Hollow cobalt-nickel phosphide nanocages for efficient electrochemical overall water splitting

Abstract

A low-cost, highly efficient and strong durable bifunctional electrocatalyst is crucial for electrochemical overall water splitting. In this paper, a self-templated strategy combined with in-situ phosphorization is applied to construct hollow structured bimetallic cobalt-nickel phosphide (CoN-iP x) nanocages. Owing to their unique hollow structure and bimetallic synergistic effects, the as-synthesized CoNiP x hollow nanocages exhibit a high electrocatalytic activity and stability towards hydrogen evolution reaction in all-pH electrolyte and a remarkable electrochemical performance for oxygen evolution reaction in 1.0 mol L −1 KOH. Meanwhile, with the bifunctional electrocatalyst in both anode and cathode for overall water splitting, a low voltage of 1.61 V and superior stability are achieved at a current density of 20 mA cm −2 .

Bimetal phosphide as high efficiency and stable bifunctional electrocatalysts for hydrogen and oxygen evolution reaction in alkaline solution

“…Furthermore, the peak with binding energy at about 853.7 eV is ascribed to the Ni–P bond. 26,27 The XPS result corresponds well to the XRD of the sample, which further illustrates the successful synthesis of CoNiP.…”

Atmospheric‐Temperature Chain Reaction towards Ultrathin Non‐Crystal‐Phase Construction for Highly Efficient Water Splitting

“…Amorphous Fe(OH) 3 on catalysts with appropriate thickness can improve the contact between the catalyst and electrolyte, promoting nano‐interface exposure for improved catalytical activity. [ 11c,d,15b,17c,d] …”

Vanadium-Doping and Interface Engineering for Synergistically Enhanced Electrochemical Overall Water Splitting and Urea Electrolysis

“…With the depletion of fossil fuels and serious environmental concerns arising, enormous endeavors have been devoted to exploring sustainable and carbon-free emission energies. , Hydrogen energy, possessing the virtues of high energy density and pollution-free property, has been regarded as an alternative to traditional fossil fuels for energy conversion, storage, and utilization. , In contrast to major industrial technologies for hydrogen production, such as coal gasification and steam reforming, electrocatalytic water splitting driven by sustainable energy sources (e.g., wind power, solar power, tidal power, etc.) has been recognized as an eco-friendly sustainable approach .…”