1
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Goethem CV, Shen Y, Chi HY, Mensi M, Zhao K, Nijmeijer A, Just PE, Agrawal KV. Advancing Molecular Sieving via Å-Scale Pore Tuning in Bottom-Up Graphene Synthesis. ACS NANO 2024. [PMID: 38324377 PMCID: PMC10883125 DOI: 10.1021/acsnano.3c11885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
Porous graphene films are attractive as a gas separation membrane given that the selective layer can be just one atom thick, allowing high-flux separation. A favorable aspect of porous graphene is that the pore size, essentially gaps created by lattice defects, can be tuned. While this has been demonstrated for postsynthetic, top-down pore etching in graphene, it does not exist in the more scalable, bottom-up synthesis of porous graphene. Inspired by the mechanism of precipitation-based synthesis of porous graphene over catalytic nickel foil, we herein conceive an extremely simple way to tune the pore size. This is implemented by increasing the cooling rate by over 100-fold from -1 °C min-1 to over -5 °C s-1. Rapid cooling restricts carbon diffusion, resulting in a higher availability of dissolved carbon for precipitation, as evidenced by quantitative carbon-diffusion simulation, measurement of carbon concentration as a function of nickel depth, and imaging of the graphene nanostructure. The resulting enhanced grain (inter)growth reduces the effective pore size which leads to an increase of the H2/CH4 separation factor from 6.2 up to 53.3.
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Affiliation(s)
- Cédric Van Goethem
- Laboratory for Advanced Separations (LAS), Institute of Chemical Sciences and Engineering (ISIC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Rue de l'industrie 17, 1950 Sion, Switzerland
| | - Yueqing Shen
- Laboratory for Advanced Separations (LAS), Institute of Chemical Sciences and Engineering (ISIC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Rue de l'industrie 17, 1950 Sion, Switzerland
| | - Heng-Yu Chi
- Laboratory for Advanced Separations (LAS), Institute of Chemical Sciences and Engineering (ISIC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Rue de l'industrie 17, 1950 Sion, Switzerland
| | - Mounir Mensi
- X-ray Diffraction and Surface Analytics Platform (XRD-SAP), Institute of Chemical Sciences and Engineering (ISIC), Ecole Polytechnique Fédérale de Lausanne (EPFL-Valais Wallis), Rue de l'industrie 17, 1950 Sion, Switzerland
| | - Kangning Zhao
- Laboratory for Advanced Separations (LAS), Institute of Chemical Sciences and Engineering (ISIC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Rue de l'industrie 17, 1950 Sion, Switzerland
| | - Arian Nijmeijer
- Shell Global Solutions International B.V., P.O. Box 38000, 1030 BN Amsterdam, The Netherlands
- Inorganic Membranes, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Paul-Emmanuel Just
- Shell Global Solutions International B.V., P.O. Box 38000, 1030 BN Amsterdam, The Netherlands
| | - Kumar Varoon Agrawal
- Laboratory for Advanced Separations (LAS), Institute of Chemical Sciences and Engineering (ISIC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Rue de l'industrie 17, 1950 Sion, Switzerland
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2
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Su X, Meng F, Tan H, Chen G. Unravelling the CO2 methanation mechanisms on a Ni-BaTiO3 catalyst: A theoretical investigation. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.102170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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3
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Yoshida M, Tsuji Y, Iguchi S, Nishiguchi H, Yamanaka I, Abe H, Kamachi T, Yoshizawa K. Toward Computational Screening of Bimetallic Alloys for Methane Activation: A Case Study of MgPt Alloy. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01601] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Masataka Yoshida
- Institute for Materials Chemistry and Engineering, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yuta Tsuji
- Institute for Materials Chemistry and Engineering, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
- Faculty of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Shoji Iguchi
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Tokyo 152-8552, Japan
| | - Hikari Nishiguchi
- Graduate School of Science and Technology, Saitama University, Shimo-Okubo 255, Saitama 338-8570, Japan
- Center for Green Research on Energy and Environmental Materials, National Institute for Materials Science, Namiki 1-1,Tsukuba, Ibaraki 305-0044, Japan
| | - Ichiro Yamanaka
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Tokyo 152-8552, Japan
| | - Hideki Abe
