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Shi Y. Comparative DFT study of methanol decomposition on Mo 2C(001) and Mo 2C(101) surfaces. J Mol Model 2023; 29:233. [PMID: 37414901 DOI: 10.1007/s00894-023-05631-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 06/21/2023] [Indexed: 07/08/2023]
Abstract
CONTEXT In this study, the complete reaction mechanism of methanol decomposition on metallic Mo2C(001) and Mo/C-mixed Mo2C(101) hexagonal Mo2C crystalline phases was systematically investigated using plane-wave-based periodic density functional theory (DFT). The main reaction route for Mo2C(001) is as follows: CH3OH → CH3O + H → CH2O + 2H → CHO + 3H → CO + 4H → C + O + 4H. Hence, C, O, and H are the main products. It was found that the energy barrier for CO dissociation was low. Therefore, it was concluded that the Mo2C(001) surface was too active to be easily oxidized or carburized. The optimal reaction pathway for Mo2C(101) is as follows: CH3OH → CH3O + H → CH2O + 2H → CH2 + O + 2H → CH3 + O + H → CH4 + O. Therefore, CH4 is the major product. The hydrogenation of CH3 leading to CH4 showed the highest energy barrier and the lowest rate constant and should be the rate-determining step. In addition, the formation of CO + 2H2 was competitive on Mo2C(101), and the optimal path was CH3OH → CH3O + H → CH2O + 2H → CH2 + O + 2H → CH + O + 3H → C + O + 4H → CO + 2H2. The computed energy barrier and rate constant indicate that the rate-determining step is the last step in CO formation. In agreement with the experimental observations, the results provide insights into the Mo2C-catalyzed decomposition of methanol and other side reactions. METHODS All calculations were performed by using the plane-wave based periodic method implemented in Vienna ab initio simulation package (VASP, version 5.3.5), where the ionic cores are described by the projector augmented wave (PAW) method. The exchange and correlation energies were computed using the Perdew, Burke and Ernzerhof functional with the latest dispersion correction (PBE-D3).
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Affiliation(s)
- Yun Shi
- School of Chemistry & Chemical Engineering, Linyi University, Linyi, 276000, China.
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2
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Lin Z, Ammal SC, Denny SR, Rykov SA, You KE, Heyden A, Chen JG. Unraveling Unique Surface Chemistry of Transition Metal Nitrides in Controlling Selective C-O Bond Scission Pathways of Glycerol. JACS AU 2022; 2:367-379. [PMID: 35252987 PMCID: PMC8889611 DOI: 10.1021/jacsau.1c00403] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Indexed: 05/24/2023]
Abstract
Controlled C-O bond scission is an important step for upgrading glycerol, a major byproduct from the continuously increasing biodiesel production. Transition metal nitride catalysts have been identified as promising hydrodeoxygenation (HDO) catalysts, but fundamental understanding regarding the active sites of the catalysts and reaction mechanism remains unclear. This work demonstrates a fundamental surface science study of Mo2N and Cu/Mo2N for the selective HDO reaction of glycerol, using a combination of model surface experiments and first-principles calculations. Temperature-programmed desorption (TPD) experiments showed that clean Mo2N cleaved two or three C-O bonds of glycerol to produce allyl alcohol, propanal, and propylene. The addition of Cu to Mo2N changed the reaction pathway to one C-O bond scission to produce acetol. High-resolution electron energy loss spectroscopy (HREELS) results identified the surface intermediates, showing a facile C-H bond activation on Mo2N. Density functional theory (DFT) calculations revealed that the surface N on Mo2N interacted with the H atoms in glycerol and blocked some Mo sites to enable selective C-O bond scission. This work shows that Mo2N and Cu/Mo2N are active and selective for the controlled C-O bond scission of glycerol and in turn provides insights into the rational catalyst design for selective oxygen removal of relevant biomass-derived oxygenates.
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Affiliation(s)
- Zhexi Lin
- Department
of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Salai C. Ammal
- Department
of Chemical Engineering, University of South
Carolina, Columbia, South Carolina 29208, United States
| | - Steven R. Denny
- Department
of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Sergei A. Rykov
- Department
of Semiconductors Physics and Nano-electronics, Peter the Great St. Petersburg Polytechnic University 195251 St. Petersburg, Russia
| | - Kyung-Eun You
- Department
of Chemical Engineering, University of South
Carolina, Columbia, South Carolina 29208, United States
| | - Andreas Heyden
- Department
of Chemical Engineering, University of South
Carolina, Columbia, South Carolina 29208, United States
| | - Jingguang G. Chen
- Department
of Chemical Engineering, Columbia University, New York, New York 10027, United States
- Chemistry
Division, Brookhaven National Laboratory, Upton, New York 11973, United States
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3
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Chen Y, Zhai Z, Liu J, Zhang J, Geng Z, Lyu H. Exploring the reaction mechanism of ethanol synthesis from acetic acid over a Ni 2In(100) surface. Phys Chem Chem Phys 2020; 22:7564-7576. [DOI: 10.1039/d0cp00241k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Incremental insights on the mechanism of ethanol synthesis from acetic acid and the unique effect on the inhibition of C–C bond breaking on the Ni2In(100) surface.
