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Song M, Yang M, Yang S, Wang K, Cao C, Li H, Wang X, Gao P, Qian P. First-Principles Calculations and Machine Learning of Hydrogen Evolution Reaction Activity of Nonmetallic Doped β-Mo 2C Support Pt Single-Atom Catalysts. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 39367813 DOI: 10.1021/acsami.4c10705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/07/2024]
Abstract
The most widely used catalyst for the hydrogen evolution reaction (HER) is Pt, but the high cost and low abundance of Pt need to be urgently addressed. Single-atom catalysts (SACs) have been an effective means of improving the utilization of Pt atoms. In this work, we used a nonmetal (NM = B, N, O, F, Si, P, S, Cl, As, Se, Br, Te, and I) doped β-Mo2C (100) C-termination surface as the support, with Pt atoms dispersed on the support surface to construct Pt@NM-Mo2C. Using density functional theory (DFT) calculations, we selected catalysts with excellent HER activity. Among 117 candidate catalysts, 49 catalysts exhibited ideal catalytic performance with Gibbs free energy of hydrogen intermediate (H*) adsorption (ΔGH*) values less than 0.2 eV. The ΔGH* values of 16 catalysts were even lower than that of Pt (ΔGH* ≈ 0.09 eV), with PtI@N2/4-a-Mo2C demonstrating the best performance (ΔGH* = -0.01 eV). Combined with electronic structure analysis, we could understand the impact of charge transfer between Pt and the underlying NM atoms on the strength of the Pt-H bond, thereby promoting HER activity. Using machine learning (ML), we identified that the primary influencing factors of the HER catalytic activity in the Pt@NM-Mo2C system were the Bader charge transfer of Pt (NePt), the d-band center of Pt (εdPt), and the atomic radius of NM (RNM), with NePt having the greatest impact on the HER catalytic activity.
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Affiliation(s)
- Minhui Song
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, Beijing 100083, China
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
| | - Mei Yang
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China
| | - Shuo Yang
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
| | - Kai Wang
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, Beijing 100083, China
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
| | - Chenyang Cao
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, Beijing 100083, China
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
| | - Hongfei Li
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, Beijing 100083, China
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
| | - Xiaoxu Wang
- DP Technology, Beijing 100080, China
- AI for Science Institute, Beijing 100084, China
| | - Panpan Gao
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, Beijing 100083, China
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
| | - Ping Qian
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, Beijing 100083, China
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
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2
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Huang A, Huang H, Wang F, Ke N, Tan C, Hao L, Xu X, Xian Y, Agathopoulos S. Mo 2C-Based Ceramic Electrode with High Stability and Catalytic Activity for Hydrogen Evolution Reaction at High Current Density. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2308068. [PMID: 38054769 DOI: 10.1002/smll.202308068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 11/12/2023] [Indexed: 12/07/2023]
Abstract
Developing robust electrodes with high catalytic performance is a key step for expanding practical HER (hydrogen evolution reaction) applications. This paper reports on novel porous Mo2C-based ceramics with oriented finger-like holes directly used as self-supported HER electrodes. Due to the suitable MoO3 sintering additive, high-strength (55 ± 6 MPa) ceramic substrates and a highly active catalytic layer are produced in one step. The in situ reaction between MoO3 and Mo2C enabled the introduction of O in the Mo2C crystal lattice and the formation of Mo2C(O)/MoO2 heterostructures. The optimal Mo2C-based electrode displayed an overpotential of 333 and 212 mV at 70 °C under a high current intensity of 1500 mA cm-2 in 0.5 m H2SO4 and 1.0 m KOH, respectively, which are markedly better than the performance of Pt wire electrode; furthermore, its price is three orders of magnitude lower than Pt. The chronopotentiometric curves recorded in the 50 - 1500 mA cm-2 range, confirmed its excellent long-term stability in acidic and alkaline media for more than 260 h. Density functional theory (DFT) calculations showed that the Mo2C(O)/MoO2 heterostructures has an optimum electronic structure with appropriate *H adsorption-free energy in an acidic medium and minimum water dissociation energy barrier in an alkaline medium.
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Affiliation(s)
- Anding Huang
- CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Haisen Huang
- CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Feihong Wang
- CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Nianwang Ke
- CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Chuntian Tan
- CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Luyuan Hao
- CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Xin Xu
- CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Yuxi Xian
- Institute of Advanced Technology, University of Science and Technology of China, Hefei, Anhui, 230031, P. R. China
| | - Simeon Agathopoulos
- Department of Materials Science and Engineering, University of Ioannina, Ioannina, GR-451 10, Greece
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3
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Kim S, Ji S, Jeong S, Yang H, Lee S, Choi H, Li OL. Switching Electric Double Layer Potential by Phase Structure Control for Advanced Oxygen Reduction Reaction of Cobalt@Nitrogen Doped Carbon Core-Shell. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2307483. [PMID: 38150612 DOI: 10.1002/smll.202307483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 11/04/2023] [Indexed: 12/29/2023]
Abstract
The key to design an advanced oxygen reduction reaction (ORR) electrocatalyst is a well-balance between the adsorption and desorption of oxygen intermediates. This study systematically evaluated the ORR activity of HCP and FCC cobalt core-shell cobalt/N-doped carbon (Cobalt@NC) catalyst via theoretical and experimental studies. The electronic structure calculations using density functional theory (DFT) calculations revealed that the ORR activity of carbon layer can be improved by 1) switching the electrostatic potential in the electrical double layer due to the polarization induced at the carbon-cobalt interface and 2) modulating the electron population in the bonding orbital in the C-O bonds in an ORR. The results revealed that an O atom is bounded stronger to the outer NC shell with FCC Cobalt than HCP Cobalt, which hindered the desorption steps of OH*. Experimentally, plasma-engineered HCP Cobalt@NC also showed remarkably advanced performance toward ORR compared to that FCC Cobalt@NC. The kinetic current density of HCP Cobalt@NC at 0.85 V versus RHE is calculated as 6.24 mA cm-2, which is six folds higher than FCC Cobalt@NC and even outperform 20 wt.% Pt/C. In a practical Aluminium-air battery, HCP Cobalt@NC also exhibited slightly higher peak power density (110.57 mW cm-2) compared to 20 wt.% Pt/C.
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Affiliation(s)
- Seonghee Kim
- School of Materials Science and Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
| | - Seulgi Ji
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939, Cologne, Germany
| | - Soyoon Jeong
- School of Materials Science and Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
| | - Hyeonsu Yang
- School of Materials Science and Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
- Interdisciplinary Graduate School of Engineering Science, Kyushu University, 6-1 Kasuga-Koen, Kasuga-shi, Fukuoka, 816-8580, Japan
| | - Sungho Lee
- School of Materials Science and Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
| | - Heechae Choi
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939, Cologne, Germany
- Department of Chemistry, Xi'an Jiaotong-Liverpool University, Suzhou, 215123, China
| | - Oi Lun Li
- School of Materials Science and Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
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Fang Z, Liang Y, Li Y, Ni B, Zhu J, Li Y, Huang S, Lin W, Zhang Y. Theoretical Insight into the Special Synergy of Bimetallic Site in Co/MoC Catalyst to Promote N 2 -to-NH 3 Conversion. Chemistry 2023:e202302900. [PMID: 38105290 DOI: 10.1002/chem.202302900] [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: 09/05/2023] [Revised: 12/01/2023] [Accepted: 12/11/2023] [Indexed: 12/19/2023]
Abstract
The catalytic mechanisms of nitrogen reduction reaction (NRR) on the pristine and Co/α-MoC(001) surfaces were explored by density functional theory calculations. The results show that the preferred pathway is that a direct N≡N cleavage occurs first, followed by continuous hydrogenations. The production of second NH3 molecule is identified as the rate-limiting step on both systems with kinetic barriers of 1.5 and 2.0 eV, respectively, indicating that N2 -to-NH3 transformation on bimetallic surface is more likely to occur. The two components of the bimetallic center play different roles during NRR process, in which Co atom does not directly participate in the binding of intermediates, but primarily serves as a reservoir of H atoms. This special synergy makes Co/α-MoC(001) have superior activity for ammonia synthesis. The introduction of Co not only facilitates N2 dissociation, but also accelerates the migration of H atom due to the antibonding characteristic of Co-H bond. This study offers a facile strategy for the rational design and development of efficient catalysts for ammonia synthesis and other reactions involving the hydrogenation processes.