- Graduate School of Science and Technology, Saitama University, Shimo-Okubo 255, Saitama 338-8570, Japan
- Center for Green Research on Energy and Environmental Materials, National Institute for Materials Science, Namiki 1-1,Tsukuba, Ibaraki 305-0044, Japan
| | - Takashi Kamachi
- Department of Life, Environment and Applied Chemistry, Fukuoka Institute of Technology, 3-30-1 Wajiro-higashi, Higashi-ku, Fukuoka 811-0295, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
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4
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Lustemberg PG, Senanayake SD, Rodriguez JA, Ganduglia-Pirovano MV. Tuning Selectivity in the Direct Conversion of Methane to Methanol: Bimetallic Synergistic Effects on the Cleavage of C-H and O-H Bonds over NiCu/CeO 2 Catalysts. J Phys Chem Lett 2022; 13:5589-5596. [PMID: 35699247 PMCID: PMC9234976 DOI: 10.1021/acs.jpclett.2c00885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 06/08/2022] [Indexed: 06/15/2023]
Abstract
The efficient activation of methane and the simultaneous water dissociation are crucial in many catalytic reactions on oxide-supported transition metal catalysts. On very low-loaded Ni/CeO2 surfaces, methane easily fully decomposes, CH4 → C + 4H, and water dissociates, H2O→ OH + H. However, in important reactions such as the direct oxidation of methane to methanol (MTM), where complex interplay exists between reactants (CH4, O2), it is desirable to avoid the complete dehydrogenation of methane to carbon. Remarkably, the barrier for the activation of C-H bonds in CHx (x = 1-3) species on Ni/CeO2 surfaces can be manipulated by adding Cu, forming bimetallic NiCu clusters, whereas the ease for cleavage of O-H bonds in water is not affected by ensemble effects, as obtained from density functional theory-based calculations. CH4 activation occurs only on Ni sites, and H2O activation occurs on both Ni and Cu sites. The MTM reaction pathway for the example of the Ni3Cu1/CeO2 model catalyst predicts a higher selectivity and a lower activation barrier for methanol production, compared with that for Ni4/CeO2. These findings point toward a possible strategy to design active and stable catalysts which can be employed for methane activation and conversions.
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Affiliation(s)
- Pablo G. Lustemberg
- Instituto
de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049 Madrid, Spain
- Instituto
de Fisica Rosario (IFIR), CONICET-UNR, Bv. 27 de Febrero 210bis, 2000EZP Rosario, Santa Fe, Argentina
| | - Sanjaya D. Senanayake
- Chemistry
Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - José A. Rodriguez
- Chemistry
Division, Brookhaven National Laboratory, Upton, New York 11973, United States
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5
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Guharoy U, Reina TR, Liu J, Sun Q, Gu S, Cai Q. A theoretical overview on the prevention of coking in dry reforming of methane using non-precious transition metal catalysts. J CO2 UTIL 2021. [DOI: 10.1016/j.jcou.2021.101728] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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Promoting Role of Amorphous Carbon and Carbon Nanotubes Growth Modes of Methane Decomposition in One-Pot Catalytic Approach. Catalysts 2021. [DOI: 10.3390/catal11101217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We report the simultaneous production of hydrogen fuel and carbon nanotubes (CNTs) via methane dehydrogenation catalyzed with Ni/SBA-15. Most Ni nanoparticles (NPs) with size between 10 and 30 nm were highly dispersed on SBA-15 and most of them had a strong interaction with the support. At temperatures ranging from 500 to 800 °C, methane could be decomposed to release hydrogen with 100% selectivity at conversion between 51 and 65%. There was no CO or CO2 detectable in the reaction fluent. In the initial stage of the reaction, amorphous carbon and dehydrogenated methane species adsorbed on the Ni NPs promoted the CH4 decomposition. The amorphous carbon atoms were then transformed into carbon nanotubes which chiefly consisted of a multiwall structure and grew towards different orientations via a tip-growth or a base-growth modes, controlled by the interaction strength between the Ni NPs and the SBA-15 support. Reaction temperature affected not only methane conversion, but also the diffusion of carbon atoms on/in the Ni NPs and their precipitation at the interfaces. At higher temperature, bamboo-like CNTs or onion-like metal-encapsulated carbons were formed, mainly due to the rate of carbon atom formation greater than that of carbon precipitation for CNTs construction. The CNTs formation mechanisms are discussed and their growth modes under different conditions are proposed.
