Molybdenum phosphide (MoP) has received increasing attention due to its high catalytic activity in hydrogen evolution reaction (HER). However, it remains difficult to construct well‐defined MoP nanostructures with large density of active sites and high intrinsic activity. Here, a facile and general method is reported to synthesize an MoP/carbon nanotube (CNT) hybrid featuring small‐sized and well‐crystallized MoP nanoparticles uniformly coated on the sidewalls of multiwalled CNT. The MoP/CNT hybrid exhibits impressive HER activities in pH‐universal electrolytes, and requires the overpotentials as low as 83, 102, and 86 mV to achieve a cathodic current density of 10 mA cm⁻² in acidic 0.5 m H₂SO₄, neutral 1 m phosphate buffer solution, and alkaline 1 m KOH electrolytes, respectively. It is found that the crystallinity of MoP has significant influence on HER activity. This study provides a new design strategy to construct MoP nanostructures for optimizing its catalytic performance.

中文翻译：

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磷钼/碳纳米管杂化物作为pH通用的氢发生反应的电催化剂

磷化钼（MoP）由于其在析氢反应（HER）中的高催化活性而受到越来越多的关注。然而，仍然难以构建具有高活性位点密度和高内在活性的明确定义的MoP纳米结构。在这里，据报道一种简便而通用的方法来合成MoP /碳纳米管（CNT）杂物，该杂物具有均匀地涂覆在多壁CNT侧壁上的小尺寸且结晶良好的MoP纳米颗粒。MoP / CNT杂化物在pH通用电解质中具有令人印象深刻的HER活性，并且要求低电势低至83、102和86 mV，才能在0.5 m H ₂ SO ₄酸性条件下实现10 mA cm ^-2的阴极电流密度，中立1 m磷酸盐缓冲溶液和碱性1 m KOH电解质。发现MoP的结晶度对HER活性具有显着影响。这项研究提供了一种新的设计策略来构建MoP纳米结构，以优化其催化性能。