Abstract
Continuous-phase, porous graphene was produced by CVD process and tested for suitability as catalyst and catalyst support for polymer electrolyte membrane (PEM) fuel cells. N-doping of CVD graphene was carried by NH3 gas flown over graphene for a given time. Ultralow Pt was sputter deposited onto porous, continuous phase N-doped graphene. Oxygen reduction reaction (ORR) activity by Rotating Disc Electrode (RDE) in 0,1 M HClO4 electrolyte and PEM fuel cell performance were measured. N-doping and thicker Pt sputtering increases reduction current in RDE measurements. Sputter deposition of 1 nm and 10 nm Pt on CVD graphene (2.1 and 21.45 μgPt/cm2 loading) has shown orders of magnitude increase in current compare to only-graphene samples. In fuel cell testing, sputter deposited Pt layer of 10 nm has provided 2.5 A/mgPt at 0.5 V polarization while 1 nm samples shows 15 A/mgPt performance at the same voltage.
| Original language | English |
|---|---|
| Pages (from-to) | 18572-18577 |
| Number of pages | 6 |
| Journal | International Journal of Hydrogen Energy |
| Volume | 43 |
| Issue number | 40 |
| DOIs | |
| Publication status | Published - 4 Oct 2018 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2018 Hydrogen Energy Publications LLC
Funding
Financial support provided by the TUBITAK-ARDEB through 1003 program under contract # 215M302 is greatly acknowledged.
| Funders | Funder number |
|---|---|
| TUBİTAK-ARDEB | 215M302 |
Keywords
- CVD graphene
- Oxygen reduction
- PEM fuel cell
- Sputter Pt
