| 摘要 |
1468610 Electrocatalysts ROBERT BOSCH GmbH 24 May 1974 [25 May 1973] 23254/74 Heading B1E [Also in Division H1] Catalysts comprise a metal (Me) chelate of 5, 14-dihydrodibenzo-5, 19, 14, 18-tetra-aza (14) annulene which has been activated by tempering under an inert gas at a temperature of at least 400‹C. Carbon may be added before or after tempering and Me may be Fe, Co, Ni or Cu. For use in fuel electrodes the preferred tempering temperature is 400 - 500‹C and for use in oxygen electrodes it is 600-1000‹C. In examples catalysts are made by (1) tempering the Co-chelate (CoTAA) at 420‹ and mixing with acetylene black and (2) tempering a mixture of CoTAA and activated charcoal at 420‹C and then at 800‹C, mixing with PTFE and coating onto a porous sheet of PTFE. |
