This work was supported by the Bundesministerium für Forschung und Technologie and the Deutsche Forschungsgemeinschaft.
Electron/proton transfer reactions and superconductivity: The role of hydrogen in lanthanum copper oxide†
Article first published online: 15 SEP 2004
Copyright © 1991 Verlag GmbH & Co. KGaA, Weinheim
Volume 3, Issue 9, pages 438–440, September 1991
How to Cite
Rudolf, P., Paulus, W. and Schölhorn, R. (1991), Electron/proton transfer reactions and superconductivity: The role of hydrogen in lanthanum copper oxide. Adv. Mater., 3: 438–440. doi: 10.1002/adma.19910030907
- Issue published online: 15 SEP 2004
- Article first published online: 15 SEP 2004
- Manuscript Revised: 16 MAY 1991
- Manuscript Received: 14 MAR 1991
Communication: Is lanthanum copper oxide really lanthanum copper oxide? Evidence is presented showing that the conventionally prepared semiconductor La2CuO4, which has been the starting material in many studies of the high-Tc superconducting copper oxides, is in fact a nonstoichiometric oxide hydroxide (La1.95CuO3.86(OH)0.14). It is also shown that the conversion of the semiconducting phase to the superconducting phase by anodic oxidation does not proceed via the insertion of oxygen into the La2CuO4 but rather over an electron/proton transfer process.