标题：Ultra-clean PtPd nanoflowers loaded on GO supports with enhanced low-temperature electrocatalytic activity for fuel cells in harsh environment
作者：Xu, Linlin ;Cui, Qingqiang ;Zhang, Hua ;Jiao, Anxin ;Tian, Yue ;Li, Shuang ;Li, Hengshuai ;Chen, Ming ;Chen, Feng
作者机构：[Xu, Linlin ;Cui, Qingqiang ;Zhang, Hua ;Jiao, Anxin ;Tian, Yue ;Chen, Ming ;Chen, Feng ] School of Physics, Shandong University, Jinan 250100; Shando 更多
来源：Applied Surface Science
关键词：Enhanced low-temperature electrocatalytic activity; Methanol oxidation reaction; Modified in-situ overgrowth strategy; Ultra-clean GO/PtPd NFs
摘要：How the fuel cells could be performed in a cold climate is an enormous challenge for widespread applications, which is highly related to the construction of efficient low-temperature electrocatalysts with stabilizer/surfactant-free clean surface. Herein, ultra-clean and monodisperse PtPd nanoflowers (NFs) deposited on graphene oxide (GO) were successfully synthesized via a modified in-situ overgrowth strategy by adding ethanol as an efficient booster in the redox reaction between GO and metallic precursors. As for methanol oxidation reaction (MOR), the resulting GO/PtPd NFs provide much higher electrocatalytic performances (mass and specific activity as well as long-term durability) than the loading of monometallic Pt or Pd nanoparticles on the GO support. Especially, compared to MOR test at room temperature (25 °C), 70% electrocatalytic activity of GO/PtPd NFs can be maintained even under low temperature (5 °C) condition, while that of commercial Pt/C catalysts is merely about 57%. The unique product with enhanced low-temperature electrocatalytic activity holds great potential for promoting the utilization of fuel cells in grimly cold weather condition. © 2020 Elsevier B.V.