Direct electron transfer involving free-solute ferrocene in fluid electrolyte on an oxocuprate (Bi(Pb) 2223) electrode in the superconducting state
- Univ. of Exeter (United Kingdom)
High critical temperatures T{sub c} invite the probing of the electronic spectra of superconducting oxocuprates by electrochemical study of charge transfer at the superconductor/electrolyte interface. Hitherto solid electrolytes or frozen aqueous glasses have been employed, the latter involving irresolvably complex proton reductions or poorly-resolved Fe{sup II/III} processes. Electron transfer affected between a superconducting electrode and free electroactive species in a fluid solution offers a wider choice of systems and more intimate electrode/electrolyte contact. Following experimental advances i-v, we can now report free-solute ferrocene electrochemistry in fluid electrolyte at 102-104 K (i.e., < T{sub c}) on superconducting Bi(Pb) 2223 oxocuprate itself (Pb{sub 0.34}Bi{sub 1.84}Sr{sub 1.91}Ca{sub 2.03}Cu{sub 3.06}O{sub x}), T{sub c} being established as 105 K by four-probe resistivity measurements. 15 refs., 3 figs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 269191
- Journal Information:
- Journal of the American Chemical Society, Vol. 114, Issue 24; Other Information: PBD: 18 Nov 1992
- Country of Publication:
- United States
- Language:
- English
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