Dehydrogenation System of Formic Acid Combined with Electrochemical Oxidation of Atomic Hydrogen Permeating Through a Palladinized Pd Sheet Electrode

摘要

A two-compartment reactor separated by apalladinized Pd sheet electrode was used in a newdehydrogenation system which was constructed by combiningdehydrogenation of formic acid without dilution at one side ofthe palladinized Pd sheet electrode with electrochemicaloxidation of permeated atomic hydrogen at another side. Theincrease in oxidation current demonstrated that thedehydrogenation system proceeded successfully. From atheoretical analysis of time course of the oxidation current forthe palladinized Pd sheet electrode, the diffusion coefficient ofhydrogen was evaluated, and its Arrhenius plot was drawn fordetermining an activation energy for the diffusion of hydrogen.These values were in good agreement with the previouslyevaluated ones, suggesting that the permeation process of atomichydrogen through the palladinized Pd sheet electrode was rate determining.