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Chen L, Lu J, Liu P, Gao L, Liu Y, Xiong F, Qiu S, Qiu X, Guo Y, Chen X. Dissociation and Charge Transfer of H 2O on Cu(110) Probed in Real Time Using Ion Scattering Spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:12047-12055. [PMID: 27788584 DOI: 10.1021/acs.langmuir.6b03516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Water-Cu(110) interaction is of particular importance during the routine use of graphene-based devices. In this work, water adsorption, dissociation, and desorption at elevated temperatures have been well studied using the time-of-flight ion scattering technique. It is found that water adsorption meets the first-order Langmuir adsorption model at room temperature. The variation of the ratio between residual O and H on the surface with temperature has been well determined, which profoundly reveals the dynamical process of surface composition. Furthermore, the change in the surface electronic properties has been probed by measuring negative-ion fractions as a function of the annealing temperature for fast ion scattering. It suggests that charge transfer is a very sensitive method for studying specific electronic processes in real time.
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Affiliation(s)
- Lin Chen
- School of Nuclear Science and Technology and ‡Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou 730000, China
| | - Jianjie Lu
- School of Nuclear Science and Technology and ‡Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou 730000, China
| | - Pinyang Liu
- School of Nuclear Science and Technology and ‡Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou 730000, China
| | - Lei Gao
- School of Nuclear Science and Technology and ‡Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou 730000, China
| | - Yuefeng Liu
- School of Nuclear Science and Technology and ‡Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou 730000, China
| | - Feifei Xiong
- School of Nuclear Science and Technology and ‡Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou 730000, China
| | - Shunli Qiu
- School of Nuclear Science and Technology and ‡Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou 730000, China
| | - Xiyu Qiu
- School of Nuclear Science and Technology and ‡Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou 730000, China
| | - Yanling Guo
- School of Nuclear Science and Technology and ‡Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou 730000, China
| | - Ximeng Chen
- School of Nuclear Science and Technology and ‡Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University , Lanzhou 730000, China
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Natarajan SK, Behler J. Neural network molecular dynamics simulations of solid–liquid interfaces: water at low-index copper surfaces. Phys Chem Chem Phys 2016; 18:28704-28725. [DOI: 10.1039/c6cp05711j] [Citation(s) in RCA: 114] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Molecular dynamics simulation of the water–copper interface have been carried out using high-dimensional neural network potential based on density functional theory.
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Affiliation(s)
| | - Jörg Behler
- Lehrstuhl für Theoretische Chemie
- Ruhr-Universität Bochum
- D-44780 Bochum
- Germany
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Seenivasan H, Tiwari AK. Water adsorption and dissociation on Ni(110): How is it different from its close packed counterparts? J Chem Phys 2014; 140:174704. [DOI: 10.1063/1.4873898] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Sälli E, Salmi T, Halonen L. Computational high-frequency overtone spectra of the water-ammonia complex. J Phys Chem A 2011; 115:11594-605. [PMID: 21882842 DOI: 10.1021/jp205529c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have computed vibrational high-frequency overtone spectra of the water-ammonia complex, H(2)O-NH(3), and its isotopomers. The complex has been modeled as two independently vibrating monomer units. The internal coordinate Hamiltonians for each monomer unit have been constructed using exact gas phase kinetic energy operators. The potential energy and dipole moment surfaces have been calculated with the explicitly correlated coupled cluster method CCSD(T)-F12A and the valence triple-ζ VTZ-F12 basis around the equilibrium geometry of the complex. The vibrational eigenvalues have been calculated variationally and the eigenfunctions obtained have been used to compute the intensities of the absorption transitions. In H(2)O-NH(3), the water molecule acts as the proton donor and its symmetry is broken. The hydrogen-bonded OH bond oscillator undergoes a large redshift and intensity enhancement compared to the free hydrogen bond. Broken degeneracy of the asymmetric vibrations, quenched inversion splittings, and blueshift of the symmetric bending mode are the most visible changes in the ammonia unit.
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Affiliation(s)
- Elina Sälli
- Department of Chemistry, University of Helsinki, Helsinki, Finland
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