【Electrochimica Acta】Plasma-assisted synthesis of hierarchical NiCoxPy nanosheets as robust and stable electrocatalyst for hydrogen evolution reaction in both acidic and alkaline media
作者：Shuyi Song, Mingjing Guo, Shasha Zhang, KeZhan, YaYan, Junhe Yang, Bin Zhao, Ming Xu
關(guān)鍵字：NiCoxPy nanosheets, Hierarchical, Plasma-assisted synthesis, HER
論文來源：期刊
發(fā)表時間：2020年
Transition metal phosphides are emerging non-noble metal electrocatalysts for hydrogen evolution reaction (HER) in water splitting. Herein, porous nickel cobalt phosphide nanosheet arrays with hierarchical structure were synthesized on carbon cloth (NiCoxPy-P/CC) as a robust and stable HER electrocatalyst by a facile approach involving electrodeposition and an effective PH3 plasma-assisted phosphorization. Owing to the unique structure with porous nanosheets composed of defect-abundant fine nanocrystals, the as-synthesized NiCoxPy/CC electrocatalyst demonstrates superior catalytic activity for HER to its thermally-phosphorized counterpart. Only at the overpotential as low as 70 (in 0.5?M?H2SO4) and 42?mV (in 1?M KOH), the current density of 10?mA/cm2 is achieved for the NiCoxPy/CC, which is among the best reported values for metal phosphide electrocatalysts. Moreover, the catalyst shows satisfying long-term durability up to 24?h in both the acidic and alkaline media. The outstanding HER performance and efficient synthesis strategy for the NiCoxP-P/CC makes it a promising electrocatalyst for hydrogen production.
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