Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT
  Modified poly(heptazine imides) : minimizing H2O2 decomposition to maximize oxygen reduction

Rogolino, A., Silva, I. F., Tarakina, N. V., da Silva, M. A. R., Rocha, G. F. S. R., Antonietti, M., et al. (2022). Modified poly(heptazine imides): minimizing H2O2 decomposition to maximize oxygen reduction. ACS Applied Materials and Interfaces, 14(44), 49820-49829. doi:10.1021/acsami.2c14872.

Item is

Basisdaten

einblenden: ausblenden:
Genre: Zeitschriftenartikel

Dateien

einblenden: Dateien
ausblenden: Dateien
:
Article.pdf (Verlagsversion), 4MB
Name:
Article.pdf
Beschreibung:
-
OA-Status:
Hybrid
Sichtbarkeit:
Öffentlich
MIME-Typ / Prüfsumme:
application/pdf / [MD5]
Technische Metadaten:
Copyright Datum:
-
Copyright Info:
-

Externe Referenzen

einblenden:

Urheber

einblenden:
ausblenden:
 Urheber:
Rogolino, Andrea, Autor
Silva, Ingrid F.1, Autor           
Tarakina, Nadezda V.2, Autor                 
da Silva, Marcos A. R., Autor
Rocha, Guilherme F. S. R., Autor
Antonietti, Markus1, Autor                 
Teixeira, Ivo F., Autor
Affiliations:
1Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              
2Nadezda V. Tarakina, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2522693              

Inhalt

einblenden:
ausblenden:
Schlagwörter: photocatalysis; carbon nitrides; hydrogen peroxide; poly(heptazine imides); oxygen reduction
 Zusammenfassung: Photocatalysis provides a sustainable pathway to produce the consumer chemical H2O2 from atmospheric O2 via an oxygen reduction reaction (ORR). Such an alternative is attractive to replace the cumbersome traditional anthraquinone method for H2O2 synthesis on a large scale. Carbon nitrides have shown very interesting results as heterogeneous photocatalysts in ORR because their covalent two-dimensional (2D) structure is believed to increase selectivity toward the two-electron process. However, an efficient and scalable application of carbon nitrides for this reaction is far from being achieved. Poly(heptazine imides) (PHIs) are a more powerful subgroup of carbon nitrides whose structure provides high crystallinity and a scaffold to host transition-metal single atoms. Herein, we show that PHIs functionalized with sodium and the recently reported fully protonated PHI exhibit high activity in two-electron ORR under visible light. The latter converted O2 to up to 1556 mmol L–1 h–1 g–1 H2O2 under 410 nm irradiation using inexpensive but otherwise chemically demanding glycerin as a sacrificial electron donor. We also prove that functionalization with transition metals is not beneficial for H2O2 synthesis, as the metal also catalyzes its decomposition. Transient photoluminescence spectroscopy suggests that H-PHIs exhibit higher activity due to their longer excited-state lifetime. Overall, this work highlights the high photocatalytic activity of the rarely examined fully protonated PHI and represents a step forward in the application of inexpensive covalent materials for photocatalytic H2O2 synthesis.

Details

einblenden:
ausblenden:
Sprache(n): eng - English
 Datum: 2022-10-312022
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1021/acsami.2c14872
 Art des Abschluß: -

Veranstaltung

einblenden:

Entscheidung

einblenden:

Projektinformation

einblenden:

Quelle 1

einblenden:
ausblenden:
Titel: ACS Applied Materials and Interfaces
  Kurztitel : ACS Appl. Mater. Interfaces
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Washington, DC : American Chemical Society
Seiten: - Band / Heft: 14 (44) Artikelnummer: - Start- / Endseite: 49820 - 49829 Identifikator: ISSN: 1944-8244