NiCo₂O₄ nanoarray on CNT sponge: a bifunctional oxygen electrode material for rechargeable Zn-air batteries.

ABSTRACT: Ni- and Co-based materials have of late gained prominence over conventional noble metal-based ones as catalysts for energy devices. Here, a high performance catalyst which can facilitate both the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) was developed by anchoring a NiCo₂O₄ nanowire array on a carbon nanotube sponge (NCS). The three-dimensional morphology of NCS ensured efficient transport of the reactants and products on the catalyst surface, thereby improving the activity of the material. The prepared catalyst showed remarkable OER activity, requiring an overpotential of 280 mV, which is comparable to that of noble-metal catalysts. In addition to the noteworthy OER performance, the catalyst performed well with respect to the ORR. The total

SUBMITTER: Gangadharan PK 

PROVIDER: S-EPMC9417161 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature