Developing high-efficiency, low-cost, and durable bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is greatly desirable and challenging. Herein, a highly active and durable nitrogen-doped CoP coupled CeO₂ nanowire heterostructure (N-CoP/CeO₂) electrocatalyst is prepared on carbon cloth. The resultant N-CoP/CeO₂ exhibits superb catalytic activities for OER and HER, featuring low overpotentials of 215 and 74 mV at 10 mA cm^-2 in 1.0 M KOH. The N-CoP/CeO₂ assembled water electrolyzer has super stability, which needs relatively low cell voltages of 1.52 V@10 mA cm^-2 over 42 days (≈95.9% retention) and 1.80 V@400 mA cm^-2 over 21 days (≈94.4% retention), outperforming most reported cost-effective electrocatalysts. Theoretical calculations reveal that the metallic heterostructure interfaces of N-CoP/CeO₂ possess a fast electron transfer pathway, optimized adsorption/desorption process of reactive intermediates, and reduced reaction energetic barriers, thus enhancing the electrocatalytic activity. Additionally, the robust three-dimensional configuration and the oxygen vacancies-rich CeO₂ component in N-CoP/CeO₂ are regarded as significant contributors to improving stability and promoting long-term durability.

开发用于析氧反应 (OER) 和析氢反应 (HER) 的高效、低成本和耐用的双功能电催化剂是非常理想和具有挑战性的。在此，在碳布上制备了一种高活性和耐用的氮掺杂CoP偶联CeO ₂纳米线异质结构（N-CoP/CeO _{2 ）电催化剂。}所得的 N-CoP/CeO _{2对 OER 和 HER 表现出极好的催化活性，在 10 mA cm} ^-2和 1.0 M KOH 中具有 215 和 74 mV 的低过电势。N-CoP/CeO ₂组装水电解槽具有超稳定性，在42天内需要1.52 V@10 mA cm ^{-2的相对较低的电池电压（} ≈95.9% 保留）和 1.80 V@400 mA cm ^-2超过 21 天（≈ 94.4% 保留），优于大多数报道的具有成本效益的电催化剂。理论计算表明，N-CoP/CeO ₂的金属异质结构界面具有快速的电子转移途径，优化了反应中间体的吸附/解吸过程，降低了反应能垒，从而提高了电催化活性。此外， N-CoP/CeO ₂中稳健的三维构型和富含氧空位的 CeO ₂成分被认为是提高稳定性和促进长期耐久性的重要因素。