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Mistry K, Snowden H, Darling GR, Hodgson A. Hydroxyl on Stepped Copper and its Interaction with Water. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2024; 128:13025-13033. [PMID: 39140096 PMCID: PMC11317974 DOI: 10.1021/acs.jpcc.4c04091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2024] [Revised: 07/19/2024] [Accepted: 07/23/2024] [Indexed: 08/15/2024]
Abstract
We describe the hydroxyl and mixed hydroxyl-water structures formed on a stepped copper surface following the reaction of adsorbed O with water at a low temperature and compare them to the structures found previously on plane copper surfaces. Thermal desorption profiles, STM, and low-energy electron diffraction show that water reacts with O at temperatures below 130 K on Cu(511). Two well-defined phases appear as the OH/H2O layer is heated to desorb excess water, a 1OH:1H2O phase and a pure OH phase. The 1OH:1H2O structure consists of 1D chains binding across two adjacent copper steps, with a double period along the step. Electronic structure calculations show that the structure has a zigzag chain of water along the terrace, stabilized by hydrogen bonds to OH groups adsorbed in the step bridge sites. This structure binds OH in its favored site and is similar to the structure observed on other open faces of Cu and Ni, suggesting that this structural arrangement may be common on other surfaces that have steps or rows of close packed metal atoms. The hydroxyl/water chains decompose at 210 K to leave OH adsorbed in the Cu step bridge site, with some forming H-bonded trimers that bridge between two Cu steps. Heating the surface causes hydroxyl to disproportionate near 300 K, desorbing water to leave chemisorbed O.
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Affiliation(s)
- Kallum Mistry
- Surface Science Research Centre and
Department of Chemistry, University of Liverpool, Liverpool L69 3BX, U.K.
| | - Henry Snowden
- Surface Science Research Centre and
Department of Chemistry, University of Liverpool, Liverpool L69 3BX, U.K.
| | - George R. Darling
- Surface Science Research Centre and
Department of Chemistry, University of Liverpool, Liverpool L69 3BX, U.K.
| | - Andrew Hodgson
- Surface Science Research Centre and
Department of Chemistry, University of Liverpool, Liverpool L69 3BX, U.K.
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2
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Huang Y, Yu F, Yang X, Wang L, Lü W. Design and Realization of Visual and Contact-Type Fast Charging Power Source. Chemistry 2024:e202402020. [PMID: 38981857 DOI: 10.1002/chem.202402020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Revised: 06/29/2024] [Accepted: 07/08/2024] [Indexed: 07/11/2024]
Abstract
Charging power supplies with both fast and visualization functions have a wide range of applications in the information and new energy industries. In this paper, the visualized and contact-type fast charging power supply based on WO3 film and Zn sheet is presented, and the prototype devices are fabricated. Different with the charging method of conventional batteries, charging is achieved by a Zn sheet contacting with a WO3 film moistened with water, resulting in a rapid discoloration of WO3. Theoretical investigation indicates that the interaction between Zn sheet and water molecules is the primary cause of the color change in the WO3 film. The WO3 film completes the colouring state within 10 s in the presence of Zn sheet and water, and the open-circuit voltage of the device is 0.7 V, which can be used to drive various electronics by series-parallel connection. This research introduces a novel method to induce colouring of WO3 films and proposes a fast charging mode different from traditional power sources. It provides valuable insights for the future development of fast charging in the field of electrical energy.
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Affiliation(s)
- Yuxin Huang
- Key Laboratory of Advanced Structural Materials, Ministry of Education & Advanced Institute of Materials Science, Changchun University of Technology, Changchun, 130012, People's Republic of China
| | - Fei Yu
- Key Laboratory of Advanced Structural Materials, Ministry of Education & Advanced Institute of Materials Science, Changchun University of Technology, Changchun, 130012, People's Republic of China
| | - Xijia Yang
- Key Laboratory of Advanced Structural Materials, Ministry of Education & Advanced Institute of Materials Science, Changchun University of Technology, Changchun, 130012, People's Republic of China
| | - Liying Wang
- Key Laboratory of Advanced Structural Materials, Ministry of Education & Advanced Institute of Materials Science, Changchun University of Technology, Changchun, 130012, People's Republic of China
| | - Wei Lü
- Key Laboratory of Advanced Structural Materials, Ministry of Education & Advanced Institute of Materials Science, Changchun University of Technology, Changchun, 130012, People's Republic of China
- State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, People's Republic of China
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3
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Ge G, Zhang JR, Wang SY, Wei M, Ji Y, Duan S, Ueda K, Hua W. Mapping Hydrogen Positions along the Proton Transfer Pathway in an Organic Crystal by Computational X-ray Spectra. J Phys Chem Lett 2024; 15:6051-6061. [PMID: 38819966 DOI: 10.1021/acs.jpclett.4c01133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2024]
Abstract
Understanding proton transfer (PT) dynamics in condensed phases is crucial in chemistry. We computed a 2D map of N 1s X-ray photoelectron/absorption spectroscopy (XPS/XAS) for an organic donor-acceptor salt crystal against two varying N-H distances to track proton motions. Our results provide a continuous spectroscopic mapping of O-H···N↔O-··· H+-N processes via hydrogen bonds at both nitrogens, demonstrating the sensitivity of N 1s transient XPS/XAS to hydrogen positions and PT. By reducing the O-H length at N1 by only 0.2 Å, we achieved excellent theory-experiment agreement in both XPS and XAS. Our study highlights the challenge in refining proton positions in experimental crystal structures by periodic geometry optimizations and proposes an alternative scaled snapshot protocol as a more effective approach. This work provides valuable insights into X-ray spectra for correlated PT dynamics in complex crystals, benefiting future experimental studies.
