过氧二硫酸盐
催化作用
化学
双原子分子
吸附
X射线吸收精细结构
降级(电信)
电子顺磁共振
双酚A
电子转移
物理化学
光化学
无机化学
分子
有机化学
核磁共振
电信
物理
光谱学
量子力学
环氧树脂
计算机科学
作者
Xiaoping Li,Rongzhi Chen,Xinxin Long,Huanyu Chen,Meng Li,Yuxuan Du,Shengjiong Yang,Qian Zheng,Chen Yang,Dahu Ding
标识
DOI:10.1016/j.seppur.2023.124990
摘要
The application of catalysts with highly available active sites, such as single-atom catalysts (SACs), is a growing trend in peroxysulfate activation for organic contaminant degradation. However, the single functional active site of SACs limits its performance in such reactions involving multiple steps or reactants. For this issue, a Fe-Co diatomic catalyst (FeCo-N-C) with multi-functional active sites is synthesized to abate bisphenol A (BPA) using peroxydisulfate (PDS) as an oxidant. X-ray Absorption Fine Structure (XAFS) measurement confirms the successful construction of diatomic Fe-N4/Co-N4 sites. The FeCo-N-C exhibits a higher normalized reaction rate (2.07 × 105 min−1 mol−1) in BPA removal than previously reported SACs. Low-temperature electron paramagnetic resonance analysis reveals that Fe-N4 and Co-N4 process different intrinsic properties (spin states), which may lead to their diverse functions in the PDS activation process. The Co sites can significantly accelerate electron transfer and enhance the PDS adsorption abilities. As a complement, Fe sites perform better in the electrostatic interaction and destabilization of PDS. This study not only explains the synergy of multi-functional diatomic sites from the whole PDS activation process but provides a reliable reference for the elimination of emerging organic contaminants.
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