Excess Electrons Stabilized on Ionic Oxide Surfaces†

2006 ◽  
Vol 39 (11) ◽  
pp. 861-867 ◽  
Author(s):  
Mario Chiesa ◽  
Maria Cristina Paganini ◽  
Elio Giamello ◽  
Damien M. Murphy ◽  
Cristiana Di Valentin ◽  
...  
Keyword(s):  
Oxide Surfaces ◽  
Excess Electrons ◽  
Ionic Oxide

Excess Electrons Stabilized on Ionic Oxide Surfaces

ChemInform ◽  
2007 ◽  
Vol 38 (14) ◽  
Author(s):  
Mario Chiesa ◽  
Maria Cristina Paganini ◽  
Elio Giamello ◽  
Damien M. Murphy ◽  
Cristiana Di Valentin ◽  
...  
Keyword(s):  
Oxide Surfaces ◽  
Excess Electrons ◽  
Ionic Oxide

Surface area and the mechanism of hydroxylation of ionic oxide surfaces

1984 ◽  
Vol 80 (10) ◽  
pp. 2609 ◽  
Author(s):  
Colin F. Jones ◽  
Robyn A. Reeve ◽  
Rupert Rigg ◽  
Robert L. Segall ◽  
Roger St. C. Smart ◽  
...  
Keyword(s):  
Surface Area ◽  
Oxide Surfaces ◽  
Ionic Oxide

scholarly journals An essential descriptor for the oxygen evolution reaction on reducible metal oxide surfaces

2019 ◽  
Vol 10 (11) ◽  
pp. 3340-3345 ◽  
Author(s):  
Xiang Huang ◽  
Jiong Wang ◽  
Hua Bing Tao ◽  
Hao Tian ◽  
Hu Xu
Keyword(s):  
Metal Oxide ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Oxide Surfaces ◽  
Metal Oxide Surfaces ◽  
Excess Electrons

The number of excess electrons (NEE), as a descriptor, perfectly reproduces the OER volcano curve of TiO2(110) plotted using ΔGO − ΔGOH.

Excess Electrons at Oxide Surfaces

2015 ◽  
pp. 123-147
Author(s):  
Sylvie Bourgeois ◽  
Bruno Domenichini ◽  
Jacques Jupille
Keyword(s):  
Oxide Surfaces ◽  
Excess Electrons

The Nature of Oxide Surfaces: Topographic and Electronic Structure

1993 ◽  
Vol 51 ◽  
pp. 966-967
Author(s):  
Dawn A. Bonnell ◽  
Yong Liang
Keyword(s):  
Transition Metal Oxides ◽  
Electronic Structures ◽  
Recent Progress ◽  
Spatial Localization ◽  
Level Of Detail ◽  
Scanning Tunneling ◽  
Oxide Surfaces ◽  
Tunneling Microscopy ◽  
Considerable Effort ◽  
Complete Understanding

Recent progress in the application of scanning tunneling microscopy (STM) and tunneling spectroscopy (STS) to oxide surfaces has allowed issues of image formation mechanism and spatial resolution limitations to be addressed. As the STM analyses of oxide surfaces continues, it is becoming clear that the geometric and electronic structures of these surfaces are intrinsically complex. Since STM requires conductivity, the oxides in question are transition metal oxides that accommodate aliovalent dopants or nonstoichiometry to produce mobile carriers. To date, considerable effort has been directed toward probing the structures and reactivities of ZnO polar and nonpolar surfaces, TiO2 (110) and (001) surfaces and the SrTiO3 (001) surface, with a view towards integrating these results with the vast amount of previous surface analysis (LEED and photoemission) to build a more complete understanding of these surfaces. However, the spatial localization of the STM/STS provides a level of detail that leads to conclusions somewhat different from those made earlier.

scholarly journals Simultaneous Kinetics of Selenite Oxidation and Sorption on δ-MnO2 in Stirred-Flow Reactors

2021 ◽  
Vol 18 (6) ◽  
pp. 2902
Author(s):  
Zheyong Li ◽  
Yajun Yuan ◽  
Lin Ma ◽  
Yihui Zhang ◽  
Hongwei Jiang ◽  
...  
Keyword(s):  
Rate Constant ◽  
Photoelectron Spectroscopy ◽  
Oxide Surfaces ◽  
Kinetic Rate Constant ◽  
Flow Reactors ◽  
Mn Oxide ◽  
Remediation Strategies ◽  
Process Of Se ◽  
Kinetics Of

Selenium (Se) is an essential and crucial micronutrient for humans and animals, but excessive Se brings negativity and toxicity. The adsorption and oxidation of Se(IV) on Mn-oxide surfaces are important processes for understanding the geochemical fate of Se and developing engineered remediation strategies. In this study, the characterization of simultaneous adsorption, oxidation, and desorption of Se(IV) on δ-MnO2 mineral was carried out using stirred-flow reactors. About 9.5% to 25.3% of Se(IV) was oxidized to Se(VI) in the stirred-flow system in a continuous and slow process, with the kinetic rate constant k of 0.032 h−1, which was significantly higher than the apparent rate constant of 0.0014 h−1 obtained by the quasi-level kinetic fit of the batch method. The oxidation reaction was driven by proton concentration, and its rate also depended on the Se(IV) influent concentration, flow rate, and δ-MnO2 dosage. During the reaction of Se(IV) and δ-MnO2, Mn(II) was produced and adsorbed strongly on Mn oxide surfaces, which was evidenced by the total reflectance Fourier transform infrared (ATR-FTIR) results. The X-ray photoelectron spectroscopy (XPS) data indicated that the reaction of Se(VI) on δ-MnO2 produced Mn(III) as the main product. These results contribute to a deeper understanding of the interface chemical process of Se(IV) with δ-MnO2 in the environment.

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