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Titolo:
IN-SITU AND REAL-TIME X-RAY-DIFFRACTION STUDY OF AN ELECTROCRYSTALLIZATION PROCESS - AG ELECTRODEPOSITION ON AU(111)
Autore:
CHABALA ED; RAYMENT T;
Indirizzi:
UNIV CAMBRIDGE,DEPT CHEM,LENSFIELD RD CAMBRIDGE CB2 1EW ENGLAND
Titolo Testata:
Journal of the Chemical Society. Faraday transactions
fascicolo: 7, volume: 92, anno: 1996,
pagine: 1277 - 1280
SICI:
0956-5000(1996)92:7<1277:IARXSO>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
E.D. Chabala e T. Rayment, "IN-SITU AND REAL-TIME X-RAY-DIFFRACTION STUDY OF AN ELECTROCRYSTALLIZATION PROCESS - AG ELECTRODEPOSITION ON AU(111)", Journal of the Chemical Society. Faraday transactions, 92(7), 1996, pp. 1277-1280

Abstract

The electrolytic crystal growth of Ag on Au(lll) under a combination of potential step and linear sweep voltammetry has been studied in situ and in real time with X-ray diffraction. The electrodeposition of Agon Au(lll) was an ideal system to study because the two elements havevery similar lattice constants (a = 4.09 and 4.08 Angstrom for Ag andAu, respectively) and hence epitaxial growth of Ag layers on Au(lll) was expected. In terms of X-ray diffraction studies, the growth of an Ag ad-lattice on Au(lll) led to constructive interference upon X-rays diffracted by the latter. Therefore, the differential diffracted intensity monitored at 2 theta = 38.18 degrees, as a function of time during electrodeposition, increased with the growth of the ad-lattice (electrodeposit). We have demonstrated how the rate of increase of the differential diffraction intensity was affected by the overpotential valuestepped to, the potential sweep rate and the measurement time resolution. We conclude that under very well controlled conditions, these measurements could be used as a way of determining the rate and mode of electrolytic crystal growth.

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Documento generato il 05/12/20 alle ore 01:46:15