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Titolo:
Tribochemical modification of the microstructure of V2O5
Autore:
Su, DS; Roddatis, V; Willinger, M; Weinberg, G; Kitzelmann, E; Schlogl, R; Knozinger, H;
Indirizzi:
Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany Max Planck Gesell Berlin Germany D-14195 r Inst, D-14195 Berlin, Germany Univ Munich, Dept Chem Phys Chem, D-81377 Munich, Germany Univ Munich Munich Germany D-81377 em Phys Chem, D-81377 Munich, Germany
Titolo Testata:
CATALYSIS LETTERS
fascicolo: 3-4, volume: 74, anno: 2001,
pagine: 169 - 175
SICI:
1011-372X(2001)74:3-4<169:TMOTMO>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
OXIDE SYSTEMS; VANADIUM;
Keywords:
V2O5; tribochemical activation; oxidation state; reduction; defect and surface structure; electron microscopy; electron energy-loss spectroscopy;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
9
Recensione:
Indirizzi per estratti:
Indirizzo: Su, DS Max Planck Gesell, Fritz Haber Inst, Faradayweg 4-6, D-14195 Berlin, Germany Max Planck Gesell Faradayweg 4-6 Berlin Germany D-14195 n, Germany
Citazione:
D.S. Su et al., "Tribochemical modification of the microstructure of V2O5", CATAL LETT, 74(3-4), 2001, pp. 169-175

Abstract

The tribochemical activation of vanadium pentoxide V2O5 is studied by means of X-ray diffraction, electron microscopy and electron energy-loss spectroscopy. The two-stage process can be described as crushing of large crystals into small ones (macroscopic process) followed by amorphisation and reagglomeration of the fragments (microscopic process). No milling equilibrium state can be found. Energy-loss spectra reveal the reduction of vanadium viaoxygen loss. The formation and distribution of V4+ or V3+ species depends on the history of milling.

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Documento generato il 30/09/20 alle ore 08:19:07