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Affiliation(s)
- Guoyan Ge
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, School of Physics, Nanjing University of Science and Technology, 210094 Nanjing, China
| | - Jun-Rong Zhang
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, School of Physics, Nanjing University of Science and Technology, 210094 Nanjing, China
| | - Sheng-Yu Wang
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, School of Physics, Nanjing University of Science and Technology, 210094 Nanjing, China
| | - Minrui Wei
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, School of Physics, Nanjing University of Science and Technology, 210094 Nanjing, China
| | - Yongfei Ji
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong 510006, China
| | - Sai Duan
- Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, MOE Key Laboratory of Computational Physical Sciences, Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Kiyoshi Ueda
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
- Department of Chemistry, Tohoku University, Sendai 980-8578, Japan
| | - Weijie Hua
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, School of Physics, Nanjing University of Science and Technology, 210094 Nanjing, China
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4
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Mistry K, Gerrard N, Hodgson A. Wetting of a Stepped Platinum (211) Surface. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2023; 127:4741-4748. [PMID: 36925560 PMCID: PMC10009809 DOI: 10.1021/acs.jpcc.2c08360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 02/12/2023] [Indexed: 06/18/2023]
Abstract
Steps stabilize water adsorption on metal surfaces, providing favorable binding sites for water during wetting or ice nucleation, but there is limited understanding of the local water arrangements formed on such surfaces. Here we describe the structural evolution of water on the stepped Pt(211) surface using thermal desorption, low-energy electron diffraction, and scanning tunneling microscopy to probe the water structure. At low coverage water forms linear structures comprising zigzag chains along the steps that are decorated by H-bonded rings every one or two units along the terrace. Simple 2-coordinate H-bonded chains are not observed, indicating the Pt step binds too weakly to compensate entirely for a low water H-bond coordination number. As the coverage increases, water chains assemble into a disordered (2 × 1) structure, likely made up of the same narrow water chains along the steps with little or no H-bonding between adjacent structures. The chain structure disappears as water adsorption saturates the surface to form an incommensurate, disordered network of water rings of different size. Although the steps on Pt(211) clearly stabilize water adsorption and direct growth, the surface does not support the simple 1D chains previously proposed or an ordered 2D network such as seen on other surfaces. We discuss reasons for this and the factors that determine the behavior of the first water layer on stepped metal surfaces.
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5
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Zheng T, Li X, Gu J, Liu S, Zhang Y, Zhang H. Penetration of lubricating water molecules at the frictional interface of UHMWPE: Insights from molecular dynamics simulations. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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6
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Abstract
Structures and processes at water/metal interfaces play an important technological role in electrochemical energy conversion and storage, photoconversion, sensors, and corrosion, just to name a few. However, they are also of fundamental significance as a model system for the study of solid-liquid interfaces, which requires combining concepts from the chemistry and physics of crystalline materials and liquids. Particularly interesting is the fact that the water-water and water-metal interactions are of similar strength so that the structures at water/metal interfaces result from a competition between these comparable interactions. Because water is a polar molecule and water and metal surfaces are both polarizable, explicit consideration of the electronic degrees of freedom at water/metal interfaces is mandatory. In principle, ab initio molecular dynamics simulations are thus the method of choice to model water/metal interfaces, but they are computationally still rather demanding. Here, ab initio simulations of water/metal interfaces will be reviewed, starting from static systems such as the adsorption of single water molecules, water clusters, and icelike layers, followed by the properties of liquid water layers at metal surfaces. Technical issues such as the appropriate first-principles description of the water-water and water-metal interactions will be discussed, and electrochemical aspects will be addressed. Finally, more approximate but numerically less demanding approaches to treat water at metal surfaces from first-principles will be briefly discussed.
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Affiliation(s)
- Axel Groß
- Institute of Theoretical Chemistry, Ulm University, 89069 Ulm, Germany.,Electrochemical Energy Storage, Helmholtz Institute Ulm (HIU), 89069 Ulm, Germany
| | - Sung Sakong
- Institute of Theoretical Chemistry, Ulm University, 89069 Ulm, Germany
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7
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Rodrigues GLS, Diesen E, Voss J, Norman P, Pettersson LGM. Simulations of x-ray absorption spectra for CO desorbing from Ru(0001) with transition-potential and time-dependent density functional theory approaches. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2022; 9:014101. [PMID: 35071691 PMCID: PMC8759799 DOI: 10.1063/4.0000135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 12/16/2021] [Indexed: 06/14/2023]
Abstract
The desorption of a carbon monoxide molecule from a Ru(0001) surface was studied by means of X-ray Absorption Spectra (XAS) computed with Transition Potential (TP-DFT) and Time Dependent (TD-DFT) DFT methods. By unraveling the evolution of the CO electronic structure upon desorption, we observed that at 2.3 Å from the surface, the CO molecule has already predominantly gas-phase character. While C 1s XAS is quite insensitive to changes in the C-O bond length, the O 1s excitation is very sensitive with the π* coming down in energy upon CO bond stretching, which competes with the increase in orbital energy due to the repulsive interaction with the metallic surface. We show in a systematic way that the TP-DFT method can describe the XAS rather well at the endpoints (chemisorbed and gas phase) but is affected by artificial charge transfer and/or incorrect spin treatment in the transition region in cases like CO, where there are low-lying π* orbitals and large exchange interactions between the core 1s and valence-acceptor π* orbitals. As an alternative, we demonstrate by comparing with experimental data that a linear response approach using TD-DFT employing common exchange-correlation functionals and finite-size clusters can yield a good description of the spectral evolution of the 1s → π* transition with correct spin and gas-to-chemisorbed chemical shifts in good agreement with experiment.
