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Guo Z, Chen S, Yang B. Promoted coke resistance of Ni by surface carbon for the dry reforming of methane. iScience 2023; 26:106237. [PMID: 36936792 PMCID: PMC10018553 DOI: 10.1016/j.isci.2023.106237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/31/2023] [Accepted: 02/15/2023] [Indexed: 02/22/2023] Open
Abstract
Dry reforming of methane (DRM) is an efficient process to transform methane and carbon dioxide to syngas. Nickel could show good catalytic activity for DRM, whereas the deactivation of nickel surfaces by the formation of inert carbon structures is inevitable. In this study, we carry out a detailed investigation of the evolution and catalytic performance of the carbon-covered surface structure on Ni(100) with a combined density functional theory and microkinetic modeling approach. The results suggest that the pristine Ni(100) surface is prone to carbon deposition and accumulation under reaction conditions. Further studies show that over this carbon-covered reconstructed Ni(100) surface, a carbon-based Mars-van-Krevelen mechanism would be favored, and the activity and coke resistance is promoted. This surface state and reaction mechanism were rarely reported before and would provide more insights into the DRM process under real reaction conditions and would help design more stable Ni catalysts.
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Affiliation(s)
- Zhichao Guo
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Shuyue Chen
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Bo Yang
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
- Corresponding author
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2
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Effects of Site Geometry and Local Composition on Hydrogenation of Surface Carbon to Methane on Ni, Co, and NiCo Catalysts. Catalysts 2022. [DOI: 10.3390/catal12111380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Surface carbon deposits deactivate Ni and Co catalysts in reactions involving hydrocarbons and COx. Electronic properties, adsorption energies of H, C, and CHx species, and the energetics of the hydrogenation of surface C atom to methane are studied for (100) and (111) surfaces of monometallic Ni and Co, and bimetallic NiCo. The bimetallic catalyst exhibits a Co→Ni electron donation and a concomitant increase in the magnetization of Co atoms. The CHx species resulting from sequential hydrogenation are more stable on Co than on Ni atoms of the NiCo surfaces due to more favorable (C-H)–Co agostic interactions. These interactions and differences between Co and Ni sites are more significant for (111) than for (100) bimetallic surfaces. On (111) surfaces, CH is the most stable species, and the first hydrogenation of C atom exhibits the highest barrier, followed by the CH3 hydrogenation steps. In contrast, on (100) surfaces, surface C atom is the most stable species and CH2 or *CH3 hydrogenations exhibit the highest barriers. The Gibbs free energy profiles suggest that C removal on (111) surfaces is thermodynamically favorable and exhibits a lower barrier than on the (100) surfaces. Thus, the (100) surfaces, especially Ni(100), are more prone to C poisoning. The NiCo(100) surfaces exhibit weaker binding of C and CHx species than Ni(100) and Co(100), which improves C poisoning resistance and lowers hydrogenation barriers. These results show that the electronic effects of alloying Ni and Co strongly depend on the local site composition and geometry.
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3
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Das P, Khatun M, Anoop A, Chattaraj PK. CSi nGe 4-n2+ ( n = 1-3): prospective systems containing planar tetracoordinate carbon (ptC). Phys Chem Chem Phys 2022; 24:16701-16711. [PMID: 35770562 DOI: 10.1039/d2cp01494g] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Density functional theory (DFT) based calculations have been carried out to explore the potential energy surface (PES) of CSinGe4-n2+/+/0 (n = 1-3) systems. The global minimum structures in the di-cationic states (1a, 1b, and 1c) contain a planar tetracoordinate carbon (ptC). For the CSi2Ge22+ system, the second stable isomer (2b) also contains a ptC with 0.67 kcal mol-1 higher energy than that of the 1b ptC isomer. The global minima of the neutral and mono-cationic states of the designed systems are not planar. The 1a, 1b, and 1c structures follow the 18 valence electron rule. The relative energies of the low-lying isomers of CSiGe32+, CSi2Ge22+, and CSi3Ge2+ systems with respect to the global minima were calculated using the CCSD(T)/aug-cc-pVTZ method. Ab initio molecular dynamics simulations for 50 ps time indicate that all the global minimum structures (1a, 1b, and 1c) are kinetically stable at 300 K and 500 K temperatures. The natural bond orbital (NBO) analysis suggests strong σ-acceptance of the ptC from the four surrounding atoms and simultaneously π-donation occurs from the ptC center. The nucleus independent chemical shift (NICS) showed σ/π-dual aromaticity. We hope that the designed di-cationic systems may be viable in the gas phase.
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Affiliation(s)
- Prasenjit Das
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
| | - Maya Khatun
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
| | - Anakuthil Anoop
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
| | - Pratim Kumar Chattaraj
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
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4
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Li X, Lu S, Yi J, Shen L, Chen Z, Xue H, Qian Q, Yang MQ. Ultrathin Two-Dimensional ZnIn 2S 4/Ni x-B Heterostructure for High-Performance Photocatalytic Fine Chemical Synthesis and H 2 Generation. ACS APPLIED MATERIALS & INTERFACES 2022; 14:25297-25307. [PMID: 35605284 DOI: 10.1021/acsami.2c02367] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Photocatalytic H2 evolution coupled with organic transformation provides a new avenue to cooperatively produce clean fuels and fine chemicals, enabling a more efficient conversion of solar energy. Here, a novel two-dimensional (2D) heterostructure of ultrathin ZnIn2S4 nanosheets decorated with amorphous nickel boride (Nix-B) is prepared for simultaneous photocatalytic anaerobic H2 generation and aromatic aldehydes production. This ZnIn2S4/Nix-B catalyst elaborately combines the ultrathin structure advantage of the ZnIn2S4 semiconductor and the cocatalytic function of Nix-B. A high H2 production rate of 8.9 mmol h-1 g-1 is delivered over the optimal ZnIn2S4/Nix-B with a stoichiometric production of benzaldehyde, which is about 22 times higher than ZnIn2S4. Especially, the H2 evolution rate is much higher than the value (2.8 mmol h-1 g-1) of the traditional photocatalytic half reaction of H2 production with triethanolamine as a sacrificial agent. The apparent quantum yield reaches 24% at 420 nm, representing an advanced photocatalyst system. Moreover, compared with traditional sulfide, hydroxide, and even noble metal modified ZnIn2S4/M counterparts (M = NiS, Ni(OH)2, Pt), the ZnIn2S4/Nix-B also maintains markedly higher photocatalytic activity, showing a highly efficient and economical advantage of the Nix-B cocatalyst. This work sheds light on the exploration of 2D ultrathin semiconductors decorated with novel transition metal boride cocatalyst for efficient photocatalytic organic transformation integrated with solar fuel production.
