Affiliation:
1. College of Chemistry and Materials Science Anhui Normal University Wuhu, Anhui Province 241000 China
Abstract
AbstractIn this work, a facile synthesis procedure was developed to deposit Pt−Pd dendrites using the chronopotentiometry (CP) method on polyaniline/carbon nanotube composites. The morphology of the bimetallic Pt−Pd dendrites exhibited a petal‐like shape. The results indicated that multi‐walled carbon nanotubes with larger diameters (approximately 60 nm) demonstrated enhanced support capabilities for achieving uniform dispersion of Pt−Pd dendrites. The electrochemical mass activity for methanol oxidation reaction (MOR) of Pt72Pd28/PANI/CNTs composites reached 670 mA mg−1Pt+Pd, representing a 1.2‐fold increase compared to that of Pt/C. Moreover, the If/Ib value of Pt72Pd28/PANI/CNTs catalyst was 1.9 times higher than that of Pt/C catalyst. Notably, the Pt72Pd28 dendrites displayed superior catalytic performance and COad tolerance in comparison to commercial Pt/C catalysts, as evidenced by their high mass activity and If/Ib value. These research findings present a novel approach for preparing highly active Pt−Pd binary catalysts.