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A residue-free approach to water disinfection using catalytic in situ generation of reactive oxygen species
Nature Catalysis ( IF 37.8 ) Pub Date : 2021-07-01 , DOI: 10.1038/s41929-021-00642-w
Thomas Richards , Jonathan H. Harrhy , Richard J. Lewis , Alexander G. R. Howe , Grzegorz M. Suldecki , Andrea Folli , David J. Morgan , Thomas E. Davies , E. Joel Loveridge , David A. Crole , Jennifer K. Edwards , Paul Gaskin , Christopher J. Kiely , Qian He , Damien M. Murphy , Jean-Yves Maillard , Simon J. Freakley , Graham J. Hutchings

Globally, water disinfection is reliant on chlorination, but requires a route that avoids the formation of chemical residues. Hydrogen peroxide, a broad-spectrum biocide, can offer such an alternative, but is typically less effective than traditional approaches to water remediation. Here, we show that the reactive oxygen species—which include hydroxyl, hydroperoxyl and superoxide radicals—formed over a AuPd catalyst during the synthesis of hydrogen peroxide from hydrogen and air are over 107 times more potent than an equivalent amount of preformed hydrogen peroxide and over 108 times more effective than chlorination under equivalent conditions. The key to bactericidal and virucidal efficacy is the radical flux that forms when hydrogen and oxygen are activated on the catalyst. This approach could form the basis of an alternative method for water disinfection, particularly in communities not currently served by traditional means of water remediation or where access to potable water is scarce.



中文翻译:

使用催化原位产生活性氧的无残留水消毒方法

在全球范围内,水消毒依赖于氯化,但需要避免形成化学残留物的途径。过氧化氢是一种广谱杀菌剂,可以提供这样的替代方案,但通常不如传统的水修复方法有效。在这里,我们表明,在由氢气和空气合成过氧化氢的过程中,在 AuPd 催化剂上形成的活性氧物质(包括羟基、氢过氧基和超氧自由基)比等量的预先形成的过氧化氢的效力高出10 7倍以上,并且超过 10 8在同等条件下比氯化更有效。杀菌和杀病毒功效的关键是氢和氧在催化剂上活化时形成的自由基通量。这种方法可以成为水消毒替代方法的基础,特别是在目前没有传统水修复方式或饮用水稀缺的社区。

更新日期:2021-07-01
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