Preparation of carbon supported Pd-P catalyst with high content of element phosphorus and its electrocatalytic performance for formic acid oxidation

摘要

The carbon supported Pd-P (Pd-P/C) anodic catalyst in direct formic acid fuel cell (DFAFC) was prepared with a novel phosphorus reduction method. The Pd-P/C catalyst obtained possesses the high content of P in the alloying state. Because alloying P could decrease the 3d electron density of Pd and the adsorption affinity of CO and H on Pd, alloying P would promote the formic acid (FA) oxidation through the direct pathway. Therefore, the electrocatalytic performance of the Pd-P/C catalyst for the FA oxidation is much better than that of the Pd/C catalyst.