Sargeant, Elizabeth (2023). Electrocatalysis in aqueous brines and at low temperatures. University of Birmingham. Ph.D.
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Sargeant2023PhD.pdf
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Abstract
This work investigates electrocatalytic reduction of CO2 in concentrated electrolytes at temperatures below zero. In Mg(ClO4)2 and KOH brines the reduction of CO2 at these low temperatures is promoted in favour of the main competing reaction, hydrogen evolution. These results discuss potential scenarios for CO2 reduction in non-standard conditions, such as in the freezing, CO2 rich environment on the Martian surface. In an aim to understand the reason for the increase in CO2 reactivity at low temperature, so that the system can be refined and improved, further studies on physiochemical parameters and computational calculations are also presented. The change in viscosity with temperature is measured and its consequent effect on the diffusion of CO2 discussed. The role of the electrolyte in stabilising reactant intermediates is probed using computational calculations. Together these results provide preliminary insights into the CO2 reduction reaction at these low temperatures.
| Type of Work: | Thesis (Doctorates > Ph.D.) | |||||||||
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| Award Type: | Doctorates > Ph.D. | |||||||||
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| Licence: | All rights reserved | |||||||||
| College/Faculty: | Colleges (2008 onwards) > College of Engineering & Physical Sciences | |||||||||
| School or Department: | School of Chemistry | |||||||||
| Funders: | Engineering and Physical Sciences Research Council | |||||||||
| Subjects: | Q Science > QD Chemistry | |||||||||
| URI: | http://etheses.bham.ac.uk/id/eprint/13821 |
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