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Affiliation(s)
- Xinwei Li
- College of Environmental Science and Engineering, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou 350007, P. R. China
| | - Suwei Lu
- College of Environmental Science and Engineering, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou 350007, P. R. China
| | - Jiayu Yi
- College of Environmental Science and Engineering, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou 350007, P. R. China
| | - Lijuan Shen
- College of Environmental Science and Engineering, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou 350007, P. R. China
| | - Zhihui Chen
- Hunan Key Laboratory of Nanophononics and Devices, School of Physics and Electronics, Central South University, 932 South Lushan Road, Changsha, Hunan 410083, P. R. China
| | - Hun Xue
- College of Environmental Science and Engineering, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou 350007, P. R. China
| | - Qingrong Qian
- College of Environmental Science and Engineering, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou 350007, P. R. China
| | - Min-Quan Yang
- College of Environmental Science and Engineering, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou 350007, P. R. China
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5
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Yang T, Ma R, Li J, Liu Y, Feng J, He Y, Li D. The Structural Decoration of Ru Catalysts by Boron for Enhanced Propane Dehydrogenation. FUNDAMENTAL RESEARCH 2022. [DOI: 10.1016/j.fmre.2022.04.012] [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] Open
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6
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Das P, Chattaraj PK. CSiGaAl 2 -/0 and CGeGaAl 2 -/0 having planar tetracoordinate carbon atoms in their global minimum energy structures. J Comput Chem 2022; 43:894-905. [PMID: 35322887 DOI: 10.1002/jcc.26845] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 02/20/2022] [Accepted: 03/09/2022] [Indexed: 11/12/2022]
Abstract
Density functional theory (DFT) is used to explore the structure, stability, and bonding in CSiGaAl2 -/0 and CGeGaAl2 -/0 systems having planar tetracoordinate carbon (ptC). The neutral systems have 17 valence electrons and the mono-anionic systems have 18 valence electrons. The ab initio molecular dynamics simulations for 2000 fs time at two different temperatures (300 and 500 K) supported the kinetic stability of the systems. From the natural bond orbital (NBO) analysis it is shown that there is a strong electron donation from the ligand atoms to the ptC atom. We have used Li+ ion for the neutralization of the mono-anionic systems and more interestingly it does not disrupt the planar structure. The most preferable site for binding of Li+ ion is along the AlAl bond in both of the mono-anionic systems. All the systems in this work have both σ and π aromaticity which is predicted from the computations of nucleus independent chemical shift (NICS). Although the anionic species obey the 18 valence electronic rule, the neutral systems break the rule with 17 valence electrons. However, both sets of systems are stable in the planar form. The bonding analysis of the systems includes molecular orbital, adaptive natural density partitioning (AdNDP), quantum theory of atoms in molecules (QTAIM), electron localization function (ELF) basin, and aromaticity analyses. The energy decomposition analysis (EDA) determines the interaction of Li+ ion with CSiGaAl2 - and CGeGaAl2 - in Li@SiGaAl2 and Li@GeGaAl2 , respectively.
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Affiliation(s)
- Prasenjit Das
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, India
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7
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Abstract
We have explored the chemical space of BAl4Mg−/0/+ for the first time and theoretically characterized several isomers with interesting bonding patterns. We have used chemical intuition and a cluster building method based on the tabu-search algorithm implemented in the Python program for aggregation and reaction (PyAR) to obtain the maximum number of possible stationary points. The global minimum geometries for the anion (1a) and cation (1c) contain a planar tetracoordinate boron (ptB) atom, whereas the global minimum geometry for the neutral (1n) exhibits a planar pentacoordinate boron (ppB) atom. The low-lying isomers of the anion (2a) and cation (3c) also contain a ppB atom. The low-lying isomer of the neutral (2n) exhibits a ptB atom. Ab initio molecular dynamics simulations carried out at 298 K for 2000 fs suggest that all isomers are kinetically stable, except the cation 3c. Simulations carried out at low temperatures (100 and 200 K) for 2000 fs predict that even 3c is kinetically stable, which contains a ppB atom. Various bonding analyses (NBO, AdNDP, AIM, etc.) are carried out for these six different geometries of BAl4Mg−/0/+ to understand the bonding patterns. Based on these results, we conclude that ptB/ppB scenarios are prevalent in these systems. Compared to the carbon counter-part, CAl4Mg−, here the anion (BAl4Mg−) obeys the 18 valence electron rule, as B has one electron fewer than C. However, the neutral and cation species break the rule with 17 and 16 valence electrons, respectively. The electron affinity (EA) of BAl4Mg is slightly higher (2.15 eV) than the electron affinity of CAl4Mg (2.05 eV). Based on the EA value, it is believed that these molecules can be identified in the gas phase. All the ptB/ppB isomers exhibit π/σ double aromaticity. Energy decomposition analysis predicts that the interaction between BAl4−/0/+ and Mg is ionic in all these six systems.
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8
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Stereomutation in Tetracoordinate Centers via Stabilization of Planar Tetracoordinated Systems. ATOMS 2021. [DOI: 10.3390/atoms9040079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The quest for stabilizing planar forms of tetracoordinate carbon started five decades ago and intends to achieve interconversion between [R]- and [S]-stereoisomers without breaking covalent bonds. Several strategies are successful in making the planar tetracoordinate form a minimum on its potential energy surface. However, the first examples of systems where stereomutation is possible were reported only recently. In this study, the possibility of neutral and dications of simple hydrocarbons (cyclopentane, cyclopentene, spiropentane, and spiropentadiene) and their counterparts with the central carbon atom replaced by elements from groups 13, 14, and 15 are explored using ab initio MP2 calculations. The energy difference between the tetrahedral and planar forms decreases from row II to row III or IV substituents. Additionally, aromaticity involving the delocalization of the lone pair on the central atom appears to help in further stabilizing the planar form compared to the tetrahedral form, especially for the row II substituents. We identified 11 systems where the tetrahedral state is a minimum on the potential energy surface, and the planar form is a transition state corresponding to stereomutation. Interestingly, the planar structures of three systems were found to be minimum, and the corresponding tetrahedral states were transition states. The energy profiles corresponding to such transitions involving both planar and tetrahedral states without the breaking of covalent bonds were examined. The systems showcased in this study and research in this direction are expected to realize molecules that experimentally exhibit stereomutation.
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9
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In Silico Studies on Selected Neutral Molecules, CGa2Ge2, CAlGaGe2, and CSiGa2Ge Containing Planar Tetracoordinate Carbon. ATOMS 2021. [DOI: 10.3390/atoms9030065] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Density functional theory (DFT) was used to study the structure, stability, and bonding in some selected neutral pentaatomic systems, viz., CGa2Ge2, CAlGaGe2, and CSiGa2Ge containing planar tetracoordinate carbon. The systems are kinetically stable, as predicted from the ab initio molecular dynamics simulations. The natural bond orbital (NBO) analysis showed that strong electron donation occurs to the central planar carbon atom by the peripheral atoms in all the studied systems. From the nucleus independent chemical shift (NICS) analysis, it is shown that the systems possess both σ- and π- aromaticity. The presence of 18 valence electrons in these systems, in their neutral form, appears to be important for their stability with planar geometries rather than tetrahedral structures. The nature of bonding is understood through the adaptive natural density partitioning analysis (AdNDP), quantum theory of atoms in molecules (QTAIM) analysis, and also via Wiberg bond index (WBI) and electron localization function (ELF).
