CVD grown graphene as catalyst for acid electrolytes

M. Suha Yazici*, M. Akif Azder, Omer Salihoglu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Chemical Vapor Deposition (CVD) process is utilized to grow and study behavior of porous, continuous-phase 3D graphene structures in acid electrolyte. Graphene layers that are produced by CVD process are tested for oxygen reduction reaction (ORR) activity by Rotating Disc Electrode (RDE) measurements in 0,1 M HClO4 electrolyte. Raman spectroscopy measurements confirms multi-layer porous structure formation for more than 1 min grow on nickel foam. Multi-layer porous graphene has provided μA level current. When NH3 is used for nitrogen (N)-doping, magnitude of the reduction current increases, but still low for practical usage of graphene in acid electrolytes as catalyst. N-doping is confirmed with XPS measurements showing all possible types of N-doping phases with 900 °C being better than 1000 °C doping. CVD grown continuous-phase graphene, by itself or N-doped, cannot provide enough electrocatalytic activity to be used in 0,1 M HClO4 acid electrolyte or polymer electrolyte membrane (PEM) fuel cells for practical applications. Pt layer of 10 nm has been sputtered on to graphene (21.45 μg/cm2 Pt loading) and has provided orders of magnitude increase in oxygen reduction current compare to bare graphene layers.

Original languageEnglish
Pages (from-to)10710-10716
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume43
Issue number23
DOIs
Publication statusPublished - 7 Jun 2018
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2018

Funding

Financial support provided by the TUBITAK -ARDEB through 1003 program under contract #215M302 is greatly acknowledged.

FundersFunder number
ARDEB215M302
TUBITAK

    Keywords

    • CVD
    • N-doping
    • Oxygen reduction
    • Porous graphene
    • RDE

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