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Affiliation(s)
- Gabriel L. S. Rodrigues
- Department of Physics, AlbaNova University Center, Stockholm University, SE-10691 Stockholm, Sweden
| | - Elias Diesen
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Johannes Voss
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Patrick Norman
- Department of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden
| | - Lars G. M. Pettersson
- Department of Physics, AlbaNova University Center, Stockholm University, SE-10691 Stockholm, Sweden
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8
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Uncovering the electrochemical interface of low-index copper surfaces in deep groundwater environments. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.137111] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Gerrard N, Mistry K, Darling GR, Hodgson A. Water Dissociation and Hydroxyl Formation on Ni(110). THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2020; 124:23815-23822. [PMID: 33154786 PMCID: PMC7604940 DOI: 10.1021/acs.jpcc.0c08708] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/03/2020] [Indexed: 06/11/2023]
Abstract
Nickel is an active catalyst for hydrogenation and re-forming reactions, with the reactions showing a strong dependence on the surface exposed. Here, we describe the mixed hydroxyl-water phases formed during water dissociation on Ni(110) using scanning tunneling microscopy and low-current low-energy electron diffraction. Water dissociation starts between 150 and 180 K as the H-bond structure evolves from linear one-dimensional (1D) chains of intact water into a two-dimensional (2D) network containing short rows of face-sharing hexagonal rings. As further water desorbs, the hexagonal rows adopt a local (2 × 3) arrangement, forming small, disordered domains separated by strain relief features. Decomposition of this phase occurs near 220 K to form linear 1D structures consisting of flat, zigzag water chains, with each water stabilized by donating one H to hydroxyl to form a branched chain structure. The OH-H2O chains repel each other, with the saturation layer ordering into a (2 0, 1 4) structure that decomposes to OH near 245 K as further water desorbs. The structure of the mixed OH/H2O phases is discussed and contrasted with those found on the related Cu(110) surface, with the differences attributed to strain in the 2D H-bond network caused by the short Ni lattice spacing and strong bond to OH/H2O.
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10
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Lin C, Darling GR, Forster M, McBride F, Massey A, Hodgson A. Hydration of a 2D Supramolecular Assembly: Bitartrate on Cu(110). J Am Chem Soc 2020; 142:13814-13822. [PMID: 32692550 PMCID: PMC7458425 DOI: 10.1021/jacs.0c04747] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
![]()
Hydration
layers play a key role in many technical and biological
systems, but our understanding of these structures remains very limited.
Here, we investigate the molecular processes driving hydration of
a chiral metal–organic surface, bitartrate on Cu(110), which
consists of hydrogen-bonded bitartrate rows separated by exposed Cu.
Initially water decorates the metal channels, hydrogen bonding to
the exposed O ligands that bind bitartrate to Cu, but does not wet
the bitartrate rows. At higher temperature, water inserts into the
structure, breaks the existing intermolecular hydrogen bonds, and
changes the adsorption site and footprint. Calculations show this
process is driven by the creation of stable adsorption sites between
the carboxylate ligands, to allow hydration of O–Cu ligands
within the interior of the structure. This work suggests that hydration
of polar metal–adsorbate ligands will be a dominant factor
in many systems during surface hydration or self-assembly from solution.
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Affiliation(s)
- Chenfang Lin
- Surface Science Research Centre and Department of Chemistry, University of Liverpool, Liverpool L69 3BX, United Kingdom
| | - George R Darling
- Surface Science Research Centre and Department of Chemistry, University of Liverpool, Liverpool L69 3BX, United Kingdom
| | - Matthew Forster
- Surface Science Research Centre and Department of Chemistry, University of Liverpool, Liverpool L69 3BX, United Kingdom
| | - Fiona McBride
- Surface Science Research Centre and Department of Chemistry, University of Liverpool, Liverpool L69 3BX, United Kingdom
| | - Alan Massey
- Surface Science Research Centre and Department of Chemistry, University of Liverpool, Liverpool L69 3BX, United Kingdom
| | - Andrew Hodgson
- Surface Science Research Centre and Department of Chemistry, University of Liverpool, Liverpool L69 3BX, United Kingdom
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11
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Understanding Cement Hydration of Cemented Paste Backfill: DFT Study of Water Adsorption on Tricalcium Silicate (111) Surface. MINERALS 2019. [DOI: 10.3390/min9040202] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Understanding cement hydration is of crucial importance for the application of cementitious materials, including cemented paste backfill. In this work, the adsorption of a single water molecule on an M3-C3S (111) surface is investigated using density functional theory (DFT) calculations. The adsorption energies for 14 starting geometries are calculated and the electronic properties of the reaction are analysed. Two adsorption mechanisms, molecular adsorption and dissociative adsorption, are observed and six adsorption configurations are found. The results indicate that spontaneous dissociative adsorption is energetically favored over molecular adsorption. Electrons are transferred from the surface to the water molecule during adsorption. The density of states (DOS) reveals the bonding mechanisms between water and the surface. This study provides an insight into the adsorption mechanism at an atomic level, and can significantly promote the understanding of cement hydration within such systems.
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12
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Kakekhani A, Roling LT, Kulkarni A, Latimer AA, Abroshan H, Schumann J, AlJama H, Siahrostami S, Ismail-Beigi S, Abild-Pedersen F, Nørskov JK. Nature of Lone-Pair–Surface Bonds and Their Scaling Relations. Inorg Chem 2018; 57:7222-7238. [DOI: 10.1021/acs.inorgchem.8b00902] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Arvin Kakekhani
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Luke T. Roling
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Ambarish Kulkarni
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Allegra A. Latimer
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Hadi Abroshan
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Julia Schumann
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Hassan AlJama
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Samira Siahrostami
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Sohrab Ismail-Beigi
- Department of Applied Physics, Yale University, New Haven, Connecticut 06520, United States
| | - Frank Abild-Pedersen
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Jens K. Nørskov
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
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13
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Hu J, He S, Zhang Y, Ma H, Zhang X, Chen Z. Theoretical Insights into the Solvent Polarity Effect on the Quality of Self-Assembled N-Octadecanethiol Monolayers on Cu (111) Surfaces. Molecules 2018; 23:molecules23040733. [PMID: 29565816 PMCID: PMC6017570 DOI: 10.3390/molecules23040733] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 03/14/2018] [Accepted: 03/21/2018] [Indexed: 11/16/2022] Open
Abstract
The effect of solvent polarity on the quality of self-assembled n-octadecanethiol (C18SH) on Cu surfaces was systematically analyzed using first-principles calculations. The results indicate that the adsorption energy for C18SH on a Cu surface is −3.37 eV, which is higher than the adsorption energies of the solvent molecules. The higher adsorption energy of dissociated C18SH makes the monolayer self-assembly easier on a Cu (111) surface through competitive adsorption. Furthermore, the adsorption energy per unit area for C18SH decreases from −3.24 eV·Å−2 to −3.37 eV·Å−2 in solvents with an increased dielectric constant of 1 to 78.54. Detailed energy analysis reveals that the electrostatic energy gradually increases, while the kinetic energy decreases with increasing dielectric constant. The increased electrostatic energies are mainly attributable to the disappearance of electrostatic interactions on the sulfur end of C18SH. The decreased kinetic energy is mainly due to the generated push force in the polar solvent, which limits the mobility of C18SH. A molecular dynamics simulation also confirms that the -CH3 site has a great interaction with CH3(CH2)4CH3 molecules and a weak interaction with CH3CH2OH molecules. The different types of interactions help to explain why the surface coverage of C18SH on Cu in a high-polarity ethanol solution is significantly larger than that in a low-polarity n-hexane solution at the stabilized stage.
