Hollow mesoporous metal-nitrogen-carbon electrocatalysts with enhanced oxygen reduction activity for zinc-air batteries.

• Tác giả: Yuanqing Deng, Zebing Feng, Wending Li, Ximei Lv, Yang Yang, Fengjiao Yu, Xinxin Yu
• Ngôn ngữ: eng
• Ký hiệu phân loại: 070.48346 Journalism
• Thông tin xuất bản: United States : Journal of colloid and interface science , 2025
• Bộ sưu tập: NCBI
• ID: 702521
• Chủ đề: 1. Hollow; 2. Mesoporous; 3. Metal

Tóm tắt

While great advances have been achieved in Zn-air batteries, porous cathode catalysts remain crucial and challenging to promote diffusion and boost oxygen reduction reaction (ORR). Herein, an effective strategy has been developed for the synthesis of hollow metal-nitrogen-carbon electrocatalysts to achieve the macro-/meso-/microporous structure. The h-CuNC electrocatalyst exhibits good stability and high ORR activity with a half-wave potential of 0.91 V. Theoretical calculations reveal that CuNC sites can reduce the energy barrier of *OOH adsorption, which is the rate-determining step. Zn-air battery with h-CuNC as the cathode catalyst enables high peak power density of 201 mW cm