Reduced graphene oxide supporting hollow bimetallic phosphide nanoparticle hybrids for electrocatalytic oxygen evolution

- Hollow CoNiP nanoparticles on rGO prepared by low temperature phosphorization
- This new nanohybrid material has high electrocatalytic activity towards OER in alkaline solution
- Highly OER activities own to synergistic effects between metals and rGO and the in situ formed active species

Nanohybrids with hollow CoNiP nanoparticles decorating reduced graphene oxide (h-CoNiP/rGO) are prepared by a low-temperature phosphorization method. The h-CoNiP/rGO present favorable electrocatalytic advantages toward the oxygen evolution reaction (OER) in alkaline solution, including an onset potential of 1.44 V, a low overpotential of 280 mV at a current density of 10 mA cm− 2, a small Tafel slope of 65.2 mV dec− 1, and pretty good durability. The use of earth-abundant elements in a high-activity OER electrocatalyst may provide an effective way of advancing the development of full water splitting.