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Affiliation(s)
- Yifei Chen
- Key Laboratory for Green Chemical Technology of Ministry of Education
- R&D Center for Petrochemical Technology
- Tianjin University
- Tianjin 300072
- China
| | - Ziwei Zhai
- Key Laboratory for Green Chemical Technology of Ministry of Education
- R&D Center for Petrochemical Technology
- Tianjin University
- Tianjin 300072
- China
| | - Jiatao Liu
- Key Laboratory for Green Chemical Technology of Ministry of Education
- R&D Center for Petrochemical Technology
- Tianjin University
- Tianjin 300072
- China
| | - Jia Zhang
- Key Laboratory for Green Chemical Technology of Ministry of Education
- R&D Center for Petrochemical Technology
- Tianjin University
- Tianjin 300072
- China
| | - Zhongfeng Geng
- Key Laboratory for Green Chemical Technology of Ministry of Education
- R&D Center for Petrochemical Technology
- Tianjin University
- Tianjin 300072
- China
| | - Huisheng Lyu
- Key Laboratory for Green Chemical Technology of Ministry of Education
- R&D Center for Petrochemical Technology
- Tianjin University
- Tianjin 300072
- China
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4
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Hao Z, Han Y, Guo S, Zhang Q, Guo L. A Comparative Study on C2 Hydrocarbons and Methanol Synthesis from CO Hydrogenation Catalyzed by M1/W6S8 (M = Ir and Ca) Single-Atom Catalysts. Catal Letters 2019. [DOI: 10.1007/s10562-019-03007-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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5
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CO hydrogenation on M1/W6S8 (M = Co and Ni) single-atom catalysts: Competition between C2 hydrocarbons and methanol synthesis pathways. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2018.12.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Wan W, Ammal SC, Lin Z, You KE, Heyden A, Chen JG. Controlling reaction pathways of selective C-O bond cleavage of glycerol. Nat Commun 2018; 9:4612. [PMID: 30397199 PMCID: PMC6218480 DOI: 10.1038/s41467-018-07047-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Accepted: 10/12/2018] [Indexed: 11/08/2022] Open
Abstract
The selective hydrodeoxygenation (HDO) reaction is desirable to convert glycerol into various value-added products by breaking different numbers of C-O bonds while maintaining C-C bonds. Here we combine experimental and density functional theory (DFT) results to reveal that the Cu modifier can significantly reduce the oxophilicity of the molybdenum carbide (Mo2C) surface and change the product distribution. The Mo2C surface is active for breaking all C-O bonds to produce propylene. As the Cu coverage increases to 0.5 monolayer (ML), the Cu/Mo2C surface shows activity towards breaking two C-O bonds and forming ally-alcohol and propanal. As the Cu coverage further increases, the Cu/Mo2C surface cleaves one C-O bond to form acetol. DFT calculations reveal that the Mo2C surface, Cu-Mo interface, and Cu surface are distinct sites for the production of propylene, ally-alcohol, and acetol, respectively. This study explores the feasibility of tuning the glycerol HDO selectivity by modifying the surface oxophilicity.
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Affiliation(s)
- Weiming Wan
- Department of Chemical Engineering, Columbia University, New York, NY, 10027, USA
| | - Salai C Ammal
- Department of Chemical Engineering, University of South Carolina, Columbia, SC, 29208, USA
| | - Zhexi Lin
- Department of Chemical Engineering, Columbia University, New York, NY, 10027, USA
| | - Kyung-Eun You
- Department of Chemical Engineering, University of South Carolina, Columbia, SC, 29208, USA
| | - Andreas Heyden
- Department of Chemical Engineering, University of South Carolina, Columbia, SC, 29208, USA.
| | - Jingguang G Chen
- Department of Chemical Engineering, Columbia University, New York, NY, 10027, USA.
