Site-Characteristic Electrochemistry

An interesting but relatively unexplored aspect is the existence of site-characteristic electrochemical responses in porous materials containing electroactive centers. As far as the electrochemical processes involve an interfacial electron transfer between the electroactive species and the electrode surface, it is reasonable to expect that the kinetics of that electron transfer should be conditioned by the 

FIGURE 6.16 Schematic representation of the pore structure of cordierites. 

Structural arrangement of the electroactive center, thus resulting in discernible electrochemical responses. In addition, the electrochemical response could also be influenced by the crystallinity, porosity, and distribution of electroactive centers in the porous material. In the following, these types of effects will be termed me so structural effects. 

FIGURE 6.17 Cyclic voltammograms for (a) cobalt-, and (b) nickel-glass cordierites attached to paraffin-impregnated graphite electrodes immersed into 1 M HCl. Potential scan rate 20 mV/sec. Materials courtesy of Prof. Javier Alarcon, University of Valencia. 

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We have rendered down the requirements for functional interaction of any molecule with the RC site. Molecules engineered with a single hydrogen bonding substituent and in vitro electrochemistry in a prescribed range are able to support the electron transfer reactions characteristic of the site. Nevertheless, it is the case that for... 

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