DIRECT ENERGY CONVERSION SYSTEMS. PART 2. ELECTROCATALYTIC ACTIVITY OF HYDRAZINE IN FUEL CELL APPLICATIONS
Abstract
The electrode reactions of hydrazine in acid and basic solutions on smooth and platinised platinum were examined. From analysis of the rest potentials and concentration relationships a rapid one electron exchange with a stable surface species is postulated. The mechanism of oxidation occurs via a sequential system whereby hydrazinium radicals are the products of the initial oxidation. The electrode reactions of carbon monoxide in acid solutions on smooth platinum electrodes were also examined. The carbon monoxide is strongly bound to the metal surface and probably exists as a compound. Suppression of the reversible hydrogen reaction was observed in the presence of CO. Removal of the carbon monoxide film was performed as soon as oxide formation occurred indicating that the carbon monoxide is essentially electroinactive and that the reaction is purely chemical with the metal oxide to form carbon dioxide. Electrochemical regeneration of the metal oxide forms the regenerative cycle. M0 + C0 > M + C02; M + H20 > M0 +2H+ 2e-. The oxidation of methanol in acid does not proceed via carbon monoxide as an intermediate.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1965
- Accession Number
- AD0628529
Entities
People
- Paul D. Stonehart
Organizations
- Stanford University