电催化剂
电解质
介孔材料
催化作用
X射线光电子能谱
化学工程
材料科学
化学
电极
电化学
纳米技术
有机化学
工程类
物理化学
作者
Min Guo,Meijiao Xu,Quan Yuan,Chuan Hu,Puxuan Yan,Tayirjan Taylor Isimjan,Yuting Yang
标识
DOI:10.1016/j.apcatb.2021.120415
摘要
Developing high-efficient non-noble metal-based catalysts for oxygen reduction reaction (ORR) is an inevitable way to improve Zinc-air batteries' performance (ZAB). Herein, we report a Cu3P/MoP electrocatalyst (Cu3P/[email protected]) supported by hollow-porous-carbon nanospheres displaying high electrocatalytic activity and exceptional durability in alkaline media. The optimized ORR catalyst outperformed the benchmark Pt/C (20 wt%) and most recently reported Cu-/Mo-based catalysts in various aspects. X-ray photoelectron spectroscopy reveals that the excellent ORR performance originates from the charge transfer between of Cu3P and MoP species. Besides, the large specific surface area of Cu3P/[email protected] with mesoporous structure is particularly advantageous for the inner surface contact with electrolyte to accelerate ORR kinetics. Moreover, Cu3P/[email protected] also exhibits a large power density of 156 mW cm−2, a high round-trip efficiency, and superb stability over 231 h superior to Pt/C in the ZAB. This work offers a scalable and promising approach for the rational fabrication of hollow porous structure materials.
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