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7
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Qiu H, Ran J, Niu J, Guo F, Ou Z. Effect of different doping ratios of Cu on the carbon formation and the elimination on Ni (111) surface: A DFT study. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2020.111360] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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8
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Russel AS, Chaudhary PK, Jain P, Deo G. Microkinetic and sensitivity analysis of oxidative dry reforming of methane on Ni–Co catalyst using a reaction mechanism based on Ni. REACT CHEM ENG 2021. [DOI: 10.1039/d1re00086a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Microkinetic modelling performed for ODRM reaction. Effects of temperature and space–time variations match well with experimental data. Sensitivity analysis was performed to provide a reduced mechanism.
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Affiliation(s)
- A. S. Russel
- Department of Chemical Engineering, Indian Institute of Technology, Kanpur, India
| | | | - Pulkit Jain
- Department of Chemical Engineering, Indian Institute of Technology, Kanpur, India
| | - Goutam Deo
- Department of Chemical Engineering, Indian Institute of Technology, Kanpur, India
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9
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Mechanistic Insights for Dry Reforming of Methane on Cu/Ni Bimetallic Catalysts: DFT-Assisted Microkinetic Analysis for Coke Resistance. Catalysts 2020. [DOI: 10.3390/catal10091043] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Density functional theory (DFT) calculations have been utilized to evaluate the complete reaction mechanism of methane dry reforming (DRM) over Ni2Cu (111) bimetallic catalyst. The detailed catalytic cycle on Ni2Cu (111) catalyst demonstrated superior coke resistance compared to pure Ni (111) and Ni2Fe (111) reported in the literature. Doping Cu in the Ni–Ni network enhanced the competitive CH oxidation by both atomic O and OH species with the latter having only 0.02 eV higher than the 1.06 eV energy barrier required for CH oxidation by atomic O. Among the C/CH oxidation pathways, C* + O* → CO (g) was the most favorable with an energy barrier of 0.72 eV. This was almost half of the energy barrier required for the rate-limiting step of CH decomposition (1.40 eV) and indicated enhanced coke deposition removal. Finally, we investigated the effect of temperature (800~1000 K) on the carbon deposition and elimination mechanism over Ni2Cu (111) catalyst. Under those realistic DRM conditions, the calculations showed a periodic cycle of simultaneous carbon deposition and elimination resulting in improved catalyst stability.
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10
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Al-Hilfi SH, Derby B, Martin PA, Whitehead JC. Chemical vapour deposition of graphene on copper-nickel alloys: the simulation of a thermodynamic and kinetic approach. NANOSCALE 2020; 12:15283-15294. [PMID: 32647854 DOI: 10.1039/d0nr00302f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Chemical vapour deposition (CVD) of graphene on transition metals is generally believed to be the fabrication route best suited for the production of high-quality large-area graphene sheets. The mechanism of CVD graphene growth is governed by interactions in both the gas phase and at the surface. Here we present a simulation of the CVD graphene growth mechanism which includes thermodynamics, gas phase kinetics and the surface reaction in a sequential manner. The thermodynamic simulation shows that the deposition driving force is the greatest for high carbon to hydrogen ratios and reaches a maximum at around 850 °C. No graphene growth is observed below this temperature. The surface kinetic model also shows that below this temperature, the carbon surface concentration is less than the solubility limit, thus no film can grow. The effect of the reaction chamber geometry on the product concentrations was clear from the gas phase decomposition reactions. The gas residence times studied here (around 0.07 s) show that the optimum gas phase composition is far from that expected at thermodynamic equilibrium. The surface kinetics of CH4 reactions on Ni, Cu and Cu-Ni surfaces shows good agreement with the experimental results for different growth pressures (0.1 to 0.7 mbar), temperatures (600 to 1200 °C) and different Ni thicknesses (25-500 μm). Also, the model works well when substrates with various C solubilities are used. The thermodynamic and kinetic models described here can be used for the design of improved reactors to optimise the production of graphene with differing qualities, either single or multi-layer and sizes. More importantly, the transfer to a continuous process with a moving substrate should also be possible using the model if it is extended from 2D to 3D.
