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Kayanuma M, Shoji M, Furuya K, Kamiya K, Aikawa Y, Umemura M, Shigeta Y. First-Principles Study of the Reaction Mechanism of CHO + H on Graphene Surface. J Phys Chem A 2019; 123:5633-5639. [PMID: 31244121 DOI: 10.1021/acs.jpca.9b02345] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Many organic molecules observed in the interstellar medium are considered to be formed on dust grains and populated into the gas phase. We analyzed the reaction of HCO + H on a graphene surface using ab initio molecular dynamics simulations as a case study of the formation and desorption of organic molecules on interstellar dust particles. During the reactions of chemisorbed CHO (chemisorbed at the C atom) with free H, CO was generated and efficiently desorbed from the surface. These results suggest that the reactions, of which the reactant forms a covalent bond with the surface while the product does not, cause efficient desorption of the product upon reaction. In such reactions a repulsive force between the product and the surface would be generated and accelerate translation of the product in a specific direction. In addition, it was also shown that the branching ratio of the reactions between radical species on the surface would be affected by the form of the adsorption on the surface, e.g., when a free H reacted with the CHO chemisorbed at the C atom, CH2O was not generated.
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Affiliation(s)
- Megumi Kayanuma
- Research Center for Computational Design of Advanced Functional Materials , National Institute of Advanced Industrial Science and Technology , Central 2, 1-1-1 Umezono , Tsukuba , Ibaraki 305-8568 , Japan.,Center for Computational Sciences , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8577 , Japan
| | - Mitsuo Shoji
- Center for Computational Sciences , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8577 , Japan
| | - Kenji Furuya
- Center for Computational Sciences , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8577 , Japan
| | - Katsumasa Kamiya
- Center for Basic Education and Integrated Learning , Kanagawa Institute of Technology , 1030 Shimoogino , Atsugi , Kanagawa 243-0292 , Japan
| | - Yuri Aikawa
- Department of Astronomy , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-0033 , Japan
| | - Masayuki Umemura
- Center for Computational Sciences , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8577 , Japan
| | - Yasuteru Shigeta
- Center for Computational Sciences , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8577 , Japan.,Institute of Space and Astronautical Science , Japan Aerospace Exploration Agency , 3-1-1 Yoshinodai, Chuo-ku , Sagamihara , Kanagawa 252-0222 , Japan
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Bonfanti M, Achilli S, Martinazzo R. Sticking of atomic hydrogen on graphene. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:283002. [PMID: 29845971 DOI: 10.1088/1361-648x/aac89f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Recent years have witnessed an ever growing interest in the interactions between hydrogen atoms and a graphene sheet. Largely motivated by the possibility of modulating the electric, optical and magnetic properties of graphene, a huge number of studies have appeared recently that added to and enlarged earlier investigations on graphite and other carbon materials. In this review we give a glimpse of the many facets of this adsorption process, as they emerged from these studies. The focus is on those issues that have been addressed in detail, under carefully controlled conditions, with an emphasis on the interplay between the adatom structures, their formation dynamics and the electric, magnetic and chemical properties of the carbon sheet.
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Affiliation(s)
- Matteo Bonfanti
- Institute of Physical and Theoretical Chemistry, Goethe University Frankfurt, Max-von-Laue-Str. 7, 60438 Frankfurt, Germany
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Pasquini M, Bonfanti M, Martinazzo R. Quantum dynamical investigation of the isotope effect in H2 formation on graphite at cold collision energies. Phys Chem Chem Phys 2016; 18:6607-17. [PMID: 26868899 DOI: 10.1039/c5cp07272g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Eley-Rideal abstraction of hydrogen atoms on graphitic surfaces at cold collision energies was investigated using a time-dependent wave packet method within the rigid-flat surface approximation, with a focus on hydrogen-deuterium isotopic substitutions. It is found that the marked isotope effect of collinear collisions disappears when the full dimensionality of the problem is taken into account, thereby suggesting that abstraction is less direct than commonly believed and proceeds through glancing rather than head-on collisions. In contrast, a clear isotope effect is observed for "hot-atom" formation, which appears to be strongly favored for heavy projectiles because of their higher density of physisorbed states. Overall, the dynamics is essentially classical and reasonably well described by quasi-classical trajectory methods at all but the lowest energies (≲10 meV). A comparison of the results obtained in the (substrate) adiabatic and diabatic limits suggests that the reaction is only marginally affected by the lattice dynamics, but highlights the importance of including energy dissipation processes in order to accurately describe the internal excitation of the product molecules.