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Affiliation(s)
- Zhongpu Fang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Yingsi Liang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Yanli Li
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Bilian Ni
- Department of Basic Chemistry, College of Pharmacy, Fujian Medical University, Fuzhou, Fujian, 350122, China
| | - Jia Zhu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi, 330022, China
| | - Yi Li
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
- Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen, Fujian, 361005, China
| | - Shuping Huang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Wei Lin
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
- Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen, Fujian, 361005, China
| | - Yongfan Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
- Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen, Fujian, 361005, China
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5
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Zhang J, Feng K, Li Z, Yang B, Yan B, Luo KH. Defect-Driven Efficient Selective CO 2 Hydrogenation with Mo-Based Clusters. JACS AU 2023; 3:2736-2748. [PMID: 37885587 PMCID: PMC10598559 DOI: 10.1021/jacsau.3c00206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 08/25/2023] [Accepted: 08/30/2023] [Indexed: 10/28/2023]
Abstract
Synthetic fuels produced from CO2 show promise in combating climate change. The reverse water gas shift (RWGS) reaction is the key to opening the CO2 molecule, and CO serves as a versatile intermediate for creating various hydrocarbons. Mo-based catalysts are of great interest for RWGS reactions featured for their stability and strong metal-oxygen interactions. Our study identified Mo defects as the intrinsic origin of the high activity of cluster Mo2C for CO2-selective hydrogenation. Specifically, we found that defected Mo2C clusters supported on nitrogen-doped graphene exhibited exceptional catalytic performance, attaining a reaction rate of 6.3 gCO/gcat/h at 400 °C with over 99% CO selectivity and good stability. Such a catalyst outperformed other Mo-based catalysts and noble metal-based catalysts in terms of facile dissociation of CO2, highly selective hydrogenation, and nonbarrier liberation of CO. Our study revealed that as a potential descriptor, the atomic magnetism linearly correlates to the liberation capacity of CO, and Mo defects facilitated product desorption by reducing the magnetization of the adsorption site. On the other hand, the defects were effective in neutralizing the negative charges of surface hydrogen, which is crucial for selective hydrogenation. Finally, we have successfully demonstrated that the combination of a carbon support and the carbonization process synergistically serves as a feasible strategy for creating rich Mo defects, and biochar can be a low-cost alternative option for large-scale applications.
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Affiliation(s)
- Jiajun Zhang
- National
Engineering Research Center of Green Recycling for Strategic Metal
Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Center
for Combustion Energy, Key Laboratory for Thermal Science and Power
Engineering of Ministry of Education, International Joint Laboratory
on Low Carbon Clean Energy Innovation, Tsinghua
University, Beijing 100084, China
| | - Kai Feng
- Department
of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Zhengwen Li
- Department
of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Bin Yang
- Center
for Combustion Energy, Key Laboratory for Thermal Science and Power
Engineering of Ministry of Education, International Joint Laboratory
on Low Carbon Clean Energy Innovation, Tsinghua
University, Beijing 100084, China
| | - Binhang Yan
- Department
of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Kai Hong Luo
- Center
for Combustion Energy, Key Laboratory for Thermal Science and Power
Engineering of Ministry of Education, International Joint Laboratory
on Low Carbon Clean Energy Innovation, Tsinghua
University, Beijing 100084, China
- Department
of Mechanical Engineering, University College
London, Torrington Place, London WC1E 7JE, U.K.
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6
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Meena R, Bitter JH, Zuilhof H, Li G. Toward the Rational Design of More Efficient Mo 2C Catalysts for Hydrodeoxygenation-Mechanism and Descriptor Identification. ACS Catal 2023; 13:13446-13455. [PMID: 37881787 PMCID: PMC10594588 DOI: 10.1021/acscatal.3c03728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/13/2023] [Indexed: 10/27/2023]
Abstract
Viable alternatives to scarce and expensive noble-metal-based catalysts are transition-metal carbides such as Mo and W carbides. It has been shown that these are active and selective catalysts in the hydrodeoxygenation of renewable lipid-based feedstocks. However, the reaction mechanism and the structure-activity relationship of these transition-metal carbides have not yet been fully clarified. In this work, the reaction mechanism of butyric acid hydrodeoxygenation (HDO) over molybdenum carbide (Mo2C) has been studied comprehensively by means of density functional theory coupled with microkinetic modeling. We identified the rate-determining step to be butanol dissociation: C4H9*OH + * → C4H9* + *OH. Then we further explored the possibility to facilitate this step upon heteroatom doping and found that Zr- and Nb-doped Mo2C are the most promising catalysts with enhanced HDO catalytic activity. Linear-scaling relationships were established between the electronic and geometrical descriptors of the dopants and the catalytic performance of various doped Mo2C catalysts. It was demonstrated that descriptors such as dopants' d-band filling and atomic radius play key roles in governing the catalytic activity. This fundamental understanding delivers practical strategies for the rational design of Mo2C-based transition-metal carbide catalysts with improved HDO performance.
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Affiliation(s)
- Raghavendra Meena
- Biobased
Chemistry and Technology, Wageningen University, Bornse Weilanden 9, 6708 WG Wageningen, The Netherlands
- Laboratory
of Organic Chemistry, Wageningen University, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Johannes Hendrik Bitter
- Biobased
Chemistry and Technology, Wageningen University, Bornse Weilanden 9, 6708 WG Wageningen, The Netherlands
| | - Han Zuilhof
- Laboratory
of Organic Chemistry, Wageningen University, Stippeneng 4, 6708 WE Wageningen, The Netherlands
- School
of Pharmaceutical Sciences and Technology, Tianjin University, 92 Weijin Road, Tianjin 300072, People’s Republic
of China
| | - Guanna Li
- Biobased
Chemistry and Technology, Wageningen University, Bornse Weilanden 9, 6708 WG Wageningen, The Netherlands
- Laboratory
of Organic Chemistry, Wageningen University, Stippeneng 4, 6708 WE Wageningen, The Netherlands
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7
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Prats H, Stamatakis M. Stability and reactivity of metal nanoclusters supported on transition metal carbides. NANOSCALE ADVANCES 2023; 5:3214-3224. [PMID: 37325529 PMCID: PMC10262968 DOI: 10.1039/d3na00231d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 05/19/2023] [Indexed: 06/17/2023]
Abstract
Small particles of transition metals (TM) supported on transition metal carbides (TMC) - TMn@TMC - provide a plethora of design opportunities for catalytic applications due to their highly exposed active centres, efficient atom utilisation and the physicochemical properties of the TMC support. To date, however, only a very small subset of TMn@TMC catalysts have been tested experimentally and it is unclear which combinations may best catalyse which chemical reactions. Herein, we develop a high-throughput screening approach to catalyst design for supported nanoclusters based on density functional theory, and apply it to elucidate the stability and catalytic performance of all possible combinations between 7 monometallic nanoclusters (Rh, Pd, Pt, Au, Co, Ni and Cu) and 11 stable support surfaces of TMCs with 1 : 1 stoichiometry (TiC, ZrC, HfC, VC, NbC, TaC, MoC and WC) towards CH4 and CO2 conversion technologies. We analyse the generated database to unravel trends or simple descriptors in their resistance towards metal aggregate formation and sintering, oxidation, stability in the presence of adsorbate species, and study their adsorptive and catalytic properties, to facilitate the discovery of novel materials in the future. We identify 8 TMn@TMC combinations as promising catalysts, all of them being new for experimental validation, thus expanding the chemical space for efficient conversion of CH4 and CO2.
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Affiliation(s)
- Hector Prats
- Department of Chemical Engineering, University College London Roberts Building, Torrington Place London WC1E 7JE UK
| | - Michail Stamatakis
- Department of Chemical Engineering, University College London Roberts Building, Torrington Place London WC1E 7JE UK
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8
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Adsorption and infrared spectra simulations of acrylic acid over (001) surface of molybdenum carbide. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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9
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Zhang Y, Wang Y, Guo C, Wang Y. Molybdenum Carbide-Based Photocatalysts: Synthesis, Functionalization, and Applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:12739-12756. [PMID: 36245364 DOI: 10.1021/acs.langmuir.2c01887] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
As an effective non-noble, molybdenum carbide (MoxC: MoC or Mo2C) has attracted extensive attention and is regarded as a promising research area in the near future owing to its good biocompatibility, high stability, band gap adjustability, rich valence states, and excellent catalytic activity. This Perspective summarizes the recent progress and achievements for the molybdenum carbide-based catalysts. First, the crystal and band structures of molybdenum carbides are generally presented. Second, various modifying strategies for molybdenum carbides are outlined to enhance the photocatalytic performance, including doping engineering, vacancy engineering, morphology and structure engineering, and the establishment of molybdenum carbide-based composite catalysts. Finally, potential applications in the photocatalysis area of molybdenum carbide-based photocatalyst are generalized. Future development trends and perspective for this promising material are also discussed.
