Ionic-Liquid Mixtures: from Surface Structure to Catalytic Performance

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Ionic liquids (ILs), with their unique combination of properties and wealth of potential applications, have captured the imagination of a large community of scientists in recent years. Fundamental studies on ILs have led to breakthroughs in our understanding and have enabled the development of ILs that are promising candidates for use in areas such as catalysis, carbon-capture and storage (CCS), biomass processing, as electrolytes in batteries, supercapacitors and dye-sensitised solar cells and more. This project aims to develop and utilise a wide range of experimental and computational methodologies to investigate the surface, and bulk, structure of IL mixtures that are currently poorly understood and consequently underutilised. We previously developed a novel technique that can probe liquid interfaces with direct chemical specificity, Reactive-Atom Scattering - Laser-Induced Fluorescence (RAS-LIF), and used it to detect H (or D)-containing functional groups at IL interfaces. We will extend its applicability to new chemical functionalities, in particular fluorinated species, by using high-energy Al-atoms as reactive probes of fluorinated functionality (on both cations and anions) at IL surfaces. This will be complemented by new capabilities for studying liquid surfaces by X-ray and neutron reflectivity under catalytically relevant conditions, and by bulk structure/property studies. The detailed understanding developed will lead to structure-property relationships in IL mixture systems that will be used in the final stages of the project in supported IL phase (SILP) catalysis and will support the deployment of new and bespoke functional ILs for catalysis in SILP systems. This ambitious project aims to cover the whole pipeline of IL development from preparation, to structural understanding, and then to industrially relevant applications.