Abstract: Novel methods of indirect electrochemistry are provided. The methods use ionomer coated electrodes for regeneration of the redox reagent in the indirect electrochemical process. The electrode may be either directly coated with a thin ionomer coating, or alternatively may electrodeposited within an ionomer coated electronically conductive substrate. Ionomers used to coat the electrodes of the subject method include Nafion.RTM. and Tosflex.RTM..

Abstract: Formaldehyde and/or methylal are made by the electrooxidation of methanol in an apparatus which is divided into the anode compartment and the cathode compartment by a cationic membrane made of a fluoropolymer and having pendant fluorosulfonyl or sulfonic acid groups, which is coated on one side with platinum applied by the impregnation-reduction method, said coating serving as the anode. The cathode may be a metal layer on the opposite side of the membrane or a separate metal cathode. When the separate metal cathode is employed, the cathode compartment contains a liquid electrolyte, which is a concentrated inorganic acid, preferably phosphoric acid. Within specifically identified temperature ranges, the yield of formaldehyde and of methylal can be optimized by controlling the mole fraction or partial pressure of methanol feed.

Abstract: Disclosed is a process for fabricating a thin, porous, electronically conductive, high-surface area film proximate the surface of a solid polymer electrolyte membrane. The film has highly desirable characteristics as a surface electrode. Films may be formed on both sides of the membrane to form a bi-polar structure useful in various processes, including chloralkali processes.