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Affiliation(s)
- Yifan Zhang
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
| | - Yan Wang
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
| | - Chaofei Guo
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
| | - Yong Wang
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
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10
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Yang TT, Wang A, House SD, Yang J, Lee JK, Saidi WA. Computationally Guided Design to Accelerate Discovery of Doped β-Mo 2C Catalysts toward Hydrogen Evolution Reaction. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Timothy T. Yang
- Department of Materials Science and Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Anqi Wang
- Department of Materials Science and Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Stephen D. House
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Environmental TEM Catalysis Consortium (ECC), University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Judith Yang
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Environmental TEM Catalysis Consortium (ECC), University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Jung-Kun Lee
- Department of Materials Science and Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Wissam A. Saidi
- Department of Materials Science and Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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11
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Nguyen ET, Bertini IA, Ritz AJ, Lazenby RA, Mao K, McBride JR, Mattia AV, Kuszynski JE, Wenzel SF, Bennett SD, Strouse GF. A Single Source, Scalable Route for Direct Isolation of Earth-Abundant Nanometal Carbide Water-Splitting Electrocatalysts. Inorg Chem 2022; 61:13836-13845. [PMID: 36007248 DOI: 10.1021/acs.inorgchem.2c01713] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Single-phase MxCs (M = Fe, Co, and Ni) were prepared by solvothermal conversion of Prussian blue single source precursors. The single source precursor is prepared in water, and the conversion process is carried out in alkylamines at reaction temperatures above 200 °C. The reaction is scalable using a commercial source of Fe-PB. High-resolution transmission electron microscopy, X-ray photoelectron microscopy, and powder X-ray diffraction confirm that carbides have thin oxide termination but lack graphitic surfaces. Electrocatalytic activity reveals that Fe3C and Co2C are oxygen evolution reaction electrocatalysts, while Ni3C is a bifunctional [OER and hydrogen evolution reaction (HER)] electrocatalyst.
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Affiliation(s)
- Edward T Nguyen
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Isabella A Bertini
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Amanda J Ritz
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Robert A Lazenby
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Keyou Mao
- Department of Industrial and Manufacturing Engineering, FAMU-FSU College of Engineering, Tallahassee, Florida 32310, United States.,National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - James R McBride
- Vanderbilt Institute of Nanoscale Science and Engineering, Nashville, Tennessee 37235, United States
| | - Alexzandra V Mattia
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Jason E Kuszynski
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Samuel F Wenzel
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Sarah D Bennett
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Geoffrey F Strouse
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
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12
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Mabuea B, Swart HC, Erasmus E. Photocatalytic Decomposition of an Azo Dye Using Transition-Metal-Doped Tungsten and Molybdenum Carbides. ACS OMEGA 2022; 7:23401-23411. [PMID: 35847302 PMCID: PMC9280970 DOI: 10.1021/acsomega.2c01727] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The preparation, characterization, and photocatalytic application of tungsten or molybdenum carbides (Ni-WC, 1, Co-WC, 2, Ni-MoC, 3, Co-MoC, 4, NiCo-WC, 5, NiCo-MoC, 6, NiFe-WC, 7, and NiFe-MoC, 8) doped with transition metals (Fe, Co, and Ni) are reported. These transition-metal carbide (TMC) particles show that the submicrometer globular particles agglomerated to form larger particles, with smaller crystallites present on the surface of the large particles. These crystallite sizes range between 4 and 34 nm (as calculated from X-ray diffraction data) depending on the metal dopant and type of carbide. Oxidation of the metal carbides is evident from the two sets of photoelectron lines present in the X-ray photoelectron spectroscopy (XPS) of the W 4f area. The Mo 3d spectra reveal four sets of photoelectron lines associated with oxidized MoO2 and MoO3 as well as Mo2+ and Mo3+ associated with MoC1-x . The XPS of the dopant metals Ni, Co, and Fe also show partial oxidation. The photocatalytic decomposition of Congo red (an azo dye) is used as a model reaction to determine the photocatalytic activities of the transition-metal carbides, which is related to the TMCs' optical band gap energies.
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Affiliation(s)
- Busisiwe
Petunia Mabuea
- Department
of Physics, University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa
| | | | - Elizabeth Erasmus
- Department
of Chemistry, University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa
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13
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Jimenez-Orozco C, Figueras M, Flórez E, Viñes F, Rodriguez JA, Illas F. Effect of nanostructuring on the interaction of CO 2 with molybdenum carbide nanoparticles. Phys Chem Chem Phys 2022; 24:16556-16565. [PMID: 35770743 DOI: 10.1039/d2cp01143c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition metal carbides are increasingly used as catalysts for the transformation of CO2 into useful chemicals. Recently, the effect of nanostructuring of such carbides has started to gain relevance in tailoring their catalytic capabilities. Catalytic materials based on molybdenum carbide nanoparticles (MoCy) have shown a remarkable ability to bind CO2 at room temperature and to hydrogenate it into oxygenates or light alkanes. However, the involved chemistry is largely unknown. In the present work, a systematic computational study is presented aiming to elucidate the chemistry behind the bonding of CO2 with a representative set of MoCy nanoparticles of increasing size, including stoichiometric and non-stoichiometric cases. The obtained results provide clear trends to tune the catalytic activity of these systems and to move towards more efficient CO2 transformation processes.
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Affiliation(s)
- Carlos Jimenez-Orozco
- Universidad de Medellín, Facultad de Ciencias Básicas, Grupo de Materiales con Impacto (Mat&mpac), Carrera 87 No 30-65, Medellín, Colombia.
| | - Marc Figueras
- Universitat de Barcelona, Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), c/Martí i Franquès 1-11, 08028 Barcelona, Spain.
| | - Elizabeth Flórez
- Universidad de Medellín, Facultad de Ciencias Básicas, Grupo de Materiales con Impacto (Mat&mpac), Carrera 87 No 30-65, Medellín, Colombia.
| | - Francesc Viñes
- Universitat de Barcelona, Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), c/Martí i Franquès 1-11, 08028 Barcelona, Spain.
| | - José A Rodriguez
- Brookhaven National Laboratory, Chemistry Division, Upton, New York 11973, USA
| | - Francesc Illas
- Universitat de Barcelona, Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), c/Martí i Franquès 1-11, 08028 Barcelona, Spain.
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14
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Yin X, Li X, Liang X, Chen R, Nagaumi H, Li B, Guo J, Liu D. Substantial enhancement of hydrogen permeability of Mo2C/V composite membranes by ion beam sputtering. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Xu D, Lin X, Li QY, Zhang SN, Xia SY, Zhai GY, Chen JS, Li XH. Boosting Mass Exchange between Pd/NC and MoC/NC Dual Junctions via Electron Exchange for Cascade CO 2 Fixation. J Am Chem Soc 2022; 144:5418-5423. [PMID: 35230846 DOI: 10.1021/jacs.1c12986] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Merging existing catalysts together as a cascade catalyst may achieve "one-pot" synthesis of complex but functional molecules by simplifying multistep reactions, which is the blueprint of sustainable chemistry with low pollutant emission and consumption of energy and materials only when the smooth mass exchange between different catalysts is ensured. Effective strategies to facilitate the mass exchange between different active centers, which may dominate the final activity of various cascade catalysts, have not been reached until now, even though charged interfaces due to work function driven electron exchange have been widely observed. Here, we successfully constructed mass (reactants and intermediates) exchange paths between Pd/N-doped carbon and MoC/N-doped carbon induced by interfacial electron exchange to trigger the mild and cascade methylation of amines using CO2 and H2. Theoretical and experimental results have demonstrated that the mass exchange between electron-rich MoC and electron-deficient Pd could prominently improve the production of N,N-dimethyl tertiary amine, which results in a remarkably high turnover frequency value under mild conditions, outperforming the state-of-the-art catalysts in the literature by a factor of 5.9.
