Infrared spectrum of carbon monoxide adsorbed on a platinum electrode

Abstract

For a potential of different shape the critical value might change as much as 25% and, of course, the diatom potential might be modified in solution. However, these changes surely cannot offset the very small B value, and we may conclude that 3HeT definitely has no bound state. An ionic complex appeared much more likely to be capable of binding 3He, and our calculations confirm that such complexes indeed have appreciable stability.At the storage temperature of 20 K, only a modest enthalpy increase for an He-ionic complex as compared to a neutral He-T2 interaction could account for the observed supersolubility. This can be seen by considering the equilibrium constants for dissolving He in liquid tritium without (unprimed) and with (primed) ionic complexes present: K = [He-neutral] / [He(gas)] K'= [He-ionic] / [He(gas) ] If we assume that the standard entropy change and the (20)

The electrooxidation of chemisorbed CO on polycrystalline platinum A mechanistic interpretation of the anodic current peak multiplicity

“…The present paper deals with a mechanistic interpretation of the anodic current peak multiplicity related to the electrooxidation of CO on polycrystalline platinum in acid electrolytes. Recent electrochemically-modulated IR spectroscopy data on the adsorption of CO on platinum electrodes m H2SO 4 solution support, in principle, the existence of two forms of adsorbed CO [21,22], although for polycrystalline platinum it was assumed that was CO adsorbed in a random manner so that the adsorbed layer would probably show a behaviour which was an average of the behaviour of CO on the different crystal surfaces [23]. The existence of electrochemically-distinguishable adsorption states for CO on polycrystalline platinum may offer the possibdity that position-exchange surface reactions involving the different species occur.…”

One-dimensional CoPt nanorods and their anomalous IR optical properties

“…6a) [38]. The value of the Stark tuning rate is closely correlated with the concentration of electrolyte [31,39,40] and solution molecule [41]. Except for the band of CO L , a positive-going band located near 2341 cm À 1 is ascribed to IR absorption of CO 2 species that are uniquely derived from the oxidation of CO ad at E R , because no CO 2 and CO species presented initially in solution inside the thin layer between the electrode and IR window.…”

Anomalous IR Optical Properties of Monodispersed PtNi Nanoparticles

“…The values of the Stark tuning rate were measured as 6.6 and 10.2 cm -1 •V -1 for the COL bipolar bands, respectively. The value of the Stark tuning rate is closely correlated with the nanostructured materials, 24,26 the concentration of electrolyte, 32 and solution molecule. 33 When the ES is above 0.2 V, the variation of wavenumbers with ES clearly deviated from the linear relationship and decreased slightly.…”