1
|
Zhao J, Yin LF, Ling LX, Zhang RG, Fan MH, Wang BJ. A predicted new catalyst to replace noble metal Pd for CO oxidative coupling to DMO. Catal Sci Technol 2022. [DOI: 10.1039/d1cy01631h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction mechanisms of CO oxidative coupling to dimethyl oxalate (DMO) on different β-Mo2C(001) based catalysts have been studied by the density functional theory (DFT) method.
Collapse
Affiliation(s)
- Juan Zhao
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, P. R. China
| | - Li-Fei Yin
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, P. R. China
| | - Li-Xia Ling
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, P. R. China
- Department of Chemical and Petroleum Engineering, University of Wyoming, 1000 E University Ave, Laramie, WY 82071, USA
| | - Ri-Guang Zhang
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, Shanxi, P. R. China
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, Shanxi, P. R. China
| | - Mao-Hong Fan
- Department of Chemical and Petroleum Engineering, University of Wyoming, 1000 E University Ave, Laramie, WY 82071, USA
| | - Bao-Jun Wang
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, Shanxi, P. R. China
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, Shanxi, P. R. China
| |
Collapse
|
2
|
Morales‐García Á, Viñes F, Gomes JRB, Illas F. Concepts, models, and methods in computational heterogeneous catalysis illustrated through
CO
2
conversion. WIRES COMPUTATIONAL MOLECULAR SCIENCE 2021. [DOI: 10.1002/wcms.1530] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ángel Morales‐García
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB) Universitat de Barcelona Barcelona Spain
| | - Francesc Viñes
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB) Universitat de Barcelona Barcelona Spain
| | - José R. B. Gomes
- CICECO—Aveiro Institute of Materials, Department of Chemistry University of Aveiro Aveiro Portugal
| | - Francesc Illas
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB) Universitat de Barcelona Barcelona Spain
| |
Collapse
|
3
|
Simple Synthesis of Molybdenum Carbides from Molybdenum Blue Nanoparticles. NANOMATERIALS 2021; 11:nano11040873. [PMID: 33808113 PMCID: PMC8066837 DOI: 10.3390/nano11040873] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 03/26/2021] [Accepted: 03/29/2021] [Indexed: 11/17/2022]
Abstract
In recent years, much attention has been paid to the development of a new flexible and variable method for molybdenum carbide (Mo2C) synthesis. This work reports the applicability of nano-size clusters of molybdenum blue to molybdenum carbide production by thermal treatment of molybdenum blue xerogels in an inert atmosphere. The method developed made it possible to vary the type (glucose, hydroquinone) and content of the organic reducing agent (molar ratio R/Mo). The effect of these parameters on the phase composition and specific surface area of molybdenum carbides and their catalytic activity was investigated. TEM, UV–VIS spectroscopy, DTA, SEM, XRD, and nitrogen adsorption were performed to characterize nanoparticles and molybdenum carbide. The results showed that, depending on the synthesis conditions, variants of molybdenum carbide can be formed: α-Mo2C, η-MoC, or γ-MoC. The synthesized samples had a high specific surface area (7.1–203.0 m2/g) and meso- and microporosity. The samples also showed high catalytic activity during the dry reforming of methane. The proposed synthesis method is simple and variable and can be successfully used to obtain both Mo2C-based powder and supports catalysts.
Collapse
|
4
|
Chu C, Liu X, Wu C, Li J, Liu K. Surface phase structures responsible for the activity and deactivation of the fcc MoC (111)-Mo surface in steam reforming: a systematic kinetic and thermodynamic investigation. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02269a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multiscale investigation on MoC surface phase evolution to clarify surface structures responsible for reactivity and deactivation in steam reforming.
