Doctoral theses of the School of Chemical Engineering are available in the open access repository maintained by Aalto, Aaltodoc.
Public defence in Chemistry, M.Sc. Md Noor Hossain
Public defence from the Aalto University School of Chemical Engineering, Department of Chemistry and Materials Science
When
–
Where
Lecture Hall C100 Aluminium
Event language(s)
English
Title of the thesis: Electrochemical Reduction of COâ‚‚ on Molecular Catalyst: Unfolding Operation Parameters Influence on Product Selectivity
Thesis defender: Md Noor Hossain
Opponent: Prof. Kim Daasbjerg, Aarhus University, Denmark
Custos: Prof. Tanja Kallio, Aalto University School of Chemical Engineering
This dissertation investigates the electrochemical reduction of CO2 (eCO2R) to chemicals and fuels using molecular catalysts and the influence of operational parameters on product selectivity. CO2 is one of the greenhouse gases responsible for global warming. eCO2R is a promising approach because essential commodity chemicals and fuels can be produced with a negative carbon emission footprint when renewable energy sources, such as wind and solar, are used to power the reaction. This approach could potentially help to close the carbon cycle and enhance the circular economy. In the future, CO2 will not be considered a waste but a valuable resource. However, substantial challenges exist and must be addressed for eCO2R to effectively produce chemicals and fuels, such as catalyst activation, product selectivity, and the high overpotential required to drive the reaction.
To overcome these challenges, I developed molecular catalysts/carbon nanotube composite capable of converting CO2 into one-carbon-containing chemicals and fuels, such as, methanol, CO and methane. My investigation revealed that the activity of the composite and product selectivity strongly depend on operational parameters, such as temperature and applied potential. In addition, the type of electrochemical cell used in the experiment significantly affects product formation. The findings from this work could greatly benefit the design and development of industrial-scale CO2 electrolyzers. It also provides valuable guidance for designing and developing molecular catalysts, conducting detailed studies of electrocatalysts for eCO2R in H-cells and industrially relevant flow cells, as well as for product analysis, temperature studies, and mechanistic investigations.
Keywords: eCOâ‚‚R, Molecular Catalysts, H-cell, Flow cell, DEMS, Temperature Influence, Product Selectivity
Thesis available for public display 10 days prior to the defence at .
Contact information:
Md Noor Hossain
noor.hossain@aalto.fi
+358505127595
Doctoral theses of the School of Chemical Engineering
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