou Y, Jiang B, Guo H, Xie D. Dynamics of carbon monoxide dissociation on Co(112̄0). Phys Chem Chem Phys 2017; 19:12826-12837. [DOI: 10.1039/c7cp01697b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The dissociative chemisorption dynamics of CO on rigid Co(112̄0) is investigated using a quasi-classical trajectory method on a new global six-dimensional potential energy surface.
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Affiliation(s)
- Xixi Hu
- Institute of Theoretical and Computational Chemistry
- Key Laboratory of Mesoscopic Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Yipeng Zhou
- Institute of Theoretical and Computational Chemistry
- Key Laboratory of Mesoscopic Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Bin Jiang
- Department of Chemical Physics
- University of Science and Technology of China
- Hefei 230026
- China
| | - Hua Guo
- Department of Chemistry and Chemical Biology
- University of New Mexico
- Albuquerque
- USA
| | - Daiqian Xie
- Institute of Theoretical and Computational Chemistry
- Key Laboratory of Mesoscopic Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
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41
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Liu Y, Zhou K, Shu H, Liu H, Lou J, Guo D, Wei Z, Li X. Switchable synthesis of furfurylamine and tetrahydrofurfurylamine from furfuryl alcohol over RANEY® nickel. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00981j] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Switchable reductive amination of furfuryl alcohol to tetrahydrofurfurylamine and furfurylamine was realized by adding/not adding H2 over a RANEY® Ni catalyst.
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Affiliation(s)
- Yingxin Liu
- Research and Development Base of Catalytic Hydrogenation
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou 310014
- P.R. China
| | - Kuo Zhou
- Research and Development Base of Catalytic Hydrogenation
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou 310014
- P.R. China
| | - Huimin Shu
- Research and Development Base of Catalytic Hydrogenation
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou 310014
- P.R. China
| | - Haiyan Liu
- Research and Development Base of Catalytic Hydrogenation
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou 310014
- P.R. China
| | - Jiongtao Lou
- Key Laboratory of Biomass Chemical Engineering of the Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- P.R. China
| | - Dechao Guo
- Key Laboratory of Biomass Chemical Engineering of the Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- P.R. China
| | - Zuojun Wei
- Key Laboratory of Biomass Chemical Engineering of the Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- P.R. China
| | - Xiaonian Li
- Institute of Industrial Catalysis
- College of Chemical Engineering
- Zhejiang University of Technology
- Hangzhou 310014
- P.R. China
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42
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Spectroscopic insights into cobalt-catalyzed Fischer-Tropsch synthesis: A review of the carbon monoxide interaction with single crystalline surfaces of cobalt. J Catal 2016. [DOI: 10.1016/j.jcat.2016.07.010] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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43
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Weststrate C, van Helden P, Niemantsverdriet J. Reflections on the Fischer-Tropsch synthesis: Mechanistic issues from a surface science perspective. Catal Today 2016. [DOI: 10.1016/j.cattod.2016.04.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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44
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Kistamurthy D, Saib A, Moodley D, Preston H, Ciobîcă I, van Rensburg WJ, Niemantsverdriet J, Weststrate C. The role of carboxylic acid in cobalt Fischer-Tropsch synthesis catalyst deactivation. Catal Today 2016. [DOI: 10.1016/j.cattod.2015.11.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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45
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Lai Q, Paskevicius M, Sheppard DA, Buckley CE, Thornton AW, Hill MR, Gu Q, Mao J, Huang Z, Liu HK, Guo Z, Banerjee A, Chakraborty S, Ahuja R, Aguey-Zinsou KF. Hydrogen Storage Materials for Mobile and Stationary Applications: Current State of the Art. CHEMSUSCHEM 2015; 8:2789-2825. [PMID: 26033917 DOI: 10.1002/cssc.201500231] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 03/10/2015] [Indexed: 06/04/2023]
Abstract
One of the limitations to the widespread use of hydrogen as an energy carrier is its storage in a safe and compact form. Herein, recent developments in effective high-capacity hydrogen storage materials are reviewed, with a special emphasis on light compounds, including those based on organic porous structures, boron, nitrogen, and aluminum. These elements and their related compounds hold the promise of high, reversible, and practical hydrogen storage capacity for mobile applications, including vehicles and portable power equipment, but also for the large scale and distributed storage of energy for stationary applications. Current understanding of the fundamental principles that govern the interaction of hydrogen with these light compounds is summarized, as well as basic strategies to meet practical targets of hydrogen uptake and release. The limitation of these strategies and current understanding is also discussed and new directions proposed.
