2021年11月25日 · 近日，中国科学技术大学江海龙教授（点击查看介绍）课题组提出了一种Zn辅助原子化策略(ZAAS)，成功将Fe和Ni单原子引入到MOF衍生的氮掺杂碳，构筑了具有近邻非成键Fe-Ni原子对 (single-atom pairs) 的 Fe 1-Ni 1-N-C中。首先通过静电相互作用将Fe掺杂ZnO (Fe-ZnO) 和Ni掺杂ZnO ...

2021年11月18日 · Here, comprehensive first-principles calculations of X-ray absorption near-edge structure (XANES) spectra of a series of Fe-based catalysts and battery electrodes, including FeO, Fe 2 O 3, Fe(OH) 2, FeOOH, FeAl 2 O 4, and MFeO 2 (M = Li, Na, or K), were performed to shed light on the issue by dissecting the dependence of XANES line shapes on ...

2023年4月1日 · To unveil the structural nature of the Fe centers of the catalysts for NO 3 RR, element-selective x-ray absorption fine structure (XAFS) spectroscopy including x-ray absorption near-edge structure (XANES) and extend x-ray absorption fine structure (EXAFS) at the Fe K-edge (1 s → 4p) was employed to explore the local atomic and geometric ...

2017年6月1日 · In the present paper we report the results of Fe K-edge X-ray absorption fine structure (XAFS) study of the local structure of BFN. We analyzed both the X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS), which contain information on the valence state, local symmetry of Fe atoms and the atomic ...

2021年2月18日 · In this study, a series of techniques, including X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS), and XAFS spectroscopy, were applied to Fe, Ni, and Ge in the iron meteorite NWA 859 to understand its crystallographic, chemical, and textural properties.

2024年7月8日 · MOFs具有不同的化学成分和结构组分可调控，有利于调节Fe、Co和Ni基MOFs电子能带结构，提升其OER催化性能。 本文通过共沉积法合成了二茂铁基MOFs（Ni-Fc MOFs）材料。

2016年4月29日 · X-ray absorption fine structure spectroscopy (XAFS) is a local probe, element-specific technique that provides the electronic nature and the local structure around the absorber atom. In this chapter, we present a brief introduction to XAFS technique, both in the near edge, X-ray absorption near-edge structure (XANES) and the extended X-ray ...

2012年7月5日 · In this paper, we use Fe K-edge XAFS spectroscopy to study Fe speciation and distribution in poorly crystalline minerals. XAFS spectroscopy analyzes two spectral regions: the X-ray absorption near-edge structure (XANES) and extended X …

2022年1月10日 · Basing on the closed π conjugated phthalocyanine-based intrinsic covalent organic polymers (COPs) with well-designed structures, we directly synthesized a series of atomically dispersed Fe-N-C ...

2015年12月10日 · In situ X-Ray Absorption Near Edge Spectroscopy (XANES) and Extended X-Ray Absorption Fine Structure (EXAFS) techniques are applied to a metal center ionic liquid undergoing oxidation and reduction in a three electrode spectroscopic cell.