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Affiliation(s)
- Jun Hu
- School of Chemical Engineering, Northwest University, Xi'an 710069, Shaanxi, China.
| | - Shijun He
- School of Chemical Engineering, Northwest University, Xi'an 710069, Shaanxi, China.
| | - Yaozhong Zhang
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, Shaanxi, China.
| | - Haixia Ma
- School of Chemical Engineering, Northwest University, Xi'an 710069, Shaanxi, China.
| | - Xiaoli Zhang
- School of Chemical Engineering, Northwest University, Xi'an 710069, Shaanxi, China.
| | - Zhong Chen
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
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14
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Affiliation(s)
- F. McBride
- Department of Chemistry, Surface Science Research Centre, University of Liverpool, Liverpool L69 3BX, UK
| | - A. Hodgson
- Department of Chemistry, Surface Science Research Centre, University of Liverpool, Liverpool L69 3BX, UK
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15
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Björneholm O, Hansen MH, Hodgson A, Liu LM, Limmer DT, Michaelides A, Pedevilla P, Rossmeisl J, Shen H, Tocci G, Tyrode E, Walz MM, Werner J, Bluhm H. Water at Interfaces. Chem Rev 2016; 116:7698-726. [PMID: 27232062 DOI: 10.1021/acs.chemrev.6b00045] [Citation(s) in RCA: 358] [Impact Index Per Article: 44.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The interfaces of neat water and aqueous solutions play a prominent role in many technological processes and in the environment. Examples of aqueous interfaces are ultrathin water films that cover most hydrophilic surfaces under ambient relative humidities, the liquid/solid interface which drives many electrochemical reactions, and the liquid/vapor interface, which governs the uptake and release of trace gases by the oceans and cloud droplets. In this article we review some of the recent experimental and theoretical advances in our knowledge of the properties of aqueous interfaces and discuss open questions and gaps in our understanding.
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Affiliation(s)
- Olle Björneholm
- Department of Physics and Astronomy, Uppsala University , Box 516, 751 20 Uppsala, Sweden
| | - Martin H Hansen
- Technical University of Denmark , 2800 Kongens Lyngby, Denmark.,Department of Chemistry, University of Copenhagen , Universitetsparken 5, 2100 Copenhagen, Denmark
| | - Andrew Hodgson
- Department of Chemistry, University of Liverpool , Liverpool L69 7ZD, United Kingdom
| | - Li-Min Liu
- Thomas Young Centre, London Centre for Nanotechnology, Department of Physics and Astronomy, and Department of Chemistry, University College London , London WC1E 6BT, United Kingdom.,Beijing Computational Science Research Center , Beijing, 100193, China
| | - David T Limmer
- Princeton Center for Theoretical Science, Princeton University , Princeton, New Jersey 08544, United States
| | - Angelos Michaelides
- Thomas Young Centre, London Centre for Nanotechnology, Department of Physics and Astronomy, and Department of Chemistry, University College London , London WC1E 6BT, United Kingdom
| | - Philipp Pedevilla
- Thomas Young Centre, London Centre for Nanotechnology, Department of Physics and Astronomy, and Department of Chemistry, University College London , London WC1E 6BT, United Kingdom
| | - Jan Rossmeisl
- Department of Chemistry, University of Copenhagen , Universitetsparken 5, 2100 Copenhagen, Denmark
| | - Huaze Shen
- International Center for Quantum Materials and School of Physics, Peking University , Beijing 100871, China
| | - Gabriele Tocci
- Thomas Young Centre, London Centre for Nanotechnology, Department of Physics and Astronomy, and Department of Chemistry, University College London , London WC1E 6BT, United Kingdom.,Laboratory for fundamental BioPhotonics, Laboratory of Computational Science and Modeling, Institutes of Bioengineering and Materials Science and Engineering, School of Engineering, and Lausanne Centre for Ultrafast Science, École Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne, Switzerland
| | - Eric Tyrode
- Department of Chemistry, KTH Royal Institute of Technology , 10044 Stockholm, Sweden
| | - Marie-Madeleine Walz
- Department of Physics and Astronomy, Uppsala University , Box 516, 751 20 Uppsala, Sweden
| | - Josephina Werner
- Department of Physics and Astronomy, Uppsala University , Box 516, 751 20 Uppsala, Sweden.,Department of Chemistry and Biotechnology, Swedish University of Agricultural Sciences , Box 7015, 750 07 Uppsala, Sweden
| | - Hendrik Bluhm
- Chemical Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
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16
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Ta TD, Tieu AK, Zhu H, Zhu Q, Kosasih PB, Zhang J, Deng G. Tribological Behavior of Aqueous Copolymer Lubricant in Mixed Lubrication Regime. ACS APPLIED MATERIALS & INTERFACES 2016; 8:5641-5652. [PMID: 26828119 DOI: 10.1021/acsami.5b10905] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Although a number of experiments have been attempted to investigate the lubrication of aqueous copolymer lubricant, which is applied widely in metalworking operations, a comprehensive theoretical investigation at atomistic level is still lacking. This study addresses the influence of loading pressure and copolymer concentration on the structural properties and tribological performance of aqueous copolymer solution of poly(propylene oxide)-poly(ethylene oxide)-poly(propylene oxide) (PPO-PEO-PPO) at mixed lubrication using a molecular dynamic (MD) simulation. An effective interfacial potential, which has been derived from density functional theory (DFT) calculations, was employed for the interactions between the fluid's molecules and iron surface. The simulation results have indicated that the triblock copolymer is physisorption on iron surface. Under confinement by iron surfaces, the copolymer molecules form lamellar structure in aqueous solution and behave differently from its bulk state. The lubrication performance of aqueous copolymer lubricant increases with concentration, but the friction reduction is insignificant at high loading pressure. Additionally, the plastic deformation of asperity is dependent on both copolymer concentration and loading pressure, and the wear behavior shows a linear dependence of friction force on the number of transferred atoms between contacting asperities.
