Platinized porous plate

Dissolve about i gram of an organic base (brucine, strychnine, quinine, c.) in 10 c.c. of a mixture of equal volumes of concentrated hydrochloric acid and water. To the clear hot solution add excess of platinic chloride and let it cool. Yellow microscopic crystals of the chloroplatinate of the base separate. (If the chloroplatinate of the base is very soluble in water, such as aniline, it must be washed with strong hydrochloiic acid, pressed on a porous plate and dried in a vacuum-desiccator over solid caustic potash.)... 

Experiments were conducted using parallel plate electrodes immersed in O.OOIn KCl at 25°C and exposed to atmospheric oxygen. The porous electrodes, by experimental measurement of and R, were found to have higher effective areas than even platinized platinum electrodes, that is, higher series-measured Cp and lower series-measured R. ... 

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