Effects of CeO2 pre-calcined at different temperatures on the performance of Pt/CeO2-C electrocatalyst for methanol oxidation reaction

Pt/CeO2-C catalysts with CeO2 pre-calcined at 300-600 degrees C were synthesized by combining hydrothermal calcination and wet impregnation. The effects of the pre-calcined CeO2 on the performance of Pt/CeO2-C catalysts in methanol oxidation were investigated. The Pt/CeO2-C catalysts with pre-calcined CeO2 at 300-600 degrees C showed an average particle size of 2.6-2.9 nm and exhibited better methanol electro-oxidation catalytic activity than the commercial Pt/C catalyst. In specific, the Pt/CeO2-C catalysts with pre-calcined CeO2 at 400 degrees C displayed the highest electrochemical surface area value of 68.14 m(2)center dot g(-1) and I-f/I-b ratio (the ratio of the forward scanning peak current density (I-f) and the backward scanning peak current density (I-b)) of 1.26, which are considerably larger than those (53.23 m(2)center dot g(-1) and 0.79, respectively) of the commercial Pt/C catalyst, implying greatly enhanced CO tolerance.

Automated summary

The Pt/CeO2-C catalysts with CeO2 pre-calcined at 300-600 degrees C showed improved methanol electro-oxidation catalytic activity compared to commercial Pt/C catalysts, with the catalyst pre-calcined at 400 degrees C displaying the highest electrochemical surface area and I-f/I-b ratio, indicating enhanced CO tolerance.