Molybdenum carbide (Mo₂C) is a promising electrocatalyst for hydrogen evolution reaction (HER) due to the similar electron orbital structure to platinum. Preparing Mo₂C catalyst in nanoscale increases the exposure of active catalyst site and significantly enhances electrochemical reaction and improve HER performance. However, Mo₂C is not a good electron conductor which still requires a more sufficient contact between the catalyst and electrode to transfer electron current. Here, we proposed in-situ Mo₂C growth on carbon nanotubes (CNTs) by using wet impregnation of ammonium molybdate tetrahydrate as Mo source, which established a crystalline transition contact between Mo₂C and CNTs and significantly improved HER performance. Our results further showed the optimized HER performance of Mo₂C@C_amt and achieved a lower Tafel slopes and low onset potential (η_onset) of 46.7 mV dec⁻¹, 51.3 mV dec⁻¹ and 73 mV and 127 mV (vs. RHE) under alkaline and acidic condition, respectively. Furthermore, Mo₂C@C_amt also shows less attenuation after 1000 times of cyclic voltammograms (CV) cycling stability test and 25 h continuous operation under alkaline and acidic condition.

由于与铂相似的电子轨道结构，碳化钼（Mo ₂ C）是一种有希望的氢释放反应（HER）电催化剂。纳米级制备Mo ₂ C催化剂可增加活性催化剂部位的暴露量，并显着增强电化学反应并改善HER性能。然而，Mo ₂ C并不是良好的电子导体，它仍然需要催化剂与电极之间更充分的接触来传递电子电流。在这里，我们建议通过湿法浸渍四水合钼酸铵作为Mo源，在碳纳米管（CNTs）上进行Mo ₂ C原位生长，从而在Mo ₂之间建立晶体过渡接触。C和CNT，大大改善了HER性能。我们的研究结果进一步表明优化HER沫的性能₂ Ç@ C_ _AMT和实现较低的塔菲尔斜率和低开始电位（η_发病46.7毫伏分解的）^-1，51.3毫伏癸^-1和73毫伏和127毫伏（相对于RHE）分别在碱性和酸性条件下。此外，Mo ₂ C @ C _amt在循环伏安（CV）循环稳定性测试的1000倍以及在碱性和酸性条件下连续运行25小时后，其衰减也较小。