Plasma nitriding induced growth of Pt-nanowire arrays as high performance electrocatalysts for fuel cells

Research output: Contribution to journalArticlepeer-review

Authors

  • Kaijie Lin
  • Sairam K Malladi
  • Yaxiang Lu
  • Shuhui Sun
  • Qiang Xu

Colleges, School and Institutes

External organisations

  • Institut national de la recherche scientifique
  • Kavli Institute of Nanoscience, Delft University of Technology

Abstract

In this work, we demonstrate an innovative approach, combing a novel active screen plasma (ASP) technique with green chemical synthesis, for a direct fabrication of uniform Pt nanowire arrays on large-area supports. The ASP treatment enables in-situ N-doping and surface modification to the support surface, significantly promoting the uniform growth of tiny Pt nuclei which directs the growth of ultrathin single-crystal Pt nanowire (2.5–3 nm in diameter) arrays, forming a three-dimensional (3D) nano-architecture. Pt nanowire arrays in-situ grown on the large-area gas diffusion layer (GDL) (5 cm2) can be directly used as the catalyst electrode in fuel cells. The unique design brings in an extremely thin electrocatalyst layer, facilitating the charge transfer and mass transfer properties, leading to over two times higher power density than the conventional Pt nanoparticle catalyst electrode in real fuel cell environment. Due to the similar challenges faced with other nanostructures and the high availability of ASP for other material surfaces, this work will provide valuable insights and guidance towards the development of other new nano-architectures for various practical applications.

Details

Original languageEnglish
Article number6439
Pages (from-to)1-6
Number of pages6
JournalScientific Reports
Volume4
Early online date22 Sep 2014
Publication statusPublished - 22 Sep 2014

Keywords

  • Pt, Nanowire, Nanowires, Array, Active screen plasma nitriding, plasma, nitriding, activation/functionalization chemistry, Surface modification, Fuel cell, Electrocatalyst, PEM fuel cell, PEMFC, Electrode, Direct methanol fuel cells (DMFC), DMFC, Low temperature fuel cell, Oxygen Reduction Reaction (ORR), three dimensional, integrated, in-situ growth, One dimensional, 3D, 1D, Gas diffusion electrode (GDE), GDE, thin film catalyst electrode, thin film