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Electrospinning synthesis of porous carbon fiber supported Pt-SnO2 anode catalyst for direct ethanol fuel cell.
- Source :
-
Solid State Sciences . Aug2019, Vol. 94, p64-69. 6p. - Publication Year :
- 2019
-
Abstract
- Pt-SnO 2 catalysts supported on modified carbon fibers were prepared by an electrospinning method with polyacrylonitrile (PAN) as the carrier and polyvinylidene fluoride (PVDF) as the pore-forming agent. The physical-chemical property and catalytic performance of the as-synthesized composites were characterized by XRD, SEM, BET, Chronoamperometry and AC impedance. The results showed that the porous structure in the carbon fibers was formed after calcination at 800 °C in the presence of PVDF. When the weight ratio of PAN/PVDF was 1:0.8, the porous carbon fibers had the largest surface area of 374.85 m2 g−1, which was 3.3 times of carbon fibers prepared without PVDF. The in-situ formed porous structure in carbon fibers can provide more active sites for the catalytic reaction. Therefore, the porous carbon fiber supported Pt-SnO 2 catalysts exhibited the best catalytic performance with the ethanol oxidation peak current value of 140.14 mA cm−2 and the electrochemical active area up to 54.296 m2 g−1. DEFC performance showed that the best potential was 0.7 V and the maximum of power density was 18.1 mW cm−2 when the oxygen flow rate and the temperature were 100 mL min−1 and 80 °C, respectively. Pt-SnO 2 catalysts supported on modified carbon fibers were prepared by an electrospinning method with polyacrylonitrile (PAN) as the carrier and polyvinylidene fluoride (PVDF) as the pore-forming agent. When the weight ratio of PAN/PVDF was 1:0.8, the porous carbon fibers had the largest surface area of 374.85 m2 g−1. The porous carbon fiber supported Pt-SnO 2 catalysts exhibited the best catalytic performance with the ethanol oxidation peak current value of 140.14 mA cm−2 and the electrochemical active area up to 54.296 m2 g−1. Image 1 • Porous carbon fibers were prepared by one-step electrospinning method. • PVDF was used as the pore-forming reagent during the carbonization process. • Porous C/Pt-SnO 2 exhibited the best catalytic activity for the ethanol oxidation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 12932558
- Volume :
- 94
- Database :
- Academic Search Index
- Journal :
- Solid State Sciences
- Publication Type :
- Academic Journal
- Accession number :
- 137432549
- Full Text :
- https://doi.org/10.1016/j.solidstatesciences.2019.05.018