Catalytic activity of supported Au nanoparticles deposited from block copolymer micelles |
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Authors: | Jaramillo Thomas F Baeck Sung-Hyeon Cuenya Beatriz Roldan McFarland Eric W |
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Institution: | Department of Chemical Engineering, University of California, Santa Barbara, California 93106-5080, USA. |
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Abstract: | Quasi-ordered, highly dispersed, gold nanoclusters of tightly controlled particle size were synthesized by dip-coating substrates with gold precursors encapsulated by block-copolymer micelles. By this method, gold particles (4.8 +/- 1.3 nm) were deposited on ITO-coated glass and shown to be catalytically active for electro-oxidation of carbon monoxide. XPS confirmed the catalytically active particles were predominantly Au0; however, a large fraction existed as Au3+. Whereas bulk gold is inert, these results demonstrate that catalytically active Au nanoparticles can be derived from micelle encapsulation. |
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