The synergistic effect of non-noble-metal, low-cost, and high-performance hybrid electrocatalysts was often used for hydrogen evolution reaction (HER). Herein, the molybdenum disulfide nanoflakes were in situ grown on carbon microtube derived from natural tubular willow catkins as templates to construct the three-dimensional catkins/MoS₂ hybrids. Catkins/MoS₂ hybrids exhibited excellent HER activity in acidic conditions with a remarkable small onset overpotential of 50 mV, a Tafel slope of 62 mV decade^–1, a comparatively small overpotential of 136 mV at 10 mA cm^–2, and a Faraday yield of ∼100%. The as-synthesized catalysts also presented impressive durability and long-term stability. The superior electrocatalytic activity of catkins/MoS₂ hybrids resulted from the unique hybrid structure of the catkins microtube and MoS₂ nanoflakes providing abundant catalytically active sites and the annealed-catkins providing the good conductive support. The hybrids may find potential in practical hydrogen generation.

中文翻译：

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二硫化钼纳米薄片覆盖了碳化的卡特金微管杂化物，作为电化学制氢的优良催化剂

非贵金属，低成本和高性能的杂化电催化剂的协同效应通常用于析氢反应（HER）。在此，将二硫化钼纳米薄片原位生长在天然管状柳絮中作为模板的碳微管上，以构建三维柳絮/ MoS ₂杂种。卡特金斯/ MoS ₂杂化体在酸性条件下表现出出色的HER活性，具有50 mV的显着小过电位，Tafel斜率为62 mV·十进制^–1，在10 mA cm ^–2时具有136 mV的相对小过电位，法拉第产率约为100％。合成后的催化剂还具有令人印象深刻的耐久性和长期稳定性。柔cat素/ MoS ₂杂化物的优异的电催化活性是由于柔kin素微管和MoS ₂纳米薄片的独特杂化结构提供了丰富的催化活性位点，而退火的柔kin素提供了良好的导电支持。杂种可能会在实际制氢中发现潜力。