WATLab and Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada.
Langmuir. 2013 Jan 22;29(3):927-31. doi: 10.1021/la303809m. Epub 2013 Jan 7.
Spherical Au-Pt alloy nanoparticles of 10 nm average size have been prepared on a H-terminated Si(100) substrate by an extremely simple method of dip-coating. X-ray photoelectron spectroscopy and glancing-incidence X-ray diffraction confirm the formation of Au-Pt alloy. The Au(3+) ions are first reduced on the Si substrate upon dipping, and the freshly formed Au nuclei then work as a "catalyst" by promoting the reduction of PtCl(6)(2-) ions on the Au nuclei. The subsequent interdiffusion of Au and Pt atoms leads to the observed alloy formation. The present method provides an environment-friendly, low-cost route to preparing anode electrodes in fuel cells.
在 H 终止的 Si(100) 衬底上，通过极其简单的浸涂方法制备了平均粒径为 10nm 的球形 Au-Pt 合金纳米粒子。X 射线光电子能谱和掠入射 X 射线衍射证实了 Au-Pt 合金的形成。Au(3+) 离子首先在浸渍时还原在 Si 衬底上，然后新形成的 Au 核通过促进 PtCl(6)(2-) 离子在 Au 核上的还原，起到“催化剂”的作用。随后 Au 和 Pt 原子的互扩散导致了观察到的合金形成。本方法为制备燃料电池中的阳极电极提供了一种环保、低成本的途径。