Collapse
Affiliation(s)
- Changqing Chu
- Academy for Advanced Interdisciplinary Studies
- Southern University of Science and Technology
- Shenzhen 518055
- China
| | - Xue Liu
- Department of Chemistry
- Southern University of Science and Technology
- Shenzhen 518055
- China
| | - Changning Wu
- Academy for Advanced Interdisciplinary Studies
- Southern University of Science and Technology
- Shenzhen 518055
- China
| | - Junguo Li
- Academy for Advanced Interdisciplinary Studies
- Southern University of Science and Technology
- Shenzhen 518055
- China
| | - Ke Liu
- Academy for Advanced Interdisciplinary Studies
- Southern University of Science and Technology
- Shenzhen 518055
- China
- Department of Chemistry
| |
Collapse
|
5
|
Gavrilova N, Dyakonov V, Myachina M, Nazarov V, Skudin V. Synthesis of Mo 2C by Thermal Decomposition of Molybdenum Blue Nanoparticles. NANOMATERIALS 2020; 10:nano10102053. [PMID: 33081415 PMCID: PMC7602951 DOI: 10.3390/nano10102053] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 10/10/2020] [Accepted: 10/15/2020] [Indexed: 01/19/2023]
Abstract
In recent years, the development of methods for the synthesis of Mo2C for catalytic application has become especially important. In this work a series of Mo2C samples was synthesized by thermal decomposition of molybdenum blue xerogels obtained using ascorbic acid. The influence of the molar ratio reducing agent/Mo [R]/[Mo] on morphology, phase composition and characteristics of the porous structure of Mo2C has been established. The developed synthesis method allows the synthesis to be carried out in an inert atmosphere and does not require a carburization step. The resulting molybdenum carbide has a mesoporous structure with a narrow pore size distribution and a predominant pore size of 4 nm.
Collapse
Affiliation(s)
- Natalia Gavrilova
- Department of Colloid Chemistry, Faculty of Natural Sciences, D. Mendeleev University of Chemical Technology of Russia, Miusskaya sq., 9, 125047 Moscow, Russia; (M.M.); (V.N.)
- Correspondence:
| | | | - Maria Myachina
- Department of Colloid Chemistry, Faculty of Natural Sciences, D. Mendeleev University of Chemical Technology of Russia, Miusskaya sq., 9, 125047 Moscow, Russia; (M.M.); (V.N.)
| | - Victor Nazarov
- Department of Colloid Chemistry, Faculty of Natural Sciences, D. Mendeleev University of Chemical Technology of Russia, Miusskaya sq., 9, 125047 Moscow, Russia; (M.M.); (V.N.)
| | - Valery Skudin
- Department of Chemical Technology of Carbon Materials, Faculty of Petroleum Chemistry and Polymers, D. Mendeleev University of Chemical Technology of Russia, Miusskaya sq., 9, 125047 Moscow, Russia;
| |
Collapse
|
6
|
Fang Z, Wang LC, Wang Y, Sikorski E, Tan S, Li-Oakey KD, Li L, Yablonsky G, Dixon DA, Fushimi R. Pt-Assisted Carbon Remediation of Mo 2C Materials for CO Disproportionation. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05225] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Zongtang Fang
- Biological and Chemical Science and Technology, Idaho National Laboratory, Idaho Falls, Idaho 83401, United States
| | - Lu-Cun Wang
- Biological and Chemical Science and Technology, Idaho National Laboratory, Idaho Falls, Idaho 83401, United States
| | - Yixiao Wang
- Biological and Chemical Science and Technology, Idaho National Laboratory, Idaho Falls, Idaho 83401, United States
| | - Ember Sikorski
- Micron School of Materials Science and Engineering, Boise State University, Boise, Idaho 83725, United States
- Center for Advanced Energy Studies, Idaho Falls, Idaho 83401, United States
| | - Shuai Tan
- Center for Advanced Energy Studies, Idaho Falls, Idaho 83401, United States
- Department of Chemical Engineering, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Katie Dongmei Li-Oakey
- Center for Advanced Energy Studies, Idaho Falls, Idaho 83401, United States
- Department of Chemical Engineering, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Lan Li
- Micron School of Materials Science and Engineering, Boise State University, Boise, Idaho 83725, United States
- Center for Advanced Energy Studies, Idaho Falls, Idaho 83401, United States
| | - Gregory Yablonsky
- Department of Energy, Environment and Chemical Engineering, Washington University in Saint Louis, Saint Louis, Missouri 63103, United States
| | - David A. Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Rebecca Fushimi
- Biological and Chemical Science and Technology, Idaho National Laboratory, Idaho Falls, Idaho 83401, United States
| |
Collapse
|
7
|
Wan W, Tackett BM, Chen JG. Reactions of water and C1 molecules on carbide and metal-modified carbide surfaces. Chem Soc Rev 2018; 46:1807-1823. [PMID: 28229154 DOI: 10.1039/c6cs00862c] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The formation of carbides can significantly modify the physical and chemical properties of the parent metals. In the current review, we summarize the general trends in the reactions of water and C1 molecules over transition metal carbide (TMC) and metal-modified TMC surfaces and thin films. Although the primary focus of the current review is on the theoretical and experimental studies of reactions of C1 molecules (CO, CO2, CH3OH, etc.), the reactions of water will also be reviewed because water plays an important role in many of the C1 transformation reactions. This review is organized by discussing separately thermal reactions and electrochemical reactions, which provides insights into the application of TMCs in heterogeneous catalysis and electrocatalysis, respectively. In thermal reactions, we discuss the thermal decomposition of water and methanol, as well as the reactions of CO and CO2 over TMC surfaces. In electrochemical reactions, we summarize recent studies in the hydrogen evolution reaction, electrooxidation of methanol and CO, and electroreduction of CO2. Finally, future research opportunities and challenges associated with using TMCs as catalysts and electrocatalysts are also discussed.
