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Ionics

, Volume 25, Issue 1, pp 181–189 | Cite as

PtRu nanoparticles supported on p-phenylenediamine-functionalized multiwalled carbon nanotubes: enhanced activity and stability for methanol oxidation

  • Bohua WuEmail author
  • Jiajin Zhu
  • Xue Li
  • Xiaoqin Wang
  • Jia Chu
  • Shanxin Xiong
Original Paper
  • 63 Downloads

Abstract

A facile method was developed for preparation of PtRu nanoparticles/multiwalled carbon nanotubes (MWCNTs) electrocatalysts for methanol oxidation. Starting from pristine MWCNTs, high dispersion of PtRu nanoparticles was directly assembled on the side wall of MWCNTs by using p-phenylenediamine (PPDA) as the inter-linker. FTIR and Raman spectroscopy examinations show that PPDA can be immobilized on pristine MWCNTs by π-π stacking, and the integral structure of MWCNTs was preserved after modification. TEM and XRD investigations show that the face-centered cubic (fcc) Pt structure of PtRu alloy nanoparticles with average diameter 3.5 ± 0.5 nm are uniformly supported on the surface of PPDA-functionalized MWCNTs (PPDA-MWCNTs). The resulting PtRu/PPDA-MWCNTs catalyst exhibits a more negative onset potential (0.15 V) than PtRu/MWCNTs (0.33 V), showing the higher electrocatalytic activity towards methanol oxidation, while its forward peak current density (731.6 mAmg−1 of Pt) is 1.66 times higher than that of PtRu/MWCNTs (440.5 mAmg−1 of Pt). The PtRu/PPDA-MWCNTs catalyst also shows significantly enhanced steady-state current and long-term stability. The smaller size, better dispersion, and higher electrochemical surface area (73.5 m2 g−1) of the PtRu nanoparticles on PPDA-MWCNTs result in superior electrocatalytic performance towards methanol oxidation. This work may provide an efficient method to fabricate MWCNTs-supported superior noble metal catalysts for broad applications in energy systems and sensing devices.

Keywords

Anodes Catalyzes Electrochemical stabilities Electrodes Fuel cells 

Notes

Funding information

This work was financially supported by the National Natural Science Foundation of China (21303134) and Outstanding Youth Science Fund of Xi’an University of Science and Technology (2018YQ2-13).

Supplementary material

11581_2018_2590_MOESM1_ESM.doc (1.5 mb)
ESM 1 (DOC 1504 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Bohua Wu
    • 1
    Email author
  • Jiajin Zhu
    • 1
  • Xue Li
    • 1
  • Xiaoqin Wang
    • 1
  • Jia Chu
    • 1
  • Shanxin Xiong
    • 1
  1. 1.College of Chemistry and Chemical EngineeringXi’an University of Science and TechnologyXi’anPeople’s Republic of China

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