Ionomer content effects on the electrocatalyst layer with in-situ grown Pt nanowires in PEMFCs

Kaihua Su, Xianyong Yao, Sheng Sui, Zhaoxu Wei, Junliang Zhang, Shangfeng Du

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The effects of ionomer contents were investigated in composite electrodes with in-situ grown single crystal Pt nanowires (Pt-NWs) for PEMFCs, including the amount in the carbon matrix and impregnated on the surface of the electrocatalyst layer. The electrocatalyst layer was prepared by growing Pt-NWs directly on the carbon matrix with a simple one-step wet chemical approach at room temperature. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), polarization curve tests, electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV) were employed to evaluate the ionomer effects. The experimental results showed that the ionomer in the carbon matrix had an influence on the ionic conductivity and aggregation and distribution of the Pt-NWs, and the ionomer impregnated on the surface of the electrocatalyst layer affected the mass transport and ionic conductivity. The performance of the MEA was improved by optimizing the ionomer contents.

Original languageEnglish
Pages (from-to)3219-3225
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume39
Issue number7
Early online date17 Jan 2014
DOIs
Publication statusPublished - 25 Feb 2014

Keywords

  • Distribution
  • Electrocatalyst layer
  • Ionomer
  • Polymer electrolyte membrane fuel cell
  • Pt nanowire

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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