1 research outputs found
Electrooxidation of Methanol on Pt @Ni Bimetallic Catalyst Supported on Porous Carbon Nanofibers
This
paper describes the preparation of Ni/Pt/CNFs via electrospinning
technology, carbonization process, and chemical reduction method.
The structure and composition of Ni/Pt/CNFs were characterized with
X-ray diffraction, Raman spectroscopy, nitrogen adsorption isotherms,
and X-ray photoelectron spectroscopy. Meanwhile, the morphology was
analyzed with scanning electron microscopy and transmission electron
microscopy. The electrochemical performance was evaluated by oxygen
reduction reaction (ORR), cyclic voltammetry and chronopotentiometry.
The results indicated that Pt and Ni nanoparticles were completely
reduced in the experimental process and homogeneously distributed
on the nanofibers with the average diameters of 3.8 and 17.8 nm, respectively.
In addition, the Ni<sub>50</sub>/Pt/CNFs catalyst showed excellent
electrocatalytic performance for ORR and superior specific and mass
activities for methanol oxidation (the maximum current density is
ca. 10.9 mA cm<sup>–2</sup>) and exhibited a slightly slower
current decay over time, better than the reference samples which indicated
a higher tolerance to CO-like intermediates