Water on surfaces from first-principles molecular dynamics
Peiwei You(游佩桅)1,3, Jiyu Xu(徐纪玉)1,3, Cui Zhang(张萃)1,2, †, and Sheng Meng(孟胜)1,2,3,4$
1 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China 2 Songshan Lake Materials Laboratory, Dongguan 523808, China 3 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China 4 Collaborative Innovation Center of Quantum Matter, Beijing 100190, China
Water is ubiquitous and so is its presence in the proximity of surfaces. To determine and control the properties of interfacial water molecules at nanoscale is essential for its successful applications in environmental and energy-related fields. It is very challenging to explore the atomic structure and electronic properties of water under various conditions, especially at the surfaces. Here we review recent progress and open challenges in describing physicochemical properties of water on surfaces for solar water splitting, water corrosion, and desalination using first-principles approaches, and highlight the key role of these methods in understanding the complex electronic and dynamic interplay between water and surfaces. We aim at showing the importance of unraveling fundamental mechanisms and providing physical insights into the behavior of water on surfaces, in order to pave the way to water-related material design.
Received: 25 May 2020
Revised: 25 May 2020
Accepted manuscript online: 03 July 2020
Fund: the National Key Basic Research Program of China (Grant Nos. 2016YFA0300902 and 2015CB921001), the National Natural Science Foundation of China (Grant Nos. 11974400, 91850120, and 11774396), and Strategic Priority Research Program B of the Chinese Academy of Sciences (Grant No. XDB070301).
Peiwei You(游佩桅), Jiyu Xu(徐纪玉), Cui Zhang(张萃), and Sheng Meng(孟胜)$ Water on surfaces from first-principles molecular dynamics 2020 Chin. Phys. B 29 116804
Fig. 1.
(a) Snapshot of the Au20 cluster in water, where yellow, red, and grey spheres represent gold, oxygen, and hydrogen atoms, respectively. The arrow denotes polarization direction of the laser field. (b) Time evolution of the laser field with field strength Emax = 2.3 V/Å and frequency ℏ ω = 2.81 eV. Under this laser pulse, time-evolved O–H bond lengths dOH of all water molecules with (c) and without (d) Au20 cluster are shown. (e) Atomic configurations at time t = 0, 16 fs, 18 fs, and 21 fs. Reprinted with permission from Ref. [32].
Fig. 2.
(a) Configuration of the initiation step of water trimer dissociation on the PuO2 (110) surface. (b) Electron density difference contour of the configuration shown in (a). Reprinted with permission from Ref. [63].
Fig. 3.
(a) The atomistic structure of graphdiyne. (b) The water flow across graphdiyne versus temperature and pressure. (c) the trajectories of proton diffusion at the water–graphdiyne interface. (d) The free energy barrier for transmembrane (TM) proton transfer and proton transfer in bulk water. The dash line indicates the kBT at 300 K. Reprinted with permission from Ref. [84].
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