Urea electrocatalytic oxidation afforded by renewable energies is highly promising to replace the sluggish oxygen evolution reaction in water splitting for hydrogen production while realizing the treatment of urea-rich waste water. Therefore, the development of efficient and cost-effective catalysts for water splitting assisted by urea is highly desirable. Herein, Sn-doped CoS₂ electrocatalysts were reported with the engineered electronic structure and the formation of Co-Sn dual active sites for urea oxidation reaction (UOR) and hydrogen evolution reaction (HER), respectively. Consequently, the number of active sites and the intrinsic activity were enhanced simultaneously and the resultant electrodes exhibited outstanding electrocatalytic activity with a very low potential of 1.301 V at 10 mA·cm⁻² for UOR and an overpotential of 132 mV at 10 mA·cm⁻² for HER. Therefore, a two-electrode device was assembled by employing Sn(2)-CoS₂/CC and Sn(5)-CoS₂/CC and the constructed cell required only 1.45 V to approach a current density of 10 mA·cm⁻² along with good durability for at least 95 h assisted by urea. More importantly, the assembled electrolyzer can be powered by commercial dry battery to generate numerous gas bubbles on the surface of the electrodes, demonstrating the high potential of the as-fabricated electrodes for applications in hydrogen production and pollutant treatment at a low-voltage electrical energy input.

由可再生能源提供的尿素电催化氧化非常有希望取代水分解制氢过程中缓慢的析氧反应，同时实现富含尿素废水的处理。因此，非常需要开发高效且具有成本效益的尿素辅助水分解催化剂。在此，报道了Sn 掺杂的 CoS _{2电催化剂具有工程电子结构和 Co-Sn 双活性位点的形成，分别用于尿素氧化反应 (UOR) 和析氢反应 (HER)。}因此，活性位点的数量和本征活性同时增加，所得电极表现出优异的电催化活性，在 10 mA·cm 时的电势非常低，仅为 1.301 V^{UOR 为-2} ， HER为10 mA·cm ^-2时的过电势为132 mV 。_{因此，采用 Sn(2)-CoS 2} /CC 和 Sn(5)-CoS ₂ /CC组装了双电极装置，构建的电池仅需要 1.45 V 即可达到 10 mA·cm ⁻²的电流密度以及至少 95 小时在尿素辅助下的良好耐久性。更重要的是，组装好的电解槽可以由商用干电池供电，在电极表面产生大量气泡，证明了所制造的电极在低压电能制氢和污染物处理方面的应用潜力巨大输入。