开发地球上储量丰富的具有类Pt催化活性的析氢反应（HER）电催化剂对于绿色制氢具有重要意义。本文描述了一种新策略，通过Ni 2+插层MoO 3纳米带（NB）的氮化来构建由Mo 2 N和Ni 0.2 Mo 0.8 N组成的双相氮化物纳米带。Mo 2 N/Ni 0.2 Mo 0.8 N催化剂表现出优异的稳定性和在10 mA cm -2下26 mV的低过电势和31 mV dec -1的塔菲尔斜率在碱性电解液和模拟海水中，其性能与基准 Pt/C 催化剂相当或更好。优异的碱性HER特性归因于Mo 2 N/Ni 0.2 Mo 0.8 N异质结构，其含量可调且界面牢固，并且在氮化过程中没有金属Ni偏析和结构崩溃。密度泛函理论 (DFT) 计算和实验表明，具有强电子相互作用的Mo 2 N/Ni 0.2 Mo 0.8 N 界面可优化 H 吸附/解吸，产生具有正 ΔG H*的中等弱键合金属位点作为催化中心，从而加速 HER 动力学并提高 HER 活性。结果揭示了一种制备具有类似 Pt 析氢活性的异质结构氮化物基催化剂的简单策略。

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The development of earth-abundant electrocatalysts with Pt-like catalytic activity for the hydrogen evolution reaction (HER) is of great significance to green hydrogen production. Herein, a novel strategy is described to construct dual-phase nitride nanobelts composed of Mo2N and Ni0.2Mo0.8N by nitridation of Ni2+ intercalated layered MoO3 nanobelts (NBs). The Mo2N/Ni0.2Mo0.8N catalyst exhibits superior stability and a low overpotential of 26 mV at 10 mA cm−2 and Tafel slope of 31 mV dec−1 in both the alkaline electrolyte and simulated seawater, which is comparable to or better than that of the benchmark Pt/C catalyst. The excellent alkaline HER characteristics is attributed to the Mo2N/Ni0.2Mo0.8N heterostructure with adjustable content and robust interfaces and without metal Ni segregation and structure collapse during nitridation. Density-functional theory (DFT) calculations and experiments reveal that the Mo2N/Ni0.2Mo0.8N interface with strong electronic interactions optimizes H adsorption/desorption yielding moderately weak bonding metal sites with positive ΔGH* as the catalytic centers, thereby accelerating the HER kinetics and boosting the HER activity. The results reveal a simple strategy for the preparation of heterostructured nitride-based catalysts with Pt-like activity for hydrogen evolution.