Electrochemical surface science: past, present and future

Kolb, Dieter M.

doi:10.1007/s10008-011-1396-6

Cited by 29 publications

(18 citation statements)

References 40 publications

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“…16 In order to test whether the XPS-probed region under the thin film electrolyte was under electrochemical potential control, we monitored the change in the local work function, which is equivalent to a change in the electrochemical potential. 17 The work function change can be obtained from the energy shifts of the gas and liquid phase H 2 O peak positions in O 1s spectra. 8 These molecules near the surface have core level ionization energies that are constant with respect to the vacuum level but will appear with a peak shift in XPS when the work function is changed because the XPS binding energy scale is referenced to the Fermi level of the electrode.…”

Section: Operation Of the Thin Film Electrochemical Cellmentioning

confidence: 99%

Ambient-Pressure XPS Study of a Ni–Fe Electrocatalyst for the Oxygen Evolution Reaction

et al. 2016

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Chemical analysis of solid-liquid interfaces under electrochemical conditions has recently become feasible due to the development of new synchrotron radiation techniques. Here we report the use of "tender" X-ray Ambient Pressure X-ray Photoelectron Spectroscopy (APXPS) to characterize a thin film of Ni-Fe oxyhydroxide electrodeposited on Au as the working electrode at different applied potentials in 0.1 M KOH as the electrolyte. Our results show that the asprepared 7 nm thick Ni-Fe (50% Fe) film contains Fe and Ni in both their metallic as well as oxidized states, and undergoes further oxidation when the sample is subjected to electrochemical oxidation-reduction cycles. Metallic Fe is oxidized to Fe 3+ and metallic Ni to Ni 2+/3+ . This work shows that it is possible to monitor the chemical nature of the Ni-Fe catalyst as function of potential when the corresponding current densities are small. This allows for operando measurements just above the onset of OER; however, current densities as they are desired in photoelectrochemical devices (~1-10 mA cm -2 ) could not be achieved in this work, due to ohmic losses in the thin electrolyte film. We use a two-dimensional model to describe-the spatial distribution of the electrochemical potential, current density and pH as a function of the position above the electrolyte meniscus, to provide guidance towards enabling the acquisition of operando APXPS at high current density. The shifts in binding energy of water with applied potential predicted by the model is in good agreement with the experimental values.3

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Section: Operation Of the Thin Film Electrochemical Cellmentioning

confidence: 99%

Ambient-Pressure XPS Study of a Ni–Fe Electrocatalyst for the Oxygen Evolution Reaction

et al. 2016

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“…6,7,10,14,15 The observed organization of IL cations and anions is very much reminiscent of a subset of electrical double layers associated with compact electrode/electrolyte interfaces termed ''Stern layers'', which exhibit significant long-range order arising from strong intermolecular and surface interactions and can create electrostatic potential drops exceeding 10 8 V cm À1 . 3,4,16,17 Yet the gold surface lacks Lewis acid and base sites commonly associated with semiconductor mid-gap states, and by comparison, interactions are relatively weak and confined to within the first 1-2 ML. This system serves as a model reference point to compare the extent of reactivity in each of the four semiconductor/electrolyte interfaces.…”

Section: Introductionmentioning

confidence: 99%

Rationalizing energy level alignment by characterizing Lewis acid/base and ionic interactions at printable semiconductor/ionic liquid interfaces

et al. 2022

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“…The electrochemistry of surfaces is a field in constant evolution [13] and with regard to redox systems, we introduced in 2008, a study of the electrochemical properties of metal nanoparticles [14] at equilibrium. This work presented a generalization of the relationship proposed by Plieth [15] to non-spherical aggregates.…”

Section: Introductionmentioning

confidence: 99%

Displacement of voltammetric peaks with nanoparticles size: a nonextensive thermodynamic approach

Letellier

Turmine

2014

Electrochimica Acta

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We show here that the concepts of nonextensive thermodynamics (NET), described previously (J. Phys. Chem. B, 2004, 108, 18980) and applied to redox behaviour of nanoparticles (J. Phys.Chem. C, 2008, 112, 12116) can be used to express by a power law the variations to the electrochemical kinetics of nanoparticles and in particular to voltammetry. We proposed here a generalization of Plieth's relationship for non-spherical aggregates by assuming that the interface between the particle and its environment is fuzzy. Thus, the relations of non-extensive thermodynamics can quantitatively account for the displacements of electro-oxidation potentials of metal nanoparticles deposited on electrodes, according to their measured size. Our approach also permits to formally justify the stability of the particles may increase as their size decreases, (τ < 0). This is usually found when the aggregates are in close contact with a matrix (in the case, for example, of embedded particles).

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Electrochemical surface science: past, present and future

Cited by 29 publications

References 40 publications

Ambient-Pressure XPS Study of a Ni–Fe Electrocatalyst for the Oxygen Evolution Reaction

Ambient-Pressure XPS Study of a Ni–Fe Electrocatalyst for the Oxygen Evolution Reaction

Rationalizing energy level alignment by characterizing Lewis acid/base and ionic interactions at printable semiconductor/ionic liquid interfaces

Displacement of voltammetric peaks with nanoparticles size: a nonextensive thermodynamic approach

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