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Reduction of O2 to H2O2 using Small Polycyclic Molecules

preprint
revised on 08.02.2021, 21:06 and posted on 10.02.2021, 05:52 by Kristal Lopez, Michael Groves
Hydrogen peroxide is an environmentally friendly oxidizing agent that is important in several industries. It is currently produced industrially via the anthrahydroquinone (AHQ) process where O2 reacts with a functionalised version of anthrahydroquinone to produce H2O2 and anthraquinone. In the previously published DFT pathway for this process the transition of the OOH? radical across the partially dehydrogenated AHQ catalyst was not explored. In this paper, we will use DFT to explore this step and show that there is a deep potential energy minimum that inhibits the OOH. from being fully reduced. We then examine other similar sized polycyclic molecules with two OH-groups on the same side that could serve as alternative catalysts without this issue. In this analysis, we identify Phenanthraquinone as a possible alternative and present the pathway for this candidate to produce H2O2 as well as its regeneration with H2.

History

Email Address of Submitting Author

mgroves@fullerton.edu

Institution

California State University Fullerton

Country

United States of America

ORCID For Submitting Author

0000-0002-1369-4596

Declaration of Conflict of Interest

no conflict of interest

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