High-efficiency oxygen electrocatalyst for Zn-air batteries on CoMn alloy encapsulated in N-doped carbon architectures

A low-cost efficient electrocatalyst for both oxygen reduction reaction (ORR) and evolution (OER) is urgently required the commercialization of Zn-air batteries. Herein, CoMn nanoalloys encapsulated in nitrogen-doped hollow carbon architectures (CoMn@NHC) as dual electrocatalysts batteries were developed successfully. The obtained CoMn@NHC nanohybrid expresses excellent electrocatalytic performances ORR (E1/2 = 0.87 V) OER (Ei=10 1.51 V). More encouragingly, a homemade aqueous battery using catalyst delivers larger peak power density 92.3 mW cm−2 stability nearly 300 h, outperforming commercial Pt/C + RuO2. remarkable are owing to unique microstructure synergistic effect between alloy N-doped substrate. This study opens new way designing high-efficient bifunctional application renewable energy facilities.