The structure of water on rutile TiO2(110) for applications in solar hydrogen production: towards a predictive model using hybrid-exchange density functional theory

2013 ◽  
Vol 1542 ◽  
Author(s):  
M. Patel ◽  
G. Mallia ◽  
N. M. Harrison
Keyword(s):  
Density Functional Theory ◽  
Predictive Model ◽  
Water Oxidation ◽  
Density Functional ◽  
Water Molecules ◽  
Adsorbed Species ◽  
Functional Theory ◽  
Solar Hydrogen ◽  
Structure Of Water ◽  
Solar Hydrogen Production

ABSTRACTPeriodic hybrid-exchange density functional theory (DFT) simulations are used to develop a predictive model of the structure of water on the rutile TiO2(110) surface (Θ ≤ 1 ML). A description of the adsorbed species is given: dissociated water molecules and either mixed or dissociative dimers. The behaviour of the adsorbates is rationalised by considering both direct intermolecular and surface-mediated interactions. Some of these results are then compared with those from water adsorption on the rutile SnO2(110) sur- face, isostructural to TiO2(110). Lastly, the electronic structure of the surface in contact with monolayer water (Θ = 1 ML) reveals the contributions of adsorbate states involved in the photocatalytic reaction that controls the water oxidation process.

scholarly journals A metal sulfide photocatalyst composed of ubiquitous elements for solar hydrogen production

2016 ◽  
Vol 52 (47) ◽  
pp. 7470-7473 ◽  
Author(s):  
Y. Shiga ◽  
N. Umezawa ◽  
N. Srinivasan ◽  
S. Koyasu ◽  
E. Sakai ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Hydrogen Production ◽  
Dft Calculations ◽  
Visible Light ◽  
Density Functional ◽  
Metal Sulfide ◽  
Tin Sulfide ◽  
Functional Theory ◽  
Solar Hydrogen ◽  
Solar Hydrogen Production

A visible-light-sensitive tin sulfide photocatalyst was designed based on a ubiquitous element strategy and density functional theory (DFT) calculations.

scholarly journals Bias-dependent local structure of water molecules at a metallic interface

2018 ◽  
Vol 9 (1) ◽  
pp. 62-69 ◽  
Author(s):  
Luana S. Pedroza ◽  
Pedro Brandimarte ◽  
Alexandre Reily Rocha ◽  
M.-V. Fernández-Serra
Keyword(s):  
Density Functional Theory ◽  
Water Molecule ◽  
Electronic Properties ◽  
Local Structure ◽  
Density Functional ◽  
Water Molecules ◽  
Functional Theory ◽  
Structure Of Water ◽  
Metallic Interfaces ◽  
Non Equilibrium Green’S Function

We combine Density Functional Theory (DFT) and Non-Equilibrium Green’s Function (NEGF) methods to study the electronic properties and atomic forces of a water molecule at metallic interfaces.

scholarly journals Hydration Dependent Band Gap Tunability of Self-Assembled Phenylalanine-Tryptophan Nanotubes

2020 ◽  
Author(s):  
Hugo Souza ◽  
Antonio Chaves Neto ◽  
Francisco Sousa ◽  
Rodrigo Amorim ◽  
Alexandre Reily Rocha ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Band Gap ◽  
Electronic Properties ◽  
Building Block ◽  
Density Functional ◽  
Tight Binding ◽  
Water Molecules ◽  
Confined Water ◽  
Functional Theory ◽  
Tight Binding Method

In this work, we investigate the effects of building block separation of Phenylalanine-Tryptophan nanotube induced by the confined water molecules on the electronic properties using density-functional theory based tight-binding method. <div><br></div>

scholarly journals Supramolecular Complexes of Cucurbiturils with Second Group Metal Salts and Hydrates and Histamine

INEOS OPEN ◽  
2021 ◽  
Vol 4 ◽  
Author(s):  
Yu. A. Borisov ◽  
◽  
S. S. Kiselev ◽  
Keyword(s):  
Aqueous Solution ◽  
Density Functional Theory ◽  
Density Functional ◽  
Metal Salts ◽  
Supramolecular Complexes ◽  
Water Molecules ◽  
Functional Theory ◽  
Guest Molecules ◽  
First Time ◽  
Formation Energies

