Abstract: The electrocatalytic performance of the Pd/TiC-C catalysts for the oxidation of formic acid was investigated. It was found that the electrocatalytic performance of the Pd/TiC-C catalysts for the oxidation of formic acid in the direct formic acid fuel cell is better than that of Pd/C catalyst. Furthermore, the electrocatalytic performance of the Pd/TiC-C catalysts is related to the weight ratio of C and TiC. When the weight ratio is 2 the electrocatalytic activity and stability of Pd/TiC-C catalyst is best. The peak potential of the oxidation of formic acid at the Pd/TiC-C catalyst with weight ratio of 2 is located at 0.164 V. which is 12 mV more negative than that at the Pd/C catalyst electrode. The peak current density is 23.08 mA/cm2, which is 42% larger than that at the Pd/C catalyst electrode.

Key words: Titanium carbide, Palladium, Active carbon, Direct formic acid fuel cell