Sulfonated polyaniline nanofiber as Pt-catalyst conducting support for proton exchange membrane fuel cell
Autor: | Yu-Kai Han, Ko-Shan Ho, Chung-Wen Kuo, Rong-Hua Wu, Ting-En Wei, Po-Hao Tseng, Ming-Jer Tsai, Tar-Hwa Hsieh, Yen-Zen Wang |
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Rok vydání: | 2014 |
Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Polyaniline nanofibers Carbonization Organic Chemistry Proton exchange membrane fuel cell Sulfuric acid Sulfonic acid Catalysis chemistry.chemical_compound chemistry Chemical engineering Nanofiber Polyaniline Polymer chemistry Materials Chemistry |
Zdroj: | Polymer. 55:2035-2043 |
ISSN: | 0032-3861 |
DOI: | 10.1016/j.polymer.2014.02.066 |
Popis: | Carbonization at high temperature can significantly increase the conductivity of polyaniline nanofibers (PANF) but the created carbonized surface is too hydrophobic for Pt-loading. Sulfonic acid groups are then grafted on the carbonized PANF by ultra-sonication in concentrated sulfuric acid to increase the surface hydrophilicity and Pt-loading. The obtained sulfonated carbonized PANF was found to own not just high conductivity but good hydrophilicity which can load more than 18% of Pt on the surface from a 25% H 2 PtCl 6 (aq) and demonstrate better electrochemical activity in the cyclic voltaic and ORR testing. The surface area of the loaded Pt per unit support can be increased from 85.66 to 276.61 cm 2 mg −1 after 24 h of sulfonation. The single cell performance demonstrates an increasing power and maximum current density with degree of sulfonation for MEA made of the sulfonated carbonized PANF. |
Databáze: | OpenAIRE |
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