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Affiliation(s)
- Dong Xu
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Xiu Lin
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Qi-Yuan Li
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Shi-Nan Zhang
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Si-Yuan Xia
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Guang-Yao Zhai
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Jie-Sheng Chen
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Xin-Hao Li
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
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16
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Deng B, Wang Z, Chen W, Li JT, Luong DX, Carter RA, Gao G, Yakobson BI, Zhao Y, Tour JM. Phase controlled synthesis of transition metal carbide nanocrystals by ultrafast flash Joule heating. Nat Commun 2022; 13:262. [PMID: 35017518 PMCID: PMC8752793 DOI: 10.1038/s41467-021-27878-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 12/13/2021] [Indexed: 01/12/2023] Open
Abstract
Nanoscale carbides enhance ultra-strong ceramics and show activity as high-performance catalysts. Traditional lengthy carburization methods for carbide syntheses usually result in coked surface, large particle size, and uncontrolled phase. Here, a flash Joule heating process is developed for ultrafast synthesis of carbide nanocrystals within 1 s. Various interstitial transition metal carbides (TiC, ZrC, HfC, VC, NbC, TaC, Cr2C3, MoC, and W2C) and covalent carbides (B4C and SiC) are produced using low-cost precursors. By controlling pulse voltages, phase-pure molybdenum carbides including β-Mo2C and metastable α-MoC1-x and η-MoC1-x are selectively synthesized, demonstrating the excellent phase engineering ability of the flash Joule heating by broadly tunable energy input that can exceed 3000 K coupled with kinetically controlled ultrafast cooling (>104 K s-1). Theoretical calculation reveals carbon vacancies as the driving factor for topotactic transition of carbide phases. The phase-dependent hydrogen evolution capability of molybdenum carbides is investigated with β-Mo2C showing the best performance.
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Affiliation(s)
- Bing Deng
- Department of Chemistry, Rice University, Houston, TX, 77005, USA
| | - Zhe Wang
- Department of Chemistry, Rice University, Houston, TX, 77005, USA
| | - Weiyin Chen
- Department of Chemistry, Rice University, Houston, TX, 77005, USA
| | - John Tianci Li
- Department of Chemistry, Rice University, Houston, TX, 77005, USA
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX, 77005, USA
| | - Duy Xuan Luong
- Department of Chemistry, Rice University, Houston, TX, 77005, USA
| | - Robert A Carter
- Department of Chemistry, Rice University, Houston, TX, 77005, USA
| | - Guanhui Gao
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX, 77005, USA
| | - Boris I Yakobson
- Department of Chemistry, Rice University, Houston, TX, 77005, USA
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX, 77005, USA
- Smalley-Curl Institute, Rice University, Houston, TX, 77005, USA
| | - Yufeng Zhao
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX, 77005, USA.
- Corban University, Salem, Oregon, 97317, USA.
| | - James M Tour
- Department of Chemistry, Rice University, Houston, TX, 77005, USA.
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX, 77005, USA.
- Smalley-Curl Institute, Rice University, Houston, TX, 77005, USA.
- NanoCarbon Center and the Welch Institute for Advanced Materials, Rice University, Houston, TX, 77005, USA.
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17
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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.
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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
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18
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Chu C, Li C, Liu X, Zhao H, Wu C, Li J, Liu K, Li Q, Cao D. The surface phase structure evolution of the fcc MoC (001) surface in a steam reforming atmosphere: systematic kinetic and thermodynamic investigations. Catal Sci Technol 2022. [DOI: 10.1039/d1cy01554k] [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
Systematic ab initio-based calculations were performed to clarify the surface structure evolution of the fcc MoC (001) surface at different H2O/H2 pressures.
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Affiliation(s)
- Changqing Chu
- Qingdao Univ Sci & Technol, Inst Climate Change & Energy Sustainable Dev, Qingdao 266061, P.R. China
- Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, 1088 Xueyuan Avenue, Shenzhen 518055, P.R. China
| | - Chao Li
- Department of Chemistry, College of Science, Southern University of Science and Technology, 1088 Xueyuan Avenue, Shenzhen 518055, P.R. China
- Harbin Institute of Technology, Harbin, 150080, China
| | - Xue Liu
- Department of Chemistry, College of Science, Southern University of Science and Technology, 1088 Xueyuan Avenue, Shenzhen 518055, P.R. China
| | - Hang Zhao
- Department of Chemistry, College of Science, Southern University of Science and Technology, 1088 Xueyuan Avenue, Shenzhen 518055, P.R. China
| | - Changning Wu
- Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, 1088 Xueyuan Avenue, Shenzhen 518055, P.R. China
| | - Junguo Li
- Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, 1088 Xueyuan Avenue, Shenzhen 518055, P.R. China
| | - Ke Liu
- Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, 1088 Xueyuan Avenue, Shenzhen 518055, P.R. China
- Department of Chemistry, College of Science, Southern University of Science and Technology, 1088 Xueyuan Avenue, Shenzhen 518055, P.R. China
| | - Qi Li
- Shenzhen Gas Corporation Ltd., Shenzhen, 518049, PR China
| | - Daofan Cao
- Birmingham Centre for Energy Storage (BCES) & School of Chemical Engineering, University of Birmingham, B15 2TT UK
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19
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20
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Sharma P, Minakshi Sundaram M, Watcharatharapong T, Jungthawan S, Ahuja R. Tuning the Nanoparticle Interfacial Properties and Stability of the Core-Shell Structure in Zn-Doped NiMoO 4@AWO 4. ACS APPLIED MATERIALS & INTERFACES 2021; 13:56116-56130. [PMID: 34783535 DOI: 10.1021/acsami.1c16287] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The ability to tune the interfacial region in core-shell nanocomposites with a surface reconstruction as a source for surface energy (de)stabilization is presented. We consider Zn-doped nickel molybdate (NiMoO4) (ZNM) as a core crystal structure and AWO4 (A = Co or Mg) as a shell surface. Based on the density-functional theory method, the interfacial models of Zn-doped NiMoO4@AWO4 (ZNM@AW) core@shell structures are simulated and revealed to undergo surface reconstruction on the (-110) and (-202) surfaces of the AW shells, where the surface degradation of ZNM@MW(-110) is observed. The theoretical simulation is validated against the electrochemical performance of supercapacitor studies. To verify, we synthesize the hierarchical ZNM@AW core@shell semiconductor structured nanocomposites grown on a nickel foam conductive substrate using a facile and green two-step hydrothermal method. The morphology and chemical and electrochemical properties of the hierarchically structured nanocomposites are characterized in detail. The performance of the core@shell is significantly affected by the chosen intrinsic properties of metal oxides and exhibited high performance compared to a single-component system in supercapacitors. The proposed asymmetric device, Zn-doped NiMoO4@CoWO4 (ZNM@CW)||activated carbon, exhibits a superior pseudo-capacitance, delivering a high areal capacitance of 0.892 F cm-2 at a current density of 2 mA cm-2 and an excellent cycling stability of 96% retention of its initial capacitance after 1000 charge-discharge cycles. These fundamental theoretical and experimental insights with the extent of the surface reconstruction sufficiently explain the storage properties of the studied materials.
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Affiliation(s)
- Pratigya Sharma
- College of Science, Health, Engineering & Education, Murdoch University, Perth, WA 6150, Australia
| | | | | | - Sirichok Jungthawan
- School of Physics, Institute of Science, and Center of Excellence in Advanced Functional Materials, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
- Thailand Center of Excellence in Physics, Ministry of Higher Education, Science, Research and Innovation, 328 Si Ayutthaya Road, Bangkok 10400, Thailand
| | - Rajeev Ahuja
- Condensed Matter Theory Group, Material's Theory Division, Department of Physics and Astronomy, Uppsala University, Box 530, Uppsala SE-751 21, Sweden
- Department of Physics, Indian Institute of Technology (IIT) Ropar, Rupnagar 140001, Punjab, India
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21
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Koverga AA, Flórez E, Jimenez-Orozco C, Rodriguez JA. Spot the difference: hydrogen adsorption and dissociation on unsupported platinum and platinum-coated transition metal carbides. Phys Chem Chem Phys 2021; 23:20255-20267. [PMID: 34477186 DOI: 10.1039/d1cp02974f] [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
Hydrogenation reactions are involved in several processes in heterogeneous catalysis. Platinum is the best-known catalyst; however, there are limitations to its practical use. Therefore, it is necessary to explore alternative materials and transition metal carbides (TMCs) have emerged as potential candidates. We explore the possibility of using cheap TMCs as supports for a Pt monolayer, aiming to reduce the amount of the noble metal in the catalyst without a significant loss of its activity towards H2 dissociation. Hence, analyzing H2 dissociation from a fundamental point of view is a necessary step towards a further practical catalyst. By means of periodic DFT calculations, we analyze H2 adsorption and dissociation on Pt/β-Mo2C and Pt/α-WC surfaces, as a function of hydrogen surface coverage (ΘH), resembling a more realistic model of a catalyst. H2 dissociation rates were analyzed as a function of the reaction temperature. The results show that Pt/C-WC and Pt/Mo-Mo2C have a Pt-like behavior for H2 dissociation at ΘH > 1/2 ML. At a particular temperature of 298 K, Pt/C-WC and Pt/Mo-Mo2C have low energy barriers for H2* → 2H* (0.13 and 0.11 eV, respectively), close to the value of Pt (0.06 eV). For the highest coverage, i.e. ΘH = 1, Pt/C-WC has a lower activation energy and a higher reaction rate than Pt. Finally, the H2 dissociation rate is higher in Pt/Mo-Mo2C than in Pt when increasing the temperature above 298 K. Our results put Pt/C-WC and Pt/Mo-Mo2C under the spotlight as potential catalysts for H2 dissociation, with a similar performance to Pt, paving the way for further experimental and/or theoretical studies, addressing the capability of Pt/TMC as practical catalysts in hydrogenation reactions.