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Affiliation(s)
- Qiwen Lai
- MERLin Group, School of Chemical Engineering, The University of New South Wales, Sydney NSW 2052 (Australia), Fax: (+61) 02-938-55966
| | - Mark Paskevicius
- Department of Chemistry and iNANO, Aarhus University, Aarhus 8000 (Denmark)
- Department of Physics, Astronomy and Medical Radiation Sciences, Curtin University, Bentley WA 6102 (Australia)
| | - Drew A Sheppard
- Department of Physics, Astronomy and Medical Radiation Sciences, Curtin University, Bentley WA 6102 (Australia)
| | - Craig E Buckley
- Department of Physics, Astronomy and Medical Radiation Sciences, Curtin University, Bentley WA 6102 (Australia)
| | | | - Matthew R Hill
- CSIRO, Private Bag 10, Clayton South MDC, VIC 3169 (Australia)
| | - Qinfen Gu
- Australian Synchrotron, Clayton, VIC 3168 (Australia)
| | - Jianfeng Mao
- Institute for Superconducting and Electronic Materials, Innovation Campus, University of Wollongong, Squires Way, NSW 2500 (Australia)
| | - Zhenguo Huang
- Institute for Superconducting and Electronic Materials, Innovation Campus, University of Wollongong, Squires Way, NSW 2500 (Australia)
| | - Hua Kun Liu
- Institute for Superconducting and Electronic Materials, Innovation Campus, University of Wollongong, Squires Way, NSW 2500 (Australia)
| | - Zaiping Guo
- Institute for Superconducting and Electronic Materials, Innovation Campus, University of Wollongong, Squires Way, NSW 2500 (Australia)
| | - Amitava Banerjee
- Condensed Matter Theory Group, Department of Physics & Astronomy, Uppsala University, Box 516, 75120 Uppsala (Sweden)
| | - Sudip Chakraborty
- Condensed Matter Theory Group, Department of Physics & Astronomy, Uppsala University, Box 516, 75120 Uppsala (Sweden)
| | - Rajeev Ahuja
- Condensed Matter Theory Group, Department of Physics & Astronomy, Uppsala University, Box 516, 75120 Uppsala (Sweden)
| | - Kondo-Francois Aguey-Zinsou
- MERLin Group, School of Chemical Engineering, The University of New South Wales, Sydney NSW 2052 (Australia), Fax: (+61) 02-938-55966.
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46
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Guo J, Chang F, Wang P, Hu D, Yu P, Wu G, Xiong Z, Chen P. Highly Active MnN–Li2NH Composite Catalyst for Producing COx-Free Hydrogen. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00278] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jianping Guo
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Fei Chang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Peikun Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Daqiang Hu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Pei Yu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Guotao Wu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Zhitao Xiong
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Ping Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
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47
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Jiang B, Hu X, Lin S, Xie D, Guo H. Six-dimensional quantum dynamics of dissociative chemisorption of H2 on Co(0001) on an accurate global potential energy surface. Phys Chem Chem Phys 2015; 17:23346-55. [DOI: 10.1039/c5cp03324a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Six-dimensional quantum dynamics of hydrogen dissociative chemisorption on Co(0001) is investigated on a DFT based potential energy surface.
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Affiliation(s)
- Bin Jiang
- Department of Chemistry and Chemical Biology
- University of New Mexico
- Albuquerque
- USA
| | - Xixi Hu
- Department of Chemistry and Chemical Biology
- University of New Mexico
- Albuquerque
- USA
- Institute of Theoretical and Computational Chemistry
| | - Sen Lin
- State Key Laboratory of Photocatalysis on Energy and Environment
- College of Chemistry
- Fuzhou University
- Fuzhou 350002
- China
| | - Daiqian Xie
- Institute of Theoretical and Computational Chemistry
- Key Laboratory of Mesoscopic Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Hua Guo
- Department of Chemistry and Chemical Biology
- University of New Mexico
- Albuquerque
- USA
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48
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On the Kinetic Interpretation of DFT-Derived Energy Profiles: Cu-Catalyzed Methanol Synthesis. Catal Letters 2014. [DOI: 10.1007/s10562-014-1407-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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49
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Lewis EA, Marcinkowski MD, Murphy CJ, Liriano ML, Sykes ECH. Hydrogen Dissociation, Spillover, and Desorption from Cu-Supported Co Nanoparticles. J Phys Chem Lett 2014; 5:3380-3385. [PMID: 26278448 DOI: 10.1021/jz5016789] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Co-Cu nanoparticles have recently been explored for Fischer-Tropsch synthesis (FTS) as a way to combine the long chain selectivity of Co with Cu's activity for alcohol formation in order to synthesize oxygenated transportation fuels. Depending on particle size, hydrogen dissociation can be a rate-determining step in cobalt-catalyzed FTS. To understand the fundamentals of uptake and release of hydrogen from the Co/Cu bimetallic system, we prepared well-defined Co nanoparticles on Cu(111). We demonstrate that hydrogen spills over from dissociation sites on the Co nanoparticles to the Cu(111) surface via the Co-Cu interface and that desorption of H occurs at a temperature that is lower than from Co or Cu alone, which we attribute to the Co-Cu interface sites. From this data, we have constructed an energy landscape for the facile dissociation, spillover, and desorption of hydrogen on the Co-Cu bimetallic system.
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Affiliation(s)
- Emily A Lewis
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | | | - Colin J Murphy
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - Melissa L Liriano
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - E Charles H Sykes
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
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50
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Yan N, Zhao Z, Li Y, Wang F, Zhong H, Chen Q. Synthesis of Novel Two-Phase Co@SiO2 Nanorattles with High Catalytic Activity. Inorg Chem 2014; 53:9073-9. [DOI: 10.1021/ic501092k] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Nan Yan
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Materials Science & Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Ziang Zhao
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Materials Science & Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Yan Li
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Materials Science & Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Fang Wang
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Materials Science & Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Hao Zhong
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Materials Science & Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Qianwang Chen
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Materials Science & Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230026, People’s Republic of China
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