Iron-Embedded Porous Carbon Nanofibers as Pt Electrocatalyst Supports for Direct Methanol Fuel Cells
Pt electrocatalysts well-dispersed on iron (Fe)-embedded porous carbon nanofiber (CNF) supports were synthesized using electrospinning and a reduction method for improved methanol electrooxidation. To study the effects of the amount of Fe embedded in the porous CNF supports, we used three different amounts of Fe precursor: 4 wt% (sample A), 8 wt% (sample B), and 12 wt% (sample C). Among them, sample B exhibited the highest anodic current density of 619.0 mA/mgPt and excellent electrocatalytic stability compared to commercial Pt/C and Pt/CNFs. The enhanced methanol electro-oxidation performance can be explained by the combined effects of increased active area between the Pt electrocatalysts and the electrolyte due to well-dispersed Pt electrocatalysts on porous CNF supports, and the improved electrical conductivity of the supports due to the efficient electron transfer by Fe nanoparticles embedded within porous CNFs.
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Document Type: Research Article
Affiliations: Department of Materials Science and Engineering, Seoul National University of Science and Technology, Seoul 139-743, South Korea
Publication date: 01 November 2017
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