| 摘要 |
An electrode, which may be used as a gas electrode, e.g. the oxygen electrode, of a fuel cell, is produced by substantially instantaneously heating a shaped body of carbon to above 650 DEG C., preferably 700-1000 DEG C., quenching the body to below 50 DEG C. in a non-inflammable liquid, and repeating the heating and quenching one or more times. The electrode has an average pore diameter 10-100 , preferably not greater than 40, and an inner surface are 10-50 sq. m./grm. preferably not greater than 30. The fuel cell is one where the chemical energy of combustible gases, e.g. hydrogen, methane, carbon monoxide, or mixtures thereof, is directly converted to electrical energy. A carbon tube is heated in an induction furnace, quenched in cold water, and reheated, when the blowing out of water roughens the tube surface and the carbon becomes porous and activated. The heated tube is again quenched and the heating and quenching steps are repeated twice. The heating of the carbon body may be effected by passage of a current therethrough. |
