Redox behaviour of copper(II) ion pairs as surface species on CuTh oxide catalysts. Electron paramagnetic resonance and X-ray photoelectron spectroscopy study

1991 ◽  
Vol 87 (4) ◽  
pp. 631-636 ◽  
Author(s):  
Antoine Abou Kaïs ◽  
Rafeh Bechara ◽  
Denise Ghoussoub ◽  
Cossi Faustin Aïssi ◽  
Michel Guelton ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Photoelectron Spectroscopy ◽  
Ion Pairs ◽  
Oxide Catalysts ◽  
Spectroscopy Study ◽  
Surface Species ◽  
Paramagnetic Resonance ◽  
X Ray ◽  
Redox Behaviour ◽  
Electron Paramagnetic

Sequestered carbon on clay mineral probed by electron paramagnetic resonance and X-ray photoelectron spectroscopy

2006 ◽  
Vol 295 (1) ◽  
pp. 135-140 ◽  
Author(s):  
Kátia Cylene Lombardi ◽  
Antonio Salvio Mangrich ◽  
Fernando Wypych ◽  
Ubirajara Pereira Rodrigues-Filho ◽  
José L. Guimarães ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Clay Mineral ◽  
Photoelectron Spectroscopy ◽  
Paramagnetic Resonance ◽  
X Ray ◽  
Electron Paramagnetic

Redox behaviour of copper(II) species on CuCe oxide catalysts: electron paramagnetic resonance (EPR) study

1996 ◽  
Vol 115 ◽  
pp. 171-177 ◽  
Author(s):  
Antoine Aboukaïs ◽  
Abdelrhani Bennani ◽  
Carole Lamonier-Dulongpont ◽  
Edmond Abi-Aad ◽  
Geneviève Wrobel
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Oxide Catalysts ◽  
Paramagnetic Resonance ◽  
Redox Behaviour ◽  
Electron Paramagnetic

Jellyfish-like few-layer graphene nanoflakes: high paramagnetic response alongside increased interlayer interaction

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Alexander Ulyanov ◽  
Dmitrii Stolbov ◽  
Serguei Savilov
Keyword(s):  
Photoelectron Spectroscopy ◽  
High Sensitivity ◽  
Paramagnetic Centers ◽  
Interlayer Interaction ◽  
Paramagnetic Resonance ◽  
X Ray ◽  
Graphene Nanoflakes ◽  
Few Layer Graphene ◽  
Electron Paramagnetic ◽  
Hydrocarbon Pyrolysis

Abstract Jellyfish-like graphene nanoflakes (GNF), prepared by hydrocarbon pyrolysis, are studied with electron paramagnetic resonance (EPR) method. The results are supported by X-ray photoelectron spectroscopy (XPS) data. Oxidized (GNFox) and N-doped oxidized (N-GNFox) flakes exhibit an extremely high EPR response associated with a large interlayer interaction which is caused by the structure of nanoflakes and layer edges reached by oxygen. The GNFox and N-GNFox provide the localized and mobile paramagnetic centers which are silent in the pristine (GNF p ) and N-doped (N-GNF) samples. The change in the relative intensity of the line corresponding to delocalized electrons is parallel with the number of radicals in the quaternary N-group. The environment of localized and mobile electrons is different. The results can be important in GNF synthesis and for explanation of their features in applications, especially, in devices with high sensitivity to weak electromagnetic field.

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