Collapse
Affiliation(s)
- Weiming Wan
- Department of Chemical Engineering, Columbia University, New York, NY 10027, USA.
| | - Brian M Tackett
- Department of Chemical Engineering, Columbia University, New York, NY 10027, USA.
| | - Jingguang G Chen
- Department of Chemical Engineering, Columbia University, New York, NY 10027, USA. and Chemistry Department, Brookhaven National Laboratory, Upton, NY 11973, USA
| |
Collapse
|
8
|
Fan M, Zheng Y, Li A, Ma Y, Huo Q, Qiao ZA, Dai S. Sprout-like Growth of Mesoporous Mo2
C/NC Nanonetworks as Efficient Electrocatalysts for Hydrogen Evolution. ChemCatChem 2018. [DOI: 10.1002/cctc.201701417] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Meihong Fan
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Joint Research Laboratory of Nano-Micro Architecture, Chemistry, College of Chemistry; Jilin University; 2699 Qianjin Street Changchun 130012 P.R. China
| | - Yuenan Zheng
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Joint Research Laboratory of Nano-Micro Architecture, Chemistry, College of Chemistry; Jilin University; 2699 Qianjin Street Changchun 130012 P.R. China
| | - Ang Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Joint Research Laboratory of Nano-Micro Architecture, Chemistry, College of Chemistry; Jilin University; 2699 Qianjin Street Changchun 130012 P.R. China
| | - Yali Ma
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Joint Research Laboratory of Nano-Micro Architecture, Chemistry, College of Chemistry; Jilin University; 2699 Qianjin Street Changchun 130012 P.R. China
| | - Qisheng Huo
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Joint Research Laboratory of Nano-Micro Architecture, Chemistry, College of Chemistry; Jilin University; 2699 Qianjin Street Changchun 130012 P.R. China
| | - Zhen-An Qiao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Joint Research Laboratory of Nano-Micro Architecture, Chemistry, College of Chemistry; Jilin University; 2699 Qianjin Street Changchun 130012 P.R. China
| | - Sheng Dai
- Chemical Sciences Division; Oak Ridge National Laboratory; Oak Ridge TN 37831 USA
| |
Collapse
|
9
|
Demirtas M, Ustunel H, Toffoli D. Effect of Platinum, Gold, and Potassium Additives on the Surface Chemistry of CdI 2-Antitype Mo 2C. ACS OMEGA 2017; 2:7976-7984. [PMID: 31457348 PMCID: PMC6645302 DOI: 10.1021/acsomega.7b01044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 11/03/2017] [Indexed: 06/10/2023]
Abstract
Transition metal carbides are versatile materials for diverse industrial applications including catalysis, where their relatively low cost is very attractive. In this work, we present a rather extensive density functional theory study on the energetics of adsorption of a selection of atomic and molecular species on two Mo terminations of the CdI2 antitype phase of Mo2C. Moreover, the coadsorption of CO in the presence of preadsorbed metal atoms and its dissociative adsorption in the absence and presence of preadsorbed Pt and K were investigated. By using CO as a probe to understand the structural/electronic effects of the preadsorption of the metal atoms on the Mo2C(001) surface, we showed that K further enhances CO adsorption/activation on the surface, in contrast to the precious metals considered. Moreover, it was observed that the presence of both Pt and K stabilizes the transition state for the C-O bond dissociation, lowering the activation barrier for the dissociation of the C-O bond by about 0.3 and 0.4 eV, respectively.
