Exploring efficient noble metal‐free electrocatalysts is of significance for water electrolysis. In this work, we fabricated a high‐efficiency self‐supporting electrode with mesoporous FeP film coated on carbon cloth (meso‐FeP film/CC) for the hydrogen evolution reaction (HER). Compared with nanoparticle‐stacked disordered porous structure, the ordered mesoporous iron phosphide film exhibits high porosity as high as 2.3×10¹⁷ site per mg, as well as small pore size and uniform pore distribution, which enables the exposure of abundant active sites. Moreover, the self‐supporting structure with enhanced conductivity further optimizes its electrocatalytic performance towards the HER. As a result, the meso‐FeP film/CC displays a low overpotential (65 mV at current density of 10 mA cm⁻²) and a small Tafel slope (44 mV dec⁻¹) in acid condition, which is competitive among most of noble‐metal free electrocatalysts.

中文翻译：

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具有高孔隙率的自组装介孔FeP膜，用于有效的氢气释放反应

探索有效的无贵金属电催化剂对于水电解具有重要意义。在这项工作中，我们制造了一种高效的自支撑电极，在碳布上涂有介孔FeP膜（介观FeP膜/ CC）以进行放氢反应（HER）。与纳米颗粒堆积的无序多孔结构相比，有序介孔磷化铁膜具有高孔隙率，每毫克高达2.3×10 ^17个位点，并且孔径小且孔分布均匀，从而可以暴露出大量的活性位点。此外，具有增强电导率的自支撑结构进一步优化了其对HER的电催化性能。结果，中相FeP膜/ CC表现出低的过电势（电流密度为10 mA cm ^-2时为65 mV）和在酸性条件下的小Tafel斜率（44 mV dec ^-1），在大多数无金属贵金属电催化剂中具有竞争力。