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Al-Doped Ni2P nanosheet array: a superior and durable electrocatalyst for alkaline hydrogen evolution.

It is highly desired to develop high-efficiency and low-cost catalysts for the hydrogen evolution reaction (HER). Herein, we report the development of an Al-doped Ni2P nanosheet array on Ti mesh as a high-performance and durable electrocatalyst for the HER in 1.0 M KOH. Such a catalyst demands an overpotential of 129 mV to afford 10 mA cm-2 and maintains its catalytic activity for at least 20 h. This work offers us a promising cost-effective catalyst for large-scale electrolytic production of hydrogen fuels.