Jaramillo Thomas F, Baeck Sung-Hyeon, Cuenya Beatriz Roldan, McFarland Eric W
Department of Chemical Engineering, University of California, Santa Barbara, California 93106-5080, USA.
J Am Chem Soc. 2003 Jun 18;125(24):7148-9. doi: 10.1021/ja029800v.
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.
通过用嵌段共聚物胶束包裹的金前驱体浸涂基底，合成了粒径严格可控的准有序、高度分散的金纳米团簇。通过这种方法，金颗粒（4.8±1.3纳米）沉积在涂有ITO的玻璃上，并显示出对一氧化碳电氧化具有催化活性。X射线光电子能谱证实，具有催化活性的颗粒主要是Au0；然而，很大一部分以Au3+的形式存在。虽然块状金是惰性的，但这些结果表明，具有催化活性的金纳米颗粒可以通过胶束包裹得到。
