Insights into the light-driven hydrogen evolution reaction of mesoporous graphitic carbon nitride decorated with Pt or Ru nanoparticles

Ru or Pt nanoparticles have been prepared following the organometallic approach and deposited onto the surface of mesoporous graphitic carbon nitride (mpg-CN). Three different Ru-based samples have also been compared to investigate the effect of 4-phenylpyridine as a stabilizing agent. The photocata...

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Detalles Bibliográficos
Autores: Álvarez Prada, Luis Ignacio, Nguyen, Anh Dung, Romero Fernández, Nuria|||0000-0002-2704-7779, Hou, Heting|||0000-0002-7806-1781, Benazzi, Elisabetta, Escriche, Lluís|||0000-0003-2562-5034, Acharjya, Amitava, Thomas, Arne, Schwarze, Michael|||0000-0002-5632-603X, Schomäcker, Reinhard, Sala, Xavier|||0000-0002-7779-6313, Natali, Mirco|||0000-0002-6638-978X, García-Antón, Jordi|||0000-0002-2401-0401, Tasbihi, Minoo|||0000-0001-8623-4323
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:288211
Acceso en línea:https://ddd.uab.cat/record/288211
https://dx.doi.org/urn:doi:10.1039/d1dt03006j
Access Level:acceso abierto
Palabra clave:Charge separation
Electrocatalysts
G-C3N4
System
Visible-light
Water
Descripción
Sumario:Ru or Pt nanoparticles have been prepared following the organometallic approach and deposited onto the surface of mesoporous graphitic carbon nitride (mpg-CN). Three different Ru-based samples have also been compared to investigate the effect of 4-phenylpyridine as a stabilizing agent. The photocatalytic performance towards the hydrogen evolution reaction (HER) has been tested showing that all hybrid systems clearly outperform the photocatalytic activity of bare mpg-CN. In particular, Pt-decorated mpg-CN yields the largest H2 production upon visible-light irradiation (870 μmol h-1 g-1, TOF = 14.1 h-1, TON = 339 after 24 h) when compared with the Ru-based samples (137-155 μmol h-1 g-1, TOFs between 2.3-2.7 h-1, TONs between 54-57 after 24 h). Long-term photochemical tests (up to 65 h irradiation) show also an improved stability of the Pt-based samples over the Ru counterpart. Photophysical experiments aimed at rationalizing the photocatalytic performance of the different hybrid systems elucidate that the enhanced activity of the Pt-decorated mpg-CN over the Ru-based analogues arises from improved electron transfer kinetics from mpg-CN to the metal nanoparticles.

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