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Titolo:
IN-SITU PROBING OF THE NEAR-SURFACE PROPERTIES OF HETEROGENEOUS CATALYSTS UNDER REACTION CONDITIONS - AN INTRODUCTION TO TOTAL ELECTRON-YIELD XAS
Autore:
SCHROEDER SLM; MOGGRIDGE GD; RAYMENT T; LAMBERT RM;
Indirizzi:
UNIV CAMBRIDGE,DEPT CHEM,LENSFIELD RD CAMBRIDGE CB2 1EW ENGLAND UNIV CAMBRIDGE,DEPT CHEM CAMBRIDGE CB2 1EW ENGLAND UNIV CAMBRIDGE,DEPT CHEM ENGN CAMBRIDGE CB2 3RA ENGLAND MAX PLANCK GESELL,FRITZ HABER INST,ABT ANORG CHEM D-14195 BERLIN GERMANY
Titolo Testata:
Journal of molecular catalysis. A, Chemical
fascicolo: 1-3, volume: 119, anno: 1997,
pagine: 357 - 365
SICI:
1381-1169(1997)119:1-3<357:IPOTNP>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
X-RAY-ABSORPTION; FINE-STRUCTURE SPECTROSCOPY; EXAFS; DEPTH; SCATTERING;
Keywords:
XAFS; EXAFS; SEXAFS; TOTAL ELECTRON YIELD; IN SITU; PROBING DEPTH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
40
Recensione:
Indirizzi per estratti:
Citazione:
S.L.M. Schroeder et al., "IN-SITU PROBING OF THE NEAR-SURFACE PROPERTIES OF HETEROGENEOUS CATALYSTS UNDER REACTION CONDITIONS - AN INTRODUCTION TO TOTAL ELECTRON-YIELD XAS", Journal of molecular catalysis. A, Chemical, 119(1-3), 1997, pp. 357-365

Abstract

Over the last two years, our understanding of gas-flow total electron-yield (TEY) detection for in situ X-ray absorption spectroscopy (XAS)has rapidly progressed. A short summary of recent developments is presented with a particular view to applications in the field of heterogeneous catalysis. For the first time, true in situ TEY data (of Ni- andCu-based systems) acquired in reactive gas atmospheres and at pressures up to 40 atm are presented. The salient physical principles underlying the formation of the TEY signal are briefly introduced. Previouslyunexplained 'self-absorption' distortions in the TEY signal are explained by photoelectrons excited by fluorescent photons. The possibilities and limitations of in situ TEY XAS studies are highlighted.

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Documento generato il 01/12/20 alle ore 15:24:23