An efficient bifunctional catalyst for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is highly desired for the application of rechargeable metal air batteries. Herein, urchin-like CoP microspheres have been synthesized by a facile hydrothermal method with cetrimonium bromide as soft template. In alkaline solution, the as-prepared CoP catalyzes the ORR with an onset potential of −0.11 V (vs. Ag/AgCl) and a potential gap of 62 mV compared with commercial Pt/C catalyst. Meanwhile, the CoP catalyst exhibits better OER activities than the commercial RuO₂ catalyst. Interestingly, when employed as cathodic catalyst for Li-air batteries, the battery shows good discharge capacity of 2994 mAh g⁻¹ at 100 mA g⁻¹, high round-trip efficiency of over 90%, excellent rate capability and cycle stability of sustaining 80 cycles without any capacity degradation at a high discharge current density of 500 mA g⁻¹.

对于可再充电金属空气电池的应用，非常需要用于氧还原反应（ORR）和氧释放反应（OER）的高效双功能催化剂。在此，通过以溴化十六烷为软模板的简便水热法合成了顽童状的CoP微球。在碱性溶液中，与市售Pt / C催化剂相比，制备的CoP催化ORR的起始电势为-0.11 V（vs. Ag / AgCl），电势差为62 mV。同时，CoP催化剂显示出比市售RuO ₂催化剂更好的OER活性。有趣的是，当用作锂空气电池的阴极催化剂时，该电池在100 mA g ^-1下显示出2994 mAh g ^-1的良好放电容量在500 mA g ^-1的高放电电流密度下，具有90％以上的高往返效率，出色的倍率能力和维持80个循环的循环稳定性，而不会降低容量。