Admittance studies of the EQCM on rough surfaces. The double layer region

Tsionsky, Vladimir; Katz, Galina; Gileadi, E.; Daikhin, Leonid

doi:10.1016/s0022-0728(02)00716-7

Cited by 20 publications

(13 citation statements)

References 25 publications

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“…For EQCM, coupling between the electrode surface and adjacent electrolyte results in simultaneous alteration of the resonant frequency and dissipative losses. The effect of changes in solvation, hydrogen bonding, and double-layer structure on slippage or viscous coupling have been examined for several systems. − The motional frequency response of the QCM is usually modeled by a series combination of inductance–capacitance–resistance (L–C–R) elements, known as a Butterworth–von Dyke equivalent circuit, where damping losses are captured by the resistance term . During voltammetric cycling of Au in the base NaCl electrolyte, resistance changes are less than one ohm (Figure S3), with a slight drop near −0.6 V SSCE coincident with the proton reduction process.…”

Section: Resultsmentioning

confidence: 99%

Self-Terminated Electrodeposition of Ni, Co, and Fe Ultrathin Films

et al. 2016

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Self-terminated Fe-group metal (Ni, Co, Fe) electrodeposition occurs at potentials negative of the onset of water reduction where OH − generation leads to the formation of a blocking hydroxide monolayer. Quenching of metal deposition is accompanied by an increase in dissipative energy loss in microbalance experiments attributed to increased hydrogen bonding to the adjacent double layer. Pulse deposition at −1.5 V SSCE in 5 mmol/L (NiCl 2 , CoCl 2 , FeSO 4 ) − 0.1 mol/L NaCl pH 3.0 electrolytes yields fully coalesced ultrathin films of Ni, Co, Fe, or alloys thereof, on Au. The film thickness is controlled by the nucleation, growth, and termination dynamics constrained by the electrochemical cell time constant. Precipitation of bulk Ni(OH) 2 and related phases is minimized by using short deposition times and dilute metal cation concentrations to limit supersaturation. The rapid deposition of smooth, compact ultrathin Fe, Co, and Ni films should facilitate mechanistic and durability studies of Fe-group metal catalysis and the fabrication of emerging microdevices.

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Section: Resultsmentioning

confidence: 99%

Self-Terminated Electrodeposition of Ni, Co, and Fe Ultrathin Films

et al. 2016

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“…3, or from the width-at-half-height, W 1/2 , given by Eq. (12) and shown in Fig. 2d and h. Under full diffusion control and in the region of mixed control, the anodic and cathodic scans (starting from h in = 1 and h in = 0, respectively) exhibit a quite different behavior.…”

Section: Determination Of the Value Of The Frumkin Parameter Fmentioning

confidence: 94%

“…The roughness factor is also known to play an important role in the studies of adsorption and the structure of the metal/solution interface, employing the electrochemicalquartz-crystal microbalance [11,12]. In this case the characteristic length relevant to the roughness of the surface is the hydrodynamic velocity-decay length.…”

Section: The Roughness Factormentioning

confidence: 99%

Underpotential dissolution of metals under conditions of partial mass-transport control

Kirowa‐Eisner¹,

Tzur²,

Gileadi³

2008

Journal of Electroanalytical Chemistry

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“…The Sauerbrey equation can be applied for thin rigid deposits if: (i) the deposited layer has a uniform thickness; (ii) if the mechanical impedance of the deposited layers does not differ strongly from that of the quartz crystal. Other factors such as roughness of the electrode, changes in the viscoelasticity of the deposit due to changes in morphology and swelling of the films or surface hydration changes as a function of the applied potential should be taken into account if the deposited films are either rigid-thick or soft [51][52][53][54]. However, Eq.…”

Section: Eqcm Gravimetry and Acoustic Impedance Measurementsmentioning

confidence: 99%

Cation exchange behavior during the redox switching of poly (3,4-ethylenedioxythiophene) films

Gruia

Ispas

Efimov

et al. 2020

J Solid State Electrochem

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Poly (3,4-ethylenedioxythiophene), PEDOT, films were synthesized at room temperature by potentiodynamic and potentiostatic step deposition in aqueous solutions containing EDOT monomer and LiClO4. In some solutions, the effect of small amounts of sodium dodecylsulfate, SDS, on the polymerization rate of EDOT and on the stiffness of the obtained PEDOT film was studied. The obtained PEDOT films were transferred in aqueous solutions containing cations with different molar mass, such as H+, Li+, Na+, K+, and Cs+. The apparent molar masses of the exchanged species during potentiodynamic experiments were determined by in situ microgravimetry. These measurements underlined the importance of the electrolyte chosen for electropolymerization process. It is known that SDS anions can be trapped inside the polymer layer during electropolymerization, providing them with a cation exchange behavior. However, even if the PEDOT films were deposited from an electrolyte without SDS, they still acted as cation exchangers.

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Admittance studies of the EQCM on rough surfaces. The double layer region

Cited by 20 publications

References 25 publications

Self-Terminated Electrodeposition of Ni, Co, and Fe Ultrathin Films

Self-Terminated Electrodeposition of Ni, Co, and Fe Ultrathin Films

Underpotential dissolution of metals under conditions of partial mass-transport control

Cation exchange behavior during the redox switching of poly (3,4-ethylenedioxythiophene) films

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