Project description
Elucidating how nanobubbles form
Nanobubbles are tiny gas pockets formed in liquids that play a crucial role in various chemical and physical processes. However, their formation mechanism and behaviour are poorly understood. With the support of the Marie Skłodowska-Curie Actions programme, the NANOSEED project will further investigate nanobubble nucleation and reactivity inside tiny liquid droplets (microdroplets) using advanced electrochemical techniques. Researchers will apply an electric charge to a microelectrode to produce hydrogen gas when enough gas is produced, a nanobubble will form. The team will measure how this bubble blocks molecule flow to the electrode to calculate its size and formation rate. Furthermore, they will explore how nanobubbles might create reactive oxygen species, which could lead to exciting new chemical reactions at the gas-water boundary.
Objective
The NANOSEED, Nucleation and Analysis of Nanobubbles Observed by Single Entity Electrocatalysis in microDroplets, project seeks to directly electroanalyze microdroplet-confined nanobubble properties to elucidate the physical chemistry of their formation and reactivity. Its success will develop the first stochastic electrochemical method for nanobubble nucleation in microdroplet reactors, calculate important physical parameters of heterogenous nucleation processes under femtoliter confinement, and address the topical literature controversy regarding redox species generated and/or stabilized at gas|water interfaces.
When a microdroplet collides with a microelectrode surface it forms a nanoscale contact area. By loading these microdroplets with acid, and applying a sufficient bias to the microelectrode, the hydrogen evolution reaction (HER) will occur at the microdroplet|microelectrode interface. Under conditions where the evolved hydrogen exceeds the critical concentration, a hydrogen nanobubble will nucleate in the microdroplet. The nanobubble is detected as a sharp decrease in cathodic current due to the insulating phase physically blocking molecular flux of the electrochemically active species (i.e. proton) to the microelectrode surface. Bulk mathematical models are re-derived for microdroplet reactors to relate the transient current-time profiles to nanobubble sizes and nucleation rates. Finite element simulations will validate the equations and provide additional information on the nanobubble geometry and nucleation site.
The microdroplet is further used to confine radical oxygen species that may be produced at the nanobubble interface by accumulating the redox species to electrochemically-detectable levels. The detection of reactive oxygen species will provide clarity to an ongoing debate that may, in turn, reveal opportunities to leverage the harsh physical properties at the dielectric gas|water boundary to drive remarkable interfacial chemistry.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences chemical sciences catalysis electrocatalysis
- natural sciences mathematics pure mathematics geometry
- natural sciences chemical sciences physical chemistry
- natural sciences mathematics applied mathematics mathematical model
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Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships
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Call for proposal
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(opens in new window) HORIZON-MSCA-2024-PF-01
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2311 EZ Leiden
Netherlands
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