Ni-O4 species anchored on N-doped graphene-based materials as molecular entities and electrocatalytic performances for oxygen reduction reaction
Abstract
The generation of molecular active species on the surface of nano-materials has become promising routes to produce efficient electrocatalysts. Development of cost-effective catalysts with high performances for oxygen reduction reaction (ORR) is an important challenge for fuel cell and metal-air battery applications. In this work, we report a novel hybrid produced by room-temperature solution processes using Ni-based organometallic molecules and N-doped graphene-based materials. Chemical and structural characterizations reveal that Ni-containing species are well-dispersed on the surface of graphene network as molecular entity. The hybrid shows excellent electrocatalytic performances for ORR in basic medium with an onset potential of 0.87 V (vs. RHE), superior durability and good methanol tolerance.
- Publication:
-
Solid State Sciences
- Pub Date:
- December 2017
- DOI:
- 10.1016/j.solidstatesciences.2017.10.008
- Bibcode:
- 2017SSSci..74...56J
- Keywords:
-
- Oxygen reduction reactions;
- Electrocatalysts;
- Graphenes;
- Nickel