Abstract
Polarization curves of electroreduction of nitrate anions in sulfuric acid aqueous solutions on a Pd/Pd palladium electrode with the opposite side kept at different constant potentials in the region of Pd–H α-phase formation are compared. The reduction rate of nitrate anions is shown to be substantially higher on a membrane electrode, provided the conditions of hydrogen supply from the membrane's opposite side to the reaction zone are realized. This phenomenon is caused by the reduction of a chemisorbed intermediate (a certain N(III) form) by hydrogen diffused through the membrane. It is shown that the measurements of hydrogen diffusion currents through a membrane can be used in plotting hydrogen sorption isotherms in the Pd–H α-phase.
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Petrii, O.A., Akbaeva, Y.A., Safonova, T.Y. et al. Intensification of the Nitrate Anion Reduction on a Membrane Palladium Electrode. Russian Journal of Electrochemistry 38, 220–223 (2002). https://doi.org/10.1023/A:1016884718990
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DOI: https://doi.org/10.1023/A:1016884718990