Single atomic platinum catalysts for direct formic acid fuel cell and a method for preparing thereof

摘要

The present invention relates to a single atomic platinum (Pt) catalyst for a fuel cell, and a preparing method thereof. The single atomic Pt catalyst for a fuel cell of the present invention has a different selectivity from existing nanoparticle catalysts since Pt atoms are separated from each other so an ensemble site (where atoms are attached and gathered) does not exist. According to the present invention, Pt is synthesized in a single atomic form on an Sb-doped SnO_2 (antimony-doped tin oxide) (ATO) by using an incipient wetness impregnation method, and a form in which Pt atoms are substituted for an antimony atom of SnSb or ATO (bulk or surface) is confirmed as thermodynamically stable by the DFT calculation. The amount of Pt in a DFAFC complete cell using a Pt1/ATO catalyst as a positive electrode is one tenth of an existing catalyst, but exhibits the same performance as commercial Pt/C. The single atomic Pt catalyst of the present invention improves the energy efficiency of the direct formic acid fuel cell, thereby reducing production costs of a catalyst for producing the direct formic acid fuel cell or production costs of the direct formic acid fuel cell.