What is it about?
We successfully introduced photoexcited oxygen vacancies (OVs) into Co3O4 catalysts for promoted chlorite activation. OVs act as “traps” by modulating electronic structures, thereby anchoring O atoms of chlorite and inducing O–Cl cleavage. The electrons near the OV-adjacent Co atom were reassigned after O atom transfer, subsequently facilitating the generation of heterogeneous high-valent cobalt-oxo (≡Co(IV)=O).
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Why is it important?
The transition metal oxide–activated chlorite process can achieve selective oxidation of organic pollutants by synchronously generating heterogeneous high-valent metal-oxo species and chlorine dioxide. However, heterogeneous high-valent metal-oxo species differ from homogeneous ones in chemical speciation and evolution mechanisms, which are commonly conflated together. The revealed oxygen-atom trapping effect will help us revisit the evolution mechanism of surface reactive species in heterogeneous oxidation techniques.
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This page is a summary of: Utilizing the oxygen-atom trapping effect of Co
3
O
4
with oxygen vacancies to promote chlorite activation for water decontamination, Proceedings of the National Academy of Sciences, March 2024, Proceedings of the National Academy of Sciences,
DOI: 10.1073/pnas.2319427121.
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