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 V₃O_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 V₃O_x unit cluster higher and the distance of adjacent V₃O_x unit cluster smaller. More V⁵⁺ 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.

中文翻译：

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MIL-88B（V）和MIL-101（V）MOF对NH3选择性催化还原NO的催化性能

本文研究了水热合成的MIL‐88B（V）和MIL‐101（V）MOFs材料的SCR性能，以及MOFs材料的配位和空间拓扑对配位状态，化学状态和表面的影响讨论了V离子的性质以及与SCR催化的关系。结果表明，MIL-88B（V）的NO转化率可高达80％，而MIL-101（V）的NO转化率仅可达到20％，但两者的SCR反应选择性均非常好。MOFs材料的配位结构和空间拓扑结构对V离子的配位状态，化学状态和表面性质有很大影响，导致SCR催化性能不同。SCR的反应性能与V ₃的结构性质有关O _x单位并遵循E-R机制。MIL-88B（V）的交错和逐层紧密堆积的结构使V ₃ O _x单元簇的密度更高，相邻的V ₃ O _x单元簇的距离更小。更多的V ⁵⁺离子和V-O-V键可形成更多的布朗斯台德酸位，也有利于SCR反应的进行。尽管MIL‐88B（V）的高温稳定性不足，但其良好的SCR反应选择性和中低温SCR催化性能仍然可以在非电力工业中进行中低温工业脱硝。