The development of advanced nanomaterials with multifunctionalities is an intriguing and challenging approach for utilizing clean and sustainable energy. Herein, we demonstrate the construction of a unique hierarchically structured one-dimensional molybdenum phosphide (MoP) through an ionic liquid-assisted synthesis method. Further, encapsulating with an N, P-codoped carbon shell to form a hybrid multifunctional material (MoP/NPC) was performed for the supercapacitor and electrocatalysis. The as-synthesized MoP/NPC nanostructures possessed a large number of active sites and a shorter ionic diffusion length. As a proof-of-concept application, the symmetric all-solid-state supercapacitor device assembled using MoP/NPC delivers a superior-specific capacitance of 544 F g^–1 at 0.5 A g^–1, a high specific energy of 76 W h kg^–1 at a power density of 503 W kg^–1, and outstanding cycling stability. Moreover, MoP/NPC also displays excellent electrocatalytic activity and stability toward hydrogen evolution reaction in a wide pH range (0–14). This study demonstrates an effective strategy for developing transition-metal phosphide-based nanomaterials with outstanding electrochemical performance for future energy conversion and storage.

中文翻译：

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离子液体辅助高性能一维MoP / NPC分级合成超级电容器和电催化

具有多功能的先进纳米材料的开发是一种利用清洁和可持续能源的有趣且具有挑战性的方法。在这里，我们演示了通过离子液体辅助合成方法构建的独特的层次结构一维磷化钼（MoP）。此外，用超级电容器和电催化用N，P共掺杂的碳壳包封以形成混合多功能材料（MoP / NPC）。合成后的MoP / NPC纳米结构具有大量的活性位点和较短的离子扩散长度。作为概念验证应用，使用MoP / NPC组装的对称全固态超级电容器器件在0.5 A g ^{–1的情况下}可提供544 F g ^–1的卓越比电容。，在503 W kg ^–1的功率密度下具有76 W h kg ^–1的高比能，并具有出色的循环稳定性。此外，MoP / NPC在宽的pH范围（0–14）中也表现出出色的电催化活性和对析氢反应的稳定性。这项研究证明了开发具有优异电化学性能的过渡金属磷化物基纳米材料用于未来能量转换和存储的有效策略。