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Mahdi HI, Ramlee NN, Santos DHDS, Giannakoudakis DA, de Oliveira LH, Selvasembian R, Azelee NIW, Bazargan A, Meili L. Formaldehyde production using methanol and heterogeneous solid catalysts: A comprehensive review. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.112944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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2
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Archambault P, Wei Y, Peslherbe GH. Density-functional theory studies of vanadium oxide clusters and their cations. Theor Chem Acc 2021. [DOI: 10.1007/s00214-021-02804-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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3
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Wang Y, Han C, Hong J, Fei Z, Dong C, Liu H, Xiong X. A combined photoelectron-imaging spectroscopic and theoretical investigation on the electronic structure of the VO 2H anion. RSC Adv 2021; 11:18729-18736. [PMID: 35478630 PMCID: PMC9033465 DOI: 10.1039/d1ra03173b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 05/11/2021] [Indexed: 11/21/2022] Open
Abstract
The electronic structure and vibrational spectrum of the VO2H anion are explored by combining photoelectron imaging spectroscopy and density functional theoretical (DFT) calculations. The electron affinity (EA) of VO2H is determined to be 1.304 ± 0.030 eV from the vibrationally resolved photoelectron spectrum acquired at 1.52 eV (814 nm). The anisotropy parameter (β) for the EA defined peak is measured to be 1.63 ± 0.10, indicating that it is the 17a' (4s orbital of the vanadium atom) electron attachment leading to the formation of the ground state of the VO2H anion. The vibrational fundamentals ν 1, ν 3, ν 4 and ν 5 are obtained for the neutral ground state. Experimental assignments are confirmed by energies from electronic structure calculations and Franck-Condon (FC) spectral simulations. These simulations support assigning the anion ground state as the results obtained from the B3LYP method. In addition, the molecular orbitals and bonding involved in the anionic VO2H cluster are also examined based on the present theoretical calculations.
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Affiliation(s)
- Yongtian Wang
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences Shanghai 201800 P. R. China
| | - Changcai Han
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences Shanghai 201800 P. R. China .,University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Jing Hong
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences Shanghai 201800 P. R. China .,University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Zejie Fei
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences Shanghai 201800 P. R. China
| | - Changwu Dong
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences Shanghai 201800 P. R. China
| | - Hongtao Liu
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences Shanghai 201800 P. R. China
| | - Xiaogen Xiong
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University Zhuhai 519082 P. R. China
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Yan P, Zhang X, Herold F, Li F, Dai X, Cao T, Etzold BJM, Qi W. Methanol oxidative dehydrogenation and dehydration on carbon nanotubes: active sites and basic reaction kinetics. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00619j] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In situ active site titration, carbonyl group containing model catalysts, and kinetic analysis have been applied to reveal the nature of oxidized carbon nanotubes catalyzed methanol dehydration and oxidative dehydrogenation reactions.
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Affiliation(s)
- Pengqiang Yan
- Shenyang National Laboratory for Materials Science
- Institute of Metal Research
- Chinese Academy of Sciences
- Shenyang
- P. R. China
| | - Xuefei Zhang
- Shenyang National Laboratory for Materials Science
- Institute of Metal Research
- Chinese Academy of Sciences
- Shenyang
- P. R. China
| | - Felix Herold
- Ernst-Berl-Institut für Technische und Makromolekulare Chemie
- Technische Universität Darmstadt
- Darmstadt
- Germany
| | - Fan Li
- Shenyang National Laboratory for Materials Science
- Institute of Metal Research
- Chinese Academy of Sciences
- Shenyang
- P. R. China
| | - Xueya Dai
- Shenyang National Laboratory for Materials Science
- Institute of Metal Research
- Chinese Academy of Sciences
- Shenyang
- P. R. China
| | - Tianlong Cao
- Shenyang National Laboratory for Materials Science
- Institute of Metal Research
- Chinese Academy of Sciences
- Shenyang
- P. R. China
| | - Bastian J. M. Etzold
- Ernst-Berl-Institut für Technische und Makromolekulare Chemie
- Technische Universität Darmstadt
- Darmstadt
- Germany
| | - Wei Qi
- Shenyang National Laboratory for Materials Science
- Institute of Metal Research
- Chinese Academy of Sciences
- Shenyang
- P. R. China
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Bosco MV, Bañares MA, Martínez-Huerta MV, Bonivardi AL, Collins SE. In situ FTIR and Raman study on the distribution and reactivity of surface vanadia species in V 2 O 5 /CeO 2 catalysts. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.07.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Fievez T, De Proft F, Geerlings P, Weckhuysen BM, Havenith RW. Conceptual chemistry approach towards the support effect in supported vanadium oxides: Valence bond calculations on the ionicity of vanadium catalysts. Catal Today 2011. [DOI: 10.1016/j.cattod.2011.06.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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8
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Schwarz H. Chemistry with methane: concepts rather than recipes. Angew Chem Int Ed Engl 2011; 50:10096-115. [PMID: 21656876 DOI: 10.1002/anie.201006424] [Citation(s) in RCA: 491] [Impact Index Per Article: 37.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Indexed: 11/11/2022]
Abstract
Four seemingly simple transformations related to the chemistry of methane will be addressed from mechanistic and conceptual points of view: 1) metal-mediated dehydrogenation to form metal carbene complexes, 2) the hydrogen-atom abstraction step in the oxidative dimerization of methane, 3) the mechanisms of the CH(4)→CH(3)OH conversion, and 4) the initial bond scission (C-H vs. O-H) as well as the rate-limiting step in the selective CH(3)OH→CH(2)O oxidation. State-of-the-art gas-phase experiments, in conjunction with electronic-structure calculations, permit identification of the elementary reactions at a molecular level and thus allow us to unravel detailed mechanistic aspects. Where appropriate, these results are compared with findings from related studies in solution or on surfaces.
