Porous Nanoparticle Membranes: Synthesis and Application as Fuel-Cell Catalysts


  • This work was supported in part by the U.S. National Science Foundation (CAREER Award, DMR-0 449 849, and SGER Grant, CTS-0 417 722), the Department of Energy (DOE, DE-FC03-92SF19 460) through the Laboratory for Laser Energetics (LLE), and the University of Rochester. We are grateful to the LLE for a Horton Fellowship (XT). We thank Mr. Qijie Guo and Mr. Yong Wang for help. The support of the DOE does not constitute an endorsement by the DOE of the views expressed in this article.


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Nanoporous membranes of magnetic Fe2O3 and catalytic Pt nanoparticles are made using anodized aluminum oxide porous substrates as sacrificial templates. Langmuir–Blodgett (LB) deposition is used to make single-layered films (the Figure shows a Fe2O3 nanoparticle membrane after removal of the stabilizing surfactant).