Collapse
Affiliation(s)
- Merve Demirtas
- Department
of Physics, Middle East Technical University, Dumlupinar Bulvari 1, 06800 Ankara, Turkey
| | - Hande Ustunel
- Department
of Physics, Middle East Technical University, Dumlupinar Bulvari 1, 06800 Ankara, Turkey
| | - Daniele Toffoli
- Dipartimento
di Scienze Chimiche e Farmaceutiche, Università
degli Studi di Trieste, Via L. Giorgieri 1, I-34127 Trieste, Italy
| |
Collapse
|
10
|
Theoretical and experimental study of ethanol adsorption and dissociation on β-Mo2C surfaces. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.07.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
11
|
Liu X, Kunkel C, Ramírez de la Piscina P, Homs N, Viñes F, Illas F. Effective and Highly Selective CO Generation from CO2 Using a Polycrystalline α-Mo2C Catalyst. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00735] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Xianyun Liu
- Departament de Química Inorgànica i Orgànica, secció de Química Inorgànica, & Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain
- Catalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre 1, 08930 Barcelona, Spain
| | - Christian Kunkel
- Departament de Ciència de Materials i Química Fisica & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Martí i Franqués 1, 08028 Barcelona, Spain
| | - Pilar Ramírez de la Piscina
- Departament de Química Inorgànica i Orgànica, secció de Química Inorgànica, & Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain
| | - Narcís Homs
- Departament de Química Inorgànica i Orgànica, secció de Química Inorgànica, & Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain
- Catalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre 1, 08930 Barcelona, Spain
| | - Francesc Viñes
- Departament de Ciència de Materials i Química Fisica & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Martí i Franqués 1, 08028 Barcelona, Spain
| | - Francesc Illas
- Departament de Ciència de Materials i Química Fisica & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Martí i Franqués 1, 08028 Barcelona, Spain
| |
Collapse
|
12
|
Chen CJ, Bhan A. Mo2C Modification by CO2, H2O, and O2: Effects of Oxygen Content and Oxygen Source on Rates and Selectivity of m-Cresol Hydrodeoxygenation. ACS Catal 2017. [DOI: 10.1021/acscatal.6b02762] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cha-Jung Chen
- Department of Chemical Engineering
and Materials Science, University of Minnesota−Twin Cities, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
| | - Aditya Bhan
- Department of Chemical Engineering
and Materials Science, University of Minnesota−Twin Cities, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
| |
Collapse
|
13
|
Tian X, Wang T, Jiao H. Oxidation of the hexagonal Mo2C(101) surface by H2O dissociative adsorption. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00728k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Oxidation of the hexagonal Mo2C(101) surface by H2O dissociative adsorption was investigated using periodic density functional theory.
Collapse
Affiliation(s)
- Xinxin Tian
- Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province
- Institute of Molecular Science
- Shanxi University
- Taiyuan 030006
- China
| | - Tao Wang
- Laboratoire de Chimie
- Université Claude Bernard Lyon 1
- CNRS UMR 5182
- Ens de Lyon
- Univ Lyon
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| |
Collapse
|
14
|
Sullivan MM, Chen CJ, Bhan A. Catalytic deoxygenation on transition metal carbide catalysts. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01665g] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We highlight the evolution and tunability of catalytic function of transition metal carbides under oxidative and reductive environments for selective deoxygenation reactions.
