activity evaluation of commercial pd/c for formate oxidation reaction

Direct formate fuel cells use various anode catalysts, with the most commonly used catalyst being commercial pd/c. a comparison between the performance of ethanol oxidation on pd/c and pt/c electrocatalysts in an alkaline environment revealed that pd/c is superior for two reasons. firstly, palladium has a higher oxygen affinity which enables it to better absorb various catalysts that are utilized in fuel cells, with pd/c being the most frequently used one. secondly, palladium is more durable and less susceptible to poisoning from direct oxidation of liquid fuel. (1) to investigate the pd/c activity for formate oxidation, experiments were conducted using a commercial pd/c catalyst. the catalyst ink consists of 5 mg of 10 wt% pd/c, along with 30% wt% of nafion, which includes 0.0428 ml of a mixture of water and isopropyl alcohol in a ratio of 1:9 as solvent. the ink is mixed well and dispersed onto a glassy carbon electrode using a high-precision syringe. the prepared electrode is then placed in an oven at 80℃ for 60 min. afterward, a three-electrode system is performed using a platinum plate counter electrode and an ag/agcl reference electrode.