Combined in situ SPM and EIS studies of Pb UPD on Ag(111) and Ag(100)

Sackmann, J.; Bunk, A.; Pötzschke, R.T.; Staikov, G.; Lorenz, W.J.

doi:10.1016/s0013-4686(98)00027-9

Cited by 30 publications

(16 citation statements)

References 10 publications

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“…The presence of reversible adsorption/desorption peak pairs in Ag NWs indicates a stepwise formation of the UPD Pb overlayer, probably arising from the wire-like morphology. 24,25 Assuming that the theoretical adsorption charge of a Pb monolayer on silver is 260 mC cm À2 , the corresponding ECSA is 5.14 m 2 g À1 , which is comparable with the result reported elsewhere. 6,17,26 The electrocatalytic activity of Ag NWs was then characterized by CV in a N 2 -satured 0.1 M KOH.…”

Section: Resultssupporting

confidence: 88%

A high-performance supportless silver nanowire catalyst for anion exchange membrane fuel cells

Zeng

Zhao

2015

J. Mater. Chem. A

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Section: Resultssupporting

confidence: 88%

A high-performance supportless silver nanowire catalyst for anion exchange membrane fuel cells

Zeng

Zhao

2015

J. Mater. Chem. A

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“…Formation of a compact Ag layer at more negative potentials decreases the apparent rate coefficient due to the coverage related factor f a (θ) which becomes dominating. Additional contribution to the variation of the k a f a (θ) comes from different UPD kinetics at steps, kinks, Au terraces, and also point defects which appear as a result of surface alloying, as was demonstrated in ref for Pb UPD on Ag(111) and Ag(100).…”

Section: Resultsmentioning

confidence: 79%

Simultaneous Acquisition of Impedance and Gravimetric Data in a Cyclic Potential Scan for the Characterization of Nonstationary Electrode/Electrolyte Interfaces

et al. 2011

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Simultaneous acquisition of electrochemical impedance spectroscopy and quartz crystal microbalance (EIS-EQCM) data in cyclic electrode potential scans was used to characterize nonstationary underpotential deposition (UPD) of atomic layers of Ag on Au and Cu on Pt. Both EIS and EQCM data sets complemented each other in the elucidation of interface models and the investigation of different aspects of the interfacial dynamics. EIS-EQCM provided an opportunity to monitor coadsorption and competitive adsorption of anions during the Ag and Cu UPD using (i) the electrode mass change, (ii) adsorption capacitances, and (iii) double-layer capacitances. Kinetic information is available in the EIS-EQCM through the charge transfer resistances and apparent rate coefficients. The latter expresses the rate of UPD into the partially covered electrode surface. The apparent rate coefficients for the Ag UPD were determined to vary from 0.15 to 0.45 cm/s which is between the standard constant rates k 0 of Ag bulk deposition on Ag reported previously for different Ag surfaces. Cu UPD on Pt and Ag UPD on Au contributed differently into a resonance resistance ΔR(E) available from the EQCM data sets. Spontaneous surface alloying between Ag and Au during the Ag UPD continuously increased the ΔR, while the Cu overlayer formation on Pt as well as experiments without Ag þ and Cu 2þ in the solution did not change this parameter significantly. The EIS-EQCM appeared to be a promising tool for an improved characterization and understanding of nonstationary electrochemical interfaces.

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“…By far, the most studied UPD system on silver single crystals has been lead deposition. This process has been studied by a wide variety of techniques including electrochemical, ,− optical reflectivity, SHG, STM, ,,− X-ray absorption spectroscopy, X-ray scattering, − and UHV techniques such as low-energy electron diffraction and Auger electron spectroscopy. ,, Theoretical models of lead deposition on silver single crystals have also been proposed and studied. − …”

Section: Upd On Silver Surfacesmentioning

confidence: 99%

Underpotential Deposition at Single Crystal Surfaces of Au, Pt, Ag and Other Materials

2001

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Enrique Herrero was born in Salamanca, Spain, in 1967. He received his B.S. in Chemistry from the University of Alicante (Spain) in 1990. His graduate thesis dealt with the oxidation of methanol, formic acid, and CO on platinum single crystals and was completed in 1995 at the University of Alicante under the direction of Prof. Juan M. Feliu. During this time he spent one year working with Prof. Andrzej Wieckowski at the University of Illinois at Urbana-Champaign. In 1996 he went on to a postdoctoral appointment in the group of Prof. He ´ctor D. Abrun ˜a in the Chemistry Department at Cornell University, where he worked on metal deposition on single crystals. He is currently an assistant professor at the University of Alicante. Lisa Buller received a B.S. in Chemistry from the University of WisconsinsMadison in 1992. She obtained a Ph.D. in Chemistry from Cornell University in 1997 under the direction of Prof. H. D. Abrun ˜a. Her thesis work dealt with electrochemical and X-ray studies of metal deposition onto single crystals. She is currently an assistant professor at the University of WisconsinsPlatteville.

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Combined in situ SPM and EIS studies of Pb UPD on Ag(111) and Ag(100)

Cited by 30 publications

References 10 publications

A high-performance supportless silver nanowire catalyst for anion exchange membrane fuel cells

A high-performance supportless silver nanowire catalyst for anion exchange membrane fuel cells

Simultaneous Acquisition of Impedance and Gravimetric Data in a Cyclic Potential Scan for the Characterization of Nonstationary Electrode/Electrolyte Interfaces

Underpotential Deposition at Single Crystal Surfaces of Au, Pt, Ag and Other Materials

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