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10
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Moraru IT, Martínez-Prieto LM, Coppel Y, Chaudret B, Cusinato L, Del Rosal I, Poteau R. A combined theoretical/experimental study highlighting the formation of carbides on Ru nanoparticles during CO hydrogenation. NANOSCALE 2021; 13:6902-6915. [PMID: 33885491 DOI: 10.1039/d0nr08735a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Formation of stable carbides during CO bond dissociation on small ruthenium nanoparticles (RuNPs) is demonstrated, both by means of DFT calculations and by solid state 13C NMR techniques. Theoretical calculations of chemical shifts in several model clusters are employed in order to secure experimental spectroscopic assignations for surface ruthenium carbides. Mechanistic DFT investigations, carried out on a realistic Ru55 nanoparticle model (∼1 nm) in terms of size, structure and surface composition, reveal that ruthenium carbides are obtained during CO hydrogenation. Calculations also indicate that carbide formation via hydrogen-assisted hydroxymethylidyne (COH) pathways is exothermic and occurs at reasonable kinetic cost on standard sites of the RuNPs, such as 4-fold ones on flat terraces, and not only in steps as previously suggested. Another novel outcome of the DFT mechanistic study consists of the possible formation of μ6 ruthenium carbides in the tip-B5 site, similar examples being known only for molecular ruthenium clusters. Moreover, based on DFT energies, the possible rearrangement of the surface metal atoms around the same tip-site results in a μ-Ru atom coordinated to the remaining RuNP moiety, reminiscent of a pseudo-octahedral metal center on the NP surface.
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Affiliation(s)
- Ionut-Tudor Moraru
- Université de Toulouse; INSA, UPS, CNRS; LPCNO (IRSAMC), 135 avenue de Rangueil, F-31077 Toulouse, France.
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11
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Abstract
Isomers of CAl4Mg and CAl4Mg− have been theoretically characterized for the first time. The most stable isomer for both the neutral and anion contain a planar tetracoordinate carbon (ptC) atom. Unlike the isovalent CAl4Be case, which contains a planar pentacoordinate carbon atom as the global minimum geometry, replacing beryllium with magnesium makes the ptC isomer the global minimum due to increased ionic radii of magnesium. However, it is relatively easier to conduct experimental studies for CAl4Mg0/− as beryllium is toxic. While the neutral molecule containing the ptC atom follows the 18 valence electron rule, the anion breaks the rule with 19 valence electrons. The electron affinity of CAl4Mg is in the range of 1.96–2.05 eV. Both the global minima exhibit π/σ double aromaticity. Ab initio molecular dynamics simulations were carried out for both the global minima at 298 K for 10 ps to confirm their kinetic stability.
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12
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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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13
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Abstract
Dissociation pathways of the global minimum geometry of Si2C5H2 with a planar tetracoordinate carbon (ptC) atom, 2,7-disilatricyclo[4.1.0.01,3]hept-2,4,6-trien-2,7-diyl (1), have been theoretically investigated using density functional theory and coupled-cluster (CC) methods. Dissociation of Si-C bond connected to the ptC atom leads to the formation of 4,7-disilabicyclo[4.1.0]hept-1(6),4(5)-dien-2-yn-7-ylidene (4) through a single transition state. Dissociation of C-C bond connected to the ptC atom leads to an intermediate with two identical transition states and leads back to 1 itself. Simultaneous breaking of both Si-C and C-C bonds leads to an acyclic transition state, which forms an acyclic product, cis-1,7-disilahept-1,2,3,5,6-pentaen-1,7-diylidene (19). Overall, two different products, four transition states, and an intermediate have been identified at the B3LYP/6-311++G(2d,2p) level of theory. Intrinsic reaction coordinate calculations have also been done at the latter level to confirm the isomerization pathways. CC calculations have been done at the CCSD(T)/cc-pVTZ level of theory for all minima. Importantly, all reaction profiles for 1 are found be endothermic in Si2C5H2. These results are in stark contrast compared to the structurally similar and isovalent lowest-energy isomer of C7H2 with a ptC atom as the overall reaction profiles there have been found to be exothermic. The activation energies for Si-C, C-C, and Si-C/C-C breaking are found to be 30.51, 64.05, and 61.85 kcal mol−1, respectively. Thus, it is emphasized here that 1 is a kinetically stable molecule. However, it remains elusive in the laboratory to date. Therefore, energetic and spectroscopic parameters have been documented here, which may be of relevance to molecular spectroscopists in identifying this key anti-van’t-Hoff-Le Bel molecule.
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14
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Davis HJ, Häussinger D, Ward TR, Okamoto Y. A Visible-Light Promoted Amine Oxidation Catalyzed by a Cp*Ir Complex. ChemCatChem 2020; 12:4512-4516. [PMID: 33777249 PMCID: PMC7984327 DOI: 10.1002/cctc.202000488] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 06/11/2020] [Indexed: 12/21/2022]
Abstract
Through a rapid screening of Cp*Ir complexes based on a turn-on type fluorescence readout, a [Cp*Ir(dipyrido[3,2-a : 2',3'-c]phenazine)Cl]+ complex was found to catalyze the blue-light promoted dehydrogenation of N-heterocycles under physiological conditions. In the dehydrogenation of tetrahydroisoquinolines, the catalyst preferentially yielded the monodehydrogenated product, accompanying H2O2 generation. We surmise that this mechanism may be reminiscent of flavin-dependent oxidases.
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Affiliation(s)
- Holly Jane Davis
- Department of ChemistryUniversity of BaselMattenstrasse 24a BRP 1096 RosentalCH-4058BaselSwitzerland
| | - Daniel Häussinger
- Department of ChemistryUniversity of BaselSt. Johanns-Ring 19CH-4056BaselSwitzerland
| | - Thomas R. Ward
- Department of ChemistryUniversity of BaselMattenstrasse 24a BRP 1096 RosentalCH-4058BaselSwitzerland
| | - Yasunori Okamoto
- Department of ChemistryUniversity of BaselMattenstrasse 24a BRP 1096 RosentalCH-4058BaselSwitzerland
- Frontier Research Institute for Interdisciplinary SciencesTohoku University6-3 Aramaki aza AobaAoba-kuSendai980-8578Japan
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15
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Aly M, Fornero EL, Leon-Garzon AR, Galvita VV, Saeys M. Effect of Boron Promotion on Coke Formation during Propane Dehydrogenation over Pt/γ-Al2O3 Catalysts. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05548] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mostafa Aly
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 125, Gent B-9052, Belgium
| | - Esteban L. Fornero
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 125, Gent B-9052, Belgium
- Instituto de Desarrollo Tecnológico para la Industria Quı́mica (INTEC), UNL/CONICET, Güemes 3450, S3000 GLN Santa Fe, Argentina
| | - Andres R. Leon-Garzon
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 125, Gent B-9052, Belgium
| | - Vladimir V. Galvita
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 125, Gent B-9052, Belgium
| | - Mark Saeys
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 125, Gent B-9052, Belgium
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16
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Hu Z, Qian G, Li S, Yang L, Chen X, Weng M, Tan W, Pan F. Discovery of space aromaticity in transition-metal monoxide crystal Nb 3O 3 enabled by octahedral Nb 6 structural units. Sci Bull (Beijing) 2020; 65:367-372. [PMID: 36659227 DOI: 10.1016/j.scib.2019.10.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 09/27/2019] [Accepted: 10/21/2019] [Indexed: 01/21/2023]
Abstract
An octahedral Nb6 structural unit with space aromaticity is identified for the first time in a transition-metal monoxide crystal Nb3O3 by ab initio calculations. The strong Nb-Nb metallic bonding facilitates the formation of stable octahedral Nb6 structural units and the release of delocalization energy. Moreover, the Nb atoms in continuously connected Nb6 structural units share their electrons with each other in a continuous space of framework, so that the electrons are uniformly distributed. The newly discovered aromaticity in the octahedral Nb6 structural units extends the range of aromatic compounds and broadens our vision in structural chemistry.
