Dinickel phosphide (Ni₂P), an efficient electrocatalyst derived from commonly available elements, shows a noteworthy performance in the hydrogen evolution reaction (HER). This research includes an extensive analysis using diverse characterization techniques, including scanning electron microscopy, transmission electron microscopy, energy dispersive spectrometry, X-ray diffraction, X-ray absorption spectroscopy (XAS), electron paramagnetic resonance (EPR), and in situ Raman spectroscopy, revealing the structural change of Ni₂P particles under a 100 or 400 mV overpotential during HER. Employing methods like Fourier transform infrared, in situ Raman spectroscopy, EPR, and XAS, the study uncovers structural and chemical changes. These include the emergence of nickel species, alterations in oxidation states, and the indication of Ni–O bond formation. Additionally, considerable morphological alterations in the particles are noted. These insights contribute to a deeper understanding of Ni₂P’s behavior and properties in HER conditions, shedding light on its catalytic efficiency and stability.

中文翻译：

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揭示磷化二镍 (Ni2P) 在析氢反应中的变化：更深入地了解机理

磷化二镍 (Ni ₂ P) 是一种源自常见元素的高效电催化剂，在析氢反应 (HER) 中表现出值得注意的性能。这项研究包括使用多种表征技术进行广泛的分析，包括扫描电子显微镜、透射电子显微镜、能量色散光谱、X 射线衍射、X 射线吸收光谱 (XAS)、电子顺磁共振 (EPR) 和原位拉曼光谱，揭示了HER 过程中 100 或 400 mV 过电势下Ni ₂ P 颗粒的结构变化。该研究采用傅里叶变换红外、原位拉曼光谱、EPR 和 XAS 等方法，揭示了结构和化学变化。这些包括镍物质的出现、氧化态的改变以及 Ni-O 键形成的迹象。此外，还注意到颗粒的相当大的形态变化。这些见解有助于更深入地了解 Ni ₂ P 在 HER 条件下的行为和性质，揭示其催化效率和稳定性。