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Affiliation(s)
- Helmut Schwarz
- Institut für Chemie der Technischen Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany.
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9
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Xie Y, Dong F, Heinbuch S, Rocca JJ, Bernstein ER. Investigation of the reactions of small neutral iron oxide clusters with methanol. J Chem Phys 2009; 130:114306. [DOI: 10.1063/1.3086724] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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10
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Dong F, Heinbuch S, Xie Y, Rocca JJ, Bernstein ER. Reactions of Neutral Vanadium Oxide Clusters with Methanol. J Phys Chem A 2009; 113:3029-40. [DOI: 10.1021/jp807589q] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Feng Dong
- Department of Chemistry, Department of Electrical and Computer Engineering, and NSF ERC for Extreme Ultraviolet Science and Technology, Colorado State University, Fort Collins, Colorado 80523
| | - Scott Heinbuch
- Department of Chemistry, Department of Electrical and Computer Engineering, and NSF ERC for Extreme Ultraviolet Science and Technology, Colorado State University, Fort Collins, Colorado 80523
| | - Yan Xie
- Department of Chemistry, Department of Electrical and Computer Engineering, and NSF ERC for Extreme Ultraviolet Science and Technology, Colorado State University, Fort Collins, Colorado 80523
| | - Jorge J. Rocca
- Department of Chemistry, Department of Electrical and Computer Engineering, and NSF ERC for Extreme Ultraviolet Science and Technology, Colorado State University, Fort Collins, Colorado 80523
| | - Elliot R. Bernstein
- Department of Chemistry, Department of Electrical and Computer Engineering, and NSF ERC for Extreme Ultraviolet Science and Technology, Colorado State University, Fort Collins, Colorado 80523
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Feyel S, Scharfenberg L, Daniel C, Hartl H, Schröder D, Schwarz H. Dehydrogenation of Methanol by Vanadium Oxide and Hydroxide Cluster Cations in the Gas Phase. J Phys Chem A 2007; 111:3278-86. [PMID: 17411019 DOI: 10.1021/jp067454o] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Bare vanadium oxide and hydroxide cluster cations, V(m)O(n)+ and V(m)O(n-1) (OH)+ (m = 1-4, n = 1-10), generated by electrospray ionization, were investigated with respect to their reactivity toward methanol using mass spectrometric techniques. Several reaction channels were observed, such as abstraction of a hydrogen atom, a methyl radical, or a hydroxymethyl radical, elimination of methane, and adduct formation. Moreover, dehydrogenation of methanol to generate formaldehyde was found to occur via four different pathways. Formaldehyde was released as a free molecule either upon transfer of two hydrogen atoms to the cluster or upon transfer of an oxygen atom from the cluster to the neutral alcohol concomitant with elimination of water. Further, formaldehyde was attached to V(m)O(n)+ upon loss of H2 or neutral water to produce the cation V(m)O(n)(OCH(2))+ or V(m)O(n-1) (OCH(2))+, respectively. A reactivity screening revealed that only high-valent vanadium oxide clusters are reactive with respect to H2 uptake, oxygen transfer, and elimination of H2O, whereas smaller and low-valent cluster cations are capable of dehydrogenating methanol via elimination of H2. For comparison, the reactivity of methanol with the corresponding hydroxide cluster ions, V(m)O(n-1) (OH)+, was studied also, for which dominant pathways lead to both condensation and association products, i.e., generation of the ions V(m)O(n-1) (OCH(3))+ and V(m)O(n-1) (OH)(CH(3)OH)+, respectively.