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Affiliation(s)
- Thi D Ta
- School of Mechanical, Materials and Mechatronic Engineering, Faculty of Engineering and Information Sciences (EIS), University of Wollongong , Northfield Avenue, Wollongong, New South Wales 2522, Australia
| | - A Kiet Tieu
- School of Mechanical, Materials and Mechatronic Engineering, Faculty of Engineering and Information Sciences (EIS), University of Wollongong , Northfield Avenue, Wollongong, New South Wales 2522, Australia
| | - Hongtao Zhu
- School of Mechanical, Materials and Mechatronic Engineering, Faculty of Engineering and Information Sciences (EIS), University of Wollongong , Northfield Avenue, Wollongong, New South Wales 2522, Australia
| | - Qiang Zhu
- School of Mechanical, Materials and Mechatronic Engineering, Faculty of Engineering and Information Sciences (EIS), University of Wollongong , Northfield Avenue, Wollongong, New South Wales 2522, Australia
| | - Prabouno B Kosasih
- School of Mechanical, Materials and Mechatronic Engineering, Faculty of Engineering and Information Sciences (EIS), University of Wollongong , Northfield Avenue, Wollongong, New South Wales 2522, Australia
| | - Jie Zhang
- School of Mechanical, Materials and Mechatronic Engineering, Faculty of Engineering and Information Sciences (EIS), University of Wollongong , Northfield Avenue, Wollongong, New South Wales 2522, Australia
| | - Guanyu Deng
- School of Mechanical, Materials and Mechatronic Engineering, Faculty of Engineering and Information Sciences (EIS), University of Wollongong , Northfield Avenue, Wollongong, New South Wales 2522, Australia
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17
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Sellberg JA, Kaya S, Segtnan VH, Chen C, Tyliszczak T, Ogasawara H, Nordlund D, Pettersson LGM, Nilsson A. Comparison of x-ray absorption spectra between water and ice: new ice data with low pre-edge absorption cross-section. J Chem Phys 2015; 141:034507. [PMID: 25053326 DOI: 10.1063/1.4890035] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The effect of crystal growth conditions on the O K-edge x-ray absorption spectra of ice is investigated through detailed analysis of the spectral features. The amount of ice defects is found to be minimized on hydrophobic surfaces, such as BaF2(111), with low concentration of nucleation centers. This is manifested through a reduction of the absorption cross-section at 535 eV, which is associated with distorted hydrogen bonds. Furthermore, a connection is made between the observed increase in spectral intensity between 544 and 548 eV and high-symmetry points in the electronic band structure, suggesting a more extended hydrogen-bond network as compared to ices prepared differently. The spectral differences for various ice preparations are compared to the temperature dependence of spectra of liquid water upon supercooling. A double-peak feature in the absorption cross-section between 540 and 543 eV is identified as a characteristic of the crystalline phase. The connection to the interpretation of the liquid phase O K-edge x-ray absorption spectrum is extensively discussed.
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Affiliation(s)
- Jonas A Sellberg
- Department of Physics, AlbaNova University Center, Stockholm University, S-106 91 Stockholm, Sweden
| | - Sarp Kaya
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Vegard H Segtnan
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Chen Chen
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Tolek Tyliszczak
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Hirohito Ogasawara
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, P.O. Box 20450, Stanford, California 94309, USA
| | - Dennis Nordlund
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, P.O. Box 20450, Stanford, California 94309, USA
| | - Lars G M Pettersson
- Department of Physics, AlbaNova University Center, Stockholm University, S-106 91 Stockholm, Sweden
| | - Anders Nilsson
- Department of Physics, AlbaNova University Center, Stockholm University, S-106 91 Stockholm, Sweden
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18
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Waluyo I, Nordlund D, Bergmann U, Schlesinger D, Pettersson LGM, Nilsson A. A different view of structure-making and structure-breaking in alkali halide aqueous solutions through x-ray absorption spectroscopy. J Chem Phys 2015; 140:244506. [PMID: 24985653 DOI: 10.1063/1.4881600] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
X-ray absorption spectroscopy measured in transmission mode was used to study the effect of alkali and halide ions on the hydrogen-bonding (H-bonding) network of water. Cl(-) and Br(-) are shown to have insignificant effect on the structure of water while I(-) locally weakens the H-bonding, as indicated by a sharp increase of the main-edge feature in the x-ray absorption spectra. All alkali cations act as structure-breakers in water, weakening the H-bonding network. The spectral changes are similar to spectra of high density ices where the 2nd shell has collapsed due to a break-down of the tetrahedral structures, although here, around the ions, the breakdown of the local tetrahedrality is rather due to non-directional H-bonding to the larger anions. In addition, results from temperature-dependent x-ray Raman scattering measurements of NaCl solution confirm the H-bond breaking effect of Na(+) and the effect on the liquid as similar to an increase in temperature.