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Affiliation(s)
- Samir H Al-Hilfi
- School of Applied Sciences, University of Technology, Baghdad, Iraq.
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11
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Roy S, K. J. N, Tiwari N, Tiwari AK. Energetics and dynamics of CH4 and H2O dissociation on metal surfaces. INT REV PHYS CHEM 2020. [DOI: 10.1080/0144235x.2020.1765598] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Sudipta Roy
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
| | - Nayanthara K. J.
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
| | - Nidhi Tiwari
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
| | - Ashwani K. Tiwari
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
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12
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Kwon G, Shin D, Jeong H, Sahoo SK, Lee J, Kim G, Choi J, Kim DH, Han JW, Lee H. Oxidative Methane Conversion to Ethane on Highly Oxidized Pd/CeO 2 Catalysts Below 400 °C. CHEMSUSCHEM 2020; 13:677-681. [PMID: 31896170 DOI: 10.1002/cssc.201903311] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 12/27/2019] [Indexed: 06/10/2023]
Abstract
Methane upgrading into more valuable chemicals has received much attention. Herein, we report oxidative methane conversion to ethane using gaseous O2 at low temperatures (<400 °C) and atmospheric pressure in a continuous reactor. A highly oxidized Pd deposited on ceria could produce ethane with a productivity as high as 0.84 mmol gcat -1 h-1 . The Pd-O-Pd sites, not Pd-O-Ce, were the active sites for the selective ethane production at low temperatures. Density functional theory calculations confirmed that the Pd-O-Pd site is energetically more advantageous for C-C coupling, whereas Pd-O-Ce promotes CH4 dehydrogenation. The ceria helped Pd maintain a highly oxidic state despite reductive CH4 flow. This work can provide new insight for methane upgrading into C2 species.
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Affiliation(s)
- Gihun Kwon
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
| | - Dongjae Shin
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, 37673, South Korea
| | - Hojin Jeong
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
| | - Suman Kalyan Sahoo
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, 37673, South Korea
| | - Jaeha Lee
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, South Korea
| | - Gunjoo Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
| | - Juhyuk Choi
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
| | - Do Heui Kim
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul, 08826, South Korea
| | - Jeong Woo Han
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, 37673, South Korea
| | - Hyunjoo Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
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13
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Gerrits N, Migliorini D, Kroes GJ. Dissociation of CHD3 on Cu(111), Cu(211), and single atom alloys of Cu(111). J Chem Phys 2018; 149:224701. [DOI: 10.1063/1.5053990] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Nick Gerrits
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Davide Migliorini
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Geert-Jan Kroes
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
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14
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Roy G, Chattopadhyay AP. Methane Dissociation on Bimetallic AuNi3
, Au2
Ni2
and Au3
Ni Clusters-A DFT Study. ChemistrySelect 2018. [DOI: 10.1002/slct.201800184] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ghanashyam Roy
- Department of Chemistry; Krishnagar Government College; Krishnagar, West Bengal India
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15
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Che F, Gray JT, Ha S, McEwen JS. Reducing Reaction Temperature, Steam Requirements, and Coke Formation During Methane Steam Reforming Using Electric Fields: A Microkinetic Modeling and Experimental Study. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01587] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | - Jean-Sabin McEwen
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland Washington 99352, United States
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16
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Yuan K, Zhong JQ, Sun S, Ren Y, Zhang JL, Chen W. Reactive Intermediates or Inert Graphene? Temperature- and Pressure-Determined Evolution of Carbon in the CH4–Ni(111) System. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01880] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kaidi Yuan
- National University of Singapore (Suzhou) Research Institute, 377 Linquan Street, Suzhou Industrial
Park, Jiangsu 215123, People’s Republic of China
- Department
of Physics, National University of Singapore, 2 Science Drive 3, 117542 Singapore
| | - Jian-Qiang Zhong
- Center
for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Shuo Sun
- Department
of Physics, National University of Singapore, 2 Science Drive 3, 117542 Singapore
| | - Yinjuan Ren
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
| | - Jia Lin Zhang
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
