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Synergistic PtCo Bimetallic Nanocrystals on Hollow Carbon Nanofibers for High-Performance Alkaline Direct Methanol Fuel Cells
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陈
李
DOI：10.1039/D5CY00831J.png)
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Abstract
En 中文
The high catalytic activity of low Pt bimetallic catalysts in an alkaline medium opens the way for commercializing alkaline direct methanol fuel cells (ADMFC) to reduce costs and increase efficiency. A highly dispersed PtCo bimetallic catalyst supported on hollow carbon nanofibers (PtCo-HCNFs) was synthesized. This catalyst demonstrated exceptional methanol oxidation performance; robust CO tolerance; and remarkable electrochemical stability; attributed to the synergistic electron transfer between the Pt and Co active components. Porous electrospun polyacrylonitrile (PAN) nanofibers and hollow carbon structure provide fast charge transfer channels and load space; ensuring the electrocatalyst has abundant active sites and efficient electron transfer. The optimized PtCo-HCNFs were tested as an anode catalyst for ADMFC single cell and exhibited a power density of 109.8 mW mg-1Pt. Due to the rapid charge transfer and mass transfer caused by its one-dimensional hollow porous structure and the synergistic effect of PtCo bimetal; PtCo-HCNFs is expected to be an economical; efficient; and Co-resistant electrocatalyst for methanol oxidation reaction (MOR).
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