Synthesis and electrochemical characterization of Ti_xTa_yAl_zN_1-δO_γ for fuel cell catalyst supports

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• 作者：Ryo H. Wakabayashi ; Hé ; ctor D. Abruñ ; a ; ^{hda1@cornell.edu} ; Francis J. DiSalvo ; ^{fjd3@cornell.edu}
• 关键词：Nitrides ; Nanoparticles ; Alkaline fuel cells ; Catalyst supports
• 刊名：Journal of Solid State Chemistry
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：246
• 期：Complete
• 页码：293-301
• 全文大小：1697 K
• 卷排序：246

文摘

Quinary TixTayAlzN1-δOγ 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.