Intensification of the nitrate anion reduction on a membrane palladium electrode

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.

Authors
Petrii O.A.1 , Akbaeva Yu.A. 2 , Safonova T.Ya.1 , Kondrasheva V.S. 2 , Kolosov E.N. 2 , Tsirlina G.A.1 , Gryaznov V.M. 2
Number of issue
2
Language
English
Pages
220-223
Status
Published
Volume
38
Year
2002
Organizations
  • 1 Moscow State University, Leninskie gory, Moscow, 119899, Russian Federation
  • 2 Russ. State Peoples' Friendship U., ul. Miklukho-Maklaya 6, Moscow, 117198, Russian Federation
Keywords
hydrogen; nitrate; nitrogen; palladium; proton; sulfuric acid; aqueous solution; article; compartment model; concentration response; diffusion; dry deposition; electric current; electric potential; electrochemical analysis; electrode; electrolysis; gas diffusion; gas transport; ionization; membrane electrode; membrane palladium electrode; membrane permeability; polarization; reduction
Date of creation
19.10.2018
Date of change
19.10.2018
Short link
https://repository.rudn.ru/en/records/article/record/216/