Abstract
According to standard contact porosimetry data, treatment of electrospun pyropolymer mats based on pyrolyzed polyacrylonitrile and polybenzimidazole (PBI) nanofibers with a mixture of sulfuric and nitric acids causes a drastic increase in the specific surface area of macro- and mesopores and complete disappearance of micropores. Acid treatment is followed by hydrophilization of pores with radii r < 10 nm. Taken altogether, these effects lead to higher performance of the membrane-electrode assembly of a high-temperature polymer electrolyte membrane fuel cell based on PBI membrane with the cathode made of the platinized acid-treated material.
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This study was financially supported by the Russian Science Foundation (Grant No. 18-13-00421).
Elemental analysis was performed with support from the Ministry of Science and Higher Education of the Russian Federation using the equipment of the Center for Molecular Composition Studies of INEOS RAS.
On the occasion of the 65th anniversary of the foundation of A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences.
Based on the materials of the International Conference “Chemistry of Organoelement Compounds and Polymers 2019” (November 18–22, 2019, Moscow, Russia).
Published in Russian in Izvestiya AkademiiNauk. Seriya Khimicheskaya, No. 6, pp. 1106–1113, June, 2020.
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Skupov, K.M., Ponomarev, I.I., Volfkovich, Y.M. et al. Porous structure optimization of electrospun carbon materials. Russ Chem Bull 69, 1106–1113 (2020). https://doi.org/10.1007/s11172-020-2875-7
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DOI: https://doi.org/10.1007/s11172-020-2875-7