Initial stage of underpotential deposition of Pb on reconstructed and unreconstructed Au(111)

Tao, Nongjian; Pan, Jinbo; Li, Y.; Oden, P. I.; DeRose, James; Lindsay, Stuart

doi:10.1016/0039-6028(92)90855-z

Cited by 85 publications

(75 citation statements)

References 22 publications

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“…The shape of CV in general and the positions of the UPD peaks in particular of metal electrodes are known to be very sensitive to the surface structure and order. [7][8][9][10][11] After the deposition of palladium in 50 mM H 2 SO 4 solution containing 0.01 mM PdCl 4 2-at 0.7 V for 30 min (ca. 2 ML), the electrode was rinsed with milli-Q water.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, in situ techniques for surface characterization in an electrolyte solution such as STM, 1 atomic force microscopy (AFM), [1][2][3] EQCM, 4 and surface X-ray scattering (SXS) 5,6 were applied for the investigation of the electrochemical deposition process. Although many reports are available for in situ observation of so-called underpotentially deposited (UPD) metal layers such as copper, 7 silver, 8 lead, 9 bismuth, 10 and tellurium, 11 the investigation of the electrochemical deposition process with atomic resolution is rather limited and only limited evidence has been provided for the adsorption of the reactant, [12][13][14][15] i.e., metal ions, on the electrode surface during the electrochemical deposition.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Layer-by-Layer Growth of Palladium on an Au(111) Electrode Surface: Evidence for Important Role of Adsorbed Pd Complex

1998

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The adsorption and electrochemical reduction of the tetrachloropalladate complex, PdCl 4 2-, on an Au(111) electrode in H 2 SO 4 solution containing PdCl 4 2-was investigated using an electrochemical quartz crystal microbalance (EQCM) and in situ electrochemical scanning tunneling microscopy (STM). The adlayer of PdCl 4 2-with a ( 7 × 7)R19.1°structure on the Au(111) substrate was observed by in situ STM measurement, and the amount of adsorbed PdCl 4 2-determined by the EQCM measurement was in good agreement with that estimated from this adlayer structure. In situ STM observation showed also that the electrochemical deposition of palladium proceeded with an epitaxial layer-by-layer growth mode and the PdCl 4 2-complex adsorbed on the deposited palladium layer with the same adlayer structure. The adsorption of the PdCl 4 2-complex seemed to play an important role for the layer-by-layer growth of palladium in a large area, since it inhibits the vertical but favors the lateral growth of the palladium layer. The formation of the Pd(111) bulk phase and the surface structure of Pd(111) was confirmed by X-ray diffraction (XRD) and the underpotential deposition of copper, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrochemical Layer-by-Layer Growth of Palladium on an Au(111) Electrode Surface: Evidence for Important Role of Adsorbed Pd Complex

1998

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“…It is particularly interesting to investigate the surface structure of the electrode during metal deposition when metal complexes are used as a reactant. Although many reports are available for the in situ observation of so-called underpotentially deposited (UPD) metal layers such as copper, [1][2][3][4] silver, 5-9 and lead, 10 the investigation of the electrochemical deposition process on an atomic level is rather limited and no evidence has been given for the adsorption of the reactant, i.e., metal ions, on the electrode surface during the electrochemical deposition.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Epitaxial Growth of a Pt(111) Phase on an Au(111) Electrode

et al. 1997

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The electrochemical deposition of platinum on an Au(111) single-crystal electrode in acidic solutions containing H 2 PtCl 6 was studied using an electrochemical scanning tunneling microscope (STM) and electrochemical quartz crystal microbalance (EQCM). The STM investigation showed an ordered adlayer of PtCl 6 2-on the electrode surface during the electrochemical deposition of platinum and a Pt(111)-(1×1) structure on the electrode surface after the electrode was rinsed with a Pt complex-free solution. Formations of the Pt(111) bulk phase and surface structure of Pt (111)- (1×1) were confirmed by X-ray diffraction (XRD) and the underpotential deposition of copper and hydrogen, respectively.

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“…Tao et al 27 found evidence, using electrochemical scanning tunelling microscopy (ECSTM), for a two-step deposition process correlated to the double peak found in the cyclic voltammogram. This two-step adsorption process was also seen by Schmidt and Wuthrich 28 using ECSTM.…”

Section: Discussionmentioning

confidence: 96%

Lead underpotential deposition on Au(110)

Hale

Thurgate

Wilkie

2003

Surface & Interface Analysis

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The electrochemical underpotential deposition (UPD) of lead on Au(110) was investigated by XPS using a custom-built ultrahigh vacuum apparatus containing a chamber for electrochemical studies. A two-step deposition process for lead UPD was confirmed. A large increase in the surface concentration of oxygen was found in solutions containing lead. The presence of lead was detected on the gold surface at all potentials within the range investigated (−500 mV to 1500 mV vs. Ag/AgCl). Degradation of chlorine by x-rays was observed. The change in surface components with potential was investigated and linked to models of UPD and oxidation. The initial random deposition of lead from solution led to surface disordering.

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Initial stage of underpotential deposition of Pb on reconstructed and unreconstructed Au(111)

Cited by 85 publications

References 22 publications

Electrochemical Layer-by-Layer Growth of Palladium on an Au(111) Electrode Surface: Evidence for Important Role of Adsorbed Pd Complex

Electrochemical Layer-by-Layer Growth of Palladium on an Au(111) Electrode Surface: Evidence for Important Role of Adsorbed Pd Complex

Electrochemical Epitaxial Growth of a Pt(111) Phase on an Au(111) Electrode

Lead underpotential deposition on Au(110)

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