A DFT+U study of the catalytic degradation of 1,2-dichloroethane over CeO2

2018 ◽  
Vol 20 (8) ◽  
pp. 5856-5864 ◽  
Author(s):  
Li-Li Yin ◽  
Guanzhong Lu ◽  
Xue-Qing Gong
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Oxygen Vacancies ◽  
Density Functional Theory Calculations ◽  
Catalytic Degradation ◽  
Bond Breaking ◽  
Surface Oxygen ◽  
Coulomb Interactions ◽  
Functional Theory ◽  
Adsorption Sites

The catalytic degradation of 1,2-dichloroethane (DCE) at CeO2(111) have been investigated by periodic density functional theory calculations corrected by on-site Coulomb interactions, and the surface oxygen vacancies were found to be important by providing the adsorption sites as well as charge transfer to favor the C–Cl bond breaking.

scholarly journals Study on the adsorption selection of CH$$_4$$ on CuO (110) versus (111) surfaces: a density functional theory study

2021 ◽  
Vol 3 (4) ◽  
Author(s):  
Long Lin ◽  
Linwei Yao ◽  
Shaofei Li ◽  
Zhengguang Shi ◽  
Kun Xie ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Adsorption Capacity ◽  
Active Sites ◽  
Density Functional ◽  
Oxygen Vacancies ◽  
Density Functional Theory Calculations ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Strong Adsorption ◽  
Selection Of

AbstractFinding the active sites of suitable metal oxides is a key prerequisite for detecting CH$$_4$$ 4 . The purpose of the paper is to investigate the adsorption of CH$$_4$$ 4 on intrinsic and oxygen-vacancies CuO (111) and (110) surfaces using density functional theory calculations. The results show that CH$$_4$$ 4 has a strong adsorption energy of −0.370 to 0.391 eV at all site on the CuO (110) surface. The adsorption capacity of CH$$_4$$ 4 on CuO (111) surface is weak, ranging from −0.156 to −0.325 eV. In the surface containing oxygen vacancies, the adsorption capacity of CuO surface to CH$$_4$$ 4 is significantly stronger than that of intrinsic CuO surface. The results indicate that CuO (110) has strong adsorption and charge transfer capacity for CH$$_4$$ 4 , which may provide experimental guidance.

scholarly journals Computational investigation of Zn-doped and undoped SrEu2Fe2O7 as potential mixed electron and proton conductors

RSC Advances ◽  
2020 ◽  
Vol 10 (66) ◽  
pp. 39988-39994
Author(s):  
Zongzi Jin ◽  
Ranran Peng ◽  
Yunpeng Xia ◽  
Zhenbin Wang ◽  
Wei Liu
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Oxygen Vacancies ◽  
Density Functional Theory Calculations ◽  
Proton Conductors ◽  
Computational Investigation ◽  
Functional Theory ◽  
Proton Defects

Density functional theory calculations are employed to investigate the formation and conducting behaviors of oxygen vacancies and proton defects in Ruddlesden–Popper oxide SrEu2Fe2O7.

EFFECTS OF SURFACE OXYGEN ON THE ELECTRONIC PROPERTIES OF SILICON NANOCLUSTERS

2006 ◽  
Vol 05 (01) ◽  
pp. 13-21 ◽  
Author(s):  
YING DAI ◽  
BAIBIAO HUANG ◽  
LIN YU ◽  
SHENGHAO HAN ◽  
DADI DAI
Keyword(s):  
Density Functional Theory ◽  
Electronic Properties ◽  
Density Functional ◽  
Energy Gap ◽  
Density Functional Theory Calculations ◽  
Bridge Structure ◽  
Surface Oxygen ◽  
Silicon Nanoclusters ◽  
Silicon Clusters ◽  
Functional Theory

We have studied the effects of surface oxygen and its bond structure on the electronic properties of silicon nanoclusters by means of density functional theory calculations. The results of the energy gap as a function of the nanocluster size in hydrogen-terminated and oxygen-adsorbed silicon clusters provide a well interpretation of several experiments. The nature of electronic and optical properties of silicon nanoclusters has been discussed and attributed to the oxygen in both the Si=O double bond structure and Si–O–Si bridge structure.

