The role of lattice and adsorbed oxygen in the oxidation of n-butene-1 and furan with MnMoO4-based catalysts

1976 ◽  
Vol 4 (1) ◽  
pp. 19-24 ◽  
Author(s):  
S. Veleva ◽  
F. Trifirò
Keyword(s):  
Adsorbed Oxygen

scholarly journals Elucidating the important role of surface-adsorbed oxygen for improving the sensing of formaldehyde by ZnO nanostructures

2021 ◽  
Author(s):  
Sherif Abdulkader Tawfik ◽  
Hang Tran ◽  
Michelle Jeanette Sapountzis Spencer
Keyword(s):  
Surface Defects ◽  
Health And Safety ◽  
Adsorbed Oxygen ◽  
Zno Nanostructures ◽  
High Importance ◽  
Surrounding Environment ◽  
Pollutant Gases ◽  
Effect Of Surface

Detection of pollutant gases, such as formaldehyde (HCHO), in our homes and surrounding environment is of high importance for our health and safety. The effect of surface defects and specifically...

Near-band-edge photoluminescence from ZnO film: Negative thermal quenching and role of adsorbed oxygen

2014 ◽  
Vol 64 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Vadim Sh. Yalishev ◽  
Shavkat U. Yuldashev ◽  
Khusan T. Igamberdiev ◽  
Tae Won Kang ◽  
Bae Ho Park
Keyword(s):  
Thermal Quenching ◽  
Band Edge ◽  
Adsorbed Oxygen ◽  
Near Band Edge ◽  
Zno Film

scholarly journals NANOSTRUCTURAL PROCESSES OF MELTING AND MOULDING OF CAST IRON WITH GLOBULAR GRAPHITE

2017 ◽  
pp. 45-48
Author(s):  
E. I. Marukovich ◽  
V. Yu. Stetsenko
Keyword(s):  
Cast Iron ◽  
Adsorbed Oxygen ◽  
Globular Graphite ◽  
Physical And Chemical

It is shown that melting and molding of cast iron with globular graphite are complex physical and chemical nanostructural processes. The major role in these processes is played by the centers of crystallization of dendrites of graphite, graphite nanocrystals, the dissolved and adsorbed oxygen. The role of the modifying ligature of FeSiMg is reduced generally to essential decrease of concentration of the adsorbed oxygen and an enrichment of fusion by the centers of crystallization of graphite dendrites. 

Effects of Surface Layer Defects and Adsorbed Oxygen on TiO2-Rutile Schottky Barriers

1981 ◽  
Vol 5 ◽  
Author(s):  
M. Levinson
Keyword(s):  
Surface Defects ◽  
Schottky Barriers ◽  
Adsorbed Oxygen ◽  
Crystal Surfaces ◽  
Single Crystal Surfaces ◽  
Surface Conditions ◽  
Ohmic Behavior ◽  
Al Metallization ◽  
Tio2 Rutile

ABSTRACTThe electronic properties of TiO2 surfaces are of interest to further understanding of grain boundary effects in TiO2 and ZnO based varistor devices. Schottky barriers have been fabricated by Au or Al metallization on Nb doped TiO2-rutile [001] single crystal surfaces. Surface conditions included the presence or absence of either mechanical polishing induced surface defects and/or adsorbed oxygen. I­V measurements on Au samples indicate that surface defects yield ohmic behavior, but the defects may be electrically compensated by adsorbed oxygen to give non-ohmic I­V curves. All Al junctions show ohmic behavior which is interpreted in terms of reaction with surface oxygen. These results explain the necessity of firing varistor materials in an oxidizing atmosphere and suggest that the role of additives in these materials is to stabilize the oxygen concentration at the grain boundaries.

Role of Cryptomelane in Surface-Adsorbed Oxygen and Mn Chemical Valence in MnOx during the Catalytic Oxidation of Toluene

2019 ◽  
Vol 123 (28) ◽  
pp. 17255-17264 ◽  
Author(s):  
Xuejun Zhang ◽  
Zi’ang Ma ◽  
Zhongxian Song ◽  
Heng Zhao ◽  
Wei Liu ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Adsorbed Oxygen

scholarly journals Electrochemical operational principles and analytical performance of Pd-based amperometric nanobiosensors

The Analyst ◽  
2021 ◽  
Author(s):  
Y. E. Silina ◽  
N. Apushkinskaya ◽  
N. V. Talagaeva ◽  
M. G. Levchenko ◽  
E. V. Zolotukhina
Keyword(s):  
Analytical Performance ◽  
Adsorbed Oxygen ◽  
Surface Oxides ◽  
Palladium Surface

The role of palladium surface oxides and adsorbed oxygen in the analytical performance of Pd-NPs-based nanobiosensors is ascertained.

scholarly journals ALUMINIUM BRONZE. NANOSTRUCTURAL PROCESSES OF MELTING AND MOULDING

2018 ◽  
pp. 12-15
Author(s):  
E. I. Marukovich ◽  
V. Yu. Stetsenko
Keyword(s):  
Dissolved Oxygen ◽  
Chemical Processes ◽  
Adsorbed Oxygen ◽  
Aluminum Bronze ◽  
Aluminium Bronze ◽  
Physical And Chemical

It is shown that melting and molding of aluminum bronze are difficult physical and chemical processes. In them the major role is played by the centers of crystallization of dendrites of a a-phase, the a-phase nanocrystals dissolved and the adsorbed oxygen and hydrogen. The role of the modifying crystals of an intermetallid of ZrAl3 is reduced to reduction of concentration of the dissolved oxygen and hydrogen and an intensifi ation of process of coagulation of nanocrystals of a a-phase in the centers of crystallization of dendrites of a a-phase.

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