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Underpotential deposition of lead on Pt(111) in the presence of bromide: RRDPt(111)E and X-ray scattering studies

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1998
Authors
Marković, NM
Grgur, Branimir
Lucas, CA
Ross, PN
Article (Published version)
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Abstract
The underpotential deposition (upd) of Pb onto Pt(lll) in solution containing Br- was examined by classical RRDP(111)E electrochemical methods in combination with in situ surface X-ray scattering measurements. The results show that Pb upd onto Pt(lll) in the presence of bromide is a competitive process with the total amount of Pb deposited at underpotential being only ca. 0.51 +/- 5% ML, less than the amount needed to form a close-packed monolayer, 0.63 ML (1 ML equals 1 Pb atom per Pt surface atom). Deposition of Pb adatoms is accompanied by desorption of about one-half of the bromide adsorbed on the Pt surface at higher potentials, leaving co-adsorbed bromide both in and on-top-of the adlayer. In the potential region where the ratio of co-adsorbed species is close to one (E approximate to OV) there is the slow formation (over a period of ca. 2h) of an ordered surface alloy, which has a p(2 x 2) unit cell. No other ordered structures of Pb are observed in the underpotential region.
Keywords:
lead / underpotential deposition / Pt(111) / bromine anions / RRDE / surface X-ray scattering
Source:
Journal of Electroanalytical Chemistry, 1998, 448, 2, 183-188
Publisher:
  • Elsevier Science Sa, Lausanne

DOI: 10.1016/S0022-0728(97)00012-0

ISSN: 0022-0728

WoS: 000075475600005

Scopus: 2-s2.0-0032064066
[ Google Scholar ]
8
9
URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/210
Collections
  • Radovi istraživača / Researchers’ publications (TMF)
Institution/Community
Tehnološko-metalurški fakultet
TY  - JOUR
AU  - Marković, NM
AU  - Grgur, Branimir
AU  - Lucas, CA
AU  - Ross, PN
PY  - 1998
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/210
AB  - The underpotential deposition (upd) of Pb onto Pt(lll) in solution containing Br- was examined by classical RRDP(111)E electrochemical methods in combination with in situ surface X-ray scattering measurements. The results show that Pb upd onto Pt(lll) in the presence of bromide is a competitive process with the total amount of Pb deposited at underpotential being only ca. 0.51 +/- 5% ML, less than the amount needed to form a close-packed monolayer, 0.63 ML (1 ML equals 1 Pb atom per Pt surface atom). Deposition of Pb adatoms is accompanied by desorption of about one-half of the bromide adsorbed on the Pt surface at higher potentials, leaving co-adsorbed bromide both in and on-top-of the adlayer. In the potential region where the ratio of co-adsorbed species is close to one (E approximate to OV) there is the slow formation (over a period of ca. 2h) of an ordered surface alloy, which has a p(2 x 2) unit cell. No other ordered structures of Pb are observed in the underpotential region.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Electroanalytical Chemistry
T1  - Underpotential deposition of lead on Pt(111) in the presence of bromide: RRDPt(111)E and X-ray scattering studies
EP  - 188
IS  - 2
SP  - 183
VL  - 448
DO  - 10.1016/S0022-0728(97)00012-0
UR  - conv_1906
ER  - 
@article{
author = "Marković, NM and Grgur, Branimir and Lucas, CA and Ross, PN",
year = "1998",
abstract = "The underpotential deposition (upd) of Pb onto Pt(lll) in solution containing Br- was examined by classical RRDP(111)E electrochemical methods in combination with in situ surface X-ray scattering measurements. The results show that Pb upd onto Pt(lll) in the presence of bromide is a competitive process with the total amount of Pb deposited at underpotential being only ca. 0.51 +/- 5% ML, less than the amount needed to form a close-packed monolayer, 0.63 ML (1 ML equals 1 Pb atom per Pt surface atom). Deposition of Pb adatoms is accompanied by desorption of about one-half of the bromide adsorbed on the Pt surface at higher potentials, leaving co-adsorbed bromide both in and on-top-of the adlayer. In the potential region where the ratio of co-adsorbed species is close to one (E approximate to OV) there is the slow formation (over a period of ca. 2h) of an ordered surface alloy, which has a p(2 x 2) unit cell. No other ordered structures of Pb are observed in the underpotential region.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "Underpotential deposition of lead on Pt(111) in the presence of bromide: RRDPt(111)E and X-ray scattering studies",
pages = "188-183",
number = "2",
volume = "448",
doi = "10.1016/S0022-0728(97)00012-0",
url = "conv_1906"
}
Marković, N., Grgur, B., Lucas, C.,& Ross, P.. (1998). Underpotential deposition of lead on Pt(111) in the presence of bromide: RRDPt(111)E and X-ray scattering studies. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 448(2), 183-188.
https://doi.org/10.1016/S0022-0728(97)00012-0
conv_1906
Marković N, Grgur B, Lucas C, Ross P. Underpotential deposition of lead on Pt(111) in the presence of bromide: RRDPt(111)E and X-ray scattering studies. in Journal of Electroanalytical Chemistry. 1998;448(2):183-188.
doi:10.1016/S0022-0728(97)00012-0
conv_1906 .
Marković, NM, Grgur, Branimir, Lucas, CA, Ross, PN, "Underpotential deposition of lead on Pt(111) in the presence of bromide: RRDPt(111)E and X-ray scattering studies" in Journal of Electroanalytical Chemistry, 448, no. 2 (1998):183-188,
https://doi.org/10.1016/S0022-0728(97)00012-0 .,
conv_1906 .

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