Solvent friction mechanism of an elementary charge-transfer step and cation-regulated preequilibrium for a Pt/Fe(CN)6 4-/3- electrode process
Article Abstract:
The dependence of the heterogeneous rate constant of the Pt/hexacyanoferrate(II/III) electrode process on the solution viscosity was investigated using different concentrations of two representative electrolytes, KCl and LiCl. Findings showed an almost perfect inverse proportional character of the viscosity dependence for the apparent standard rate constant at the representative electrode process. Viscosity-controlled slow relaxational motion to the specifically solvating water was made possible with the direct involvement of quasidiffusional reactant motion.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Electrochemical and spectroscopic studies of hydroxide adsorption at the Au(111) electrode
Article Abstract:
The energetics of OH-adsorption at the Au(111) electrode surface are investigated using chronocoulometry and a thermodynamic analysis of the charge density data. Subtractively normalized interfacial Fourier transform infrared measurements (super 14-16) was also used to obtain additional information concerning OH- properties at the gold surface. The results indicated that hydroxide adsorption on the Au(111) surface commences at -0.4 V/SCE. OH- has a three-state character as revealed by the surface concentration plot.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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Impact of porous electrode properties on the electrochemical transfer coefficient
Article Abstract:
Study was conducted to understand the factors responsible for anomalously high Tafel slopes with a specific focus on the oxygen reduction reaction (ORR) under both low- and high-temperature fuel cell conditions. A standard porous electrode model was used, showing that variables such as the exchange current, pore radius, pore length and electrode or electrolyte conductivity are the key factors in giving low alpha values, especially as the overpotential/currents are increased.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
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