• 文献标题:   Bimetallic-metal oxide nanoparticles of Pt-M (M: W, Mo, and V) supported on reduced graphene oxide (rGO): radiolytic synthesis and methanol oxidation electrocatalysis
  • 文献类型:   Article, Early Access
  • 作  者:   KIANFAR S, GOLIKAND AN, ZARENEZHAD B
  • 作者关键词:   bimetallic nanocatalyst, irradiation synthesi, methanol oxidation, electrochemical activity
  • 出版物名称:   JOURNAL OF NANOSTRUCTURE IN CHEMISTRY
  • ISSN:   2008-9244 EI 2193-8865
  • 通讯作者地址:   Semnan Univ
  • 被引频次:   0
  • DOI:   10.1007/s40097-020-00366-6 EA NOV 2020
  • 出版年:  

▎ 摘  要

Nanocatalysts of Pt and Pt-M (M: V, MO and W) supported on rGO were successfully synthesized via a simple process based on irradiation and investigated as electrocatalysts in terms of methanol oxidation in acidic medium. Morphology, purity and composition of the catalysts were analyzed by ICP, TEM, XRD, and EDX. Irradiation caused the metallic nanoparticles (from 1 to 8 nm in diameter) to be deposited on the graphene sheets without using any stabilizer and surfactant. Bimetallic nanocatalysts exhibited higher electrochemical activities of methanol oxidation comparing to monolithic Pt catalyst at ambient temperature. A considerable increase in the effective active surface area (ECSA) was observed when the tungsten was used as the second metal; this value was in the order of Pt-Mo > Pt-V > Pt for other catalysts. Finally, high catalytic activity, great durability, and stability of Pt-W offer it to be a promising electrocatalyst for development of more advanced direct alcohol fuel cells. Graphic abstract