One-dimensional (1D) transition metal phosphides (TMPs) with large specific surface areas, high charge transfer efficiency and excellent electrical conductivity have attracted significant attention in hydrogen evolution reaction (HER) as versatile and active catalysts. Herein, the sub-4 nm Mo-Co2 P ultrafine nanorods (NRs) anchored on reduced graphene oxide (rGO) were successfully synthesized by a colloidal mesostructured strategy. Electrochemical test results reveal that the Mo-Co2 P@rGO electrode exhibits superior activity with overpotentials of 204 mV and Tafel slope of 88 mV/dec for HER at 10 mA/cm2 , relative to the Co2 P@rGO electrode in 0.5 M H2 SO4 solution. This improvement could be ascribed to the Mo doping, which results in more active sites, higher electrical conductivity and faster electron-transfer rates. This versatile strategy will provide a promising pathway for transition metal-doped compounds as an efficient catalyst.

中文翻译：

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超细 Mo 掺杂 Co2P 纳米棒锚定在还原氧化石墨烯上作为产氢反应的高效电催化剂

具有大比表面积、高电荷转移效率和优异导电性的一维 (1D) 过渡金属磷化物 (TMPs) 作为多功能和活性催化剂在析氢反应 (HER) 中引起了极大的关注。在此，通过胶体介观结构策略成功合成了锚定在还原氧化石墨烯 (rGO) 上的亚 4 nm Mo-Co2 P 超细纳米棒 (NRs)。电化学测试结果表明，相对于 Co2 P@rGO 电极，在 0.5 M H2 SO4 中，Mo-Co2 P@rGO 电极在 10 mA/cm2 时对 HER 的过电位为 204 mV，塔菲尔斜率为 88 mV/dec解决方案。这种改进可以归因于 Mo 掺杂，这导致更多的活性位点、更高的导电性和更快的电子转移速率。