Hydrogen generation by water splitting in alkaline solution is a key candidate to product sustainable alternative energy in the 21st century. In this article, we fabricated the self-standing N-doped carbon nanotubes (CNTs) array encapsulated NiFe alloy nanoparticles (NPs) via facile solid-diffusion method as effective hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) electrocatalysts (NiFe/CNTs composites). As-prepared NiFe/CNTs-900 exhibited great electrocatalysis activity, with overpotentials of 149 ​mV for HER and 257 ​mV for OER to drive current density of 10 ​mA/cm², and also displayed superior electrochemical stability, which are mainly due to the synergistic effect between the bimetallic transition metals and N-doped carbon and the large number of active sites generated during the products preparation process.

通过在碱性溶液中分解水来制氢是21世纪生产可持续替代能源的关键候选人。在本文中，我们通过简便的固相扩散方法制备了自立的N掺杂碳纳米管（CNTs）阵列封装的NiFe合金纳米颗粒（NPs）作为有效的析氢反应（HER）和析氧反应（OER）电催化剂（NiFe / CNTs复合材料）。制备的NiFe / CNTs-900具有良好的电催化活性，HER的过电势为149 mV，OER的过电势为257 mV，驱动电流密度为10 mA / cm ²并且还显示出优异的电化学稳定性，这主要是由于双金属过渡金属与N掺杂碳之间的协同作用以及在产品制备过程中产生的大量活性位点。