Dodecylamine-modified carbon supports for cathode in proton exchange membrane fuel cells

作者：Lu Juei Dong; Yang Ming Chang^*

来源：Journal of Power Sources, 2011, 196(18): 7450-7457.

DOI：10.1016/j.jpowsour.2011.04.055

• Proton exchange membrane fuel cell
• Catalyst
• Cathode
• Carbon support
• Chemical modification

In this investigation, hydrophobic dodecylamine-modified carbon supports are prepared for proton exchange membrane fuel cells by organic synthesis. Well-dispersed Pt-Ru nanoparticles, with a narrow size distribution, are then deposited on the dodecylamine-modified carbon supports by methanol reduction to serve as cathodic catalysts. These dodecylamine-modified catalysts are separately mixed with either a commercial catalyst or unmodified catalyst to provide hydrophobic channels to convey the reaction gas to the active sites in the catalyst layer. The best cathode composite catalyst, containing 20-40 wt% of modified-catalyst, gives approximate 30% increase in the maximum power density, comparing to E-TEK catalyst (125 mW cm(-2)). The increase in the maximum power density is attributed to higher activity and lower resistance. This result is discussed in the context of AC-impedance and proton conductivity analysis.

• 出版日期2011-9-15