【摘要】 探索稳定高效的碱性析氢(HER)电催化剂对碱性条件下的电解水具有重要意义。通过水热反应和磷化/硒化工艺在碳布上原位生长了具有分级纳米阵列结构的Se-NiCoP/CC析氢催化剂。实验结果表明,Se掺杂可以增加Ni Co P的电化学活性位点,调节NiCoP的电子结构。优化后的Se-NiCoP/CC电极在碱性电解质中表现出优异的析氢催化活性,在10 mA/cm~2的电流密度下的过电位仅为79 m V。当将Se-NiCoP/CC电极同时作为碱性水电解槽的正极和负极时,在仅1.62 V的低电压下实现了50 mA/cm~2的电流密度。本工作为合理设计高活性HER电催化剂提供了一种可行的方法。更多还原

【Abstract】 The exploration of stable and highly efficient alkaline hydrogen evolution reaction(HER) electrocatalysts is imperative for alkaline water splitting. Herein, Se-doped NiCoP with hierarchical nanoarray structures directly grown on carbon cloth(Se-NiCoP/CC) was prepared by hydrothermal reaction and phosphorization/selenization process. The experimental results reveal that Se doping could increase the electrochemical active sites and alter the electronic structure of NiCoP. The optimized Se-NiCoP/CC electrode exhibits outstanding HER activity in alkaline electrolyte, which only needs a low overpotential of 79 mV at the current density of 10 mA/cm~2. When serving as anode and cathode electrode simultaneously, the Se-NiCoP/CC electrodes achieve current density of 50 mA/cm~2 at a low voltage of only 1.62 V. This work provides a feasible way to rationally design high active HER electrocatalysts.更多还原