Confinement pyrolysis of FeCo dual-single atoms electrocatalyst for significantly boosting oxygen reduction reaction and rechargeable Zn-air battery

• Published in: Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2023-12, Vol.679, p.132567, Article 132567
• Main Authors: Huang, Zheng-Xiong, Wu, Dong-Hui, Chen, Meng-Ting, Feng, Jiu-Ju, Wang, Ai-Jun
• Format: Article
• Language: English
• Subjects: Confinement pyrolysis; Dual-single atoms catalyst; Mesoporous carbon spheres; Oxygen reduction reaction; Zinc-air battery
• ISSN: 0927-7757; 1873-4359
• DOI: 10.1016/j.colsurfa.2023.132567

To address the energy crisis, it is critical to pursuit economic, high-energy density and stable electrocatalysts for oxygen reduction reaction (ORR). Herein, N,P-codoped hollow mesoporous carbon spheres supported FeCo dual-single atoms (FeCo-N,P-HCS) are synthesized via one-step confinement pyrolysis of the mixed metal salts, hollow mesoporous carbon spheres and dicyandiamide. Impressively, the gained FeCo-N,P-HCS exhibited a positive onset potential (Eonset = 1.01V) and half wave potential (E1/2 = 0.85V) in a 0.1M KOH electrolyte, revealing the superior ORR characteristics. Later on, the FeCo-N,P-HCS assembled Zn-air battery displayed an open circuit voltage of 1.491V, a high power density of 140mWcm-2 and great cyclic stability over the Pt/C + RuO2 based counterpart. This research affords some constructive insights for searching high-efficiency catalyst in relevant energy reserves and conversion fields. [Display omitted]