Hierarchical NiCo2S4 nanosheets grown on graphene to catalyze the oxygen evolution reaction
Source abstract
Abstract
Efficient transition metal-based electrocatalysts for oxygen evolution reaction (OER) are vital for water splitting to make H2 fuel. Here, the hierarchical NiCo2S4 nanosheets/reduced graphene oxide (NiCo2S4/RGO) architecture composite was designed and synthesized. The constitution and morphology of NiCo2S4/RGO composites were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscope and transmission electron microscope. Then, the electrochemical performance of as-prepared NiCo2S4/RGOs for OER was studied. The optimal composite (NiCo2S4/RGO-2) exhibited the best improved compared to raw NiCo2S4 on OER performance, which afforded a small overpotential (366 mV at current density of 10 mA cm−2) and a low Tafel slope of 65 mV dec−1 and good stability in 1.0 M KOH electrolyte. The hierarchical architecture of the NiCo2S4/RGO system endows more active sites and enhances charge transfer. This work provided a general strategy to design more efficient NiCo-based chalcogenide OER electrocatalysts.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Fuel Cells and Related Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (48)
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