The renewable energy utilization largely relies on the development of highly efficient energy conversion devices including metal-air batteries and water electrolyzers. Currently, it is crucial yet challenging to explore multifunctional nonprecious electrocatalysts with high activity toward oxygen and hydrogen electrodes. Herein, unique donut-shaped hybrid nanostructure composed of interconnected CoP nanoparticles within P, N co-doped carbon matrix (denoted as [email protected]) was successfully fabricated through a supramolecular assisted one-pot strategy. Thanks to the unique morphology and modulated composition, the [email protected] manifested excellent universal electrocatalytic activity for both oxygen and hydrogen electrodes, where a small potential gap of 0.781 V (ΔE=E_j10-E_1/2) between ORR and OER and a low overpotential of 173 and 160 mV to reach the current density of 10 mA cm^-2 in 1 M KOH and 0.5 M H₂SO₄ for HER can be achieved. The [email protected] based Zn-air battery could provide an impressive peak power density of 138.57 mW cm^-2, and more importantly, a prominent charge/discharge stability after 150 h/350 cycles under a current density of 30 mA cm^-2, demonstrating its feasibility as cathode electrocatalyst for rechargeable Zn-air batteries. More importantly, a proof-of-concept system integrating Zn-air battery powered water splitting was further built to achieve cost-effective H₂ production.

可再生能源的利用在很大程度上取决于开发高效的能量转换设备，包括金属空气电池和水电解槽。当前，探索对氧气和氢气电极具有高活性的多功能非贵金属电催化剂至关重要但又充满挑战。本文中，通过超分子辅助一锅策略成功地制造了由P，N共掺杂碳基质（表示为[email protected]）中相互连接的CoP纳米颗粒组成的独特的甜甜圈形杂化纳米结构。由于独特的形态学和调制的组合物中，[电子邮件保护]两个氧和氢电极，表现优异的通用的电催化活性，其中0.781 V的小的电位间隙（Δ E =È _J10 -E在ORR和OER之间的_1/2）以及在HER的1 M KOH和0.5 MH ₂ SO _4中达到173和160 mV的低过电位以达到10 mA cm ^-2的电流密度。[受电子邮件保护]的Zn-空气电池可以提供138.57 mW cm ^-2的惊人峰值功率密度，更重要的是，在30 mA cm ^-2的电流密度下150 h / 350次循环后，其显着的充电/放电稳定性，证明了其作为可再充电Zn-空气电池的阴极电催化剂的可行性。更重要的是，还建立了一个概念验证系统，该系统集成了由锌-空气电池供电的水分解装置，以实现具有成本效益的H ₂生产。