A residue-free approach to water disinfection using catalytic in situ generation of reactive oxygen species

Richards, Thomas, Harrhy, Jonathan, Lewis, Richard, Howe, Alexander, Suldecki, Grzegorz, Folli, Andrea ORCID: https://orcid.org/0000-0001-8913-6606, Davies, Thomas, Loveridge, Joel, Crole, David, Edwards, Jennifer ORCID: https://orcid.org/0000-0003-4089-2827, Kiely, Christopher John ORCID: https://orcid.org/0000-0001-5412-0970, He, Qian ORCID: https://orcid.org/0000-0003-4891-3581, Murphy, Damien ORCID: https://orcid.org/0000-0002-5941-4879, Maillard, Jean-Yves ORCID: https://orcid.org/0000-0002-8617-9288, Freakley, Simon, Hutchings, Graham ORCID: https://orcid.org/0000-0001-8885-1560 and Morgan, David ORCID: https://orcid.org/0000-0002-6571-5731 2021. A residue-free approach to water disinfection using catalytic in situ generation of reactive oxygen species. Nature Catalysis 4 , pp. 575-585. 10.1038/s41929-021-00642-w

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Abstract

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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Biosciences Chemistry Pharmacy
Publisher:	Nature Research
ISSN:	2520-1158
Date of First Compliant Deposit:	21 June 2021
Date of Acceptance:	31 March 2021
Last Modified:	15 Apr 2024 17:09
URI:	https://orca.cardiff.ac.uk/id/eprint/140418

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