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Issue 8, 2017
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Preparation of TiO2:TiN composite nanowires as a support with improved long-term durability in acidic medium for polymer electrolyte fuel cells

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Abstract

A TiO2:TiN composite nanowire-supported catalyst is prepared for oxygen reduction activity in polymer electrolyte fuel cells (PEFCs). The TiO2:TiN composite nanowire supported catalyst shows improved catalytic stability compared to carbon supported Pt. Field emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, Brunauer–Emmett–Teller and conductivity measurements have been used to demonstrate morphological effects, oxidation states and crystal structures along with surface area and electrical properties, which play a vital role in enhancing the oxygen reduction reaction. The optimized composition of the TiO2:TiN composite nanowire supported catalyst leads to improved catalyst durability even after 10 000 potential cycles. In PEFCs, the Pt/TiO2:TiN nanowire composite increases corrosion stability and retains 67% of initial cell performance even after 3000 potential cycles between 1 and 1.5 V vs. a dynamic hydrogen electrode as compared to a carbon supported catalyst. After AST, the samples are characterized for the assessment of degradation of fuel cell performance.

Graphical abstract: Preparation of TiO2:TiN composite nanowires as a support with improved long-term durability in acidic medium for polymer electrolyte fuel cells

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Publication details

The article was received on 31 Jan 2017, accepted on 08 Mar 2017 and first published on 17 Mar 2017


Article type: Paper
DOI: 10.1039/C7NJ00374A
Citation: New J. Chem., 2017,41, 2987-2996
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    Preparation of TiO2:TiN composite nanowires as a support with improved long-term durability in acidic medium for polymer electrolyte fuel cells

    P. Dhanasekaran, S. Vinod Selvaganesh and S. D. Bhat, New J. Chem., 2017, 41, 2987
    DOI: 10.1039/C7NJ00374A

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