Insights into the light-driven hydrogen evolution reaction of mesoporous graphitic carbon nitride decorated with Pt or Ru nanoparticles
Álvarez Prada, Luis Ignacio (Universitat Autònoma de Barcelona. Departament de Química)
Nguyen, Anh Dung (Technische Universität Berlin. Department of Chemistry)
Romero Fernández, Nuria (Universitat Autònoma de Barcelona. Departament de Química)
Hou, Heting (Universitat Autònoma de Barcelona. Departament de Química)
Benazzi, Elisabetta (Università degli Studi di Ferrara. Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie)
Escriche Martínez, Lluís (Universitat Autònoma de Barcelona. Departament de Química)
Acharjya, Amitava (Technische Universität Berlin. Institut of Chemistry)
Thomas, Arne (Technische Universität Berlin. Institut of Chemistry)
Schwarze, Michael (Technische Universität Berlin. Department of Chemistry)
Schomäcker, Reinhard (Technische Universität Berlin. Department of Chemistry)
Sala Román, Xavier (Universitat Autònoma de Barcelona. Departament de Química)
Natali, Mirco (Università degli Studi di Ferrara. Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie)
García-Antón, Jordi (Universitat Autònoma de Barcelona. Departament de Química)
Tasbihi, Minoo (Technische Universität Berlin. Department of Chemistry)

Data:	2022
Resum:	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.
Ajuts:	Ministerio de Ciencia e Innovación PID2019-104171RB-I00
Nota:	Altres ajuts: I. A.-P. acknowledges the Universitat Autònoma de Barcelona for his pre-doctoral grant. J.G.-A. acknowledges the Serra Húnter Program. The authors thank the Microscopy Service of the Universitat Autònoma de Barcelona for technical assistance with TEM and SEM
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Charge separation ; Electrocatalysts ; G-C3N4 ; System ; Visible-light ; Water
Publicat a:	Dalton transactions, Vol. 51, issue 2 (January 2022) , p. 731-740, ISSN 1477-9234

DOI: 10.1039/d1dt03006j
PMID: 34918734

Postprint 11 p, 897.0 KB

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