High performance and durable nanostructured TiN supported Pt50-Ru50 anode catalyst for direct methanol fuel cell (DMFC)

JOURNAL OF POWER SOURCES

卷:293

Article

Patel, Prasad Prakash¹  Datta, Moni Kanchan^2,3  Jampani, Prashanth H.²  Hong, Daeho²  Poston, James A.⁴  Manivannan, Ayyakkannu⁴  Kumta, Prashant N.^1,2,3,5,6 

[1] Univ Pittsburgh, Swanson Sch Engn, Dept Chem & Petr Engn, Pittsburgh, PA 15261 USA

[2] Univ Pittsburgh, Swanson Sch Engn, Dept Bioengn, Pittsburgh, PA 15261 USA

[3] Univ Pittsburgh, Ctr Complex Engn Multifunct Mat, Pittsburgh, PA 15261 USA

[4] US DOE, Natl Energy Technol Lab, Morgantown, WV 26507 USA

[5] Univ Pittsburgh, Mech Engn & Mat Sci, Swanson Sch Engn, Pittsburgh, PA 15261 USA

[6] Univ Pittsburgh, Sch Dent Med, Pittsburgh, PA 15217 USA

关键词: Direct methanol fuel cell;    Methanol oxidation;    Platinum;    Ruthenium;    Nanostructured support;    Titanium nitride;   

DOI  :  10.1016/j.jpowsour.2015.05.051

来源: Elsevier

【 摘 要 】

The design of high performance and durable electro-catalyst has been of particular interest for DMFC anodes. Pt(Ru) has been considered the most active DMFC anode catalyst. In this work, the reaction kinetics of Pt(Ru) electro-catalyst has been improved by synthesizing high active surface area Pt-50(Ru-50) catalyst supported on highly conductive nanostructured titanium nitride, TiN. The Pt(Ru)/TiN has been synthesized by a complexed sal-gel (CSG) process using non-halide precursors of Pt and Ru. High surface area Pt(Ru)/TiN shows promising electrochemical performance for methanol oxidation, showing similar to 52% improved catalytic activity at similar to 0.65 V (vs NHE) and stability/durability in comparison with commercial JM-Pt(Ru). Single cell DMFC performance shows 56% improved maximum power density and superior electrochemical stability for CSG-Pt(Ru)/TiN compared to that of commercial JM-Pt(Ru). This is attributed to the uniform dispersion of Pt(Ru) achieved on the nanostructured TiN (support) yielding higher electrochemical active surface area and lower charge transfer resistance than commercial JM-Pt(Ru). Thus, the present study demonstrates the potential of nanostructured TiN as a support for Pt(Ru) based anode electro-catalyst for DMFC applications. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free