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Affiliation(s)
- Zongxiang Hu
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, China
| | - Guoyu Qian
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, China
| | - Shunning Li
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, China
| | - Luyi Yang
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, China
| | - Xin Chen
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, China
| | - Mouyi Weng
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, China
| | - Wenchang Tan
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, China
| | - Feng Pan
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, China.
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17
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Cui X, Li W, Junge K, Fei Z, Beller M, Dyson PJ. Selective Acceptorless Dehydrogenation of Primary Amines to Imines by Core-Shell Cobalt Nanoparticles. Angew Chem Int Ed Engl 2020; 59:7501-7507. [PMID: 32049401 PMCID: PMC7217016 DOI: 10.1002/anie.201915526] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 01/16/2020] [Indexed: 01/25/2023]
Abstract
Core–shell nanocatalysts are attractive due to their versatility and stability. Here, we describe cobalt nanoparticles encapsulated within graphitic shells prepared via the pyrolysis of a cationic poly‐ionic liquid (PIL) with a cobalt(II) chloride anion. The resulting material has a core–shell structure that displays excellent activity and selectivity in the self‐dehydrogenation and hetero‐dehydrogenation of primary amines to their corresponding imines. Furthermore, the catalyst exhibits excellent activity in the synthesis of secondary imines from substrates with various reducible functional groups (C=C, C≡C and C≡N) and amino acid derivatives.
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Affiliation(s)
- Xinjiang Cui
- Institute of Chemical Sciences and Engineering, École Polytechnique Fedérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Wu Li
- Leibniz-Institute for Catalysis, Albert Einstein Str. 29a, 18059, Rostock, Germany
| | - Kathrin Junge
- Leibniz-Institute for Catalysis, Albert Einstein Str. 29a, 18059, Rostock, Germany
| | - Zhaofu Fei
- Institute of Chemical Sciences and Engineering, École Polytechnique Fedérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Matthias Beller
- Leibniz-Institute for Catalysis, Albert Einstein Str. 29a, 18059, Rostock, Germany
| | - Paul J Dyson
- Institute of Chemical Sciences and Engineering, École Polytechnique Fedérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
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18
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De Vrieze JE, Bremmer GM, Aly M, Navarro V, Thybaut JW, Kooyman PJ, Saeys M. Shape of Cobalt and Platinum Nanoparticles Under a CO Atmosphere: A Combined In Situ TEM and Computational Catalysis Study. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01840] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jenoff E. De Vrieze
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
| | - G. Marien Bremmer
- Huygens-Kamerlingh Onnes Laboratory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
| | - Mostafa Aly
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
| | - Violeta Navarro
- Huygens-Kamerlingh Onnes Laboratory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
| | - Joris W. Thybaut
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
| | - Patricia J. Kooyman
- Catalysis Institute, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa
| | - Mark Saeys
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
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19
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Sarkar C, Pendem S, Shrotri A, Dao DQ, Pham Thi Mai P, Nguyen Ngoc T, Chandaka DR, Rao TV, Trinh QT, Sherburne MP, Mondal J. Interface Engineering of Graphene-Supported Cu Nanoparticles Encapsulated by Mesoporous Silica for Size-Dependent Catalytic Oxidative Coupling of Aromatic Amines. ACS APPLIED MATERIALS & INTERFACES 2019; 11:11722-11735. [PMID: 30838855 DOI: 10.1021/acsami.8b18675] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In this study, graphene nanosheet-supported ultrafine Cu nanoparticles (NPs) encapsulated with thin mesoporous silica (Cu-GO@m-SiO2) materials are fabricated with particle sizes ranging from 60 to 7.8 nm and are systematically investigated for the oxidative coupling of amines to produce biologically and pharmaceutically important imine derivatives. Catalytic activity remarkably increased from 76.5% conversion of benzyl amine for 60 nm NPs to 99.3% conversion and exclusive selectivity of N-benzylidene-1-phenylmethanamine for 7.8 nm NPs. The superior catalytic performance along with the outstanding catalyst stability of newly designed catalysts are attributed to the easy diffusion of organic molecules through the porous channel of mesoporous SiO2 layers, which not only restricts the restacking of the graphene nanosheets but also prevents the sintering and leaching of metal NPs to an extreme extent through the nanoconfinement effect. Density functional theory calculations were performed to shed light on the reaction mechanism and to give insight into the trend of catalytic activity observed. The computed activation barriers of all elementary steps are very high on terrace Cu(111) sites, which dominate the large-sized Cu NPs, but are significantly lower on step sites, which are presented in higher density on smaller-sized Cu NPs and could explain the higher activity of smaller Cu-GO@m-SiO2 samples. In particular, the activation barrier for the elementary coupling reaction is reduced from 139 kJ/mol on flat terrace Cu(111) sites to the feasible value of 94 kJ/mol at step sites, demonstrating the crucial role of the step site in facilitating the formation of secondary imine products.