Germanium Adsorption on SrTiO3 (001) 2×1 Surface: A Density Functional Theory Study

2012 ◽  
Vol 463-464 ◽  
pp. 484-488
Author(s):  
Jun Jie Wang ◽  
Isabelle Lefebvre
Keyword(s):  
Density Functional Theory ◽  
Electronic Structures ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Lattice Parameter ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Adsorption Sites ◽  
Site Selectivity ◽  
Threading Defects

Integrating germanium on Si is one of the major challenges of epitaxial growth and presents important applicative interest. Recently, SrTiO3 was adopted as a buffer layer to accommodate the mismatch between Ge and Si. Germanium can take its bulk lattice parameter as soon as the growth begins without threading defects on SrTiO3 surface. However, the details of Ge adsorption on SrTiO3 surface are not clear. In present work, the electronic structures of Ge deposited on the SrTiO3 (001) 2×1 Double Layer (DL) TiO2 surfaces were investigated by means of density functional theory calculations. Several stable adsorption sites are identified. It is found that the germanium adsorption shows site selectivity and causes noticeable surface distortion. The charge transfer from germanium atom to surface contributes to the formation of strong Ge-O bondings and surface metallization.

CO oxidation over the polyoxometalate-supported single-atom catalysts M1/POM (Fe, Co, Mn, Ru, Rh, Os, Ir, and Pt; POM = [PW12O40]3–): a computational study on the activation of surface oxygen species

2019 ◽  
Vol 48 (18) ◽  
pp. 6228-6235 ◽  
Author(s):  
Chun-Guang Liu ◽  
Li-Long Zhang ◽  
Xue-Mei Chen
Keyword(s):  
Density Functional Theory ◽  
Co Oxidation ◽  
Density Functional ◽  
Computational Study ◽  
Density Functional Theory Calculations ◽  
Catalytic Performance ◽  
Single Atom ◽  
Oxygen Species ◽  
Surface Oxygen ◽  
Functional Theory

Density functional theory calculations have been carried out to explore the catalytic performance of a series of the M1/POM (M = Fe, Co, Mn, Ru, Rh, Os, Ir, and Pt; POM = [PW12O40]3−) single-atom catalysts for CO oxidation.

Calculations of NO reduction with CO over a Cu1/PMA single-atom catalyst: a study of surface oxygen species, active sites, and the reaction mechanism

2019 ◽  
Vol 21 (19) ◽  
pp. 9975-9986
Author(s):  
Chun-Guang Liu ◽  
Cong Sun ◽  
Meng-Xu Jiang ◽  
Li-Long Zhang ◽  
Mo-Jie Sun
Keyword(s):  
Density Functional Theory ◽  
Reaction Mechanism ◽  
Active Sites ◽  
Density Functional ◽  
No Reduction ◽  
Density Functional Theory Calculations ◽  
Single Atom ◽  
Oxygen Species ◽  
Surface Oxygen ◽  
Functional Theory

Density functional theory calculations have been employed to probe the reaction mechanism of NO reduction with CO over a Cu1/PMA (PMA is the phosphomolybdate, Cs3PMo12O40) single-atom catalyst.

Thermally activated surface oxygen defects at the perimeter of Au/TiO2: a DFT+U study

2015 ◽  
Vol 17 (38) ◽  
pp. 25403-25410 ◽  
Author(s):  
Muhammad Adnan Saqlain ◽  
Akhtar Hussain ◽  
Mohammad Siddiq ◽  
Ary R. Ferreira ◽  
Alexandre A. Leitão
Keyword(s):  
Density Functional Theory ◽  
Oxygen Atom ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Surface Oxygen ◽  
Functional Theory ◽  
Thermally Activated ◽  
Oxygen Defects ◽  
Model Surfaces ◽  
Activated Surface

Density functional theory calculations were performed to examine the formation of oxygen atom vacancies on three model surfaces namely, clean anatase TiO2(001) and, Au3 and Au10 clusters supported on anatase TiO2(001).

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