| | - Wei Chen
- National University of Singapore (Suzhou) Research Institute, 377 Linquan Street, Suzhou Industrial
Park, Jiangsu 215123, People’s Republic of China
- Department
of Physics, National University of Singapore, 2 Science Drive 3, 117542 Singapore
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
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17
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Tu W, Ghoussoub M, Singh CV, Chin YHC. Consequences of Surface Oxophilicity of Ni, Ni-Co, and Co Clusters on Methane Activation. J Am Chem Soc 2017; 139:6928-6945. [DOI: 10.1021/jacs.7b01632] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Weifeng Tu
- Department
of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada
| | - Mireille Ghoussoub
- Department
of Materials Science and Engineering, University of Toronto, Toronto, Ontario M5S 3E4, Canada
| | - Chandra Veer Singh
- Department
of Materials Science and Engineering, University of Toronto, Toronto, Ontario M5S 3E4, Canada
- Department
of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario M5S 3G8, Canada
| | - Ya-Huei Cathy Chin
- Department
of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada
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18
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19
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Carey SJ, Zhao W, Frehner A, Campbell CT, Jackson B. Energetics of Adsorbed Methyl and Methyl Iodide on Ni(111) by Calorimetry: Comparison to Pt(111) and Implications for Catalysis. ACS Catal 2017. [DOI: 10.1021/acscatal.6b02457] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Spencer J. Carey
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Wei Zhao
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Amilla Frehner
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Charles T. Campbell
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Bret Jackson
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, United States
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20
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Zuo ZJ, Peng F, Huang W. Efficient Synthesis of Ethanol from CH 4 and Syngas on a Cu-Co/TiO 2 Catalyst Using a Stepwise Reactor. Sci Rep 2016; 6:34670. [PMID: 27694944 PMCID: PMC5046147 DOI: 10.1038/srep34670] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 09/16/2016] [Indexed: 11/08/2022] Open
Abstract
Ethanol synthesis from CH4 and syngas on a Cu-Co/TiO2 catalyst is studied using experiments, density functional theory (DFT) and microkinetic modelling. The experimental results indicate that the active sites of ethanol synthesis from CH4 and syngas are Cu and CoO, over which the ethanol selectivity is approximately 98.30% in a continuous stepwise reactor. DFT and microkinetic modelling results show that *CH3 is the most abundant species and can be formed from *CH4 dehydrogenation or through the process of *CO hydrogenation. Next, the insertion of *CO into *CH3 forms *CH3CO. Finally, ethanol is formed through *CH3CO and *CH3COH hydrogenation. According to our results, small particles of metallic Cu and CoO as well as a strongly synergistic effect between metallic Cu and CoO are beneficial for ethanol synthesis from CH4 and syngas on a Cu-Co/TiO2 catalyst.
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Affiliation(s)
- Zhi-Jun Zuo
- Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
| | - Fen Peng
- Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
- Key Laboratory of Renewable Energy and Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, China
| | - Wei Huang
- Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
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21
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Zhao ZJ, Chiu CC, Gong J. Molecular understandings on the activation of light hydrocarbons over heterogeneous catalysts. Chem Sci 2015; 6:4403-4425. [PMID: 29142696 PMCID: PMC5665090 DOI: 10.1039/c5sc01227a] [Citation(s) in RCA: 143] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Accepted: 06/12/2015] [Indexed: 12/19/2022] Open
Abstract
Due to the depletion of petroleum and the recent shale gas revolution, the dropping of the price for light alkanes makes alkanes an attractive feedstock for the production of light alkenes and other valuable chemicals. Understanding the mechanism for the activation of C-H bonds in hydrocarbons provides fundamental insights into this process and a guideline for the optimization of catalysts used for the processing of light alkanes. In the last two decades, density functional theory (DFT) has become a powerful tool to explore elementary steps and mechanisms of many heterogeneously catalyzed processes at the atomic scale. This review describes recent progress on computational understanding of heterogeneous catalytic dehydrogenation reactions of light alkanes. We start with a short description on basic concepts and principles of DFT as well as its application in heterogeneous catalysis. The activation of C-H bonds over transition metal and alloy surfaces are then discussed in detail, followed by C-H activation over oxides, zeolites and catalysts with single atoms as active sites. The origins of coking formation are also discussed followed by a perspective on directions of future research.
