When platinum was impregnated on carbon by methanol, surfactant have an important effect on the stability of platinum colloid. As the increase of amount of surfactant enhanced the stability of platinum colloid, the particle size of platinum on carbon ...
When platinum was impregnated on carbon by methanol, surfactant have an important effect on the stability of platinum colloid. As the increase of amount of surfactant enhanced the stability of platinum colloid, the particle size of platinum on carbon was diminished. But, after heat treatment, residue of surfactant remained in electrode to decrease current density of oxygen reduction. To remove surfactant, as temperature of heat treatment enhanced, platinum paticle was aggromerated and current density was decreased.