Oxygen-doped hollow, porous NiCoP nanocages derived from Ni–Co prussian blue analogs for oxygen evolution†
Abstract
An oxygen-doped, hollow, porous NiCoP nanocage (O–NiCoP Cages) electrocatalyst was synthesized derived from Ni–Co Prussian blue analogs. O–NiCoP Cages exhibited an overpotential of 310 mV at 10 mA cm−2 and a Tafel slope of 84 mV dec−1, significantly higher than that of undoped NiCoP nanocages, and also better than that of RuO2 and several reported phosphide electrocatalysts. This work provides a new strategy for the design of highly efficient oxygen evolution reaction (OER) electrocatalysts based on hollow, nanostructured and heteroatom-doped metal phosphides.