N 1s and Fe 2p high-resolution XPS spectra of FeNC-500-12 (a, b) …
In situ (isotope-labeled) Raman spectroscopy of a molecular Fe phthalocyanine model catalyst and a pyrolytic Fe-N-C catalyst has shown that besides the single-atom Fe-N x sites, two C-N sites...
Controlling active sites of Fe–N–C electrocatalysts for oxygen ...
2020年12月1日 · In situ XAFS analysis revealed that Fe–N 4 sites are catalytically efficient sites. The electrochemical oxygen reduction reaction (ORR) is a critical reaction in many energy conversion and storage systems, including fuel cells and metal–air batteries.
Ultra-high surface area graphitic Fe-N-C nanospheres with single …
2018年12月1日 · Herein, we report a highly efficient Fe-N-C oxygen redox catalyst derived from a new class of Fe coordinated bis (imino)-pyridine ligand based polymer synthesized via Schiff base condensation between 2,6-diacetylpyridine and 1,8-diaminonaphthalene.
Template-free modulation of MOF-derived atomically dispersed Fe-N-C …
2025年1月1日 · The XRD results correlate with the observed morphology, where the sample with the most intense carbon peak (FeNC-Im4) displayed a more defined particle structure. Rietveld analysis enabled quantification of the phase composition, revealing FeNC-Im4 to possess the highest Fe content (7.7%) and uniquely, metallic Fe (3.5%).
Nature子刊：探究Fe-N-C电催化剂中的活性位点，吡啶基Fe-N4大 …
2020年10月22日 · 近日，麻省理工学院（MIT）的Yogesh Surendranath（通讯作者）等人报道了一种含有吡啶基六氮杂环的分子复合物—— (phen 2 N 2 )Fe。 作者比较了 (phen 2 N 2 )Fe、典型Fe-N-C材料和典型吡咯Fe大环用于ORR时的光谱、电化学和催化性能的差异。 其中， (phen 2 N 2 )Fe的N 1s XPS和XAS特征与Fe-N-C材料的特征非常相似。 同时，通过电化学研究发现， (phen 2 N 2 )Fe具有相对较高的Fe (III/II)电势，其ORR起始电势在Fe-N-C的150 mV范围内。 不同于吡 …
Active Site Identification in FeNC Catalysts and Their Assignment …
2021年1月18日 · FeNC catalysts are the most promising substitutes for Pt-based catalysts for the oxygen reduction reaction in proton exchange fuel cells. However, it remains unclear which FeN 4 moieties contribute to the reaction mechanism and in which way.
Fe N C Electrocatalysts with Densely Accessible Fe N4 Sites for ...
2021年6月17日 · The elemental information on the FeNC- and Fe N C/MA-surfaces was obtained from X-ray photoelectron spectroscopy (XPS). The XPS survey spectra confirmed the existence of C, N, and Fe in the FeNC and Fe N C/MA (Figure S10a, Supporting Information).
Angew：调控Fe–N–C第二配位层揭示活性氧中间体用于选择性需氧 …
2024年7月10日 · 通过模拟天然细胞色素P450酶含硫配体在氧气活化过程中会产生高活性结合态ROS的特征，制备得到第二配位层硫功能化的FeN4单原子纳米酶（FeNSC）以及对比样FeN4单原子纳米酶（FeNC）。
XPS patterns for FeNC-2-0.45Fe, 0.5Fe, 0.55Fe: (a–c) Fe 2p; (d–f) N …
Download scientific diagram | XPS patterns for FeNC-2-0.45Fe, 0.5Fe, 0.55Fe: (a–c) Fe 2p; (d–f) N 1s; and (g–i) C 1s from publication: Synthesis of hierarchically structured Fe 3 C/CNTs...
a) High‐resolution N 1s XPS spectra of FeNC, FeS/FeNSC‐1, …
In the current study, eight one‐dimensional (1D) nickel‐based salicylic acid (SA) complexes, Ni‐XSAs (X = pH, p Me, p MeO, m Me, p Br, p Cl, p F, and p CF 3 ), are prepared by ligand engineering....