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Affiliation(s)
- Sandra Feyel
- Institut für Chemie der Technischen Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
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Keller DE, Airaksinen SMK, Krause AO, Weckhuysen BM, Koningsberger DC. Atomic XAFS as a tool to probe the reactivity of metal oxide catalysts: quantifying metal oxide support effects. J Am Chem Soc 2007; 129:3189-97. [PMID: 17323947 DOI: 10.1021/ja0667007] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The potential of atomic XAFS (AXAFS) to directly probe the catalytic performances of a set of supported metal oxide catalysts has been explored for the first time. For this purpose, a series of 1 wt % supported vanadium oxide catalysts have been prepared differing in their oxidic support material (SiO2, Al2O3, Nb2O5, and ZrO2). Previous characterization results have shown that these catalysts contain the same molecular structure on all supports, i.e., a monomeric VO4 species. It was found that the catalytic activity for the selective oxidation of methanol to formaldehyde and the oxidative dehydrogenation of propane to propene increases in the order SiO2 < Al2O3 < Nb2O5 < ZrO2. The opposite trend was observed for the dehydrogenation of propane to propene in the absence of oxygen. Interestingly, the intensity of the Fourier transform AXAFS peak decreases in the same order. This can be interpreted by an increase in the binding energy of the vanadium valence orbitals when the ionicity of the support (increasing electron charge on the support oxygen atoms) increases. Moreover, detailed EXAFS analysis shows a systematic decrease of the V-Ob(-M(support)) and an increase of a the V-O(H) bond length, when going from SiO2 to ZrO2. This implies a more reactive OH group for ZrO2, in line with the catalytic data. These results show that the electronic structure and consequently the catalytic behavior of the VO4 cluster depend on the ionicity of the support oxide. These results demonstrate that AXAFS spectroscopy can be used to understand and predict the catalytic performances of supported metal oxide catalysts. Furthermore, it enables the user to gather quantitative insight in metal oxide support interactions.
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Affiliation(s)
- Daphne E Keller
- Inorganic Chemistry and Catalysis, Department of Chemistry, Utrecht University, P.O. Box 80083, 3508 TB Utrecht, The Netherlands
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Redfern PC, Zapol P, Sternberg M, Adiga SP, Zygmunt SA, Curtiss LA. Quantum Chemical Study of Mechanisms for Oxidative Dehydrogenation of Propane on Vanadium Oxide. J Phys Chem B 2006; 110:8363-71. [PMID: 16623521 DOI: 10.1021/jp056228w] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have carried out a hybrid density functional study of mechanisms for oxidative dehydrogenation of propane on the (010) surface of V2O5. The surface was modeled using both vanadium oxide clusters and a periodic slab. We have investigated a Mars-van Krevelen mechanism that involves stepwise adsorption of the propane at an oxygen site followed by desorption of a water molecule and propene, and subsequent adsorption of an oxygen molecule to complete the catalytic cycle. The potential energy surface is found to have large barriers, which are lowered somewhat when the possibility of a triplet state is considered. The barriers for propane adsorption and propene elimination are 45-60 kcal/mol. The highest energy on the potential energy surface at the B3LYP/6-31G* level of theory is about 80 kcal/mol above the energy of the reactants and corresponds to formation of an oxygen vacancy after water elimination. Subsequent addition of an oxygen molecule to fill the vacancy is predicted to be energetically downhill. The reactions of propane at a bridging oxygen site and at a vanadyl site have similar energetics. The key results of the cluster calculations are confirmed by periodic calculations. Factors that may lower the barriers on the potential energy surface, including the interaction of vanadium oxide clusters with a support material and a concerted reaction with O2, are discussed.
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Affiliation(s)
- P C Redfern
- Materials Science and Chemistry Divisions, Argonne National Laboratory, Argonne, Illinois 60439, USA
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Kim KM, Lee D, Seo MS, Park H, Song R, Jun MJ, Nam W. Tuning the intermolecular dative interactions by altering the ligand planarity and counter cations in vanadyl(iv) complexes. Dalton Trans 2005:1567-9. [PMID: 15852103 DOI: 10.1039/b501350j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A vanadyl(iv) complex, K2V(O)(dtoym)2, forms polymeric interactions via intermolecular dative bonds; the intermolecular dative interaction is tuned by changes of the ligand planarity and counter cations of the vanadyl complex.
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Affiliation(s)
- Kwan Mook Kim
- Department of Chemistry, Division of Nano Sciences, and Center for Biomimetic Systems, Ewha Womans University, Seoul 120-750, Korea.
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