郑州大学臧双全团队设计合成了在整个湿度范围内对臭氧进行分解的锰有机框架。相关研究成果发表在2021年3月26日出版的《美国化学会杂志》。

臭氧（O₃）是危害人类健康和生态系统的主要大气污染物之一。然而，设计合成适用于空气成分广泛变化的，尤其是是水蒸气含量可变的的高性能O3消除催化剂仍然令人望而生畏。

该文中，研究人员报道了一种新的锰基金属有机框架，[Mn3（μ3-OH）2（TTPE）（H2O）4]·2H2O（H4TTPE=1,1,2,2-四（4-（2H-四唑-5-基）苯基）乙烷），表示为ZZU-281。ZZU-281催化O₃分解，从干燥（≤5%相对湿度（RH））到高湿度（90%相对湿度）的整个湿度范围内，工作效率几乎为100%。

研究人员发现Mn²⁺激活了可维持的配位水分子和OH基团，成为O₃向O₂转移的活性中心，活化能较低。ZZU-281独特的明渠、保水性和水稳定性进一步支持了其高催化性能。这为实际设计高效的O₃消除催化剂开辟了一条新的途径。

附：英文原文

Title: Ozone Decomposition by a Manganese-Organic Framework over the Entire Humidity Range

Author: Zhi-Bing Sun, Ya-Nan Si, Shu-Na Zhao, Qian-You Wang, Shuang-Quan Zang

Issue&Volume: March 26, 2021

Abstract: 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.

DOI: 10.1021/jacs.1c01027

Source: https://pubs.acs.org/doi/10.1021/jacs.1c01027