Dual optimization for beaded iron diselenide/nickel diselenide–nitrogen‑doped carbon@ carbon nanofibers heterostructure electrocatalyst through structure design …
Dual optimization for beaded iron diselenide/nickel diselenide–nitrogen‑doped carbon@ carbon nanofibers heterostructure electrocatalyst through structure design …
研究概述
通过串珠结构及界面工程，将FeSe2/NiSe2–氮掺杂碳逐个固定在碳纳米纤维上，改善导电性并抑制金属聚集。整体水分解在10 mA/cm²下仅需1.63 V。XAS与计算表明额外不饱和Ni—Se配位有助于优化中间体吸附，促进*O向*OOH转化。
谱图与表征信息
Fig. 6. (a) Ni K-edge XANES of Ni foil, NiSe2-NC@CNF, and FeSe2/NiSe2-NC@CNF; (b) Ni K-edge EXAFS (R-space) of Ni foil, NiSe2-NC@CNF, and FeSe2/NiSe2- NC@CNF; (c) Ni K-edge EXAFS (K-space) of Ni foil, NiSe2-NC@CNF, and FeSe2/NiSe2-NC@CNF; (d–f) WT of Ni foil (d), NiSe2-NC@CNF (e), and FeSe2/NiSe2- NC@CNF (f).