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Affiliation(s)
- Iradwikanari Waluyo
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, P.O. Box 20450, Stanford, California 94309, USA
| | - Dennis Nordlund
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, P.O. Box 20450, Stanford, California 94309, USA
| | - Uwe Bergmann
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, P.O. Box 20450, Stanford, California 94309, USA
| | - Daniel Schlesinger
- Department of Physics, AlbaNova University Center, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Lars G M Pettersson
- Department of Physics, AlbaNova University Center, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Anders Nilsson
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, P.O. Box 20450, Stanford, California 94309, USA
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19
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Kimmel GA, Zubkov T, Smith RS, Petrik NG, Kay BD. Turning things downside up: Adsorbate induced water flipping on Pt(111). J Chem Phys 2014; 141:18C515. [DOI: 10.1063/1.4896226] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Greg A. Kimmel
- Physical Sciences Division, Pacific Northwest National Laboratory, MSIN K8-88, P.O. Box 999, Richland, Washington 99352, USA
| | - Tykhon Zubkov
- Physical Sciences Division, Pacific Northwest National Laboratory, MSIN K8-88, P.O. Box 999, Richland, Washington 99352, USA
| | - R. Scott Smith
- Physical Sciences Division, Pacific Northwest National Laboratory, MSIN K8-88, P.O. Box 999, Richland, Washington 99352, USA
| | - Nikolay G. Petrik
- Physical Sciences Division, Pacific Northwest National Laboratory, MSIN K8-88, P.O. Box 999, Richland, Washington 99352, USA
| | - Bruce D. Kay
- Physical Sciences Division, Pacific Northwest National Laboratory, MSIN K8-88, P.O. Box 999, Richland, Washington 99352, USA
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Abstract
In this study, we use density functional theory (DFT) to investigate the surface co-adsorption of glycine with water on Cu{110}. Our results show that, under UHV conditions and for a wide range of temperatures, a pure glycine monolayer is more stable than either mixed gly-water phases or pure water (ice) monolayers, but for a high water pressure half-dissociated water layers can appear on the surface at low and medium temperatures.
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Affiliation(s)
- Marco Sacchi
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.
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21
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Revilla-López G, López N. A unified study for water adsorption on metals: meaningful models from structural motifs. Phys Chem Chem Phys 2014; 16:18933-40. [DOI: 10.1039/c4cp02508c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We present a comprehensive structural model that allows the rapid assessment of the first layer of water adsorption on metals for different motifs.
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Affiliation(s)
| | - Núria López
- Institute of Chemical Research of Catalonia
- ICIQ
- 43007 Tarragona, Spain
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22
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Pettersson LGM, Nilsson A. A Molecular Perspective on the d-Band Model: Synergy Between Experiment and Theory. Top Catal 2013. [DOI: 10.1007/s11244-013-0157-4] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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23
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Schiros T, Andersson KJ, MacNaughton J, Gladh J, Matsuda A, Öström H, Takahashi O, Pettersson LGM, Nilsson A, Ogasawara H. Unique water-water coordination tailored by a metal surface. J Chem Phys 2013; 138:234708. [DOI: 10.1063/1.4809680] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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24
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Sokaras D, Weng TC, Nordlund D, Alonso-Mori R, Velikov P, Wenger D, Garachtchenko A, George M, Borzenets V, Johnson B, Rabedeau T, Bergmann U. A seven-crystal Johann-type hard x-ray spectrometer at the Stanford Synchrotron Radiation Lightsource. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:053102. [PMID: 23742527 PMCID: PMC4108715 DOI: 10.1063/1.4803669] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Accepted: 04/18/2013] [Indexed: 05/22/2023]
Abstract
We present a multicrystal Johann-type hard x-ray spectrometer (~5-18 keV) recently developed, installed, and operated at the Stanford Synchrotron Radiation Lightsource. The instrument is set at the wiggler beamline 6-2 equipped with two liquid nitrogen cooled monochromators--Si(111) and Si(311)--as well as collimating and focusing optics. The spectrometer consists of seven spherically bent crystal analyzers placed on intersecting vertical Rowland circles of 1 m of diameter. The spectrometer is scanned vertically capturing an extended backscattering Bragg angular range (88°-74°) while maintaining all crystals on the Rowland circle trace. The instrument operates in atmospheric pressure by means of a helium bag and when all the seven crystals are used (100 mm of projected diameter each), has a solid angle of about 0.45% of 4π sr. The typical resolving power is in the order of E/ΔE ~ 10,000. The spectrometer's high detection efficiency combined with the beamline 6-2 characteristics permits routine studies of x-ray emission, high energy resolution fluorescence detected x-ray absorption and resonant inelastic x-ray scattering of very diluted samples as well as implementation of demanding in situ environments.
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Affiliation(s)
- D Sokaras
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
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25
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Jones G, Jenkins SJ. Water and ammonia on Cu{110}: comparative structure and bonding. Phys Chem Chem Phys 2013; 15:4785-98. [DOI: 10.1039/c3cp42658k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Starr DE, Liu Z, Hävecker M, Knop-Gericke A, Bluhm H. Investigation of solid/vapor interfaces using ambient pressure X-ray photoelectron spectroscopy. Chem Soc Rev 2013; 42:5833-57. [DOI: 10.1039/c3cs60057b] [Citation(s) in RCA: 313] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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27
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Guo CS, Sun L, Hermann K, Hermanns CF, Bernien M, Kuch W. X-ray absorption from large molecules at metal surfaces: theoretical and experimental results for Co-OEP on Ni(100). J Chem Phys 2012. [PMID: 23181328 DOI: 10.1063/1.4765373] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Metal octaethylporphyrins (M-OEP), M-N(4)C(20)H(4)(C(2)H(5))(8), adsorbed at a metallic substrate are promising candidates to provide spin dependent electric transport. Despite these systems having been studied extensively by experiment, details of the adsorbate geometry and surface binding are still unclear. We have carried out density functional theory calculations for cobalt octaethyl porphyrin (Co-OEP) adsorbate at clean and oxygen-covered Ni(100) surfaces as well as for the free Co-OEP molecule where equilibrium structures were obtained by corresponding energy optimizations. These geometries were then used in calculations of Co-OEP carbon and nitrogen 1s core excitations yielding theoretical excitation spectra to be compared with corresponding K-edge x-ray absorption fine structure (NEXAFS) measurements. The experimental NEXAFS spectra near the carbon K-edge of Co-OEP bulk material show large intensity close to the ionization threshold and a triple-peak structure at lower energies, which can be reproduced by the calculations on free Co-OEP. The experimental nitrogen K-edge spectra of adsorbed Co-OEP layers exhibit always a double-peak structure below ionization threshold, independent of the layer thickness. The peaks are shifted slightly and their separation varies with adsorbate-substrate distance. This can be explained by hybridization of N 2p with corresponding 3d contributions of the Ni substrate in the excited final state orbitals as a result of adsorbate-substrate binding via N-Ni bond formation.
