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Electrochemical reduction of molecular nitrogen to ammonia using plasmonic catalysts: Towards more sustainable ammonia production

Project description

Paving the way to cleaner ammonia

Ammonia is an important ingredient for global food and energy systems, but its production through the century-old Haber-Bosch process comes at a high environmental cost. This is why scientists are exploring a cleaner method that involves converting nitrogen and water into ammonia using electricity (without carbon emissions). The EU-funded Plasmmonia project is advancing this approach by enhancing it with light. Specifically, the project is designing gold, copper, and alloy nanoparticles that harness light to boost the electrochemical reaction’s efficiency. These plasmonic catalysts could make ammonia production both cleaner and more energy efficient. This is in line with the EU’s 2030 climate goals.

Objective

Ammonia (NH3) production is essential for human development, as it is a key precursor in manufacturing synthetic fertilizers, chemicals, and hydrogen storage. Currently, NH3 is produced via the Haber-Bosch (H-B) method. Achieving sustainable alternatives to the H-B process will significantly contribute to the climate, environmental protection, and energy efficiency goals of the EU's 2030 Plan. The electrochemical reduction of molecular nitrogen (eNRR) to obtain NH3 is one of today's most promising routes. This methodology allows the direct conversion of N2 and water into NH3 at normal temperature and pressure without CO2 emissions. Due to their unique optical properties, an innovative strategy to improve eNRR involves using plasmonic-metal nanoparticles (NPs) as electrocatalysts. The excitation of the surface electrons occurs by illuminating the plasmonic substrates, generating localized surface plasmon resonance (LSPR). LSPR provides an additional source of high-energy electrons to the electrocatalytic system, which can increase efficiency and improve selectivity towards NH3 formation. This plasmonic-electrochemical combination is termed Plasmon-Assisted Catalysis.
This research aims to design, synthesize, and characterize plasmonic NPs made of Au, Cu, and Au/Cu alloys to maximize their activity as electrocatalysts for eNRR. The synthesis of NPs with different morphologies will be carried out through various chemical, and hydrothermal methods. The evaluation of the electrocatalytic activity will be conducted in an H-type electrochemical cell and the different synthesized electrocatalysts be supported on carbonaceous electrodes as the working electrode. The activity and stability of the materials will also be evaluated using aqueous and ionic liquids as electrolytes. Furthermore, real-time monitoring of the electrochemical process and determination of the eNRR mechanism will be achieved through in situ spectroelectrochemical techniques (SEIRAS, SERS).

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

(opens in new window) HORIZON-MSCA-2024-PF-01

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Coordinator

FUNDACION FUNDECYT - PARQUE CIENTIFICO Y TECNOLOGICO DE EXTREMADURA
Net EU contribution
€ 209 914,56
Address
AVENIDA DE ELVAS CAMPUS UNIVERSITARIO EDIFICIO PARQUE CIENTIFICO TECNOLOGICO
06071 Badajoz
Spain
Region
Centro (ES) Extremadura Badajoz
Activity type
Research Organisations
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Total cost
No data