Platinized activated carbon electrode

O2 also can be detected by cyt c-modified electrode [214], When cyt c was covalently attached to the modified electrode, the immobilized cyt c was used as an integral part of an amperometric O2 sensor. Superoxide generated by xanthine/XOD caused the one-electron reduction of cytochrome c to cytochrome c. The reduced protein was then reoxidized at the electrode surface. McNeil used this immobilization procedure to detect O2 production by stimulated human neutrophils [215]. The neutrophils that stimulated with phorbol-12 myristate-13 acetate (PMA) produced current changes that were cell number dependent. Fabian [216] used a platinized activated carbon electrode (PACE) to... 

Commercial catalytic hydrogenations of unsaturated compounds use Raney nickel or—less commonly—Pt catalyst supported on active carbon. Electrocatalytic hydrogenation can be performed at platinized platinum or other platinum-metal electrodes. Adsorbed hydrogen atoms are the active reactant in catalytic as well as in electrocatalytic hydrogenation. 

S.P. Chen, S.G. Sun, T.S. Huang, Structure and electrocatalytic activity of electrode of platinized platinum supported on glassy carbon. Chinese Sci. Bull. 1995, 40(5), 377-381. 

A considerable decrease in platinum consumption without performance loss was attained when a certain amount (30 to 40% by mass) of the proton-conducting polymer was introduced into the catalytically active layer of the electrode. To this end a mixture of platinized carbon black and a solution of (low-equivalent-weight ionomeric ) Nafion is homogenized by ultrasonic treatment, applied to the diffusion layer, and freed of its solvent by exposure to a temperature of about 100°C. The part of the catalyst s surface area that is in contact with the electrolyte (which in the case of solid electrolytes is always quite small) increases considerably, due to the ionomer present in the active layer. 

As shown in Fig. 5 7(b) the solid polymer electrolyte cell comprises a membrane, fuel cell type, porous electrodes and three further components z carbon collector, a platinized titanium anode support and a cathode support made from carbon-fibre paper The collector is moulded in graphite with a fluorocarbon polymer binder A 25 pm thick platinized titanium foil is moulded to the anode side to prevent oxidation. The purpose of the collector is to bnsure even fluid distribution over the active electrode area, to act as the main structural component of the cell, to provide sealing of fluid ports and the reactor and to carry current from one cell to the next E>emineralized water is carried across the cell via a number of channels moulded into the collector These channels terminate in recessed manifold areas each of which is fed from six drilled ports. The anode support is a porous conducting sheet of platinized titanium having a thickness of approximately 250 pm. The purpose of the support is to distribute current and fluid uniformly over the active electrode area. It also prevents masking of those parts of the electrode area which would be covered by the... 

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