One-Step Synthesis of N, P-Codoped Carbon Nanosheets Encapsulated CoP Particles for Highly Efficient Oxygen Evolution Reaction

Abstract

Oxygen electrocatalysis, especially oxygen evolution reaction (OER), is a central process during the actual application of rechargeable metal-air battery. It is still challenging to develop ideal electrocatalysts to substitute the commercial noble metal-based materials. In this work, we have constructed a new material, 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 pore-forming agent, but also participate in the formation of active center (cobalt phosphide). Moreover, the coverage of N, P-doped carbon can prevent the CoP nanoparticles from corrosion under the harsh reaction medium to achieve high and stable activity. We believe that our strategy can offer a novel pathway to synthesize new transition metal-based catalysts for electrocatalysis or other heterogeneous catalysis.

Mild and Efficient Heterogeneous Hydrogenation of Nitroarenes Facilitated by a Pyrolytically Activated Dinuclear Ni(II)-Ce(III) Diimine Complex

“…A recent publication on a thermally activated, PPh 3 -functionalized cobalt corrole that proved very effective in the heterogeneous nitroarene-to-aniline hydrogenation expanded the application range of this versatile macrocyclic compound class ( Figure 1 b) [ 86 ]. As was to be expected, the extra axial phosphine ligand permitted a brisk access to N , P -co-doped solid catalysts in which the incorporated P atoms significantly improved the redox properties of the material [ 87 , 88 , 89 , 90 , 91 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 , 102 , 103 , 104 , 105 , 106 ].…”

Metal-Free Pyrene-Based Conjugated Microporous Polymer Catalyst Bearing N- and S-Sites for Photoelectrochemical Oxygen Evolution Reaction

“…So far a wide variety of materials have been explored as a catalyst for OER under visible and ultraviolet irradiation. Several nanostructured metal oxides, mixed metal oxides, perovskite, heteroelement doped porous carbons (Liu et al, 2020), etc. showed interesting results.…”

Facile Synthesis of Carbon Cloth Supported Cobalt Carbonate Hydroxide Hydrate Nanoarrays for Highly Efficient Oxygen Evolution Reaction

“…However, OER suffers from sluggish kinetics owing to four electron transfer process, which significantly increases the overpotential. (Fu et al, 2018;Xiao et al, 2019;Liu et al, 2020). To facilitate the OER, the noble metal-based materials like IrO 2 and RuO 2 have been regarded as highly active catalysts for the OER.…”