Efficient solar-to-hydrogen conversion based on synergetic effects between Pd clusters and CdS nanoparticles supported on a sulfur-functionalized graphene
Metadatos
Afficher la notice complèteAuteur
Godino Salido, María Luz; Valbuena Rus, Alba M.; Gutiérrez Valero, María Dolores; Cruz Sánchez, Rubén; López Garzón, Francisco Javier; Melguizo, Manuel; López Garzón, RafaelEditorial
Elsevier
Materia
Pd-clusters Sulfur-functionalized graphene Cadmium sulfide
Date
2024-02-18Referencia bibliográfica
Godino-Salido, María L., et al. Efficient solar-to-hydrogen conversion based on synergetic effects between Pd clusters and CdS nanoparticles supported on a sulfur-functionalized graphene. Surfaces and Interfaces 46 (2024) 104078 [10.1016/j.surfin.2024.104078]
Patrocinador
Spanish Government (Project RTI2018-101558-BC21); Autonomous Regional Government (Junta de Andalucía, Group PAIDI FQM273 and RNM342); University of Jaén (EI_FQM6-2023); Funding for open access charge provided by the University of Jaén / CBUARésumé
A new hybrid, GSw-Pd-CdS, consisting of CdS nanoparticles and Pd clusters supported on S-functionalized
graphene, GSw, has been obtained for photocatalytic water reduction. GSw has been prepared by mild treatment
of graphene, G, with cold CS2 plasma allowing the G sp2 moieties to be preserved. GSw-Pd-CdS was prepared
under mild conditions by the sequential adsorption on GSw of small-size Pd particles followed by the slow
precipitation of CdS. The support of Pd clusters on GSw is controlled by the interaction with S-functions. The
support of the CdS nanoparticles occurred by the physical adsorption on GSw. The GSw-Pd-CdS hybrid shows
high photocatalytic activity in water reduction providing a constant average H2 production of 3.79 mmol g–1 h–1
during 20 h. This value outperforms 31.1 times that of CdS. The excellent behavior of the hybrid is based on
suitable optical properties of Pd clusters and on the preservation of the graphene π-conjugated moieties act as
active reduction sites. The analysis of both the structure and the optical properties of GSw-Pd-CdS and its
components allowed to propose a reliable mechanism to the photocatalytic reduction in which the Pd clusters
and the GSw cocatalysts act as hole receptor and electron receptor from CdS, respectively.