• 文献标题:   PtFe/nitrogen-doped graphene for high-performance electrooxidation of formic acid with composition sensitive electrocatalytic activity
  • 文献类型:   Article
  • 作  者:   SUN YF, ZHOU T, PAN QY, ZHANG X, GUO JX
  • 作者关键词:  
  • 出版物名称:   RSC ADVANCES
  • ISSN:   2046-2069
  • 通讯作者地址:   Qingdao Univ Sci Technol
  • 被引频次:   16
  • DOI:   10.1039/c5ra05769h
  • 出版年:   2015

▎ 摘  要

With the aim to pursue novel high-performance electrocatalysts for fuel cells, a simple synthesis strategy, which consists of hydrothermal reaction followed by solid state reduction by H-2, is developed to prepare a series of PtxFe100-x/N-doped graphene nanocomposites with controllable Pt : Fe compositions. The morphology, microstructure, and composition of the samples are systematically characterized with transmission electron microscopy, scanning electron microscopy, energy dispersive spectroscopy, powder X-ray diffraction, X-ray photoelectron spectroscopy and Raman spectroscopy. The effects of nitrogen doping and alloying with Fe, as well as their synergistic interactions, on the improvement of the catalytic performance are well revealed by using the present samples as catalysts for formic acid electrooxidation. Additionally, the composition sensitive catalytic activity and stability of these catalysts for formic acid electrooxidation are probed and the optimum Pt : Fe ratio is presented. The optimum sample possesses both enhanced electrochemical performance and a reduced dosage of the noble metal, making it a promising candidate for fuel cell applications.