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Affiliation(s)
- Andrey A Koverga
- Grupo de Investigación Mat&mpac, Facultad de Ciencias Básicas, Universidad de Medellín, Medellín 050026, Colombia.
| | - Elizabeth Flórez
- Grupo de Investigación Mat&mpac, Facultad de Ciencias Básicas, Universidad de Medellín, Medellín 050026, Colombia.
| | - Carlos Jimenez-Orozco
- Grupo de Investigación Mat&mpac, Facultad de Ciencias Básicas, Universidad de Medellín, Medellín 050026, Colombia.
| | - José A Rodriguez
- Chemistry Division, Brookhaven National Laboratory, Upton, NY 11973, USA
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22
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Figueras M, Gutiérrez RA, Viñes F, Ramírez PJ, Rodriguez JA, Illas F. Supported Molybdenum Carbide Nanoparticles as an Excellent Catalyst for CO 2 Hydrogenation. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01738] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Marc Figueras
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/ Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Ramón A. Gutiérrez
- Facultad de Ciencias, Universidad Central de Venezuela, 1020-A Caracas, Venezuela
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Francesc Viñes
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/ Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Pedro J. Ramírez
- Facultad de Ciencias, Universidad Central de Venezuela, 1020-A Caracas, Venezuela
| | - José A. Rodriguez
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Francesc Illas
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/ Martí i Franquès 1-11, 08028 Barcelona, Spain
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23
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Zhao J, Bai Y, Liang X, Wang T, Wang C. Photothermal catalytic CO2 hydrogenation over molybdenum carbides: Crystal structure and photothermocatalytic synergistic effects. J CO2 UTIL 2021. [DOI: 10.1016/j.jcou.2021.101562] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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24
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García-Romeral N, Keyhanian M, Morales-García Á, Illas F. Relating X-ray photoelectron spectroscopy data to chemical bonding in MXenes. NANOSCALE ADVANCES 2021; 3:2793-2801. [PMID: 36134196 PMCID: PMC9418319 DOI: 10.1039/d0na01033b] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 03/01/2021] [Indexed: 06/13/2023]
Abstract
The relationship between core level binding energy shifts (ΔCLBEs), that can be experimentally determined by X-ray photoelectron spectroscopy, and chemical bonding is analyzed for a series of MXenes, a new family of two-dimensional materials with a broad number of applications in nanotechnology. Based on first-principles calculations, the atomic and electronic structure of bare and O-terminated carbide MXene with M2C and M2CO2 (M = Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W) stoichiometries are investigated with a focus on trends in the C(1s) and O(1s) ΔCLBEs, including initial and final state effects, along with the series. A rather good linear correlation between the available experimental and calculated C(1s) and O(1s) ΔCLBEs exists, with quantitative agreement when final state effects are included, that validates the conclusions from the present computational approach. The present study shows that ΔCLBEs of bare MXenes are governed by the initial state effects and directly correlate with the net charge on the C atoms. However, for the case of O-terminated MXenes, C(1s) and O(1s) ΔCLBEs exhibit a much less significant correlation with the net charge of either C or O atoms which is attributed to the structural changes induced on the M2C moiety by the presence of the O layers and the different stacking sequence observed depending on the MXene composition. The present study shows how and when XPS can be used to extract information regarding the nature of the chemical bond in bare or functionalized MXenes.
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Affiliation(s)
- Néstor García-Romeral
- Departament de Ciència de Materials i Química Física, Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona c/Martí i Franquès 1-11 08028 Barcelona Spain
| | - Masoomeh Keyhanian
- Departament de Ciència de Materials i Química Física, Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona c/Martí i Franquès 1-11 08028 Barcelona Spain
- Department of Physical Chemistry, Faculty of Chemistry, University of Mazandaran Babolsar 47416-95447 Iran
| | - Ángel Morales-García
- Departament de Ciència de Materials i Química Física, Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona c/Martí i Franquès 1-11 08028 Barcelona Spain
| | - Francesc Illas
- Departament de Ciència de Materials i Química Física, Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona c/Martí i Franquès 1-11 08028 Barcelona Spain
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25
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A DFT study of methane conversion on Mo-terminated Mo2C carbides: Carburization vs C–C coupling. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.02.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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Huang X, Wang J, Gao J, Zhang Z, Gan LY, Xu H. Structural Evolution and Underlying Mechanism of Single-Atom Centers on Mo 2C(100) Support during Oxygen Reduction Reaction. ACS APPLIED MATERIALS & INTERFACES 2021; 13:17075-17084. [PMID: 33787216 DOI: 10.1021/acsami.1c01477] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The single-metal atoms coordinating with the surface atoms of the support constitute the active centers of as-prepared single-atom catalysts (SACs). However, under hash electrochemical conditions, (1) supports' surfaces may experience structural change, which turn to be distinct from those at ambient conditions; (2) during catalysis, the dynamic responses of a single atom to the attack of reaction intermediates likely change the coordination environment of a single atom. These factors could alter the performance of SACs. Herein, we investigate these issues using Mo2C(100)-supported single transition-metal (TM) atoms as model SACs toward catalyzing the oxygen reduction reaction (ORR). It is found that the Mo2C(100) surface is oxidized under ORR turnover conditions, resulting in significantly weakened bonding between single TM atoms and the Mo2C(100) surface (TM@Mo2C(100)_O* term for SAC). While the intermediate in 2 e- ORR does not change the local structures of the active centers in these SACs, the O* intermediate emerging in 4 e- ORR can damage Rh@ and Cu@Mo2C(100)_O*. Furthermore, on the basis of these findings, we propose Pt@Mo2C(100)_O* as a qualified ORR catalyst, which exhibits extraordinary 4 e- ORR activity with an overpotential of only 0.33 V, surpassing the state-of-the-art Pt(111), and thus being identified as a promising alternative to the commercial Pt/C catalyst.
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Affiliation(s)
- Xiang Huang
- Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jiong Wang
- Institute of Advanced Synthesis (IAS), School of Chemistry and Chemical Engineering, Northwestern Polytechnical University (NPU), Xi'an 710072, China
- Yangtze River Delta Research Institute of NPU, Taicang Jiangsu, 215400, China
| | - Jiajian Gao
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Zhe Zhang
- Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Li-Yong Gan
- Institute for Structure and Function and Department of Physics, Chongqing University, Chongqing 400030, China
| | - Hu Xu
- Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
- Guangdong Provincial Key Laboratory of Computational Science and Material Design, Southern University of Science and Technology, Shenzhen 518055, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, Southern University of Science and Technology, Shenzhen 518055, China
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27
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Ge R, Huo J, Sun M, Zhu M, Li Y, Chou S, Li W. Surface and Interface Engineering: Molybdenum Carbide-Based Nanomaterials for Electrochemical Energy Conversion. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e1903380. [PMID: 31532899 DOI: 10.1002/smll.201903380] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 08/31/2019] [Indexed: 06/10/2023]
Abstract
Molybdenum carbide (Mox C)-based nanomaterials have shown competitive performances for energy conversion applications based on their unique physicochemical properties. A large surface area and proper surface atomic configuration are essential to explore potentiality of Mox C in electrochemical applications. Although considerable efforts are made on the development of advanced Mox C-based catalysts for energy conversion with high efficiency and stability, some urgent issues, such as low electronic conductivity, low catalytic efficiency, and structural instability, have to be resolved in accordance with their application environments. Surface and interface engineering have shown bright prospects to construct highly efficient Mox C-based electrocatalysts for energy conversion including the hydrogen evolution reaction, oxygen evolution reaction, nitrogen reduction reaction, and carbon dioxide reduction reaction. In this Review, the recent progresses in terms of surface and interface engineering of Mox C-based electrocatalytic materials are summarized, including the increased number of active sites by decreasing the particle size or introducing porous or hierarchical structures and surface modification by introducing heteroatom(s), defects, carbon materials, and others electronic conductive species. Finally, the challenges and prospects for energy conversion on Mox C-based nanomaterials are discussed in terms of key performance parameters for the catalytic performance.
