In pursuit of efficient water-splitting technologies, the development of high-performing electrocatalysts is crucial, particularly for the hydrogen evolution reaction (HER). In addition, it is paramount to adopt cost-effective approaches that leverage earth-abundant metals, together with scalable synthesis methods. In this study, we introduce a synthesis approach that combines a facile solution corrosion technique with plasma modification, thereby enhancing the hydrogen evolution activity of NiMo alloys. The inclusion of NH₃ plasma modification plays a dual role by concurrently reducing and nitriding as-synthesized NiMo hydroxide. The treatment results in a significant reduction in the HER overpotential to 95 mV at 10 mA/cm² compared to its initial overpotential. This improvement is attributed to enhanced kinetics due to substantial reductions in charge transfer resistance and an increased double-layer capacitance. Furthermore, the catalyst demonstrates excellent stability of close to 120 h, thereby highlighting the potential of this synthesis method for large-area synthesis of HER electrocatalysts.

中文翻译：

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通过等离子体改性提高溶液腐蚀NiMo的析氢反应性能

为了追求高效的水分解技术，高性能电催化剂的开发至关重要，特别是对于析氢反应（HER）。此外，采用具有成本效益的方法，利用地球上丰富的金属，以及可扩展的合成方法，这一点至关重要。在这项研究中，我们介绍了一种将简便的溶液腐蚀技术与等离子体改性相结合的合成方法，从而增强了 NiMo 合金的析氢活性。 NH ₃等离子体改性的包含通过同时还原和氮化合成的NiMo氢氧化物而发挥双重作用。与初始过电势相比，治疗导致 10 mA/cm ²下 HER 过电势显着降低至 95 mV。这种改进归因于电荷转移电阻的大幅降低和双层电容的增加而增强的动力学。此外，该催化剂表现出接近120小时的优异稳定性，从而凸显了该合成方法在大面积合成HER电催化剂方面的潜力。