Quantitative treatment chemisorption

Related to these matters has been the question whether two-component electrode metals (dual-site model) could lead to an electrocatalyst surface that exhibited catalytic properties better than either of its components. Qualitative ideas about electron spillover between one component and another at microcrystal grain boundaries, or transfer of the chemisorbed intermediate from one site to another, could suggest the possibility of such an effect. However, a quantitative theoretical analysis of this question by Parsons (149), based on his treatment of chemisorption effects at single metals (23) having various AG ,, h values, showed that, for practical applications, almost no... 

The distribution of adsorbent grain size must be standardised and air humidity and pH conditions reproducible if remission spectra are to be quantitatively evaluated. Water, for example, partly displaces the adsorbed substance molecules and thereby alters the form of the spectra [373]. Frei and co-workers [201] have investigated the reflectance spectra of some dyes adsorbed on Merck alumina, as a function of its thermal pre-treatment. They tested also the influence of neutral, acid or basic alumina on the form of the spectra. Modifications were observed due to interactions between adsorbed substance and adsorbent (chemisorption). 

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