Comment on “Radical-mediated proton transfer enables hydroxyl radical formation in charge-delocalized water” by R. Zhao, Q. Zhang, N. Yang, L. Li, Z. Li and C. Cui, Chem. Sci., 2025, 16, 11954

Abstract

Cui and coworkers claim that H2+ and HO˙ are formed spontaneously by lowering the pH to below 4. This is thermodynamically most unlikely. Thus, proton transfer does not involve HO˙.

Graphical abstract: Comment on “Radical-mediated proton transfer enables hydroxyl radical formation in charge-delocalized water” by R. Zhao, Q. Zhang, N. Yang, L. Li, Z. Li and C. Cui, Chem. Sci., 2025, 16, 11954

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Article information

Article type
Comment
Submitted
19 Jul 2025
Accepted
24 Nov 2025
First published
08 Apr 2026
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2026, Advance Article

Comment on “Radical-mediated proton transfer enables hydroxyl radical formation in charge-delocalized water” by R. Zhao, Q. Zhang, N. Yang, L. Li, Z. Li and C. Cui, Chem. Sci., 2025, 16, 11954

W. H. Koppenol, Chem. Sci., 2026, Advance Article , DOI: 10.1039/D5SC05396J

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