Catalytic activity of supported au nanoparticles deposited from block copolymer micelles
Catalytic activity of supported au nanoparticles deposited from block copolymer micelles
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DOI：
10.1021/ja029800v
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发表时间：
2003-06-18
影响因子：
15
通讯作者：
McFarland, EW
中科院分区：
文献类型：
--
作者：
Jaramillo, TF;Baeck, SH;McFarland, EW
采用嵌段共聚胶束包覆金前驱体的方法，通过浸渍法制备了粒径可控的准有序、高度分散的金纳米团簇。用这种方法在ITO镀膜玻璃上沉积了大小为4.8±1.3 nm的金粒子，并对一氧化碳的电氧化具有催化活性。XPS证实了催化活性粒子主要是Au0，但也有很大一部分以Au3+的形式存在。虽然块体金是惰性的，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来获得。
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.