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A Yolk@Shell Nanoarchitecture for Au/TiO2 Catalysts


  • Funding for this project was provided by a grant from the U.S. Department of Energy. J.B.J. was partially supported by a National Research Foundation of Korea Grant (NRF-2009-352-D00056). We also thank the groups of Prof. Pinyung Feng (University of California, Riverside) and Prof. Jongheop Yi (Seoul National University) for their help with the Brunauer–Emmett–Teller and thermal gravimetric analysis experiments.


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Trapped inside: A new catalyst was developed where gold nanoparticles are encased inside hollow titania nanospheres (see picture). The new nanoarchitecture prevents the nanoparticles from sintering and losing their activity while still providing the reactants free access to the metal surface. The result is a catalyst capable of promoting the oxidation of CO at room temperature while surviving calcination at temperatures above 775 K.