Catalytic activity of supported Au nanoparticles deposited from block copolymer micelles.
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.
Jaramillo
Thomas F
TF
Department of Chemical Engineering, University of California, Santa Barbara, California 93106-5080, USA.
Baeck
Sung-Hyeon
SH
Cuenya
Beatriz Roldan
BR
McFarland
Eric W
EW