2022年3月1日 · Herein, FeN 4-doped carbon nanotubes exhibit a remarkable catalytic activity towards the degradation of acid orange 7 (AO7) in the presence of peroxymonosulfate (PMS). This is accounted for by the abundant well-dispersed FeN4 …

2023年12月19日 · Here, FeN 4 active sites electronically coupled with PtFe alloys (PtFe-FeNC) were successfully prepared by a vapor deposition strategy as an ultralow Pt loading (0.64 wt %) hybrid electrocatalyst. The FeN 4 sites on the FeNC matrix are able to effectively anchor the PtFe alloys, thus inhibiting their aggregation during long-life cycling.

2021年5月13日 · Herein, we report a selective etching strategy to control the local nitrogen chemical states of single FeN 4 sites by adjusting the pyrolysis conditions, which can achieve the precise regulation of N species.

2024年5月17日 · In this study, we employ the chemical vapor modification method to alter the configuration of active sites from FeN 4 to the stable monosymmetric FeN 2 +N’ 2, along with enhancing the degree of...

2021年6月10日 · Herein, we overcome these limits by implementing chemical vapour deposition to synthesize Fe–N–C by flowing iron chloride vapour over a Zn–N–C substrate at 750 °C, leading to high-temperature...

2025年3月1日 · As demonstrated in scanning electron microscopy (SEM), the prepared FeN 4-SM appears as 3D defective spheres assembled by nanosheets (Fig. 2 b). The high-resolution transmission electron microscope (HRTEM) reveals that the introduction of 5-ATZ leads to the gradual appearance of holes and the eventual formation of pores in the prepared ...

2024年10月4日 · The macroporous films are thoroughly characterized by means of SEM, N2 sorption, XPS and Mercury Intrusion Porosimetry (MIP) and tested as ORR catalyst support for a model FeN4 active site in a Gas-Diffusion-Electrode (GDE) half-cell, which can operate at high current density conditions.

2019年11月15日 · 近日，纽约州立大学布法罗分校的武刚教授（点击查看介绍）研究团队以ZIF-8高温碳化后的氮掺杂碳（ZIF-NC）为基体，经Fe3+吸附和热活化过程制备了具有原子级分散FeN4活性中心的Fe-N-C催化剂，并借助该模型系统研究并揭示了高性能FeN4活性中心在热活化过程中的形成机理（图1）。 文章的共同第一作者为李加展、张寒光、Widitha Samarakoon 和单文涛。 美国的橡树林国家实验室Dave Cullen、俄勒冈州立大学冯振兴教授、匹兹堡大学王国峰教 …

碳基体中与氮(如FeN4)配位的铁单原子通常被认为是吸附O2和催化ORR动力学的真正活性位点。 通过原位掺杂和将含铁源封装到 ZIF-8纳米晶 中是制备FeN4位点和多孔纳米结构的典型方法。对于原位掺杂策略，额外的Fe离子，类似于Zn离子，也可以化学结合2-甲基咪唑配 ...

Fine tuning of the coordination structure of FeN 4 has an essential impact on the catalytic performance. Herein, we construct a sulfur-modified Fe–N–C catalyst with controllable local coordination environment, where the Fe is coordinated with four in-plane N …