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Titolo:
Electrochemical quartz crystal microbalance study on cyclic electrodeposition of PbS thin-films
Autore:
Saloniemi, H; Kemell, M; Ritala, M; Leskela, M;
Indirizzi:
Univ Helsinki, Dept Chem, FIN-00014 Helsinki, Finland Univ Helsinki Helsinki Finland FIN-00014 em, FIN-00014 Helsinki, Finland
Titolo Testata:
THIN SOLID FILMS
fascicolo: 1, volume: 386, anno: 2001,
pagine: 32 - 40
SICI:
0040-6090(20010501)386:1<32:EQCMSO>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
LEAD SULFIDE; VOLTAMMETRY; GOLD;
Keywords:
lead sulfide; electrodeposition; electrochemical quartz crystal microbalance;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Leskela, M VTT Elect, POB 1101, FIN-02044 VTT, Finland VTT Elect POB 1101 VTT Finland FIN-02044 IN-02044 VTT, Finland
Citazione:
H. Saloniemi et al., "Electrochemical quartz crystal microbalance study on cyclic electrodeposition of PbS thin-films", THIN SOL FI, 386(1), 2001, pp. 32-40

Abstract

Electrochemical quartz crystal microbalance combined with cyclic voltammetry was used to study the electrodeposition of PbS thin-films on Au surface. The electrodeposition was carried out by cycling between two potentials with voltage scan rates of 0.1 and 0.01 V/s. In addition, the electrochemicalbehaviour of PbS film and the related precursors, PbEDTA(2-) and HS- were studied separately. It was found that the reduction of PbEDTA(2-) occurred at a more positive potential on the PbS surface than on the Au surface. Similarly, HS- oxidised at a more negative potential on the PbS than on the Ausurface. Therefore, the deposition of PbS was proposed to occur by two mechanisms. The first mechanism includes the reduction of PbEDTA(2-) to elemental lead which during the oxidation reacts with HS-. In the other mechanism, PbS surface induces the chemical reaction between PbEDTA(2-) and HS. The electrodeposited PbS is stable in the potential range of -1.2 to -0.2 V vs. Ag/AgCl, (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 19/09/20 alle ore 23:53:14