Electrocatalytic Performances of La0.6Ca0.4CoO3 and Pb2Ru2O6 prepared by Amorphous Citrate Precursor Method

Amorphous Citrate Precursor 법으로 제조한 La0.6Ca0.4CoO3와 Pb2Ru2O6의 전기화학적 촉매능

  • Lee, Churl Kyoung (Mineral & Materials Processing Div., Korea Institute of Geology, Mining & Materials) ;
  • Sohn, Hun-Joon (School of Materials Science & Engineering, Seoul National University)
  • 이철경 (한국자원연구소 활용연구부) ;
  • 손헌준 (서울대학교 재료공학부)
  • Received : 1997.04.18
  • Accepted : 1999.01.30
  • Published : 1999.05.10

Abstract

The transition metal oxides have been of interest as bifunctional electrocatalysts for bifunctional air electrodes. The amorphous citrate precursor (ACP) process has been optimized to prepare perovskite (La0.6Ca0.4CoO3) and pyrochlore (Pb2Ru2O6) powders with high surface area, and consequent improvement of The electrocatalytic performance in an air electrode with thermal treatment. PTFE -bonded gas diffusion electrodes loaded with perovskitc and pyrochlore catalysts showed good bifunctional performances. The electrodes were fairly stable up to 100 hour in the galvanostatic mode at ${\pm}25mA/cm^2$, from which these electrodes offer promise as practical bifunctional air electrodes.

Keywords

Transition Metal Oxide;Air Electrode;Bifunctionalily;Citrate Precursor

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