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Affiliation(s)
- Chitra Sarkar
- Catalysis & Fine Chemicals Division , CSIR-Indian Institute of Chemical Technology , Uppal Road , Hyderabad 500007 , India
| | - Saikiran Pendem
- Catalysis & Fine Chemicals Division , CSIR-Indian Institute of Chemical Technology , Uppal Road , Hyderabad 500007 , India
| | - Abhijit Shrotri
- Institute for Catalysis , Hokkaido University , Kita 21 Nishi 10 , Kita-Ku, Sapporo 001-0021 , Japan
| | - Duy Quang Dao
- Institute of Research and Development , Duy Tan University , 03 Quang Trung , Danang 550000 , Vietnam
| | | | | | - Dhanunjaya Rao Chandaka
- Catalysis & Fine Chemicals Division , CSIR-Indian Institute of Chemical Technology , Uppal Road , Hyderabad 500007 , India
| | - Tumula Venkateshwar Rao
- Catalysis & Fine Chemicals Division , CSIR-Indian Institute of Chemical Technology , Uppal Road , Hyderabad 500007 , India
| | - Quang Thang Trinh
- Institute of Research and Development , Duy Tan University , 03 Quang Trung , Danang 550000 , Vietnam
- Cambridge Centre for Advanced Research and Education in Singapore (CARES) , Campus for Research Excellence and Technological Enterprise (CREATE) , 1 Create Way , 138602 , Singapore
| | - Matthew P Sherburne
- A Singapore Berkeley Research Initiative for Sustainable Energy , Berkeley Educational Alliance for Research in Singapore , 1 Create Way , 138602 , Singapore
- Materials Science and Engineering Department , University of California, Berkeley , Berkeley , California 94720 , United States
| | - John Mondal
- Catalysis & Fine Chemicals Division , CSIR-Indian Institute of Chemical Technology , Uppal Road , Hyderabad 500007 , India
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20
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De Vrieze JE, Gunasooriya GTKK, Thybaut JW, Saeys M. Operando computational catalysis: shape, structure, and coverage under reaction conditions. Curr Opin Chem Eng 2019. [DOI: 10.1016/j.coche.2019.03.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Carbon Permeation: The Prerequisite Elementary Step in Iron-Catalyzed Fischer–Tropsch Synthesis. Catal Letters 2019. [DOI: 10.1007/s10562-018-02651-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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22
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Foppa L, Iannuzzi M, Copéret C, Comas-Vives A. Adlayer Dynamics Drives CO Activation in Ru-Catalyzed Fischer–Tropsch Synthesis. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01232] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lucas Foppa
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Marcella Iannuzzi
- Institute of Physical Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Aleix Comas-Vives
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
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23
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Consorted Vinylene Mechanism for Cobalt Fischer–Tropsch Synthesis Encompassing Water or Hydroxyl Assisted CO-Activation. Top Catal 2018. [DOI: 10.1007/s11244-018-0932-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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24
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Shoshani MM, Beck R, Wang X, McLaughlin MJ, Johnson SA. Synthesis of Surface-Analogue Square-Planar Tetranuclear Nickel Hydride Clusters and Bonding to μ4-NR, -O and -BH Ligands. Inorg Chem 2017; 57:2438-2446. [DOI: 10.1021/acs.inorgchem.7b02546] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Manar M. Shoshani
- Department of Chemistry and Biochemistry, University of Windsor, Sunset Avenue 401, Windsor, Ontario N9B 3P4, Canada
| | - Robert Beck
- Department of Chemistry and Biochemistry, University of Windsor, Sunset Avenue 401, Windsor, Ontario N9B 3P4, Canada
| | - Xiaoping Wang
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Matthew J. McLaughlin
- Department of Chemistry and Biochemistry, University of Windsor, Sunset Avenue 401, Windsor, Ontario N9B 3P4, Canada
| | - Samuel A. Johnson
- Department of Chemistry and Biochemistry, University of Windsor, Sunset Avenue 401, Windsor, Ontario N9B 3P4, Canada
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25
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Pecher L, Laref S, Raupach M, Tonner R. Ether auf Si(001): Ein Paradebeispiel für die Gemeinsamkeiten zwischen Oberflächenwissenschaften und organischer Molekülchemie. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707428] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Lisa Pecher
- Fachbereich Chemie und WZMW; Philipps-Universität Marburg; Hans-Meerwein-Str. 4 35032 Marburg Deutschland
| | - Slimane Laref
- Fachbereich Chemie und WZMW; Philipps-Universität Marburg; Hans-Meerwein-Str. 4 35032 Marburg Deutschland
- King Abdullah University of Science and Technology (KAUST); Physical Science and Engineering Division (PSE); Thuwal 23955 Saudi Arabien
| | - Marc Raupach
- Fachbereich Chemie und WZMW; Philipps-Universität Marburg; Hans-Meerwein-Str. 4 35032 Marburg Deutschland
| | - Ralf Tonner
- Fachbereich Chemie und WZMW; Philipps-Universität Marburg; Hans-Meerwein-Str. 4 35032 Marburg Deutschland
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26
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Pecher L, Laref S, Raupach M, Tonner R. Ethers on Si(001): A Prime Example for the Common Ground between Surface Science and Molecular Organic Chemistry. Angew Chem Int Ed Engl 2017; 56:15150-15154. [DOI: 10.1002/anie.201707428] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Lisa Pecher
- Faculty of Chemistry and Material Sciences Center; Philipps-Universität Marburg; Hans-Meerwein-Strasse 4 35032 Marburg Germany
| | - Slimane Laref
- Faculty of Chemistry and Material Sciences Center; Philipps-Universität Marburg; Hans-Meerwein-Strasse 4 35032 Marburg Germany
- Current address: King Abdullah University of Science and Technology (KAUST); Physical Science and Engineering Division (PSE); Thuwal 23955 Saudi Arabia
| | - Marc Raupach
- Faculty of Chemistry and Material Sciences Center; Philipps-Universität Marburg; Hans-Meerwein-Strasse 4 35032 Marburg Germany
| | - Ralf Tonner
- Faculty of Chemistry and Material Sciences Center; Philipps-Universität Marburg; Hans-Meerwein-Strasse 4 35032 Marburg Germany
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27
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Ha MA, Baxter ET, Cass AC, Anderson SL, Alexandrova AN. Boron Switch for Selectivity of Catalytic Dehydrogenation on Size-Selected Pt Clusters on Al2O3. J Am Chem Soc 2017; 139:11568-11575. [DOI: 10.1021/jacs.7b05894] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mai-Anh Ha
- Department of Chemistry & Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Eric T. Baxter
- Department
of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Ashley C. Cass
- Department
of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Scott L. Anderson
- Department
of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Anastassia N. Alexandrova
- Department of Chemistry & Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, Los Angeles, California 90095, United States
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28
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Shoshani MM, Johnson SA. Cooperative carbon-atom abstraction from alkenes in the core of a pentanuclear nickel cluster. Nat Chem 2017. [DOI: 10.1038/nchem.2840] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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29
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Banerjee A, van Bavel AP, Kuipers HPCE, Saeys M. CO Activation on Realistic Cobalt Surfaces: Kinetic Role of Hydrogen. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00846] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Arghya Banerjee
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117576
| | | | | | - Mark Saeys
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
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30
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Liu CS, Zhu HH, Ye XJ, Yan XH. Prediction of a new BeC monolayer with perfectly planar tetracoordinate carbons. NANOSCALE 2017; 9:5854-5858. [PMID: 28429807 DOI: 10.1039/c7nr00762k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Recently, there has been a growing interest in exploring planar hypercoordinate carbons in two-dimensional nanostructures. However, atomic monolayers with ideal planar hypercoordinate carbon are quite rare due to the challenge in stabilizing the exotic motifs. We predicted a global minimum two-dimensional BeC monolayer using the global particle-swarm optimization method. Each carbon binds peripheral four atoms in the same plane, forming a perfectly planar tetracoordinate carbon moiety. The cohesive energy, phonon-spectrum and mechanical stability criteria confirm the stability of monolayer BeC. In addition, the BeC monolayer has a large in-plane stiffness (145.54 N m-1) and thermo-dynamical stability (up to 2000 K). Furthermore, BeC is an indirect semiconductor with a band gap of 1.01 eV and possesses exceptionally high carrier mobilities (∼104 cm2 V-1 s-1), rendering it suitable for application in electronics and photoelectronics.