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Affiliation(s)
- Riyue Ge
- Institute of Materials, School of Materials Science and Engineering/Institute for Sustainable Energy, Shanghai University, Shanghai, 200444, China
| | - Juanjuan Huo
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Mingjie Sun
- Institute of Materials, School of Materials Science and Engineering/Institute for Sustainable Energy, Shanghai University, Shanghai, 200444, China
| | - Mingyuan Zhu
- Institute of Materials, School of Materials Science and Engineering/Institute for Sustainable Energy, Shanghai University, Shanghai, 200444, China
| | - Ying Li
- Institute of Materials, School of Materials Science and Engineering/Institute for Sustainable Energy, Shanghai University, Shanghai, 200444, China
| | - Shulei Chou
- Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, North Wollongong, New South Wales, 2522, Australia
| | - Wenxian Li
- Institute of Materials, School of Materials Science and Engineering/Institute for Sustainable Energy, Shanghai University, Shanghai, 200444, China
- Shanghai Key Laboratory of High Temperature Superconductors, Shanghai, 200444, China
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28
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Liu X, Liu J, Yang Y, Li YW, Wen X. Theoretical Perspectives on the Modulation of Carbon on Transition-Metal Catalysts for Conversion of Carbon-Containing Resources. ACS Catal 2021. [DOI: 10.1021/acscatal.0c04739] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Xingchen Liu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, People’s Republic of China
- The University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Jinjia Liu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, People’s Republic of China
- The University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Yong Yang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, People’s Republic of China
- The University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Beijing 101400, People’s Republic of China
| | - Yong-Wang Li
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, People’s Republic of China
- The University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Beijing 101400, People’s Republic of China
| | - Xiaodong Wen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, People’s Republic of China
- The University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Beijing 101400, People’s Republic of China
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29
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Koverga AA, Flórez E, Jimenez-Orozco C, Rodriguez JA. Not all platinum surfaces are the same: Effect of the support on fundamental properties of platinum adlayer and its implications for the activity toward hydrogen evolution reaction. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2020.137598] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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30
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Dolz D, Morales-García Á, Viñes F, Illas F. Exfoliation Energy as a Descriptor of MXenes Synthesizability and Surface Chemical Activity. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:E127. [PMID: 33430502 PMCID: PMC7828070 DOI: 10.3390/nano11010127] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 12/31/2020] [Accepted: 01/04/2021] [Indexed: 11/17/2022]
Abstract
MXenes are two-dimensional nanomaterials isolated from MAX phases by selective extraction of the A component-a p-block element. The MAX exfoliation energy, Eexf, is considered a chemical descriptor of the MXene synthesizability. Here, we show, by density functional theory (DFT) estimations of Eexf values for 486 different MAX phases, that Eexf decreases (i) when MAX is a nitride, (ii) when going along a metal M component d series, (iii) when going down a p-block A element group, and (iv) when having thicker MXenes. Furthermore, Eexf is found to bias, even to govern, the surface chemical activity, evaluated here on the CO2 adsorption strength, so that more unstable MXenes, displaying larger Eexf values, display a stronger attachment of species upon.
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Affiliation(s)
| | | | - Francesc Viñes
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martí i Franquès 1-11, 08028 Barcelona, Spain; (D.D.); (Á.M.-G.); (F.I.)
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31
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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.
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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
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32
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Insights on alkylidene formation on Mo2C: A potential overlap between direct deoxygenation and olefin metathesis. J Catal 2021. [DOI: 10.1016/j.jcat.2020.11.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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33
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De Zanet A, Kondrat SA. A Review of Preparation Strategies for α-MoC1-x Catalysts. JOHNSON MATTHEY TECHNOLOGY REVIEW 2021. [DOI: 10.1595/205651322x16383716226126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Transition metal carbides are attracting growing attention as robust and affordable alternative heterogeneous catalysts to platinum group metals, for a host of contemporary and established hydrogenation, dehydrogenation, and isomerisation reactions. In particular, the metastable α-MoC1-x phase has been shown to exhibit interesting catalytic properties for low temperature processes reliant on O-H and C-H bond activation. While demonstrating exciting catalytic properties, a significant challenge exists in the application of metastable carbides, namely the challenging procedure for their preparation. In this review we will briefly discuss the properties and catalytic applications of α-MoC1-x, followed by a more detailed discussion on available synthesis methods and important parameters that influence carbide properties. Techniques are contrasted with properties of phase, surface area, morphology and Mo:C being considered. Further, we briefly relate these observations to experimental and theoretical studies of α-MoC1-x in catalytic applications. Synthetic strategies discussed are, the original temperature programmed ammonolysis followed by carburisation, alternative oxycarbide or hydrogen bronze precursor phases, heat treatment of moybdate-amide compounds and other low temperature synthetic routes. The importance of carbon removal and catalyst passivation in relation to surface and bulk properties are also discussed. Novel techniques that by-pass the apparent bottle neck of ammonolysis are reported, however a clear understanding of intermediate phases is required to be able to fully apply these techniques. Pragmatically, the scaled application of these techniques requires the pre-pyrolysis wet chemistry to be simple and scalable. Further, there is a clear opportunity to correlate observed morphologies/phases and catalytic properties with findings from computational theoretical studies. Detailed characterisation throughout the synthetic process is essential and will undoubtedly provide fundamental insights that can be used for the controllable and scalable synthesis of metastable α-MoC1-x.
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Affiliation(s)
- Andrea De Zanet
- Department of Chemistry, Loughborough University, Loughborough, LE11 3TU, UK
| | - Simon A. Kondrat
- Department of Chemistry, Loughborough University, Loughborough, LE11 3TU, UK
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34
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Vega L, Viñes F. Generalized gradient approximation adjusted to transition metals properties: Key roles of exchange and local spin density. J Comput Chem 2020; 41:2598-2603. [PMID: 32901928 DOI: 10.1002/jcc.26415] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 08/18/2020] [Accepted: 08/18/2020] [Indexed: 01/18/2023]
Abstract
Perdew-Burke-Ernzerhof (PBE) and PBE adapted for solids (PBEsol) are exchange-correlation (xc) functionals widely used in density functional theory simulations. Their differences are the exchange, μ, and correlation, β, coefficients, causing PBEsol to lose the Local Spin Density (LSD) response. Here, the μ/β two-dimensional (2D) accuracy landscape is analyzed between PBE and PBEsol xc functional limits for 27 transition metal (TM) bulks, as well as for 81 TM surfaces. Several properties are analyzed, including the shortest interatomic distances, cohesive energies, and bulk moduli for TM bulks, and surface relaxation degree, surface energies, and work functions for TM surfaces. The exploration, comparing the accuracy degree with respect experimental values, reveals that the found xc minimum, called VV, being a PBE variant, represents an improvement of 5% in mean absolute percentage error terms, whereas this improvement reaches ~11% for VVsol, a xc resulting from the restoration of LSD response in PBEsol, and so regarded as its variant.
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Affiliation(s)
| | - Francesc Viñes
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Barcelona, Spain
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35
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Affiliation(s)
- Ángel Morales-García
- Departament de Ciència de Materials i Quı́mica Fı́sica & Institut de Quı́mica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martı́ i Franquès 1-11, 08028 Barcelona, Spain
| | - Federico Calle-Vallejo
- Departament de Ciència de Materials i Quı́mica Fı́sica & Institut de Quı́mica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martı́ i Franquès 1-11, 08028 Barcelona, Spain
| | - Francesc Illas
- Departament de Ciència de Materials i Quı́mica Fı́sica & Institut de Quı́mica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martı́ i Franquès 1-11, 08028 Barcelona, Spain
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36
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Ochoa E, Torres D, Pinilla J, Suelves I. Influence of carburization time on the activity of Mo2C/CNF catalysts for the HDO of guaiacol. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.03.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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37
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Zribi R, Neri G. Mo-Based Layered Nanostructures for the Electrochemical Sensing of Biomolecules. SENSORS (BASEL, SWITZERLAND) 2020; 20:E5404. [PMID: 32967188 PMCID: PMC7571038 DOI: 10.3390/s20185404] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 09/14/2020] [Accepted: 09/17/2020] [Indexed: 12/19/2022]
Abstract
Mo-based layered nanostructures are two-dimensional (2D) nanomaterials with outstanding characteristics and very promising electrochemical properties. These materials comprise nanosheets of molybdenum (Mo) oxides (MoO2 and MoO3), dichalcogenides (MoS2, MoSe2, MoTe2), and carbides (MoC2), which find application in electrochemical devices for energy storage and generation. In this feature paper, we present the most relevant characteristics of such Mo-based layered compounds and their use as electrode materials in electrochemical sensors. In particular, the aspects related to synthesis methods, structural and electronic characteristics, and the relevant electrochemical properties, together with applications in the specific field of electrochemical biomolecule sensing, are reviewed. The main features, along with the current status, trends, and potentialities for biomedical sensing applications, are described, highlighting the peculiar properties of Mo-based 2D-nanomaterials in this field.
