Polymeric phthalocyanine electrocatalyst

Fig. 23. Potential-current curves for some metal ligand electrocatalysts (284) solid lines, porphyrins dashed line, polymeric phthalocyanine.

Polymeric phthalocyanine films prepared from 51a have been investigated as electrocatalysts, in biological applications and as amperometric biosensors [157]. The electropolymerized films exhibited better activities than analogous low molecular weight phthalocyanine films. Some examples are given ... 

The redox electrochemistry of a Fe /Fe couple is easily accomplished on a phthalocyanine-coated electrode with peak separations comparable to that of platinum [141,142,163,164]. Phthalocyanine-coated electrodes are found to be efficient electrocatalysts to catalys catechol, p-benzoquinone and oxalic acid oxidations [120,150]. The electrochemical activity of these electrodes may be due to the high voltage, surface area, high electronic conductivity and redox behaviour of phthalocyanine, vanadium phthalocyanine and other phthalocyanines have been prepared by vapour deposition and show photoelectrochemical responses when dipped in aqueous electrolytes [244-249]. Polymeric phthalocyanines of Co and Fe are coated on active carbon and are shown to give catalytic properties for dioxygen reduction and thiol oxidations. Dioxygen chemisorption and ammonia absorption of metallo... 

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