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Affiliation(s)
- Chun-Sheng Liu
- Key Laboratory of Radio Frequency and Micro-Nano Electronics of Jiangsu Province, College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
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31
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Wang H, Cao Y, Zou G, Yi Q, Guo J, Gao L. High-Performance Hydrogen Evolution Electrocatalyst Derived from Ni 3C Nanoparticles Embedded in a Porous Carbon Network. ACS APPLIED MATERIALS & INTERFACES 2017; 9:60-64. [PMID: 28005323 DOI: 10.1021/acsami.6b14393] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this letter, we report a facile self-foaming strategy to synthesize Ni3C nanoparticles embedded in a porous carbon network (Ni3C@PCN) by rationally incorporating a nickel salt precursor into the carbon source. As a novel hydrogen evolution reaction (HER) catalyst, the Ni3C@PCN shows superior catalytic activity with an onset potential of -65 mV, an overpotential of 262 mV to achieve 50 mA cm-2 current density, a Tafel slope of 63.4 mV/dec, and durability over 12 h in acidic media. The excellent performance of the novel 3D composite material along with its low-cost merits is suggestive of great potential for scalable electrocatalytic H2 production.
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Affiliation(s)
- Hao Wang
- College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215006, China
| | - Yingjie Cao
- College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215006, China
| | - Guifu Zou
- College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215006, China
| | - Qinghua Yi
- College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215006, China
| | - Jun Guo
- Testing and Analysis Center, Soochow University , Suzhou 215123, China
| | - Lijun Gao
- College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215006, China
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32
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Singuru R, Trinh QT, Banerjee B, Govinda Rao B, Bai L, Bhaumik A, Reddy BM, Hirao H, Mondal J. Integrated Experimental and Theoretical Study of Shape-Controlled Catalytic Oxidative Coupling of Aromatic Amines over CuO Nanostructures. ACS OMEGA 2016; 1:1121-1138. [PMID: 31457184 PMCID: PMC6640819 DOI: 10.1021/acsomega.6b00331] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 11/24/2016] [Indexed: 05/30/2023]
Abstract
We have synthesized CuO nanostructures with flake, dandelion-microsphere, and short-ribbon shapes using solution-phase methods and have evaluated their structure-performance relationship in the heterogeneous catalysis of liquid-phase oxidative coupling reactions. The formation of nanostructures and the morphological evolution were confirmed by transmission electron microscopy, scanning electron microscopy, X-ray diffraction analysis, X-ray photoelectron spectroscopy, Raman spectroscopy, energy-dispersive X-ray spectroscopy, elemental mapping analysis, and Fourier transform infrared spectroscopy. CuO nanostructures with different morphologies were tested for the catalytic oxidative coupling of aromatic amines to imines under solvent-free conditions. We found that the flake-shaped CuO nanostructures exhibited superior catalytic efficiency compared to that of the dandelion- and short-ribbon-shaped CuO nanostructures. We also performed extensive density functional theory (DFT) calculations to gain atomic-level insight into the intriguing reactivity trends observed for the different CuO nanostructures. Our DFT calculations provided for the first time a detailed and comprehensive view of the oxidative coupling reaction of benzylamine over CuO, which yields N-benzylidene-1-phenylmethanamine as the major product. CuO(111) is identified as the reactive surface; the specific arrangement of coordinatively unsaturated Cu and O sites on the most stable CuO(111) surface allows N-H and C-H bond-activation reactions to proceed with low-energy barriers. The high catalytic activity of the flake-shaped CuO nanostructure can be attributed to the greatest exposure of the active CuO(111) facets. Our finding sheds light on the prospective utility of inexpensive CuO nanostructured catalysts with different morphologies in performing solvent-free oxidative coupling of aromatic amines to obtain biologically and pharmaceutically important imine derivatives with high selectivity.
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Affiliation(s)
- Ramana Singuru
- Inorganic
and Physical Chemistry Division, CSIR-Indian
Institute of Chemical Technology, Uppal Road, Hyderabad 500607, India
| | - Quang Thang Trinh
- Cambridge
Centre for Advanced Research and Education in Singapore, Nanyang Technological University, 1 Create Way, Singapore 138602, Singapore
| | - Biplab Banerjee
- Department
of Materials Science, Indian Association
for the Cultivation of Science, 2A & 2B Raja S C Mullick Road, Jadavpur, Kolkata 700032, India
| | - Bolla Govinda Rao
- Inorganic
and Physical Chemistry Division, CSIR-Indian
Institute of Chemical Technology, Uppal Road, Hyderabad 500607, India
| | - Linyi Bai
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Asim Bhaumik
- Department
of Materials Science, Indian Association
for the Cultivation of Science, 2A & 2B Raja S C Mullick Road, Jadavpur, Kolkata 700032, India
| | - Benjaram Mahipal Reddy
- Inorganic
and Physical Chemistry Division, CSIR-Indian
Institute of Chemical Technology, Uppal Road, Hyderabad 500607, India
| | - Hajime Hirao
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - John Mondal
- Inorganic
and Physical Chemistry Division, CSIR-Indian
Institute of Chemical Technology, Uppal Road, Hyderabad 500607, India
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33
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Foppa L, Copéret C, Comas-Vives A. Increased Back-Bonding Explains Step-Edge Reactivity and Particle Size Effect for CO Activation on Ru Nanoparticles. J Am Chem Soc 2016; 138:16655-16668. [DOI: 10.1021/jacs.6b08697] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lucas Foppa
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Christophe Copéret
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Aleix Comas-Vives
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
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34
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Mondal J, Trinh QT, Jana A, Ng WKH, Borah P, Hirao H, Zhao Y. Size-Dependent Catalytic Activity of Palladium Nanoparticles Fabricated in Porous Organic Polymers for Alkene Hydrogenation at Room Temperature. ACS APPLIED MATERIALS & INTERFACES 2016; 8:15307-19. [PMID: 27258184 DOI: 10.1021/acsami.6b03127] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Ultrafine palladium nanoparticles (Pd NPs) with 8 and 3 nm sizes were effectively fabricated in triazine functionalized porous organic polymer (POP) TRIA that was developed by nonaqueous polymerization of 2,4,6-triallyoxy-1,3,5-triazine. The Pd NPs encapsulated POP (Pd-POP) was fully characterized using several techniques. Further studies revealed an excellent capability of Pd-POP for catalytic transfer hydrogenation of alkenes at room temperature with superior catalytic performance and high selectivity of desired products. Highly flammable H2 gas balloon at high pressure and temperature used in conventional hydrogenation reactions was not needed in the present synthetic system. Catalytic activity is strongly dependent on the size of encapsulated Pd NPs in the POP. The Pd-POP catalyst with Pd NPs of 8 nm in diameter exhibited higher catalytic activity for alkene hydrogenation as compared with the Pd-POP catalyst encapsulating 3 nm Pd NPs. Computational studies were undertaken to gain insights into different catalytic activities of these two Pd-POP catalysts. High reusability and stability as well as no Pd leaching of these Pd-POP catalysts make them highly applicable for hydrogenation reactions at room temperature.
