Electrolytes for methanol-air fuel cells. 11. The electro-oxidation of methanol in trifluoromethane-sulphonic acid monohydrate and aqueous solutions of trifluoromethane-sulphonic acid

Autor:	R. B. Jones, Brian D. McNicol, R. T. Short, V. B. Hughes, M. R. Andrew
Rok vydání:	1977
Předmět:	Aqueous solution Chemistry General Chemical Engineering Radical Inorganic chemistry chemistry.chemical_element Electrolyte engineering.material Electrochemistry Sulfur Catalysis chemistry.chemical_compound Materials Chemistry engineering Noble metal Methanol
Zdroj:	Journal of Applied Electrochemistry. 7:161-174
ISSN:	1572-8838 0021-891X
DOI:	10.1007/bf00611039
Popis:	Trifluoromethanesulphonic acid monohydrate CF3SO3H.H2O and its aqueous solutions have been evaluated as an electrolyte for methanol electro-oxidation. The performances of conventional noble metal catalysts in the pure monohydrate are very poor compared with those in 3 M sulphuric acid. This is contrary to previously published literature data, and possible reasons for the discrepancy are given. In aqueous solutions of CF3SO3H at concentrations between 10 and 50%wt. considerably improved performance is obtained and at 60° C the activities of the catalysts are in most cases slightly higher than in 3 M H2SO4. In addition the poisoning effect of acid radicals is considerably less in CF3SO3H than in H2SO4 solutions. Above 60° C, however, the aqueous CF3SO3 anion decomposes to produce sulphur, which poisons the noble metal catalysts.
Databáze:	OpenAIRE
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