Tang, Jason M. and Jensen, Kurt and Waje, Mahesh and Li, Wenzhen and Larsen, Paul and Pauley, Kevin and Chen, Zhongwei and Ramesh, Palanisamy and Itkis, Mikhail E. and Yan, Yushan and Haddon, Robert C. (2007) High performance hydrogen fuel cells with ultralow Pt loading carbon nanotube thin film catalysts. JOURNAL OF PHYSICAL CHEMISTRY C, 111 (48). pp. 17901-17904.
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Fuel cell membrane electrode assemblies with Pt loading of 0.2 ing pt/cm(2) at the anode and ultralow Pt loadings of 6 mu g pt/cm(2) and 12 mu g pt/cm(2) at the cathode have been fabricated using thin films of multiwalled carbon nanotube supported Pt catalysts (Pt/MWNTs) at the cathode. The Pt/MWNTs have a Pt weight loading of 26.8 wt % and a uniform and small Pt particle size of 2.1 nm. The MWNTs used are 360 mu m long. This thin film cathode catalyst layer with a loading of 6 mu g Pt/cm(2) is about 1.3 mu m thick, contains no ionomer, and exhibits surprisingly high performance in a hydrogen proton exchange membrane fuel cell. The peak power density for a membrane electrode assembly with a cathode loading of 12 mu g pt/cm(2) when tested at 70 degrees C with hydrogen and oxygen is 613 mW/cm(2). A mass activity (ampere per milligram of Pt) based on the cathode Pt loading greater than 250 A/mg Pt is achieved with 6 mu g Pt/cm(2), and this is among the highest reported to date.
|Subjects:||Technology > Nanotechnology and energy applications|
|Deposited By:||Lesley Tobin|
|Deposited On:||08 Dec 2008 16:13|
|Last Modified:||09 Feb 2009 17:32|
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