Modulating Electronic Structure of Atomic Iron Catalyst by Metallic Cobalt Cooperation for Boosting Oxygen Reduction/Evolution Reactions in Rechargeable and Flexible Zinc-Air Battery
Modulating Electronic Structure of Atomic Iron Catalyst by Metallic Cobalt Cooperation for Boosting Oxygen Reduction/Evolution Reactions in Rechargeable and Flexible Zinc-Air Battery
研究概述
在多孔氮掺杂碳纳米纤维中结合金属Co与原子级Fe，利用Co供电子调节Fe d带中心及含氧中间体吸附，提升氧还原/析氧双功能活性，电位差0.72 V。液态锌空气电池峰值功率393 mW/cm²，比容量736 mAh/gZn。
谱图与表征信息
FIGURE 3 | (A) K‐edge XANES and (B) K‐edge Fourier transform‐EXAFS spectra for R space of Co–Co, Fe@NCNF‐900. (C) K‐edge XANES and (D) K‐edge Fourier transform‐EXAFS spectra for R space of Fe–Co, Fe@NCNF‐900. (E) Fitting curve of the EXAFS of Fe–Co, Fe@NCNF‐900 in R‐space (inset: matching curve tracings within the q‐space domain). (F) EXAFS K‐space adjustments for the Fe–Co, Fe@NCNF‐900 catalysts. Wavelet transforms EXAFS of (G) Co–Co, Fe@NCNF‐900 and (H) Fe–Co, Fe@NCNF‐900 catalysts with its corresponding reference samples. EXAFS, extended X‐ray absorption fine structure; XANES, X‐ray absorption near‐edge structure.