Interfacial Engineering of CoFe/CoCₓ Heterojunctions into Robust N-Doped Carbon Nanofibers Enables Exceptional Stability for Practical Rechargeable Zinc-Air
Interfacial Engineering of CoFe/CoCₓ Heterojunctions into Robust N-Doped Carbon Nanofibers Enables Exceptional Stability for Practical Rechargeable Zinc-Air
研究概述
将CoCx引入CoFe合金界面，并嵌入氮掺杂碳纳米纤维，利用界面电子调控和碳纤维结构加固提升氧还原/析氧双功能性能。催化剂ORR半波电位0.89 V；锌空气电池峰值功率密度331 mW/cm²，在10 mA/cm²下循环超过442小时。
谱图与表征信息
Fig. 3 Normalized K-edge XANES of (a) Fe-CoFe/CoCx@NC-900 and (b) Co-CoFe/CoCx@NC-900. K-edge FT-EXAFS in R- space of (c) Fe-CoFe/CoCx@NC-900 and d) Co-CoFe/CoCx@NC-900, alongside their respective metal foils, oxides, and phthalocyanine (MPc) counterparts as benchmarks. (e) Fitting curves of the EXAFS of Co-CoFe/CoCx@NC-900 in R-space (inset: matching curve within the q-space domain). (f) EXAFS in k space for the Co-CoFe/CoCx@NC-900 catalyst. (g,h) EXAFS wavelet transforms of Co/Fe-CoFe/CoCx@NC-900 catalyst with its corresponding reference samples.