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Synthesis, characterization and application of MoS2 and WS2 films in photoelectrocatalysis for hydrogen production

Grant number: 17/12794-2
Support type:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): September 01, 2017
Effective date (End): May 31, 2021
Field of knowledge:Physical Sciences and Mathematics - Chemistry
Principal Investigator:Lucia Helena Mascaro Sales
Grantee:Marina Medina da Silva
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Associated research grant:13/07296-2 - CDMF - Center for the Development of Functional Materials, AP.CEPID


The high global energy demand and the environmental damage caused by the intensive use of fossil fuels over the years, shows the need to develop forms of alternative energy that is clean, renewable and economically attractive. One of the advantages of using hydrogen as a fuel is that in its combustion process there is no emission of polluting gases into the atmosphere. The photoelectrochemical process of water reduction is seen as an interesting process in the sense that it uses the energy of the photon to split the water molecule and produce H2. Several materials are being developed and characterized in order to evaluate as potential photocathodes for the catalysis of the hydrogen evolution reaction. In this way, this project proposes to develop and characterize photocathodes of MoS2 and WS2, synthesized by electrodeposition and by the chemical method, as well as the preparation of these films doped with Fe, Ni and Co. The physical characterization of the films will be carried out on the basis of different techniques such as: spectroscopy in the UV-Vis region, X-ray diffraction, Raman spectroscopy, among others. For the evaluation of the most efficient material, potentiostatic and galvanostatic polarization curves will be performed in order to analyze the Tafel parameters such as the applied overpotential and the exchange current density. (AU)