One-Step Synthesis of N, P-Codoped Carbon Nanosheets Encapsulated CoP Particles for Highly Efficient Oxygen Evolution Reaction
Yu‐Chuan Liu, Xu Guan, Baobing Huang, Qiao‐Hua Wei, Zailai Xie
Abstract
Oxygen electrocatalysis, especially oxygen evolution reaction (OER) is a central process during the actual application of continuous fuel cells and rechargeable metal-air battery. It is still challenging to develop ideal electrocatalyst to substitute the commercial noble metal-based materials. In this work, we have constructed a new material that CoP nanoparticles which are encapsulated by a biomolecule derived N, P-codoped carbon nanosheets via a simple and facile one-step strategy. The as-prepared material releases a high electrocatalytic activity and stability for OER, with an overpotential of 310 mV to achieve 10 mA/cm 2 in 1 M KOH. Importantly, we found that the phosphoric acid can not only introduce phosphorus dopant into 2D N-doped carbon nanosheets and play a role of porogen agent, but also participate in the formation of active center (cobalt phosphide).Moreover, the coverage of N, P-carbon can prevent the CoP nanoparticles from aggregation under the harsh reaction medium to achieve high and stable activity. We believe our strategy can offer a novel pathway to synthesize new transition metal based catalysts for electrocatalysis or other heterogeneous catalysis.