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Affiliation(s)
- Zhi-Jian Zhao
- Key Laboratory for Green Chemical Technology of Ministry of Education , School of Chemical Engineering and Technology , Tianjin University , Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300072 , China .
| | - Cheng-Chau Chiu
- Department Chemie , Technische Universität München , 85747 Garching , Germany
| | - Jinlong Gong
- Key Laboratory for Green Chemical Technology of Ministry of Education , School of Chemical Engineering and Technology , Tianjin University , Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300072 , China .
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22
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Guo X, Liu H, Wang B, Wang Q, Zhang R. Insight into C + O(OH) reaction for carbon elimination on different types of CoNi(111) surfaces: a DFT study. RSC Adv 2015. [DOI: 10.1039/c4ra15555f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A density-functional theory (DFT) method has been performed to investigate the reaction of C + O(OH) on three types of bimetallic alloy CoNi(111) surface, and the obtained results are compared with those on the pure Ni(111) surface.
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Affiliation(s)
- Xiaoqiang Guo
- Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province
- Taiyuan University of Technology
- Taiyuan 030024
- P.R. China
| | - Hongyan Liu
- College of Chemistry and Environment Engineering
- Shanxi Datong University
- Datong
- P.R. 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
| | - Qiang Wang
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- 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
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23
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Martinez de la Hoz JM, Balbuena PB. Small-Molecule Activation Driven by Confinement Effects. ACS Catal 2014. [DOI: 10.1021/cs5013798] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Julibeth M. Martinez de la Hoz
- Department of Chemical Engineering and Department of Materials Science and Engineering Texas A&M University, College Station, Texas 77843, United States
| | - Perla B. Balbuena
- Department of Chemical Engineering and Department of Materials Science and Engineering Texas A&M University, College Station, Texas 77843, United States
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24
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Hao X, Wang Q, Li D, Zhang R, Wang B. The adsorption and dissociation of methane on cobalt surfaces: thermochemistry and reaction barriers. RSC Adv 2014. [DOI: 10.1039/c4ra04050c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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25
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Fang W, Hsu AL, Song Y, Birdwell AG, Amani M, Dubey M, Dresselhaus MS, Palacios T, Kong J. Asymmetric growth of bilayer graphene on copper enclosures using low-pressure chemical vapor deposition. ACS NANO 2014; 8:6491-6499. [PMID: 24878354 DOI: 10.1021/nn5015177] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this work, we investigated the growth mechanisms of bilayer graphene on the outside surface of Cu enclosures at low pressures. We observed that the asymmetric growth environment of a Cu enclosure can yield a much higher (up to 100%) bilayer coverage on the outside surface as compared to the bilayer growth on a flat Cu foil, where both sides are exposed to the same growth environment. By simultaneously examining the graphene films grown on both the outside and inside surfaces of the Cu enclosure, we find that carbon can diffuse from the inside surface to the outside via exposed copper regions on the inside surface. The kinetics of this process are examined by coupling the asymmetric growth between the two surfaces through a carbon diffusion model. Finally, using these results, we show that the coverage of bilayer graphene can be tuned simply by changing the thickness of the Cu foil, further confirming our model of carbon delivery through the Cu foil.