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Affiliation(s)
- Marta Pasquini
- Universitá degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy.
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Brenig W, Roman T. Graphene and graphite, low-temperature catalysts producing weakly-excited hydrogen molecules. Chem Phys 2014. [DOI: 10.1016/j.chemphys.2014.05.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Insights into H2 formation in space from ab initio molecular dynamics. Proc Natl Acad Sci U S A 2013; 110:6674-7. [PMID: 23572584 DOI: 10.1073/pnas.1301433110] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Hydrogen formation is a key process for the physics and the chemistry of interstellar clouds. Molecular hydrogen is believed to form on the carbonaceous surface of dust grains, and several mechanisms have been invoked to explain its abundance in different regions of space, from cold interstellar clouds to warm photon-dominated regions. Here, we investigate direct (Eley-Rideal) recombination including lattice dynamics, surface corrugation, and competing H-dimers formation by means of ab initio molecular dynamics. We find that Eley-Rideal reaction dominates at energies relevant for the interstellar medium and alone may explain observations if the possibility of facile sticking at special sites (edges, point defects, etc.) on the surface of the dust grains is taken into account.
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Bonfanti M, Casolo S, Tantardini GF, Martinazzo R. Surface models and reaction barrier in Eley–Rideal formation of H2 on graphitic surfaces. Phys Chem Chem Phys 2011; 13:16680-8. [DOI: 10.1039/c1cp21900f] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Psofogiannakis GM, Froudakis GE. Fundamental studies and perceptions on the spillover mechanism for hydrogen storage. Chem Commun (Camb) 2011; 47:7933-43. [DOI: 10.1039/c1cc11389e] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Casolo S, Martinazzo R, Bonfanti M, Tantardini GF. Quantum Dynamics of the Eley−Rideal Hydrogen Formation Reaction on Graphite at Typical Interstellar Cloud Conditions. J Phys Chem A 2009; 113:14545-53. [DOI: 10.1021/jp9040265] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Simone Casolo
- Dipartimento di Chimica Fisica ed Elettrochimica, Università degli Studi di Milano, V. Golgi 19, 20133 Milan, Italy; CIMAINA, Interdisciplinary Center of Nanostructured Materials and Interfaces, University of Milan; and CNR Institute of Molecular Sciences and Technology, V. Golgi 19, 20133 Milan, Italy
| | - Rocco Martinazzo
- Dipartimento di Chimica Fisica ed Elettrochimica, Università degli Studi di Milano, V. Golgi 19, 20133 Milan, Italy; CIMAINA, Interdisciplinary Center of Nanostructured Materials and Interfaces, University of Milan; and CNR Institute of Molecular Sciences and Technology, V. Golgi 19, 20133 Milan, Italy
| | - Matteo Bonfanti
- Dipartimento di Chimica Fisica ed Elettrochimica, Università degli Studi di Milano, V. Golgi 19, 20133 Milan, Italy; CIMAINA, Interdisciplinary Center of Nanostructured Materials and Interfaces, University of Milan; and CNR Institute of Molecular Sciences and Technology, V. Golgi 19, 20133 Milan, Italy
| | - Gian Franco Tantardini
- Dipartimento di Chimica Fisica ed Elettrochimica, Università degli Studi di Milano, V. Golgi 19, 20133 Milan, Italy; CIMAINA, Interdisciplinary Center of Nanostructured Materials and Interfaces, University of Milan; and CNR Institute of Molecular Sciences and Technology, V. Golgi 19, 20133 Milan, Italy
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