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Title: Synthesis and electrochemical characterization of Ti{sub x}Ta{sub y}Al{sub z}N{sub 1-δ}O{sub γ} for fuel cell catalyst supports

Abstract

Quinary Ti{sub x}Ta{sub y}Al{sub z}N{sub 1-δ}O{sub γ} of various compositions have been prepared by a co-precipitation method followed by ammonolysis. The nitride samples were examined as potential catalyst supports in polymer electrolyte membrane fuel cells. The nitride products crystallized in the rock salt (NaCl) structure over a wide range of compositions. The addition of Ta and Al was highly beneficial towards improving the chemical and electrochemical stability of TiN, without a significant loss of electrical conductivity. Platinum particles were successfully deposited on the (oxy)nitride samples, and the composite samples at some compositions were found to be comparable to Pt/carbon in their stability and catalytic activity even without optimizing the Pt deposition and dispersion processes. - Graphical abstract: The effect of additions of Ta and Al into TiN structure. Shifts the lattice constant, and increases its chemical stability in acidic environment.

Authors:
; ;
Publication Date:
OSTI Identifier:
22658196
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 246; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ALUMINIUM COMPOUNDS; CATALYST SUPPORTS; ELECTRIC CONDUCTIVITY; ELECTROCHEMISTRY; FUEL CELLS; LATTICE PARAMETERS; NITROGEN COMPOUNDS; PLATINUM; SALT DEPOSITS; SODIUM CHLORIDES; TANTALUM COMPOUNDS; TITANIUM COMPOUNDS

Citation Formats

Wakabayashi, Ryo H., Abruña, Héctor D., E-mail: hda1@cornell.edu, and DiSalvo, Francis J., E-mail: fjd3@cornell.edu. Synthesis and electrochemical characterization of Ti{sub x}Ta{sub y}Al{sub z}N{sub 1-δ}O{sub γ} for fuel cell catalyst supports. United States: N. p., 2017. Web. doi:10.1016/J.JSSC.2016.11.020.
Wakabayashi, Ryo H., Abruña, Héctor D., E-mail: hda1@cornell.edu, & DiSalvo, Francis J., E-mail: fjd3@cornell.edu. Synthesis and electrochemical characterization of Ti{sub x}Ta{sub y}Al{sub z}N{sub 1-δ}O{sub γ} for fuel cell catalyst supports. United States. doi:10.1016/J.JSSC.2016.11.020.
Wakabayashi, Ryo H., Abruña, Héctor D., E-mail: hda1@cornell.edu, and DiSalvo, Francis J., E-mail: fjd3@cornell.edu. Wed . "Synthesis and electrochemical characterization of Ti{sub x}Ta{sub y}Al{sub z}N{sub 1-δ}O{sub γ} for fuel cell catalyst supports". United States. doi:10.1016/J.JSSC.2016.11.020.
@article{osti_22658196,
title = {Synthesis and electrochemical characterization of Ti{sub x}Ta{sub y}Al{sub z}N{sub 1-δ}O{sub γ} for fuel cell catalyst supports},
author = {Wakabayashi, Ryo H. and Abruña, Héctor D., E-mail: hda1@cornell.edu and DiSalvo, Francis J., E-mail: fjd3@cornell.edu},
abstractNote = {Quinary Ti{sub x}Ta{sub y}Al{sub z}N{sub 1-δ}O{sub γ} of various compositions have been prepared by a co-precipitation method followed by ammonolysis. The nitride samples were examined as potential catalyst supports in polymer electrolyte membrane fuel cells. The nitride products crystallized in the rock salt (NaCl) structure over a wide range of compositions. The addition of Ta and Al was highly beneficial towards improving the chemical and electrochemical stability of TiN, without a significant loss of electrical conductivity. Platinum particles were successfully deposited on the (oxy)nitride samples, and the composite samples at some compositions were found to be comparable to Pt/carbon in their stability and catalytic activity even without optimizing the Pt deposition and dispersion processes. - Graphical abstract: The effect of additions of Ta and Al into TiN structure. Shifts the lattice constant, and increases its chemical stability in acidic environment.},
doi = {10.1016/J.JSSC.2016.11.020},
journal = {Journal of Solid State Chemistry},
number = ,
volume = 246,
place = {United States},
year = {Wed Feb 15 00:00:00 EST 2017},
month = {Wed Feb 15 00:00:00 EST 2017}
}