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Evaluation of the percentage of carbon nitrides containing single atoms in TiO2-based photoanodes

Grant number: 21/11806-2
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): January 01, 2022
Effective date (End): December 31, 2022
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal researcher:Lucia Helena Mascaro Sales
Grantee:Juliana Lucca Francisco
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

Abstract

With an imminent depletion of fossil fuels, there was an intensification of research in the environmental areas and systems for the generation and storage of energy from renewable sources, such as hydrogen from water splitting. However, to obtain this fuel by electrolysis, high overpotentials are required, in addition to the thermodynamics, which hinders large-scale production. Some approaches that can be useful to overcome this problem are the use of more easily oxidized species such as methanol to facilitate or even replace the reaction of the evolution of oxygen, the use of light as an energy source, exciting semiconductors such as TiO2. The use of pure TiO2, however, has drawbacks such as a high rate of charge recombination, which can be mitigated by the use in composites with species such as carbon nitrides. In this context, this project proposes the evaluation of photoelectrochemical properties in front of methanol oxidation reaction, of TiO2-based photoanodes containing different percentages of the Poly(heptazine imide) (PHI) type carbon nitrides, which contains in its structure single atoms of Co2+ and/or Ni2+.(AU)

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