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Zhang Q, Guo L, Zheng X, Xing M, Hao Z. Insight into the reaction mechanism of ethanol steam reforming catalysed by Co–Mo6S8. Mol Phys 2018. [DOI: 10.1080/00268976.2018.1521011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Qian Zhang
- Key Laboratory of Magnetic Molecules & Magnetic Information Materials Ministry of Education, Shanxi Normal University, Linfen, People’s Republic of China
- The School of Chemical and Material Science, Shanxi Normal University, Linfen, People’s Republic of China
| | - Ling Guo
- Key Laboratory of Magnetic Molecules & Magnetic Information Materials Ministry of Education, Shanxi Normal University, Linfen, People’s Republic of China
- The School of Chemical and Material Science, Shanxi Normal University, Linfen, People’s Republic of China
| | - Xiaoli Zheng
- Key Laboratory of Magnetic Molecules & Magnetic Information Materials Ministry of Education, Shanxi Normal University, Linfen, People’s Republic of China
- The School of Chemical and Material Science, Shanxi Normal University, Linfen, People’s Republic of China
| | - Minmin Xing
- Key Laboratory of Magnetic Molecules & Magnetic Information Materials Ministry of Education, Shanxi Normal University, Linfen, People’s Republic of China
- The School of Chemical and Material Science, Shanxi Normal University, Linfen, People’s Republic of China
| | - Zijun Hao
- Key Laboratory of Magnetic Molecules & Magnetic Information Materials Ministry of Education, Shanxi Normal University, Linfen, People’s Republic of China
- The School of Chemical and Material Science, Shanxi Normal University, Linfen, People’s Republic of China
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9
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Xu H, Miao B, Zhang M, Chen Y, Wang L. Mechanism of C-C and C-H bond cleavage in ethanol oxidation reaction on Cu 2O(111): a DFT-D and DFT+U study. Phys Chem Chem Phys 2018; 19:26210-26220. [PMID: 28932852 DOI: 10.1039/c7cp04630h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The performance of transition metal catalysts for ethanol oxidation reaction (EOR) in direct ethanol fuel cells (DEFCs) may be greatly affected by their oxidation. However, the specific effect and catalytic mechanism for EOR of transition metal oxides are still unclear and deserve in-depth exploitation. Copper as a potential anode catalyst can be easily oxidized in air. Thus, in this study, we investigated C-C and C-H bond cleavage reactions of CHxCO (x = 1, 2, 3) species in EOR on Cu2O(111) using PBE+U calculations, as well as the specific effect of +U correction on the process of adsorption and reaction on Cu2O(111). It was revealed that the catalytic performance of Cu2O(111) for EOR was restrained compared with that of Cu(100). Except for the C-H cleavage of CH2CO, all the reaction barriers for C-C and C-H cleavage were higher than those on Cu(100). The most probable pathway for CH3CO to CHCO on Cu2O(111) was the continuous dehydrogenation reaction. Besides, the barrier for C-C bond cleavage increased due to the loss of H atoms in the intermediate. Moreover, by the comparison of the traditional GGA/PBE method and the PBE+U method, it could be concluded that C-C cleavage barriers would be underestimated without +U correction, while C-H cleavage barriers would be overestimated. +U correction was proved to be necessary, and the reaction barriers and the values of the Hubbard U parameter had a proper linear relationship.
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Affiliation(s)
- Han Xu
- Key Laboratory of Ministry of Education for Green Chemical Technology and the R & D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China.
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10
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Wan F, Chao S, Guan Q, Wang GC, Li W. Reaction mechanisms of acetylene hydrochlorination catalyzed by AuCl3/C catalysts: A density functional study. CATAL COMMUN 2017. [DOI: 10.1016/j.catcom.2017.07.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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11
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Wu Z, Zhang M, Jiang H, Zhong CJ, Chen Y, Wang L. Competitive C-C and C-H bond scission in the ethanol oxidation reaction on Cu(100) and the effect of an alkaline environment. Phys Chem Chem Phys 2017; 19:15444-15453. [PMID: 28580983 DOI: 10.1039/c7cp01445g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Direct ethanol fuel cell technology is impeded by inefficient, yet expensive anode catalysts. As such, research on effective and cheap anode catalysts towards complete ethanol oxidation reaction (EOR) is greatly needed. Herein, we report the investigations of the competitive C-C and C-H bond scissions in the EOR involving CH3CO, CH2CO, and CHCO species on Cu(100) using density functional theory and transition state theory calculations. The easiest C-C bond cleavage was found in CH2CO while the most difficult C-H bond cleavage was also found in CH2CO, both with an activation energy of 1.02 eV. The feasible C-C bond scission may take place in CH2CO with a rate constant ratio of the C-C to the C-H bond scission at 100 °C of 0.32. Furthermore, in an alkaline environment, the C-H bond scission activation barrier is considerably lowered but the C-C bond cleavage activation barrier is slightly increased for both CH3CO and CH2CO species. The reaction of CH3CO species on Cu(100) under alkaline conditions produces mainly acetic acid with a barrier of 0.49 eV and a rate constant of 4.93 × 105 s-1 at 100 °C.