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Affiliation(s)
- John Mondal
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, 637371, Singapore
- Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology , Uppal Road, Hyderabad 500007, India
| | - Quang Thang Trinh
- School of Chemical and Biomedical Engineering, Nanyang Technological University , 62 Nanyang Drive, 637459, Singapore
| | - Avijit Jana
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, 637371, Singapore
- Biomaterials Group, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007, India
| | - Wilson Kwok Hung Ng
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, 637371, Singapore
| | - Parijat Borah
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, 637371, Singapore
| | - Hajime Hirao
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, 637371, Singapore
| | - Yanli Zhao
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, 637371, Singapore
- School of Materials Science and Engineering, Nanyang Technological University , 50 Nanyang Avenue, 639798, Singapore
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35
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Banerjee A, Navarro V, Frenken JWM, van Bavel AP, Kuipers HPCE, Saeys M. Shape and Size of Cobalt Nanoislands Formed Spontaneously on Cobalt Terraces during Fischer-Tropsch Synthesis. J Phys Chem Lett 2016; 7:1996-2001. [PMID: 27176712 DOI: 10.1021/acs.jpclett.6b00555] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Cobalt-based catalysts undergo a massive and spontaneous reconstruction to form uniform triangular nanoislands under Fischer-Tropsch (FT) conditions. This reconstruction is driven by the unusual and synergistic adsorption of square-planar carbon and CO at the 4-fold edge sites of the nanoislands, driving the formation of triangular islands. The size of the nanoislands is determined by the balance between energy gain from creating C/CO-covered edges and energy penalty to create C/CO-covered corners. For carbon chemical potentials corresponding to FT conditions, triangular Co islands with 45 Co atoms (about 2 nm) are the most stable surface structure. Decreasing the carbon chemical potential and hence the stability of square-planar carbon favors the formation of larger islands, until reconstruction becomes unfavorable and CO-covered terraces are thermodynamically the most stable. The predicted structure of the islands is consistent with in situ scanning tunneling microscopy images obtained for the first time under realistic FT reaction conditions on a Co(0001) surface.
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Affiliation(s)
- Arghya Banerjee
- Department of Chemical and Biomolecular Engineering, 4 Engineering Drive 4, National University of Singapore , Singapore 117576
| | - Violeta Navarro
- Kamerlingh Onnes Laboratory, Leiden University , Niels Bohrweg 2, 2333CA Leiden, The Netherlands
| | - Joost W M Frenken
- Kamerlingh Onnes Laboratory, Leiden University , Niels Bohrweg 2, 2333CA Leiden, The Netherlands
| | - Alexander P van Bavel
- Shell Technology Centre Amsterdam , P.O. Box 38000, 1030 BN Amsterdam, The Netherlands
| | - Herman P C E Kuipers
- Shell Technology Centre Amsterdam , P.O. Box 38000, 1030 BN Amsterdam, The Netherlands
| | - Mark Saeys
- Laboratory for Chemical Technology, Ghent University , Technologiepark 914, 9052 Gent, Belgium
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36
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An B, Cheng K, Wang C, Wang Y, Lin W. Pyrolysis of Metal–Organic Frameworks to Fe3O4@Fe5C2 Core–Shell Nanoparticles for Fischer–Tropsch Synthesis. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00464] [Citation(s) in RCA: 118] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Bing An
- Collaborative
Innovation Center of Chemistry for Energy Materials, State Key Laboratory
of Physical Chemistry of Solid Surfaces, Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
| | - Kang Cheng
- Collaborative
Innovation Center of Chemistry for Energy Materials, State Key Laboratory
of Physical Chemistry of Solid Surfaces, Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
| | - Cheng Wang
- Collaborative
Innovation Center of Chemistry for Energy Materials, State Key Laboratory
of Physical Chemistry of Solid Surfaces, Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
| | - Ye Wang
- Collaborative
Innovation Center of Chemistry for Energy Materials, State Key Laboratory
of Physical Chemistry of Solid Surfaces, Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
| | - Wenbin Lin
- Collaborative
Innovation Center of Chemistry for Energy Materials, State Key Laboratory
of Physical Chemistry of Solid Surfaces, Department of Chemistry,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
- Department
of Chemistry, University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, United States
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37
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Maintz S, Deringer VL, Tchougréeff AL, Dronskowski R. LOBSTER: A tool to extract chemical bonding from plane-wave based DFT. J Comput Chem 2016; 37:1030-5. [PMID: 26914535 PMCID: PMC5067632 DOI: 10.1002/jcc.24300] [Citation(s) in RCA: 788] [Impact Index Per Article: 98.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 12/21/2015] [Accepted: 12/23/2015] [Indexed: 12/18/2022]
Abstract
The computer program LOBSTER (Local Orbital Basis Suite Towards Electronic-Structure Reconstruction) enables chemical-bonding analysis based on periodic plane-wave (PAW) density-functional theory (DFT) output and is applicable to a wide range of first-principles simulations in solid-state and materials chemistry. LOBSTER incorporates analytic projection routines described previously in this very journal [J. Comput. Chem. 2013, 34, 2557] and offers improved functionality. It calculates, among others, atom-projected densities of states (pDOS), projected crystal orbital Hamilton population (pCOHP) curves, and the recently introduced bond-weighted distribution function (BWDF). The software is offered free-of-charge for non-commercial research. © 2016 The Authors. Journal of Computational Chemistry Published by Wiley Periodicals, Inc.
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Affiliation(s)
- Stefan Maintz
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056, Aachen, Germany
| | - Volker L Deringer
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056, Aachen, Germany
| | - Andrei L Tchougréeff
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056, Aachen, Germany
- Department of Chemistry, Moscow State University, Vorobyevy Gory 1, Moscow, 119992, Russia
- Moscow Center for Continuous Mathematical Education, Bol. Vlasyevskiy per. 11, Moscow, 119002, Russia
| | - Richard Dronskowski
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056, Aachen, Germany
- Jülich-Aachen Research Alliance, JARA-HPC, RWTH Aachen University, 52056, Aachen, Germany
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38
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McKee ML. A New Nitrogenase Mechanism Using a CFe8S9 Model: Does H2 Elimination Activate the Complex to N2 Addition to the Central Carbon Atom? J Phys Chem A 2016; 120:754-64. [PMID: 26821350 DOI: 10.1021/acs.jpca.5b10384] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A truncated model of the FeMo cofactor is used to explore a new mechanism for the conversion of N2 to NH3 by the nitrogenase enzyme. After four initial protonation/reduction steps, the H4CFe8S9 cluster has two hydrogen atoms attached to sulfur, one hydrogen bridging two iron centers and one hydrogen bonded to carbon. The loss of the CH and FeHFe hydrogens as molecular hydrogen activates the cluster to addition of N2 to the carbon center. This unique step takes place at a nearly planar four-coordinate carbon center and leads to an intermediate with a significantly weakened N-N bond. A hydrogen attached to a sulfur atom is then transferred to the distal nitrogen atom. Additional prontonation/reduction steps are modeled by adding a hydrogen atom to sulfur and locating the transition states for transfer to nitrogen. The first NH3 is lost in a thermal neutral step, while the second step is endothermic. The loss of H2 activates the complex by reducing the barrier for N2 addition by 3.5 kcal/mol. Since this is the most difficult step in the mechanism, reducing the barrier for this step justifies the "extra expense" of H2 production.
