FeO薄膜担载的Pt纳米粒子

摘要

FeO film and supported Pt nanopartilces were prepared and their thermo-stability was also investigated in the present studies. The preparative process consisted of two steps. The atomic monolayer of FeO film was firstly grown on Pt(111) crystal surface, and then Pt nanoparticles was deposited on the FeO film in variant settings. The Pt nanoparticles supported on FeO were around 2~3 nanometer in size and dispersed evenly on the surface, forming a Pt/FeO/Pt(111) model catalyst. Treatment in 1.1×10-6 mbar O2 and at different annealing temperatures could not promote the dispersion of Pt nanoparticles on FeO film effectively or did not facilitate the formation of arrays of uniform nanoparticles. The Pt nanoparticles supported on FeO thin film display potential application as a novel platinum-based catalyst.%研究了FeO/Pt(111)体系中FeO薄膜及其担载的Pt纳米粒子的制备和热稳定性。在Pt(111)表面制备出完整的单层FeO薄膜，并作为载体制备2~3 nm粒径均一且分散均匀的纳米Pt粒子，形成 Pt/FeO/Pt(111)模型催化剂。氧气气氛(1.1×10-6 mbar)以及不同温度的退火处理并不能有效地促进Pt粒子在FeO薄膜表面的分散，也不利于形成全同有恅的Pt纳米粒子阵列。单层FeO表面担载的Pt纳米粒子已能够符合相关模型催化剂研究工作的总要，将成为下一步的工作基础。