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Affiliation(s)
- Wenjing Fang
- Department of Electrical Engineering and Computer Sciences and ‡Department of Physics, Massachusetts Institute of Technology , 77 Mass Avenue, Cambridge, Massachusetts 02139, United States
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26
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Bothra P, Pati SK. Improved catalytic activity of rhodium monolayer modified nickel (110) surface for the methane dehydrogenation reaction: a first-principles study. NANOSCALE 2014; 6:6738-6744. [PMID: 24820886 DOI: 10.1039/c3nr06739d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The catalytic activity of pure Ni (110) and single Rh layer deposited Ni (110) surface for the complete dehydrogenation of methane is theoretically investigated by means of gradient-corrected periodic density functional theory. A detailed kinetic study, based on the analysis of the optimal reaction pathway for the transformation of CH4 to C and H through four elementary steps (CH4 → CH3 + H; CH3 → CH2 + H; CH2 → CH + H; CH → C + H) is presented for pure Ni (110) and Rh/Ni (110) surfaces and compared with pure Rh (110) surface. Through systematic examination of adsorbed geometries and transition states, we show that single layer deposition of Rh on Ni (110) surface has a striking influence on lowering the activation energy barrier of the dehydrogenation reaction. Moreover, it is found that a pure Ni (110) surface has a tendency for carbon deposition on the catalytic surface during the methane dissociation reaction which decreases the stability of the catalyst. However, the deposition of carbon is largely suppressed by the addition of a Rh overlayer on the pure Ni (110) surface. The physical origin of stronger chemisorption of carbon on Ni (110) relative to Rh/Ni (110) has been elucidated by getting insight into the electronic structures and d-band model of the catalytic surfaces. Considering the balance in both the catalytic activity as well as the catalyst stability, we propose that the Rh/Ni (110) surface possesses much improved catalytic property compared to pure Ni (110) and pure Rh (110) surfaces.
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Affiliation(s)
- Pallavi Bothra
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, 560064, India.
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27
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Huang Y, Ling C, Jin M, Du J, Zhou T, Wang S. Water adsorption and dissociation on Ni surface: effects of steps, dopants, coverage and self-aggregation. Phys Chem Chem Phys 2014; 15:17804-17. [PMID: 24043156 DOI: 10.1039/c3cp53644k] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Water-metal interaction has been receiving extensive attention due to its interdisciplinary application. In this paper, on the basis of first-principle calculations and slab models, the behavior of water adsorption and dissociation on planar, stepped and blocked Ni surfaces is investigated, the effects of steps, Au and Ag dopants, coverage and self-aggregation of water are also disclosed. The results show that: step not only strengthens water-substrate interaction but also facilitates water dissociation. With dopants modification, the adsorption and dissociation properties remain relatively unchanged at lower coverage (1/9 on facets and 1/12 ML on steps) while at higher coverage (1/4 on facets and 1/6 ML on steps) water adsorption is weakened and dissociation activity decreases dramatically. Water adsorption and dissociation properties on Ni surfaces are essentially unaffected with the increase of coverage. On doped surfaces, adsorption properties and dissociation activities are closely associated with the ligand effect, which is dependent on the dopant, dopant concentration and surface morphology. Water self-aggregation enhances water-surface interaction on all studied surfaces due to hydrogen bond (network) formation. Furthermore, investigation shows that it does not assist water dissociation.
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Affiliation(s)
- Yucheng Huang
- College of Chemistry and Material Science, Anhui Normal University, Beijing east Road 1, Wuhu, 241000, Peoples' Republic of China.
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28
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Che F, Hensley AJ, Ha S, McEwen JS. Decomposition of methyl species on a Ni(211) surface: investigations of the electric field influence. Catal Sci Technol 2014. [DOI: 10.1039/c4cy00406j] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Density functional theory calculations are performed to examine how an external electric field can alter the reaction pathways on a stepped Ni(211) surface with regard to the decomposition of methyl species.
