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Pàgina inicial > Articles > Articles publicats > Insights into the light-driven hydrogen evolution reaction of mesoporous graphitic carbon nitride decorated with Pt or Ru nanoparticles |
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: | Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets. |
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 |
Postprint 11 p, 897.0 KB |
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