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Affiliation(s)
- C S Guo
- Inorganic Chemistry Department, Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany
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28
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Ding Y, Iannuzzi M, Hutter J. Nano-ice models for the water aggregates observed on the h-BN/Rh(111) nanomesh. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:445002. [PMID: 22989941 DOI: 10.1088/0953-8984/24/44/445002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
When a large amount of water is deposited onto a bare h-BN/Rh(111) nanomesh, the formation of ordered and stable nano-ice crystals in the pores has been experimentally observed. The present work proposes different possible models for the structure of the observed clusters, based on density functional theory calculations of two-dimensional water lattices adsorbed on free-standing hexagonal BN. Through the investigation of the electronic properties, the interaction with BN, and the distribution of the molecular dipoles, the most probable two-dimensional arrangement has been identified. Finally, a model is proposed for the nano-ice cluster trapped in the pore of the nanomesh, which constitutes 38 molecules distributed according to the most probable two-dimensional arrangement on free-standing BN. Structural and electronic properties of the optimized nano-ice cluster are also reported, and it is shown that the model is consistent with the experimental observation.
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Affiliation(s)
- Yun Ding
- Institute of Physical Chemistry, University of Zurich, Zurich, Switzerland
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29
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Shevkunov SV. Collective interactions in the mechanism of adhesion of condensed phase nuclei to a crystal surface. 1. Spatial organization. COLLOID JOURNAL 2012. [DOI: 10.1134/s1061933x12050110] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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30
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McBride F, Omer A, Clay CM, Cummings L, Darling GR, Hodgson A. Strain relief and disorder in commensurate water layers formed on Pd(111). JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:124102. [PMID: 22394691 DOI: 10.1088/0953-8984/24/12/124102] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Water adsorbs and desorbs intact on Pd(111), forming a hydrogen-bonded wetting layer whose structure we examine by low energy electron diffraction (LEED) and He atom scattering (HAS). LEED shows that water forms commensurate (√3 × √3)R30° clusters that aggregate into a partially ordered, approximately (7 × 7) superstructure as the layer completes. HAS indicates that the water layer remains disordered on a local (approximately 10 Å) scale. Based on workfunction measurements and density functional theory simulations we propose that water forms small, flat domains of a commensurate (√3 × √3)R30° water network, separated by disordered domain boundaries containing largely H-down water. This arrangement allows the water layer to adapt its density and relieve the lateral strain associated with adsorbing water in the optimum flat atop adsorption site. We discuss different possibilities for the structure of these domain walls and compare this strain relief mechanism to the highly ordered, large unit cell structures formed on surfaces such as Pt(111).
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Affiliation(s)
- F McBride
- Surface Science Research Centre, University of Liverpool, Liverpool L69 3BX, UK
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31
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Hamada I, Meng S. Water wetting on representative metal surfaces: Improved description from van der Waals density functionals. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2011.11.070] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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32
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Forster M, Raval R, Carrasco J, Michaelides A, Hodgson A. Water-hydroxyl phases on an open metal surface: breaking the ice rules. Chem Sci 2012. [DOI: 10.1039/c1sc00355k] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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33
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34
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Huang N, Nordlund D, Huang C, Bergmann U, Weiss TM, Pettersson LGM, Nilsson A. X-ray Raman scattering provides evidence for interfacial acetonitrile-water dipole interactions in aqueous solutions. J Chem Phys 2011; 135:164509. [PMID: 22047254 PMCID: PMC3298555 DOI: 10.1063/1.3655468] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2011] [Accepted: 10/04/2011] [Indexed: 12/21/2022] Open
Abstract
Aqueous solutions of acetonitrile (MeCN) have been studied with oxygen K-edge x-ray Raman scattering (XRS) which is found to be sensitive to the interaction between water and MeCN. The changes in the XRS spectra can be attributed to water directly interacting with MeCN and are reproduced by density functional theory calculations on small clusters of water and MeCN. The dominant structural arrangement features dipole interaction instead of H-bonds between the two species as revealed by the XRS spectra combined with spectrum calculations. Small-angle x-ray scattering shows the largest heterogeneity for a MeCN to water ratio of 0.4 in agreement with earlier small-angle neutron scattering data.
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Affiliation(s)
- Ningdong Huang
- Stanford Synchrotron Radiation Lightsource, P.O.B. 20450, Stanford, California 94309, USA
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35
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Shavorskiy A, Aksoy F, Grass ME, Liu Z, Bluhm H, Held G. A Step toward the Wet Surface Chemistry of Glycine and Alanine on Cu{110}: Destabilization and Decomposition in the Presence of Near-Ambient Water Vapor. J Am Chem Soc 2011; 133:6659-67. [PMID: 21473591 DOI: 10.1021/ja110910y] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andrey Shavorskiy
- Department of Chemistry, The University of Reading, Whiteknights, Reading, RG6 6AD, U.K
| | - Funda Aksoy
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Physics, Faculty of Arts and Sciences, Nigde University, Nigde, Turkey
| | - Michael E. Grass
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Zhi Liu
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Hendrik Bluhm
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Georg Held
- Department of Chemistry, The University of Reading, Whiteknights, Reading, RG6 6AD, U.K
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36
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Forster M, Raval R, Hodgson A, Carrasco J, Michaelides A. c(2×2) water-hydroxyl layer on Cu(110): a wetting layer stabilized by Bjerrum defects. PHYSICAL REVIEW LETTERS 2011; 106:046103. [PMID: 21405340 DOI: 10.1103/physrevlett.106.046103] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2010] [Indexed: 05/30/2023]
Abstract
Understanding the composition and stability of mixed water-hydroxyl layers is a key step in describing wetting and how surfaces respond to redox processes. Here we show that, instead of forming a complete hydrogen bonding network, structures containing an excess of water over hydroxyl are stabilized on Cu(110) by forming a distorted hexagonal network of water-hydroxyl trimers containing Bjerrum defects. This arrangement maximizes the number of strong bonds formed by water donation to OH and provides uncoordinated OH groups able to hydrogen bond multilayer water and nucleate growth.
