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High performance and durable nanostructured TiN supported Pt50-Ru50 anode catalyst for direct methanol fuel cell (DMFC)
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DOI：10.1016/j.jpowsour.2015.05.051.png)
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Abstract
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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.
Keywords:
Direct methanol fuel cell
Methanol oxidation
Platinum
Ruthenium
Nanostructured support
Titanium nitride
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