Photoelectrocatalytic hydrogen production on SnS films prepared by chemical bath
Por:
Peña-Méndez Y., Gamboa S.A., López-Martínez S.D., Kharissov-Ildusovich B., Gómez-Vidales V.
Publicada:
1 ene 2024
Ahead of Print:
1 may 2024
Resumen:
Sustainable energy production is urgently needed due to the high environmental costs associated with the use of fossil fuels. Green hydrogen produced by photoelectrocatalysis is an emerging solution for meeting the global energy demand. Herein, we discuss the physicochemical properties and electrochemical hydrogen production of SnS films prepared via chemical bath deposition at 40 °C under visible light. The synthesis times were varied to obtain films with thicknesses of 102, 295, and 495 nm deposited at 3, 4, and 6 h, respectively. All samples were annealed at 400 °C and exhibited an orthorhombic phase. The direct optical bandgap transition decreased from 1.44 to 1.25 eV with increasing sample thickness. With increasing synthesis time, a significant amount of Sn was deposited, forming a surface monolayer of amorphous SnO2, which improved the electronic conductivity of the samples. However, the presence of SnO2 reduced the number of sulfur vacancies, which is crucial for the hydrogen evolution reaction. Therefore, the SnS film synthesized for 3 h exhibited the highest hydrogen evolution rate, which reached 18,826 µmol/m2-h. These results suggest the feasibility of using SnS films for photoelectrochemical hydrogen generation. © 2024 Hydrogen Energy Publications LLC
Filiaciones:
Peña-Méndez Y.:
Universidad Autónoma de Nuevo León (UANL), Facultad de Ciencias Químicas (FCQ), Departamento de Materiales I, Ave. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, C.P. 66455, N.L, Mexico
Gamboa S.A.:
Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Privada Xochicalco S/N, Centro, 62580, Temixco, Morelos, Mexico
López-Martínez S.D.:
Universidad Autónoma de Nuevo León (UANL), Facultad de Ciencias Químicas (FCQ), Departamento de Ingeniería Química e Ingeniería Ambiental, Av. Universidad S/N, Ciudad Universitaria, San Nicolás de los Garza, C. P. 66455, N. L., Mexico
Kharissov-Ildusovich B.:
Universidad Autónoma de Nuevo León (UANL), Facultad de Ciencias Químicas (FCQ), Departamento de Materiales I, Ave. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, C.P. 66455, N.L, Mexico
Gómez-Vidales V.:
Laboratorio de Resonancia Paramagnética Electrónica, Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, México D. F, 04510, Mexico
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