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Affiliation(s)
| | - Giovanni Neri
- Department of Engineering, University of Messina, C.da Di Dio, I-98166 Messina, Italy;
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38
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Figueras M, Jurado A, Morales-García Á, Viñes F, Illas F. Bulk (in)stability as a possible source of surface reconstruction. Phys Chem Chem Phys 2020; 22:19249-19253. [PMID: 32814935 DOI: 10.1039/d0cp03819a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A density functional theory based study is presented with the aim of addressing the surface energy stabilization mechanisms of transition metal carbide and nitride surfaces from a crystal structure different from that of the most stable polymorph. To this end, we consider the MoC(001), MoN(001), WC(001), and WN(001) surface of rocksalt structures, which, for these compounds, is not the most stable one. The geometry optimization of suitable slab models shows that all these surfaces undergo a sensible reconstruction. The energy difference per formula unit between the rock salt and the most stable polymorph seems to be the driving force behind the observed reconstruction. A note of caution is given in that certain small periodic boundary conditions can artificially restrain such reconstructions, for which at least (2×2) supercells are needed. Also, it is shown that neglecting such a surface reconstruction can lead to artifacts in the prediction of the chemical activity and/or reactivity of these surfaces.
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Affiliation(s)
- Marc Figueras
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martí i Franquès 1-11, 08028 Barcelona, Spain.
| | - Anabel Jurado
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martí i Franquès 1-11, 08028 Barcelona, Spain.
| | - Ángel Morales-García
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martí i Franquès 1-11, 08028 Barcelona, Spain.
| | - Francesc Viñes
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martí i Franquès 1-11, 08028 Barcelona, Spain.
| | - Francesc Illas
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martí i Franquès 1-11, 08028 Barcelona, Spain.
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39
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Jun H, Kim S, Lee J. Development strategies in transition metal carbide for hydrogen evolution reaction: A review. KOREAN J CHEM ENG 2020. [DOI: 10.1007/s11814-020-0612-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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40
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Wakizaka M, Atqa A, Chun WJ, Imaoka T, Yamamoto K. Subnano-transformation of molybdenum carbide to oxycarbide. NANOSCALE 2020; 12:15814-15822. [PMID: 32691809 DOI: 10.1039/d0nr04495d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Ultrasmall particles exhibit structures and/or properties that are different from those of the corresponding bulk materials; in this context especially ultrasmall precious-metal particles have been extensively investigated. In this study, we targeted the transition base-metal Mo and succeeded in systematically producing Mo oxycarbide/carbide particles with diameters of 1.7 ± 0.7, 1.4 ± 0.5, 1.3 ± 0.4, 1.2 ± 0.3, 1.0 ± 0.3, and 0.8 ± 0.2 nm on a carbon support using the carbothermal hydrogen reduction method at 773 K and a diphenylazomethine-type dendrimer as a template. The formation and properties of the particles were confirmed using X-ray photoelectron spectroscopy, high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) images, and X-ray absorption fine structure (XAFS) studies. We found that Mo particles with a diameter of 1.3 nm or greater formed carbides such as β'-Mo2C, whereas smaller particles formed oxycarbides, indicating a size-dependent transformation in the phase or composition of the particles. Thus, this work demonstrated a new concept, subnano-transformation, which would be a new class of phase transformation based on the concept of the size dependence in such an ultrasmall scale. In addition, the movement of Mo atoms within a cluster and on the fringes of a nanoparticle was also demonstrated during continuous time-course high-resolution HAADF-STEM observation.
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Affiliation(s)
- Masanori Wakizaka
- Laboratory for Chemistry and Life Science Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan.
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41
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Chen X, Chen X, Qi J, Liang C. Self-assembly synthesis of lamellar molybdenum carbides with controllable phases for hydrodeoxygenation of diphenyl ether. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110972] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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42
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Morteo-Flores F, Engel J, Roldan A. Biomass hydrodeoxygenation catalysts innovation from atomistic activity predictors. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2020; 378:20200056. [PMID: 32623992 PMCID: PMC7422890 DOI: 10.1098/rsta.2020.0056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/22/2020] [Indexed: 06/11/2023]
Abstract
Circular economy emphasizes the idea of transforming products involving economic growth and improving the ecological system to reduce the negative consequences caused by the excessive use of raw materials. This can be achieved with the use of second-generation biomass that converts industrial and agricultural wastes into bulk chemicals. The use of catalytic processes is essential to achieve a viable upgrade of biofuels from the lignocellulosic biomass. We carried out density functional theory calculations to explore the relationship between 13 transition metals (TMs) properties, as catalysts, and their affinity for hydrogen and oxygen, as key species in the valourization of biomass. The relation of these parameters will define the trends of the hydrodeoxygenation (HDO) process on biomass-derived compounds. We found the hydrogen and oxygen adsorption energies in the most stable site have a linear relation with electronic properties of these metals that will rationalize the surface's ability to bind the biomass-derived compounds and break the C-O bonds. This will accelerate the catalyst innovation for low temperature and efficient HDO processes on biomass derivates, e.g. guaiacol and anisole, among others. Among the monometallic catalysts explored, the scaling relationship pointed out that Ni has a promising balance between hydrogen and oxygen affinities according to the d-band centre and d-band width models. The comparison of the calculated descriptors to the adsorption strength of guaiacol on the investigated surfaces indicates that the d-band properties alone are not best suited to describe the trend. Instead, we found that a linear combination of work function and d-band properties gives significantly better correlation. This article is part of a discussion meeting issue 'Science to enable the circular economy'.
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Affiliation(s)
| | | | - Alberto Roldan
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK
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43
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Zhou Y, Wang W, Zhang C, Huang D, Lai C, Cheng M, Qin L, Yang Y, Zhou C, Li B, Luo H, He D. Sustainable hydrogen production by molybdenum carbide-based efficient photocatalysts: From properties to mechanism. Adv Colloid Interface Sci 2020; 279:102144. [PMID: 32222608 DOI: 10.1016/j.cis.2020.102144] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 03/13/2020] [Accepted: 03/17/2020] [Indexed: 12/28/2022]
Abstract
Hydrogen is considered to be a promising energy carrier to solve the issue of energy crisis. Molybdenum carbide (MoxC) is the typical material, which has similar properties of Pt and thought to be an attractive alternative to noble metals for H2 evolution. The study of MoxC as alternative catalyst for H2 production is almost focused on electrocatalytic field, while the application of MoxC as a co-catalyst in photocatalytic H2 evolution has received in-depth research in recent years. Particularly, MoxC exhibits significant enhancement in the H2 production performance of semiconductors under visible light irradiation. However, a review discussing MoxC serving as a co-catalysts in the photocatalytic H2 evolution is still absent. Herein, the recent progress of MoxC on photocatalytic H2 evolution is reviewed. Firstly, the preparation methods including chemical vapor deposition, temperature programming, and organic-inorganic hybridization are detailly summarized. Then, the fundamental structure, electronic properties, and specific conductance of MoxC are illustrated to illuminate the advantages of MoxC as a co-catalyst for H2 evolution. Furthermore, the different heterojunctions formed between MoxC and other semiconductors for enhancing the photocatalytic performance are emphasized. Finally, perspectives regarding the current challenges and the future research directions on the improvement of catalytic performance of MoxC-based photocatalysts are also presented.