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Affiliation(s)
- Zhipeng Wu
- Key Laboratory of Ministry of Education for Green Chemical Technology and the R & D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China.
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12
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Alloying effect via comparative studies of ethanol dehydrogenation on Cu(1 1 1), Cu 3 Pd(1 1 1), and Cu 3 Pt(1 1 1). Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.04.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Li MR, Wang GC. Differentiation of the C–O and C–C bond scission mechanisms of 1-hexadecanol on Pt(111) and Ru(0001): a first principles analysis. Catal Sci Technol 2017. [DOI: 10.1039/c6cy02529c] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The major product on Pt(111) is hexadecane, whereas it is pentadecane on Ru(0001).
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Affiliation(s)
- Meng-Ru Li
- Department of Chemistry
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
- P. R. China
| | - Gui-Chang Wang
- Department of Chemistry
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
- P. R. China
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14
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Li MR, Lu Z, Wang GC. The effect of potassium on steam-methane reforming on the Ni4/Al2O3 surface: a DFT study. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00986k] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Steam-methane reforming is a method of converting natural gas to syngas, and the additive K could affect the activity of steam-methane reforming on Ni catalyst supported by Al2O3.
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Affiliation(s)
- Meng-Ru Li
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
- and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Zhe Lu
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
- and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Gui-Chang Wang
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
- and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- College of Chemistry
- Nankai University
- Tianjin 300071
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16
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Yu W, Salciccioli M, Xiong K, Barteau MA, Vlachos DG, Chen JG. Theoretical and Experimental Studies of C–C versus C–O Bond Scission of Ethylene Glycol Reaction Pathways via Metal-Modified Molybdenum Carbides. ACS Catal 2014. [DOI: 10.1021/cs500124n] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Weiting Yu
- Catalysis
Center for Energy Innovation (CCEI), Department of Chemical and Biomolecular
Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Michael Salciccioli
- Catalysis
Center for Energy Innovation (CCEI), Department of Chemical and Biomolecular
Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Ke Xiong
- Catalysis
Center for Energy Innovation (CCEI), Department of Chemical and Biomolecular
Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Mark A. Barteau
- Catalysis
Center for Energy Innovation (CCEI), Department of Chemical and Biomolecular
Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Dionisios G. Vlachos
- Catalysis
Center for Energy Innovation (CCEI), Department of Chemical and Biomolecular
Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Jingguang G. Chen
- Department
of Chemical Engineering, Columbia University, New York, New York 10027, United States
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Khazaei M, Arai M, Sasaki T, Estili M, Sakka Y. The effect of the interlayer element on the exfoliation of layered Mo 2AC (A = Al, Si, P, Ga, Ge, As or In) MAX phases into two-dimensional Mo 2C nanosheets. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2014; 15:014208. [PMID: 27877635 PMCID: PMC5090596 DOI: 10.1088/1468-6996/15/1/014208] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 02/10/2014] [Accepted: 01/19/2014] [Indexed: 05/30/2023]
Abstract
The experimental exfoliation of layered, ternary transition-metal carbide and nitride compounds, known as MAX phases, into two-dimensional (2D) nanosheets, is a great development in the synthesis of novel low-dimensional inorganic systems. Among the MAX phases, Mo-containing ones might be considered as the source for obtaining Mo2C nanosheets with potentially unique properties, if they could be exfoliated. Here, by using a set of first-principles calculations, we discuss the effect of the interlayer 'A' element on the exfoliation of Mo2AC (A = Al, Si, P, Ga, Ge, As or In) MAX phases into the 2D Mo2C nanosheets. Based on the calculated exfoliation energies and the elastic constants, we propose that Mo2InC with the lowest exfoliation energy and the highest elastic constant anisotropy between C11 and C33 might be a suitable compound for exfoliation into 2D Mo2C nanosheets.
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Affiliation(s)
- Mohammad Khazaei
- Computational Materials Science Unit, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, 305-0044, Ibaraki, Japan
| | - Masao Arai
- Computational Materials Science Unit, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, 305-0044, Ibaraki, Japan
| | - Taizo Sasaki
- Computational Materials Science Unit, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, 305-0047, Ibaraki, Japan
| | - Mehdi Estili
- International Center for Young Scientists (ICYS), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, 305-0047, Ibaraki, Japan
| | - Yoshio Sakka
- Materials Processing Unit, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, 305-0047, Ibaraki, Japan
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