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Platinum Nanoparticles Modified with Perfluorinated Alkylamines as a Model Cathode Catalyst for Fuel Cells
Author(s) -
Miyabayashi Keiko,
Miyake Mikio
Publication year - 2017
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201600625
Subject(s) - catalysis , platinum , thermogravimetric analysis , platinum nanoparticles , nafion , materials science , dissolution , proton exchange membrane fuel cell , x ray photoelectron spectroscopy , chemical engineering , inorganic chemistry , nanoparticle , oxide , carbon black , fourier transform infrared spectroscopy , surface modification , electrocatalyst , chemistry , nuclear chemistry , electrochemistry , organic chemistry , nanotechnology , electrode , natural rubber , composite material , engineering , metallurgy
Platinum nanoparticles (NPs) modified with undecafluorohexylamine (UFHA) and octylamine were synthesized as a novel model cathode catalyst for fuel cells. The modified Pt NPs were well characterized by FTIR, X‐ray photoelectron spectroscopy, thermogravimetric analysis, and transmission electron microscopy. These NPs supported on carbon black were applied as electrocatalysts for the oxygen reduction reaction. The UFHA‐modified Pt NP catalyst showed high electrocatalytic activity and durability compared to a commercial catalyst. Besides suppression of undesired oxide formation on the Pt surface, the affinity between the perfluorinated alkyl chains of UFHA and Nafion ® improved the catalyst activity by creating a desirable proton conduction path. Additionally, UFHA modification improved durability by suppressing Pt dissolution and carbon corrosion because of restricted water accessibility. The β ‐oxide formation, which is responsible for Pt dissolution, was significantly attenuated by surface modification.