Journal of Applied Electrochemistry

, Volume 47, Issue 1, pp 105–115 | Cite as

Investigation and modification of carbon buckypaper as an electrocatalyst support for oxygen reduction

  • Sheng-Yang Huang
  • Qingwen Li
  • Yuntian Zhu
  • Peter S. Fedkiw
Research Article
Part of the following topical collections:
  1. Fuel cells

Abstract

The present study focused on a development of a buckypaper [a 45-µm-thick film composed of entangled Carbon nanotube (CNTs)] electrode or electrocatalyst support for oxygen reduction reaction (ORR). The surfaces of the pristine nanotubes in the buckypapers were functionalized by three well-known oxidative approaches: chemical, thermal, and electrochemical. Physical properties of the buckypapers and supported Pt electrocatalysts were characterized by thermogravimetric analysis, Raman spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy (TEM). Electrochemical oxidation created the highest defect density as indicated by Raman data. In contrast, no significant change in surface functional group was observed after thermal oxidation. The TEM images revealed the successful deposition of Pt particles onto the buckypapers (35 wt% Pt/CNT) by an impregnation-reduction method, with average particle size between 2.5 and 3.5 nm. Electrocatalytic activity of the Pt electrocatalysts toward oxygen reduction was evaluated using a rotating disk electrode. The ORR results showed Pt electrocatalysts supported on the modified buckypaper displayed substantially enhanced ORR activity in comparison to the pristine Pt/buckypaper. The highest ORR activity at 0.85 V was ~5.3 mA cm−2. Our results demonstrated that buckypaper may be a potential catalyst support for fuel cell applications.

Graphical Abstract

Keywords

Buckypaper Carbon nanotube (CNT) Support Pt electrocatalyst Oxygen reduction reaction Polymer electrolyte membrane fuel cells (PEMFC) 

Supplementary material

10800_2016_1023_MOESM1_ESM.docx (5.8 mb)
Synthesis of CNTs and Pt/CNT electrocatalysts and results of XRD, Raman, TEM, and CV (DOCX 5900 kb)

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Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • Sheng-Yang Huang
    • 1
  • Qingwen Li
    • 2
  • Yuntian Zhu
    • 3
  • Peter S. Fedkiw
    • 1
  1. 1.Department of Chemical and Biomolecular EngineeringNorth Carolina State UniversityRaleighUSA
  2. 2.Key Laboratory of Nano-Devices and Applications, Suzhou Institute of Nano-Science and Nano-BioticsChinese Academy of SciencesSuzhouChina
  3. 3.Department of Materials Science and EngineeringNorth Carolina State UniversityRaleighUSA

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