Surface potential relaxation rate

We have argued in this chapter that the iSf-LDOS (on which the nuclear spin-lattice relaxation rate of metals depends) is a useful concept to discuss variations in surface reactivity, bonding, and electrode potential effects among a series of related catalysts, in heterogeneous as well as in electrochemical catalysis. The f-LDOS is a... 

Chief among the interfacial properties of aqueous systems that suggest the occurrence of thermal anomalies are the following index of refraction, density, activation energy for ionic conductance, rates of surface reactions, surface tension, surface potentials, membrane potentials, heats of immersion, zeta potentials, rate of nucleation, viscous flow, ion activities, proton spin lattice relaxation times, optical rotation, ultrasonic velocity and absorption, sedimentation rates, coagulation rates, and dielectric properties. 

A. Response of the Open-Circuit Electrode Potential to a Change in the Interfacial Temperature in the Presence of a Perfectly Reversible Redox Couple Attached to the Electrode Surface 121 The Relaxation of the ILIT Response When the Rate of Electron Transfer Is Not Infinitely Fast 126 When Is the ILIT Response Purely Thermal (i.e., Devoid of Kinetic Information) 126 The Shape of the Ideal ILIT Perturbation 130 Nonidealities of the Shape of the ILIT Perturbation and Response—Extracting the Relaxation Rate Constant, 134... 

Our recent electronic structure calculations 3deld a potential energy surface adequate to explain, at least qualitatively and within the uncertainties due to an incomplete knowledge of relaxation rates, the available experimental observations for the hydrogen-iodine reaction. The rate expressions, the rate constants, their temperature dependence, the vibrational excitation of HI products, the excitation and/or dissociation of reactant I2, the photochemical rates - all are compatible with the recent ab initio potential energy surface and with the classical trajectory calculations carried out with a similar surface. And all are compatible with either the bimolecular or termolecular mechanisms. It appears most likely that both mechanisms contribute, but the matter is not resolved as yet. 

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