An Investigation of Palladium Oxygen Reduction Catalysts for the Direct Methanol Fuel Cell

Table 2

Current densities at 0.4 V, cell voltage at 5 mA·cm⁻², open circuit potential and peak power densities for a direct methanol fuel cell with 1 M methanol.

Cathode catalyst	Temperature; (°C)	Cathode fed	Voltage at; 5 mA·cm^−2 (mV)	Open circuit potential (mV)	Current density at 0.4 V (mA·cm^−2)	Peak power density (mW cm^−2)
Pd/C	20	Air	335	714	3.0	2.3
Pt/C-Etek	20	Air	451	685	8.2	6.4
Pd/C	20	O2	390	739	4.5	3.4
Pt/C-Etek	20	O2	497	689	13.8	10.0
Pd/C	40	Air	448	698	7.6	5.4
Pt/C-Etek	40	Air	536	695	16.8	13.2
Pd/C	40	O2	482	720	10.0	6.9
Pt/C-Etek	40	O2	563	731	25.5	17.0
Pd/C	60	Air	500	693	12.8	8.3
Pt/C-Etek	60	Air	567	693	27.0	20.6
Pd/C	60	O2	542	708	18.4	11.1
Pt/C-Etek	60	O2	605	729	45.6	29.1