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Affiliation(s)
- Yin Zhou
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Wenjun Wang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Chen Zhang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China.
| | - Danlian Huang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China.
| | - Cui Lai
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Min Cheng
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Lei Qin
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Yang Yang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Chengyun Zhou
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Bisheng Li
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Hanzhuo Luo
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Donghui He
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
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44
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Jimenez-Orozco C, Flórez E, Viñes F, Rodriguez JA, Illas F. Critical Hydrogen Coverage Effect on the Hydrogenation of Ethylene Catalyzed by δ-MoC(001): An Ab Initio Thermodynamic and Kinetic Study. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00144] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Carlos Jimenez-Orozco
- Grupo de Materiales con Impacto (Mat&mpac), Facultad de Ciencias Básicas, Universidad de Medellı́n, Mat&mpac, Carrera 87 No 30-65, Medellín, Colombia
| | - Elizabeth Flórez
- Grupo de Materiales con Impacto (Mat&mpac), Facultad de Ciencias Básicas, Universidad de Medellı́n, Mat&mpac, Carrera 87 No 30-65, Medellín, Colombia
| | - Francesc Viñes
- Departament de Ciència de Materials i Quı́mica Fı́sica & Institut de Quı́mica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - José A. Rodriguez
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Francesc Illas
- Departament de Ciència de Materials i Quı́mica Fı́sica & Institut de Quı́mica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martí i Franquès 1-11, 08028 Barcelona, Spain
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45
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Yang TT, Saidi WA. Graphene Activation Explains the Enhanced Hydrogen Evolution on Graphene-Coated Molybdenum Carbide Electrocatalysts. J Phys Chem Lett 2020; 11:2759-2764. [PMID: 32188252 DOI: 10.1021/acs.jpclett.0c00615] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Molybdenum carbides (MoxC) have shown high catalytic activities toward hydrogen evolution reaction (HER) when coupled with graphene. Herein, we use density functional theory (DFT) calculations in conjunction with ab initio thermodynamics and electrochemical modeling on γ-MoC supported graphene to determine the origin of the enhanced HER activities. In addition to previous claims that graphene's main role is to prevent agglomeration of MoxC nanoparticles, we show that the interplay between γ-MoC coupling and graphene defect chemistry activates graphene for the HER. For γ-MoC supported graphene systems, the HER mechanism follows the Volmer-Heyrovsky pathway with the Heyrovsky reaction as the rate-determining step. To simulate the electrochemical linear sweep voltammetry at the device level, we develop a computational current model purely from the thermodynamic and kinetics descriptors obtained using DFT. This model shows that γ-MoC supported graphene with divacancies is optimum for HER with an exchange current density of ∼1 × 10-4 A/cm2 and Tafel slope of ∼50 mV/dec-1, which are in good agreement with experimental results.
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Affiliation(s)
- Timothy T Yang
- Department of Materials Science and Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Wissam A Saidi
- Department of Materials Science and Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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46
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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
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47
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Wang F, Li T, Shi Y, Jiao H. Molybdenum carbide supported metal catalysts (Mn/MoxC; M = Co, Ni, Cu, Pd, Pt) – metal and surface dependent structure and stability. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00504e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The surface and metal-dependent morphologies and energies of molybdenum carbide supported metal catalysts (Mn/MoxC; M = Co, Ni, Cu, Pd, Pt) have been systematically investigated on the basis of periodic density functional theory computations.
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Affiliation(s)
- Fan Wang
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rosteock
- Germany
| | - Teng Li
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan
- China
| | - Yun Shi
- School of Chemistry & Chemical Engineering
- Linyi University
- Linyi 276000
- China
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rosteock
- Germany
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48
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Figueras M, Gutiérrez RA, Prats H, Viñes F, Ramírez PJ, Illas F, Rodriguez JA. Boosting the activity of transition metal carbides towards methane activation by nanostructuring. Phys Chem Chem Phys 2020; 22:7110-7118. [PMID: 32202570 DOI: 10.1039/d0cp00228c] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Molybdenum carbide breaks methane by going nano.
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Affiliation(s)
- Marc Figueras
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Ramón A. Gutiérrez
- Chemistry Department
- Brookhaven National Laboratory
- New York 11973
- USA
- Facultad de Ciencias
| | - Hector Prats
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Francesc Viñes
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Pedro J. Ramírez
- Facultad de Ciencias
- Universidad Central de Venezuela
- Caracas 1020-A
- Venezuela
| | - Francesc Illas
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
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49
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Zhang T, Yang X, Ge Q. CH4 dissociation and C C coupling on Mo-terminated MoC surfaces: A DFT study. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.03.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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50
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Deng Y, Ge Y, Xu M, Yu Q, Xiao D, Yao S, Ma D. Molybdenum Carbide: Controlling the Geometric and Electronic Structure of Noble Metals for the Activation of O-H and C-H Bonds. Acc Chem Res 2019; 52:3372-3383. [PMID: 31411856 DOI: 10.1021/acs.accounts.9b00182] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In the field of heterogeneous catalysis, transition metal carbides (TMCs) have attracted growing and extensive attention as a group of important catalytic materials for a variety of energy-related reactions. Due to the incorporation of carbon atoms at the interstitial sites, TMCs possess much higher density of states near the Fermi level, endowing the material with noble-metal-like electron configuration and catalytic behaviors. Crystal structure, site occupancies, surface termination, and metal/carbon defects in the bulk phase or at the surface are the structural factors that influence the behavior of the TMCs in catalytic reactions. In the early studies of heterogeneous catalytic applications of TMCs, the carbide itself was used individually as the catalytically active site, which exhibited unique catalytic performance comparable to precious metal catalysts toward hydrogenation, dehydrogenation, isomerization, and hydrodeoxygenation. To promote the catalytic performance, the doping of secondary transition metals into the carbide lattice to form bimetallic carbides was extensively studied. As a recent development, the utilization of TMCs as functionalized catalyst supports has achieved a series of significant breakthroughs in low-temperature catalytic applications, including the reforming of alcohols, water-gas shift reactions, and the hydrogenation of functional groups for chemical production and biomass conversion. Generally, the excellence of TMCs as supports is attributed to three factors: the modulation of geometric and electronic structures of the supported metal centers, the special reactivity of TMC supports that accelerates certain elementary step and influences the surface coverage of intermediates, and the special interfacial properties at the metal-carbide interface that enhance the synergistic effect. In this Account, we will review recent discoveries from our group and other researchers on the special catalytic properties of face-centered cubic MoC (α-MoC) as both a special catalyst and a functional support that enables highly efficient low-temperature O-H bond activation for several important energy-related catalytic applications, including hydrogen evolution from aqueous phase methanol reforming, ultralow temperature water-gas shift reaction, and biomass conversion. In particular, α-MoC has been demonstrated to exhibit unprecedented strong interaction with the supported metals compared with other TMCs, which not only stabilizes the under-coordinated metal species (single atoms and layered clusters) under strong thermal perturbation and harsh reaction conditions but also tunes the charge density at the metal sites and modifies their catalytic behavior in C-H activation and CO chemisorption. We will discuss how to exploit the metal/α-MoC interaction and interfacial properties to construct CO-tolerant selective hydrogenation catalysts for nitroarene derivatives. Several examples of constructing bifunctional tandem catalytic systems using molybdenum carbides that enable hydrogen extraction and utilization in one-pot conversion of biomass substrates and Fischer-Tropsch synthesis are also highlighted.
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Affiliation(s)
- Yuchen Deng
- Beijing National Laboratory for Molecular Engineering, College of Chemistry and Molecular Engineering and College of Engineering, BIC-ESAT, Peking University, Beijing 100871, P. R. China
| | - Yuzhen Ge
- Beijing National Laboratory for Molecular Engineering, College of Chemistry and Molecular Engineering and College of Engineering, BIC-ESAT, Peking University, Beijing 100871, P. R. China
| | - Ming Xu
- Beijing National Laboratory for Molecular Engineering, College of Chemistry and Molecular Engineering and College of Engineering, BIC-ESAT, Peking University, Beijing 100871, P. R. China
| | - Qiaolin Yu
- Beijing National Laboratory for Molecular Engineering, College of Chemistry and Molecular Engineering and College of Engineering, BIC-ESAT, Peking University, Beijing 100871, P. R. China
| | - Dequan Xiao
- Center for Integrative Materials Discovery, Department of Chemistry and Chemical Engineering, University of New Haven, 300 Boston Post Road, West Haven, Connecticut 06516, United States
| | - Siyu Yao
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Ding Ma
- Beijing National Laboratory for Molecular Engineering, College of Chemistry and Molecular Engineering and College of Engineering, BIC-ESAT, Peking University, Beijing 100871, P. R. China
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