C3N4/reduced graphene oxide photocatalysts loaded with Ag or Ag/Pt for H2 evolution from aqueous solution of triethanolamine

• Published in: Catalysis today Vol. 413-415; p. 113965
• Main Authors: García-López, E.I., Meo, P. Lo, Di Vincenzo, A., Palmisano, L., Marcì, G.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15-03-2023
• Subjects: C3N4/reduced graphene oxide; H2 evolution; Photoreforming; Platinum cocatalyst; Silver cocatalyst; Photoreforming; C3N4/reduced graphene oxide; H2 evolution; Silver cocatalyst; Platinum cocatalyst
• ISSN: 0920-5861; 1873-4308
• DOI: 10.1016/j.cattod.2022.11.026

Composites of C3N4/reduced graphene oxide have been used as photocatalysts for triethanolamine photo-reforming with H2 generation in aqueous solution. The rate of H2 production over the Ag loaded best performing photocatalyst reached 525 μmol·h−1·g−1 which increases to ca. 88,000 μmol·h−1·g−1 in the presence also of 1% of Pt. The apparent quantum efficiency (AQE) of the optimal material was ca. 9% by using both visible LED or natural sunlight irradiation.
[Display omitted]
•Composites of C3N4/reduced graphene oxide and silver as co-catalyst have been prepared.•The activity of the prepared materials was tested for H2 generation by photoreforming of aqueous solutions of triethanolamine.•The presence of Pt as further co-catalyst enormously increased (more than two order of magnitude) the H2 evolution.•The highest H2 production (88,000 μmol·h−1·g−1) was obtained by using the C3N4/reduced graphene oxide photocatalyst with 1% of both Ag and Pt.•The apparent quantum efficiency (AQE) of the optimal material was ca. 9%.