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Investigation of urea electrosynthesis assisted by localized surface plasmon resonance using labeled gases and in situ X- ray Absorption Spectroscopy

Grant number: 24/13493-0
Support Opportunities:Scholarships abroad - Research Internship - Post-doctor
Effective date (Start): October 01, 2024
Effective date (End): September 30, 2025
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal Investigator:Susana Inés Córdoba de Torresi
Grantee:Leandro Augusto Faustino
Supervisor: Dr Franziska Emmerling
Host Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Research place: Bundesanstalt Für Materialforschung Und -Prüfung, Germany  
Associated to the scholarship:22/04604-7 - Plasmonic contributions to N2 and CO2 co-electrolysis, BP.PD

Abstract

The electrosynthesis of urea has become a promising alternative approach to theenergy intensive traditional Bosch-Meiser process for urea production. However,there are still challenges that needed to be overcome. These challenges areassociated to the high stability of NaN bond of N2 species, low solubility of gasesin different solvents, adsorption of gases over catalyst surface and competitionwith HER (Hydrogen Evolution Reaction) leading to lower values of urea yieldand consequently low efficiencies. Furthermore, as several nitrogen species canbe present in the media and environment, such as NOx and NH3, false-positiveresults can lead to misunderstanding results. The electrochemistry assisted bylocalized surface plasmon resonance (LSPR) using metal nanoparticles has beenreported to enhance different electrochemical reactions, including C-N couplingto yield urea. Although, the mechanisms involved during the electrocatalysisassisted by LSPR are still unknown. This proposal will provide insights about thenitrogen and carbon source during the electrosynthesis of urea enhanced byLSPR using labeled species. In addition, in situ and operando X-ray absorptionspectroscopy (XAS) measurements will provide insights about the effect of LSPRon the material during the C-N coupling.

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