Abstract
In this study, we chose SBA-15 with platelet morphology as template to synthesize nanostructured Pt replica and applied it to electrochemical oxygen reduction reaction. We impregnated TMOS and urea solution into platelet-like SBA-15 by incipient wetness impregnation, and successfully reduced the pore size of SBA-15 and also increased the thickness of the pore wall. We further used this pore-size-reduced SBA-15 as template to synthesize Pt replica by impregnating molten metal precursor followed by hydrogen reduction. As for the electrochemical oxygen reduction reaction, the Pt replica performed high electrochemical activity surface area and mass activity. This platinum material replicated from pore - size - reduced SBA-15 has thinner Pt wires and wider space between adjacent Pt wires. As the result, the material exhibited larger surface area and less influence in the electrical double layer.