Effect of N-Doped Graphene for Properties of Pt/N-Doped Graphene Catalyst
Date
2017Author
Siburian, Rikson
Sebayang, Kerista
Supeno, Minto
Marpaung, Harlem
Metadata
Show full item recordAbstract
Nitrogen doping into graphene was carried out by heating
Graphene Nano Sheets (GNS) in ammonia to produce N-doped
graphene (N G). The N G was used as a support material for Pt
catalyst as well as a catalyst itself for half-cell cathode reaction
of hydrogen fuel cell (H2FC). It is found that the Oxygen
Reduction Reaction (ORR) electro catalytic activity for N G 900
(0.63 V versus RHE) is higher than GNS. It indicates that the
incorporation of nitrogen in N G may affect the ORR activities.
XPS results exhibit the pyridinic N is the majority in N G, where
the pyridinic N refers to N atom bonds with two C atoms at the
edges or defects of graphene. Interestingly, the Pt subnanoclusters
were formed on all of Pt/N G catalysts with Pt particle
size (0.7–1.0 nm). It clearly indicates that the doping of nitrogen
significantly influence p–d hybridization in terms of electronic
structures.