College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, People's Republic of China.
Nanotechnology. 2013 Jul 26;24(29):295402. doi: 10.1088/0957-4484/24/29/295402. Epub 2013 Jun 27.
Au-Pt core-shell nanoparticles have been synthesized on a reduced graphene oxide (RGO) surface by an under-potential deposition (UPD) redox replacement technique, which involves redox replacement of a copper UPD monolayer by PtCl₄²⁻ that could be reduced and deposited simultaneously. Scanning electron microscopy (SEM) and electrochemical methods have been used to characterize the graphene decorated with Au-Pt core-shell nanoparticles. The electrochemical experiments show that the materials exhibit excellent catalytic activity towards the oxygen reduction reaction and the methanol oxidation reaction. It is believed that the high-performance of this new catalyst is due to the ultrathin Pt shell on the Au nanoparticles surface and the oxygen-containing functional groups on the RGO surface.
金-铂核壳纳米粒子已通过欠电位沉积（UPD）氧化还原置换技术在还原氧化石墨烯（RGO）表面上合成，该技术涉及通过 PtCl₄²⁻将铜 UPD 单层进行氧化还原置换，PtCl₄²⁻可同时被还原和沉积。扫描电子显微镜（SEM）和电化学方法已用于对负载有 Au-Pt 核壳纳米粒子的石墨烯进行特性描述。电化学实验表明，该材料对氧还原反应和甲醇氧化反应表现出优异的催化活性。据信，这种新型催化剂的高性能归因于 Au 纳米粒子表面上的超薄 Pt 壳和 RGO 表面上的含氧官能团。