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Affiliation(s)
- Matthew Forster
- Surface Science Research Centre, University of Liverpool, Liverpool, United Kingdom
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37
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Dau H, Limberg C, Reier T, Risch M, Roggan S, Strasser P. The Mechanism of Water Oxidation: From Electrolysis via Homogeneous to Biological Catalysis. ChemCatChem 2010. [DOI: 10.1002/cctc.201000126] [Citation(s) in RCA: 1320] [Impact Index Per Article: 94.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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38
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Schiros T, Takahashi O, Andersson KJ, Öström H, Pettersson LGM, Nilsson A, Ogasawara H. The role of substrate electrons in the wetting of a metal surface. J Chem Phys 2010; 132:094701. [DOI: 10.1063/1.3292681] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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39
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Carrasco J, Michaelides A, Forster M, Haq S, Raval R, Hodgson A. A one-dimensional ice structure built from pentagons. NATURE MATERIALS 2009; 8:427-431. [PMID: 19270685 DOI: 10.1038/nmat2403] [Citation(s) in RCA: 130] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2008] [Accepted: 02/09/2009] [Indexed: 05/26/2023]
Abstract
Heterogeneous ice nucleation has a key role in fields as diverse as atmospheric chemistry and biology. Ice nucleation on metal surfaces affords an opportunity to watch this process unfold at the molecular scale on a well-defined, planar interface. A common feature of structural models for such films is that they are built from hexagonal arrangements of molecules. Here we show, through a combination of scanning tunnelling microscopy, infrared spectroscopy and density-functional theory, that about 1-nm-wide ice chains that nucleate on Cu(110) are not built from hexagons, but instead are built from a face-sharing arrangement of water pentagons. The pentagon structure is favoured over others because it maximizes the water-metal bonding while maintaining a strong hydrogen-bonding network. It reveals an unanticipated structural adaptability of water-ice films, demonstrating that the presence of the substrate can be sufficient to favour non-hexagonal structural units.
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Affiliation(s)
- Javier Carrasco
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
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40
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Zhao W, Wang J, Liu F, Chen D. Equilibrium geometric structure and electronic properties of Cl and H2O co-adsorption on Fe (100) surface. Sci Bull (Beijing) 2009. [DOI: 10.1007/s11434-009-0199-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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41
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Beniya A, Sakaguchi Y, Narushima T, Mukai K, Yamashita Y, Yoshimoto S, Yoshinobu J. The growth process of first water layer and crystalline ice on the Rh(111) surface. J Chem Phys 2009; 130:034706. [DOI: 10.1063/1.3060952] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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42
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Leetmaa M, Wikfeldt KT, Ljungberg MP, Odelius M, Swenson J, Nilsson A, Pettersson LGM. Diffraction and IR/Raman data do not prove tetrahedral water. J Chem Phys 2008; 129:084502. [DOI: 10.1063/1.2968550] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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43
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Michaelides A. Simulating ice nucleation, one molecule at a time, with the 'DFT microscope'. Faraday Discuss 2007; 136:287-97; discussion 309-28. [PMID: 17955816 DOI: 10.1039/b616689j] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Few physical processes are as ubiquitous as the nucleation of water into ice. However, ice nucleation and, in particular, heterogeneously catalyzed nucleation remains poorly understood at the atomic level. Here, we report an initial series of density functional theory (DFT) calculations aimed at putting our understanding of ice nucleation and water clustering at metallic surfaces on a firmer footing. Taking a prototype hydrophobic metal surface, Cu(111), for which scanning tunneling microscopy measurements of water clustering have recently been performed, possible structures of adsorbed clusters comprised of 2-6 H2O molecules have been computed. How the water clusters in this size regime differ from those in the gas phase is discussed, as is the nature of their interaction with the substrate.
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Affiliation(s)
- Angelos Michaelides
- London Centre for Nanotechnology, University College London, London, UK WC1E 6BT
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Tang QL, Chen ZX. Influence of aggregation, defects, and contaminant oxygen on water dissociation at Cu(110) surface: A theoretical study. J Chem Phys 2007; 127:104707. [PMID: 17867769 DOI: 10.1063/1.2751154] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The DFT-PW91 slab model approach is employed to investigate the influence of aggregation, surface defects, and contaminant oxygen on water dissociation on Cu(110) at low temperatures. The dissociation barriers of water in various aggregate states are calculated in the range of 60-75 kJ/mol on the clean surfaces, in nice agreement with the experimentally determined values. It is revealed that the aggregation of water shows no propensity to reduce the activation barrier for the O-H bond breaking on Cu(110), at variance with the water chemistry on Ru(0001). The calculated activation energy on Cu(211) which is the most active stepped surface investigated is equal to the value on the (110) surface, indicating that the hydroxyl groups observed on Cu(110) at low temperatures may not stem from surface defects. The coadsorbed oxygen, whether as a "spectator" or a "participant," facilitates the water dissociation both kinetically and thermodynamically.
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Affiliation(s)
- Qian-Lin Tang
- Institute of Theoretical and Computational Chemistry, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People's Republic of China
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Michaelides A, Morgenstern K. Ice nanoclusters at hydrophobic metal surfaces. NATURE MATERIALS 2007; 6:597-601. [PMID: 17572679 DOI: 10.1038/nmat1940] [Citation(s) in RCA: 163] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2006] [Accepted: 05/18/2007] [Indexed: 05/15/2023]
Abstract
Studies of the structure of supported water clusters provide a means for obtaining a rigorous molecular-scale description of the initial stages of heterogeneous ice nucleation: a process of importance to fields as diverse as atmospheric chemistry, astrophysics and biology. Here, we report the observation and characterization of metal-supported water hexamers and a family of hydrated nanoclusters--heptamers, octamers and nonamers--through a combination of low-temperature scanning tunnelling microscopy experiments and first-principles electronic-structure calculations. Aside from achieving unprecedented resolution of the cyclic water hexamer--the so-called smallest piece of ice--we identify and explain a hitherto unknown competition between the ability of water molecules to simultaneously bond to a substrate and to accept hydrogen bonds. This competition also rationalizes previous structure predictions for water clusters on other substrates.
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Affiliation(s)
- Angelos Michaelides
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany.
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