The interaction of cucurbiturils (Q6, Q7, and Q8) with Ca and Ba chlorides and iodides are studied for the first time by density functional theory. The thermodynamic parameters for the formation of host–guest complexes are calculated. The structures of complexes of Q6 and Q7 with one and two guest molecules are established. The energy parameters for the transfer of Be2+ and Ba2+ cations from an aqueous solution into the cavity of Q7 containing n water molecules are defined. The dependences of the formation energies for complexes Q7WnBe2+ and Q7WnBa2+ on the number of water molecules are shown to be parabolic, with the energy minima at n = 5 and n = 6, respectively. It is found that Q7 can form in an aqueous solution supramolecular complexes with protonated histamine (HA) and neutral histamine in the presence of Ca2+ ions.

Ruthenium-based catalysts for water oxidation: the key role of carboxyl groups as proton acceptors

2020 ◽  
Vol 22 (9) ◽  
pp. 5249-5254 ◽  
Author(s):  
Yuting Liu ◽  
Xiaofang Su ◽  
Wei Guan ◽  
Likai Yan
Keyword(s):  
Density Functional Theory ◽  
Dft Calculations ◽  
Water Oxidation ◽  
Density Functional ◽  
Carboxyl Groups ◽  
Functional Theory

In this work, the mechanism of water oxidation catalyzed by an Ru-based complex [Ru(L)]+ (L = 5,5-chelated 2-carboxy-phen, 2,2′;6′,2′′-terpyridine) was studied by density functional theory (DFT) calculations.

Density Functional Theory Based Modeling of the Corrosion on Iron Surfaces

2013 ◽  
Vol 58 (2) ◽  
pp. 321-323 ◽  
Author(s):  
N. Nunomura ◽  
S. Sunada
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Atomic Orbital ◽  
Atomic Layer ◽  
Iron Surface ◽  
Basis Set ◽  
Water Molecules ◽  
Aqueous Corrosion ◽  
Functional Theory ◽  
Adsorption Of Water

In order to understand the first steps of the aqueous corrosion of iron, we have performed density functional theory (DFT) based calculations for water molecules and pre-covered oxygen on iron surface. The surface structure is modeled by iron atomic layer and vacuum region, and then oxygen atom and water molecules are displaced on the surface. Self consistent DFT calculations were performed using a numerical atomic orbital basis set and a norm-conserve pseudopotential method. According to our calculations, with increasing surface oxygen coverage, the iron surface is found to be not activated, which leads to a feeble adsorption of water molecules on iron surface. Our results show that the surface covered oxygen exerts an influence on the adsorption of water molecules on iron surface.

scholarly journals Electrochemical water oxidation on WO3 surfaces: A density functional theory study

2019 ◽  
Vol 321-322 ◽  
pp. 94-99 ◽  
Author(s):  
Ravi Kishore ◽  
Xi Cao ◽  
Xueqing Zhang ◽  
Anja Bieberle-Hütter
Keyword(s):  
Density Functional Theory ◽  
Water Oxidation ◽  
Density Functional ◽  
Density Functional Theory Study ◽  
Functional Theory

Theoretical insights into the reactivity of Fe-based catalysts for water oxidation: the role of electron-withdrawing groups

2018 ◽  
Vol 20 (21) ◽  
pp. 14919-14926 ◽  
Author(s):  
Penglin Xu ◽  
Shaojin Hu ◽  
Hou-Dao Zhang ◽  
Xiao Zheng
Keyword(s):  
Density Functional Theory ◽  
Water Oxidation ◽  
Density Functional ◽  
Catalytic Efficiency ◽  
Oxidation Catalysts ◽  
Functional Theory

The relative catalytic efficiency of a series of Fe-based water oxidation catalysts is elucidated by comprehensive calculations using density functional theory methods.

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