Chemistry - An Asian Journal · 2022 · 17 citations · 55 references
Natural SciencesChemical EngineeringMaterials ScienceElectrochemistryInterface ScienceNanomaterialsCatalyst DesignElectrode MaterialsHeterogeneous CatalysisMetal Oxide NanomaterialsNanostructured Energy MaterialsSupported CatalystsActive SitesBifunctional CatalystsCatalyst Active SitesElectrocatalystsElectronic ConductivityInterfacial EngineeringNitridingWater Splitting
Abstract It is still a challenge to realize the dream of a hydrogen‐based economy using a robust catalyst for overall water splitting. Here, we introduce two‐dimensional MoN/MoO 2 heterostructure nanosheets using nickel foam as a substrate for water splitting. The heterojunction formation was achieved through the partial nitriding of a Mo‐based precursor to MoN in the annealing process under NH 3 environment. The heterogeneous interface between MoN and MoO 2 as active sites is supposed to improve the surface reaction kinetics and electronic conductivity. Therefore, an excellent performance is achieved when MoN/MoO 2 is employed as both cathode and anode electrocatalysts; the corresponding cell voltages are 1.57 and 1.84 V at 10 and 100 mA cm −2 in 1 M KOH, respectively. The promising bifunctional catalytic performance of our catalyst opens up a new way for efficient electrochemical water splitting.
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