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Affiliation(s)
- Fanglin Che
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering
- Washington State University
- , USA
| | - Alyssa J. Hensley
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering
- Washington State University
- , USA
| | - Su Ha
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering
- Washington State University
- , USA
| | - Jean-Sabin McEwen
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering
- Washington State University
- , USA
- Department of Physics and Astronomy
- Washington State University
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29
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Che F, Zhang R, Hensley AJ, Ha S, McEwen JS. Density functional theory studies of methyl dissociation on a Ni(111) surface in the presence of an external electric field. Phys Chem Chem Phys 2014; 16:2399-410. [DOI: 10.1039/c3cp54135e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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30
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Affiliation(s)
- Roberto Muñoz
- Surfaces & Coatings Dept.; Instituto de Ciencia de Materiales de Madrid CSIC; Madrid 28049 (Spain)
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31
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Ni-Based Catalysts for Low Temperature Methane Steam Reforming: Recent Results on Ni-Au and Comparison with Other Bi-Metallic Systems. Catalysts 2013. [DOI: 10.3390/catal3020563] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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32
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Huang Y, Du J, Ling C, Zhou T, Wang S. Methane dehydrogenation on Au/Ni surface alloys – a first-principles study. Catal Sci Technol 2013. [DOI: 10.1039/c3cy20802h] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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33
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Huang YC, Du JY, Zhou T, Wang SF. First-Principles Study toward CO Adsorption on Au/Ni Surface Alloys. Chemphyschem 2012; 13:3909-15. [DOI: 10.1002/cphc.201200606] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Revised: 09/04/2012] [Indexed: 11/05/2022]
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34
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Fan C, Zhu YA, Xu Y, Zhou Y, Zhou XG, Chen D. Origin of synergistic effect over Ni-based bimetallic surfaces: A density functional theory study. J Chem Phys 2012; 137:014703. [DOI: 10.1063/1.4731811] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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35
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Montemore MM, Medlin JW. A density functional study of C1–C4 alkyl adsorption on Cu(111). J Chem Phys 2012; 136:204710. [DOI: 10.1063/1.4722102] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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36
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Kim H, Mattevi C, Calvo MR, Oberg JC, Artiglia L, Agnoli S, Hirjibehedin CF, Chhowalla M, Saiz E. Activation energy paths for graphene nucleation and growth on Cu. ACS NANO 2012; 6:3614-23. [PMID: 22443380 DOI: 10.1021/nn3008965] [Citation(s) in RCA: 159] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The synthesis of wafer-scale single crystal graphene remains a challenge toward the utilization of its intrinsic properties in electronics. Until now, the large-area chemical vapor deposition of graphene has yielded a polycrystalline material, where grain boundaries are detrimental to its electrical properties. Here, we study the physicochemical mechanisms underlying the nucleation and growth kinetics of graphene on copper, providing new insights necessary for the engineering synthesis of wafer-scale single crystals. Graphene arises from the crystallization of a supersaturated fraction of carbon-adatom species, and its nucleation density is the result of competition between the mobility of the carbon-adatom species and their desorption rate. As the energetics of these phenomena varies with temperature, the nucleation activation energies can span over a wide range (1-3 eV) leading to a rational prediction of the individual nuclei size and density distribution. The growth-limiting step was found to be the attachment of carbon-adatom species to the graphene edges, which was independent of the Cu crystalline orientation.
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Affiliation(s)
- HoKwon Kim
- CASC, Department of Materials, Imperial College London, London SW7 2AZ, UK
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37
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Liu H, Yan R, Zhang R, Wang B, Xie K. A DFT theoretical study of CH4 dissociation on gold-alloyed Ni(111) surface. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/s1003-9953(10)60252-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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38
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Fan C, Zhou XG, Chen D, Cheng HY, Zhu YA. Toward CH4 dissociation and C diffusion during Ni/Fe-catalyzed carbon nanofiber growth: A density functional theory study. J Chem Phys 2011; 134:134704. [DOI: 10.1063/1.3575193] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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39
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Impurity Atoms on Small Transition Metal Clusters. Insights from Density Functional Model Studies. Top Catal 2011. [DOI: 10.1007/s11244-011-9667-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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40
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Losurdo M, Giangregorio MM, Capezzuto P, Bruno G. Graphene CVD growth on copper and nickel: role of hydrogen in kinetics and structure. Phys Chem Chem Phys 2011; 13:20836-43. [DOI: 10.1039/c1cp22347j] [Citation(s) in RCA: 337] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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