Ozone Decomposition by a Manganese-Organic Framework over the Entire Humidity Range.
Ozone Decomposition by a Manganese-Organic Framework over the Entire Humidity Range.
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DOI：
10.1021/jacs.1c01027
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发表时间：
2021-03
影响因子：
15
通讯作者：
Zhibing Sun;Ya-Nan Si;Shu‐Na Zhao;Qian-You Wang;Shuangquan Zang
中科院分区：
文献类型：
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作者：
Zhibing Sun;Ya-Nan Si;Shu‐Na Zhao;Qian-You Wang;Shuangquan Zang
地面臭氧（O3）是危害人类健康和生态系统的主要空气污染物之一。然而，设计合成适用于广泛变化的空气成分，特别是可变水蒸气含量的高性能O3消除催化剂仍然令人望而生畏。本文报道了一种新的锰基金属有机骨架[Mn3(μ3-OH)2(TTPE)(H2O)4]·2H2O （H4TTPE = 1,1,2,2-tetrakis（4-（2h -tetrazol-5-基）phenyl）乙烷），编号为ZZU-281。在干燥（相对湿度≤5%）到高湿（90% RH）的整个湿度范围内，ZZU-281催化O3分解的工作效率几乎恒定为100%。我们发现可维持的配位水分子和OH基团被Mn2+激活，以低活化能成为O3转移到O2的活性位点。ZZU-281独特的开放通道、保水性和水稳定性进一步支持了其高催化性能。本研究为设计高效的O3去除催化剂开辟了一条新的途径。
Ground-level ozone (O3) is one of the main airborne pollutants detrimental to human health and ecosystems. However, the designed synthesis of high-performance O3 elimination catalysts suitable for broadly variable air compositions, especially a variable water vapor content, remains daunting. Herein, we report a new manganese-based metal organic framework, [Mn3(μ3-OH)2(TTPE)(H2O)4]·2H2O (H4TTPE = 1,1,2,2-tetrakis(4-(2H-tetrazol-5-yl)phenyl) ethane), denoted as ZZU-281. ZZU-281 catalyzes O3 decomposition with a nearly constant 100% working efficiency over the entire humidity range from dry (≤5% relative humidity (RH)) to high humidity (90% RH). We found that the maintainable coordinated water molecules and OH groups are activated by Mn2+, becoming active sites for O3 transfer to O2 with a low activation energy. The unique open channels, water retainability, and water stability of ZZU-281 further support the high catalytic performance. This work opens a new avenue for designing efficient catalysts for O3 elimination in practice.