General Observation of Photocatalytic Oxygen Reduction to Hydrogen Peroxide by Organic Semiconductor Thin Films and Colloidal Crystals

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Gryszel M, Sytnyk M, Jakesova M, Romanazzi G, Gabrielsson R, Heiß W, Glowacki ED
Zeitschrift: ACS Applied Materials and Interfaces
Verlag: American Chemical Society
Jahr der Veröffentlichung: 2018
Band: 10
Heftnummer: 16
Seitenbereich: 13253-13257
ISSN: 1944-8244
Sprache: Englisch


Abstract

Low-cost semiconductor
photocatalysts offer unique possibilities for industrial chemical
transformations and energy conversion applications. We report that a
range of organic semiconductors are capable of efficient photocatalytic oxygen reduction to H2O2 in aqueous conditions. These semiconductors, in the form of thin films, support a 2-electron/2-proton redox cycle involving photoreduction of dissolved O2 to H2O2, with the concurrent photooxidation of organic substrates: formate, oxalate, and phenol. Photochemical oxygen reduction is observed in a pH range from 2 to 12. In cases where valence band energy of the semiconductor
is energetically high, autoxidation competes with oxidation of the
donors, and thus turnover numbers are low. Materials with deeper valence
band energies afford higher stability and also oxidation of H2O to O2. We found increased H2O2 evolution rate for surfactant-stabilized nanoparticles versus planar thin films. These results evidence that photochemical O2 reduction may be a widespread feature of organic semiconductors, and open potential avenues for organic semiconductors for catalytic applications. © 2018 American Chemical Society.


FAU-Autoren / FAU-Herausgeber

Heiß, Wolfgang Prof. Dr.
Professur für Werkstoffwissenschaften (lösungsprozessierte Halbleitermaterialien)
Sytnyk, Mykhailo
Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie)


Autor(en) der externen Einrichtung(en)
Linköping University
Politecnico di Bari


Zitierweisen

APA:
Gryszel, M., Sytnyk, M., Jakesova, M., Romanazzi, G., Gabrielsson, R., Heiß, W., & Glowacki, E.D. (2018). General Observation of Photocatalytic Oxygen Reduction to Hydrogen Peroxide by Organic Semiconductor Thin Films and Colloidal Crystals. ACS Applied Materials and Interfaces, 10(16), 13253-13257. https://dx.doi.org/10.1021/acsami.8b01295

MLA:
Gryszel, Maciej, et al. "General Observation of Photocatalytic Oxygen Reduction to Hydrogen Peroxide by Organic Semiconductor Thin Films and Colloidal Crystals." ACS Applied Materials and Interfaces 10.16 (2018): 13253-13257.

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Zuletzt aktualisiert 2019-20-03 um 11:38