Abstract
Few-layer exfoliated black phosphorus (Ex-BP) has attracted tremendous attention owing to its promising applications, including in electrocatalysis. However, it remains a challenge to directly use few-layer Ex-BP as oxygen-involved electrocatalyst because it is quite difficult to restrain structural degradation caused by spontaneous oxidation and keep it stable. Here, a robust carbon-stabilization strategy has been implemented to prepare carbon-coated Ex-BP/N-doped graphene nanosheet (Ex-BP/NGS@C) nanostructures at room temperature, which exhibit superior oxygen evolution reaction (OER) activity under alkaline conditions. Specifically, the as-synthesized Ex-BP/NGS@C hybrid presents a low overpotential of 257 mV at a current density of 10 mA cm−2 with a small Tafel slope of 52 mV dec−1 and shows high durability after long-term testing.
Highlights
Energy generation systems in modern industry mainly rely on the burning of fossil fuels, which causes environmental deterioration issues
To enhance the stability of exfoliated black phosphorus (Ex-black phosphorus (BP)), we introduced both a carbon coating layer and N-doped graphene sheets (NGS)
The whole process is performed in one-pot at room temperature
Summary
Energy generation systems in modern industry mainly rely on the burning of fossil fuels, which causes environmental deterioration issues. The development of new sustainable electrochemical energy technologies has received wide attention, among which the use of water electrolysis for hydrogen production has attracted much attention due to its efficient and clean energy source nature [1,2,3]. As a half reaction of electrocatalytic water splitting, the sluggish kinetics of the oxygen evolution reaction (OER) has become the most challenging issue that limits the efficiency of these electrochemical systems [4,5,6]. The Ir/Ru-based noble metal catalysts possess the best OER electrocatalytic activity, but the scarcity of these metals on Earth and consequent high-cost severely limit their practical application [7]. The development of highly efficient but more cost-effective noble metal-free electrocatalytic
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