Collapse
Affiliation(s)
- Mark M. Sullivan
- Department of Chemical Engineering and Materials Science
- University of Minnesota - Twin Cities
- Minneapolis
- USA
| | - Cha-Jung Chen
- Department of Chemical Engineering and Materials Science
- University of Minnesota - Twin Cities
- Minneapolis
- USA
| | - Aditya Bhan
- Department of Chemical Engineering and Materials Science
- University of Minnesota - Twin Cities
- Minneapolis
- USA
| |
Collapse
|
15
|
Sabnis KD, Cui Y, Akatay MC, Shekhar M, Lee WS, Miller JT, Delgass WN, Ribeiro FH. Water–gas shift catalysis over transition metals supported on molybdenum carbide. J Catal 2015. [DOI: 10.1016/j.jcat.2015.08.017] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
16
|
Posada-Pérez S, Viñes F, Rodríguez JA, Illas F. Structure and electronic properties of Cu nanoclusters supported on Mo2C(001) and MoC(001) surfaces. J Chem Phys 2015; 143:114704. [DOI: 10.1063/1.4930538] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Affiliation(s)
- Sergio Posada-Pérez
- Departament de Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/ Martí i Franquès 1, 08028 Barcelona, Spain
| | - Francesc Viñes
- Departament de Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/ Martí i Franquès 1, 08028 Barcelona, Spain
| | - José A. Rodríguez
- Chemistry Department, Brookhaven National Laboratory, Bldg. 555, Upton, New York 11973, USA
| | - Francesc Illas
- Departament de Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/ Martí i Franquès 1, 08028 Barcelona, Spain
| |
Collapse
|
17
|
Li L, Sholl DS. Computational Identification of Descriptors for Selectivity in Syngas Reactions on a Mo2C Catalyst. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00419] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Liwei Li
- School
of Chemical and Biomolecular
Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0100, United States
| | - David S. Sholl
- School
of Chemical and Biomolecular
Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0100, United States
| |
Collapse
|
18
|
Wang T, Tian X, Yang Y, Li YW, Wang J, Beller M, Jiao H. Coverage dependent adsorption and co-adsorption of CO and H2 on the CdI2-antitype metallic Mo2C(001) surface. Phys Chem Chem Phys 2015; 17:1907-17. [DOI: 10.1039/c4cp04331f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The adsorption and co-adsorption of CO and H2 at different coverage on the CdI2-antitype metallic Mo2C(001) surface termination have been systematically computed at the level of periodic density functional theory.
Collapse
Affiliation(s)
- Tao Wang
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - Xinxin Tian
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan
- PR China
| | - Yong Yang
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan
- PR China
| | - Yong-Wang Li
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan
- PR China
| | - Jianguo Wang
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan
- PR China
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
| |
Collapse
|
19
|
Posada-Pérez S, dos Santos Politi JR, Viñes F, Illas F. Methane capture at room temperature: adsorption on cubic δ-MoC and orthorhombic β-Mo2C molybdenum carbide (001) surfaces. RSC Adv 2015. [DOI: 10.1039/c4ra17225f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
By means of an surrealistic picture, one can see the most prominent result in this paper; the capacity of δ-MoC(001) surface to sequester methane molecule at room temperature.
Collapse
Affiliation(s)
- Sergio Posada-Pérez
- Departament de Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | | | - Francesc Viñes
- Departament de Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Francesc Illas
- Departament de Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| |
Collapse
|
20
|
|
21
|
Shou H, Davis RJ. Multi-product steady-state isotopic transient kinetic analysis of CO hydrogenation over supported molybdenum carbide. J Catal 2013. [DOI: 10.1016/j.jcat.2013.06.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
22
|
Xing SK, Wang GC. Reaction mechanism of ethanol decomposition on Mo2C(100) investigated by the first principles study. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcata.2013.05.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
23
|
Shou H, Li L, Ferrari D, Sholl DS, Davis RJ. Use of infrared spectroscopy and density functional theory to study the influence of rubidium on alumina-supported molybdenum carbide catalyst for higher alcohol synthesis from syngas. J Catal 2013. [DOI: 10.1016/j.jcat.2012.12.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
24
|
Medford AJ, Vojvodic A, Studt F, Abild-Pedersen F, Nørskov JK. Elementary steps of syngas reactions on Mo2C(001): Adsorption thermochemistry and bond dissociation. J Catal 2012. [DOI: 10.1016/j.jcat.2012.03.007] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
25
|
|
26
|
|
27
|
Pistonesi C, Pronsato ME, Bugyi L, Juan A. The adsorption of CO on potassium doped molybdenum carbide surface: An ab-initio study. Catal Today 2012. [DOI: 10.1016/j.cattod.2011.05.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
28
|
Zaman S, Smith KJ. A Review of Molybdenum Catalysts for Synthesis Gas Conversion to Alcohols: Catalysts, Mechanisms and Kinetics. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2012. [DOI: 10.1080/01614940.2012.627224] [Citation(s) in RCA: 178] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
29
|
Abstract
CO, O(2), and H(2) adsorption on a clean W(2)C(0001)√13×√13 R ± 13.9° reconstructed surface at room temperature (RT) were investigated using high-resolution electron energy loss spectroscopy (HREELS). The W(2)C(0001) adsorbs CO molecularly and adsorbs O(2) dissociatively, but does not adsorb H(2) at RT. In the CO adsorption system, two C-O stretching (antisymmetric CCO stretching) modes were found at 242.3 meV (1954 cm(-1)) and at 253.0 meV (2041 cm(-1)). The low-frequency site is occupied at first with subsequent conversion to the high-frequency site with increasing coverage. Additionally, a small peak was apparent at 104.5 meV (843 cm(-1)), and a middle peak at 50-51 meV (400-410 cm(-1)), which are assignable to a symmetric stretching mode and a hindered translational mode, respectively, of a CCO (ketenylidene) species. These observations are consistent with the CO adsorption model on top of the surface carbon. For oxygen adsorption, two adsorption states were found at 65.2-68.1 meV (526-549 cm(-1)) and 73.6 meV (594 cm(-1)): typical frequencies to oxygen adsorption on metal surfaces. Results suggest that atomic oxygen adsorption occurred on a threefold hollow site of the second W layer.
