ORR activity and stability of PtCr/C catalysts in a low temperature/pressure PEM fuel cell: Effect of heat treatment temperature

A series of PtCr/C catalysts was prepared by chemical reduction via the seeding/impregnation technique using sodium borohydride (NaBH4) as the reducing agent and then treated at different temperatures in the range of 500–900 °C under a N2 atmosphere for 2 h at ambient pressure. The effect of heat treatment on the catalyst morphology, oxygen reduction reaction activity and stability in a low temperature/pressure proton exchange membrane (PEM)...