催化作用
选择性催化还原
选择性
离子
布朗斯特德-洛瑞酸碱理论
星团(航天器)
拓扑(电路)
材料科学
热液循环
水热合成
化学
化学工程
纳米技术
有机化学
数学
组合数学
计算机科学
工程类
程序设计语言
作者
Shengchen Li,Yumei Zhai,Xiaxia Wei,Zhe Zhang,Xiangfei Kong,Fangqiong Tang
出处
期刊:Chemcatchem
[Wiley]
日期:2020-12-14
卷期号:13 (3): 940-951
被引量:7
标识
DOI:10.1002/cctc.202001622
摘要
Abstract In this paper, the SCR properties of MIL‐88B(V) and MIL‐101(V) MOFs materials by hydrothermal synthesis were investigated, and the effect of the coordination and spatial topology of MOFs materials on the coordination state, chemical state and surface properties of V ions, as well as the relationship with SCR catalysis, were discussed. The results showed that the NO conversion of MIL‐88B(V) can be as high as 80 %, while those of MIL‐101(V) can only reach to 20 %, but the SCR reaction selectivity of both were excellent. The coordination structure and spatial topological structure of MOFs materials had a great influence on the coordination state, chemical state and surface properties of V ions, resulting in different SCR catalytic performance. The reaction performance of SCR was related to the structural properties of V 3 O x units and followed the E‐R mechanism. The staggered and layer upon layer close‐packed structure of MIL‐88B(V) made the density of V 3 O x unit cluster higher and the distance of adjacent V 3 O x unit cluster smaller. More V 5+ ions and V−O−V bonds can form more Brønsted acid sites, also was conducive to the progress of the SCR reaction. Although MIL‐88B(V) has insufficient high temperature stability, but its good SCR reaction selectivity and SCR catalytic performance at medium and low temperature can still have the application prospect of medium and low temperature industrial denitration in non‐electric industries.
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