Electronic structure of tetrahedral oxyanions of elements of the third period

1968 ◽  
Vol 9 (1) ◽  
pp. 107-112 ◽  
Author(s):  
V. I. Nefedov ◽  
V. A. Fomichev
Keyword(s):  
Electronic Structure ◽  
The Third ◽  
Tetrahedral Oxyanions

scholarly journals Communication—Fe-MOF Exhibits Higher Oxygen Evolution Ability by Electronic Modulation of Sodium Hypochlorite

2021 ◽  
Author(s):  
Guomei Mu ◽  
Yujie Miao ◽  
Mengjiao Wu ◽  
Qiaoyue Xiang ◽  
Dunmin Lin ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Sodium Hypochlorite ◽  
Terephthalic Acid ◽  
Function Theory ◽  
Nickel Foam ◽  
Density Function Theory ◽  
The Third ◽  
Fe Sites

Abstract Development of robust alkaline oxygen evolution reaction electrocatalysts is crucial for the efficiency of water splitting. Herein, Fe-MOF nanocones array on nickel foam are synthesized by introducing sodium hypochlorite, leading to Cl substitution of terephthalic acid in Fe-MOFs (Fe-MOF-Cl/NF). Experimental results show that Fe-MOF-Cl/NF exhibits enhanced OER activity over Fe-MOF/NF, lowering η50 from 292.4 to 222.7 mV. In combination with density function theory calculations, the improved OER performance is attributed to engineering electronic structure of Fe sites which accelerate the third step from *O to *OOH, and promote OER kinetics. Additionally, Fe-MOF-Cl/NF can retain catalytic activity for 100 h.

Orbitals and bands at metal surfaces: photoemission from the {110} surface of tungsten

1981 ◽  
Vol 376 (1767) ◽  
pp. 565-583 ◽  
Keyword(s):  
Electronic Structure ◽  
Band Structure ◽  
Surface State ◽  
Photon Emission ◽  
Tight Binding ◽  
Tight Binding Approximation ◽  
The Third ◽  
Surface Brillouin Zone ◽  
Orbital Character ◽  
Bulk Band

The electronic structure of the {110} surface of tungsten has been investigated by using angle-resolved photoemission. A surface state has been identified and characterized throughout the surface Brillouin zone (s. B. z.). Its dispersion is found to correlate with the projected band gap between the third and fourth bands of the tungsten bulk band structure. It is identified by comparison with Inglesfield’s calculation as having predominantly m = 1 d-orbital character. With photon energies of 21.2 and 40.8 eV, intense photoemission from the surface state is only observed after surface Umklapp, whereas, with 16.8 eV, photon emission is observed in both the first and second s. B. zs. The applicability of the tight-binding approximation to the elucidation of the electronic structure of a metal surface is examined with particular reference to this surface state. A qualitative analysis of the observed photoemission intensities is consistent with emission from a tungsten e g orbital that is hybridized with e g orbitals on neighbouring atoms.

THE THIRD SPECTRUM OF RHODIUM (Rh III)

1966 ◽  
Vol 44 (4) ◽  
pp. 895-915 ◽  
Author(s):  
Laura Iglesias
Keyword(s):  
Electronic Structure ◽  
Previous Analysis ◽  
Energy Levels ◽  
The Third ◽  
New Energy ◽  
Theoretical Predictions ◽  
Electronic Configurations ◽  
Good Agreement

The description of the Rh III spectrum has been extended and a new study of its electronic structure has been made. As a result of this investigation a previous analysis has been corrected and 154 new energy levels from the electronic configurations 4d7, 4d65s, and 4d65p have been determined. These are in very good agreement with the theoretical predictions.

Ultrasonic studies of the electronic structure of hexagonal metal crystals II. Superconducting state in zinc and cadmium

1973 ◽  
Vol 334 (1598) ◽  
pp. 379-396 ◽  
Keyword(s):  
Electronic Structure ◽  
Simple Model ◽  
Temperature Dependence ◽  
Energy Gap ◽  
Realistic Model ◽  
Pure Zinc ◽  
The Third ◽  
Energy Gaps ◽  
Gap Parameter ◽  
Complicated Variation

Measurements have been made of the temperature dependence of the attenuation of longitudinal ultrasound in the superconducting states of pure zinc and cadmium for propagation along the and <0001>, <101 ¯ 0> and <112 ¯ 0> directions, at frequencies from 40 to 160 MHz. This temperature dependence has been interpreted in terms of an energy gap parameter A = 2∆(0)/ kT c . In zinc, for T < ½ T c , A was found to be 3.41 ± 0.1, 3.79 ± 0.1 and 3.64 ± 0.1 for the <0001>, <101 ¯ 0> and <122 ¯ 0> directions respectively. The corresponding values for cadmium were 3.29 ± 0.1, 2.80 ± 0.1 and 3.87 ± 0.1. A simple model proposed by Hays for the distribution of the energy gaps on the Fermi surface of zinc does not explain these results, and a more realistic model has been proposed. The main features of the proposed energy-gap distributions in zinc and cadmium are that the electrons on the third band lens have larger energy gaps than those on the second band monster, over which there is a large and complicated variation.

Local Environment and Electronic Structure in K2NiF4-type La2Li0.50Cu0.50O4 Doped by 57Fe

2008 ◽  
Vol 63 (3) ◽  
pp. 244-250 ◽  
Author(s):  
Igor Presniakov ◽  
Gerard Demazeau ◽  
Alexei Baranov ◽  
Alexei Sobolev ◽  
Tatiyana Gubaidulina ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Charge Transfer ◽  
Oxygen Vacancies ◽  
Local Environment ◽  
Drastic Change ◽  
Mossbauer Spectrum ◽  
Mössbauer Spectrum ◽  
The Third ◽  
Mössbauer Parameters

The 57Fe Mössbauer spectrum of the oxide La2Li0.50Cu0.50O4 doped with 57Fe (1 at.-%) underlines at 300 K the presence of three different components: two corresponding to the substitution of 57Fe probe atoms for respectively “Cu3+” [Fe(1)] and Li+ [Fe(3)] and the third [Fe(2)] attributed to 57Fe associated with oxygen vacancies. A decrease of the temperature down to 77 K does not lead to essential changes of the Mössbauer parameters corresponding to the Fe(1) and Fe(2) sub-spectra. On the contrary, a drastic change occurs in the Fe(3) sub-spectrum which has been interpreted by a displacement of the charge-transfer equilibrium Fe4+(3) + O2− → Fe3+(3) + O(L̲) at the Li+ sites.

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