Collapse
Affiliation(s)
- Takashi Aizawa
- National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
| | | |
Collapse
|
30
|
Ratnasamy C, Wagner JP. Water Gas Shift Catalysis. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2009. [DOI: 10.1080/01614940903048661] [Citation(s) in RCA: 672] [Impact Index Per Article: 44.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
31
|
Miyamoto Y, Akiyama M, Nagai M. Steam reforming of ethanol over nickel molybdenum carbides for hydrogen production. Catal Today 2009. [DOI: 10.1016/j.cattod.2008.12.033] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
32
|
Viñes F, Rodriguez JA, Liu P, Illas F. Catalyst size matters: Tuning the molecular mechanism of the water–gas shift reaction on titanium carbide based compounds. J Catal 2008. [DOI: 10.1016/j.jcat.2008.09.011] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
33
|
Liu P, Rodriguez JA. Water-gas-shift reaction on molybdenum carbide surfaces: essential role of the oxycarbide. J Phys Chem B 2007; 110:19418-25. [PMID: 17004800 DOI: 10.1021/jp0621629] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Density functional theory (DFT) was employed to investigate the behavior of Mo carbides in the water-gas-shift reaction (WGS, CO + H(2)O --> H(2) +CO(2)). The kinetics of the WGS reaction was studied on the surfaces of Mo-terminated Mo(2)C(001) (Mo-Mo(2)C), C-terminated Mo(2)C(001) (C-Mo(2)C), and Cu(111) as a known active catalyst. Our results show that the WGS activity decreases in a sequence: Cu > C-Mo(2)C > Mo-Mo(2)C. The slow kinetics on C-Mo(2)C and Mo-Mo(2)C is due to the fact that the C or Mo sites bond oxygen too strongly to allow the facile removal of this species. In fact, due to the strong O-Mo and O-C interactions, the carbide surfaces are likely to be covered by O produced from the H(2)O dissociation. It is shown that the O-covered Mo-terminated Mo(2)C(001) (O_Mo-Mo(2)C) surface displays the lowest WGS activity of all. With the Mo oxide in the surface, O_Mo-Mo(2)C is too inert to adsorb CO or to dissociate H(2)O. In contrast, the same amount of O on the C-Mo(2)C surface (O_C-Mo(2)C) does not lead to deactivation, but enhances the rate of the WGS reaction and makes this system even more active than Cu. The good behavior of O_C-Mo(2)C is attributed to the formation of a Mo oxycarbide in the surface. The C atoms destabilize O-poisoning by forming CO species, which shift away from the Mo hollow sites when the surface reacts with other adsorbates. In this way, the Mo sites are able to provide a moderate bond to the reaction intermediates. In addition, both C and O atoms are not spectators and directly participate in the WGS reaction.
Collapse
Affiliation(s)
- Ping Liu
- Department of Chemistry, Brookhaven National Laboratory, Bldg. 555, Upton, New York 11973, USA.
| | | |
Collapse
|
34
|
NAGAI M, MATSUDA K. Low-temperature water–gas shift reaction over cobalt–molybdenum carbide catalyst. J Catal 2006. [DOI: 10.1016/j.jcat.2006.01.003] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|