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Affiliation(s)
- Michael L McKee
- Department of Chemistry and Biochemistry, Auburn University , Auburn, Alabama 36849, United States
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39
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Zhao XF, Li H, Yuan CX, Li YQ, Wu YB, Wang ZX. Linear, planar, and tubular molecular structures constructed by double planar tetracoordinate carbon D2hC2(BeH)4 species via hydrogen-bridged -BeH2Be- bonds. J Comput Chem 2016. [PMID: 26202851 DOI: 10.1002/jcc.24018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
This computational study identifies the rhombic D2hC2 (BeH)4 (2a) to be a species featuring double planar tetracoordinate carbons (ptCs). Aromaticity and the peripheral BeBeBeBe bonding around CC core contribute to the stabilization of the ptC structure. Although the ptC structure is not a global minimum, its high kinetic stability and its distinct feature of having a bonded C2 core from having two separated carbon atoms in the global minimum and other low-lying minima could make the ptC structure to be preferred if the carbon source is dominated by C2 species. The electron deficiency of the BeH group allows the ptC species to serve as building blocks to construct large/nanostructures, such as linear chains, planar sheets, and tubes, via intermolecular hydrogen-bridged bonds (HBBs). Formation of one HBB bond releases more than 30.0 kcal/mol of energy, implying the highly exothermic formation processes and the possibility to synthesize these nano-size structures.
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Affiliation(s)
- Xue-Feng Zhao
- The Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, the Key Laboratory of Chemical Biology and Molecular Engineering of Education Ministry, Institute of Molecular Science, Shanxi University, Taiyuan, 030006, People's Republic of China
| | - Haixia Li
- College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Cai-Xia Yuan
- The Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, the Key Laboratory of Chemical Biology and Molecular Engineering of Education Ministry, Institute of Molecular Science, Shanxi University, Taiyuan, 030006, People's Republic of China
| | - Yan-Qin Li
- The Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, the Key Laboratory of Chemical Biology and Molecular Engineering of Education Ministry, Institute of Molecular Science, Shanxi University, Taiyuan, 030006, People's Republic of China
| | - Yan-Bo Wu
- The Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, the Key Laboratory of Chemical Biology and Molecular Engineering of Education Ministry, Institute of Molecular Science, Shanxi University, Taiyuan, 030006, People's Republic of China
| | - Zhi-Xiang Wang
- College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
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40
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Cats KH, Andrews JC, Stéphan O, March K, Karunakaran C, Meirer F, de Groot FMF, Weckhuysen BM. Active phase distribution changes within a catalyst particle during Fischer–Tropsch synthesis as revealed by multi-scale microscopy. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01524c] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new combination of three chemical imaging methods has been developed and applied to fresh and spent co-based Fischer–Tropsch catalysts.
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Affiliation(s)
- K. H. Cats
- Inorganic Chemistry and Catalysis
- Debye Institute for Nanomaterials Science
- Utrecht University
- 3584 CG Utrecht
- The Netherlands
| | - J. C. Andrews
- Stanford Synchrotron Light Source
- SLAC National Accelerator Laboratory
- Menlo Park
- USA
| | - O. Stéphan
- Laboratoire de Physique des Solides
- Université Paris Sud
- 91405 Orsay
- France
| | - K. March
- Laboratoire de Physique des Solides
- Université Paris Sud
- 91405 Orsay
- France
| | | | - F. Meirer
- Inorganic Chemistry and Catalysis
- Debye Institute for Nanomaterials Science
- Utrecht University
- 3584 CG Utrecht
- The Netherlands
| | - F. M. F. de Groot
- Inorganic Chemistry and Catalysis
- Debye Institute for Nanomaterials Science
- Utrecht University
- 3584 CG Utrecht
- The Netherlands
| | - B. M. Weckhuysen
- Inorganic Chemistry and Catalysis
- Debye Institute for Nanomaterials Science
- Utrecht University
- 3584 CG Utrecht
- The Netherlands
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41
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Trinh QT, Nguyen AV, Huynh DC, Pham TH, Mushrif SH. Mechanistic insights into the catalytic elimination of tar and the promotional effect of boron on it: first-principles study using toluene as a model compound. Catal Sci Technol 2016. [DOI: 10.1039/c6cy00358c] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The incorporation of a monolayer subsurface B into the Ni catalyst results in a corrugated Ni top surface and the activation of toluene is significantly promoted on B–Ni.
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Affiliation(s)
- Quang Thang Trinh
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- 637459 Singapore
| | - Anh Vu Nguyen
- School of Chemical Engineering
- Hanoi University of Science and Technology
- Hanoi
- Vietnam
| | - Dang Chinh Huynh
- School of Chemical Engineering
- Hanoi University of Science and Technology
- Hanoi
- Vietnam
| | - Thanh Huyen Pham
- School of Chemical Engineering
- Hanoi University of Science and Technology
- Hanoi
- Vietnam
| | - Samir H. Mushrif
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- 637459 Singapore
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42
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Dadras J, Jimenez-Izal E, Alexandrova AN. Alloying Pt Sub-nano-clusters with Boron: Sintering Preventative and Coke Antagonist? ACS Catal 2015. [DOI: 10.1021/acscatal.5b01513] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jonny Dadras
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Elisa Jimenez-Izal
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Anastassia N. Alexandrova
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
- California Nano-Systems Institute, Los Angeles, California 90095, United States
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43
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Yu X, Oganov AR, Popov IA, Boldyrev AI. d-AO spherical aromaticity in Ce6O8. J Comput Chem 2015; 37:103-9. [DOI: 10.1002/jcc.24049] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Revised: 07/22/2015] [Accepted: 07/23/2015] [Indexed: 01/10/2023]
Affiliation(s)
- Xiaohu Yu
- Department of Problems of Physics and Energetics; Moscow Institute of Physics and Technology; 9 Institutskiy Land Dolgoprudny City Moscow Region 141700 Russia
| | - Artem R. Oganov
- Department of Problems of Physics and Energetics; Moscow Institute of Physics and Technology; 9 Institutskiy Land Dolgoprudny City Moscow Region 141700 Russia
- Skolkovo Institute of Science and Technology; Skolkovo Innovation Center, 5 Nobel St. Moscow 143026 Russia
- Department of Geosciences and Center for Materials by Design; Stony Brook University; Stony Brook New York 11794
- International Center for Materials Discovery, School of Materials Science; Northwestern Polytechnical University; Xi'an 720072 China
| | - Ivan A. Popov
- Department of Chemistry and Biochemistry; Utah State University; Logan Utah 84322
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44
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Banerjee A, van Bavel AP, Kuipers HP, Saeys M. Origin of the Formation of Nanoislands on Cobalt Catalysts during Fischer–Tropsch Synthesis. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01169] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Arghya Banerjee
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117576
| | | | | | - Mark Saeys
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, 9052 Gent, Belgium
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45
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Guo JC, Wu HX, Ren GM, Miao CQ. D4h Ni4C(B4N4H8)2: Square sheet sandwich complex containing the planar tetracoordinate carbon. COMPUT THEOR CHEM 2015. [DOI: 10.1016/j.comptc.2015.04.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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