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|Title:||Surface effects of functionalized Cu2O-derived Cu(0) for C2+-selective electrochemical CO2 reduction||Authors:||Lim, Carina Yi Jing||Keywords:||Engineering::Materials||Issue Date:||2022||Publisher:||Nanyang Technological University||Source:||Lim, C. Y. J. (2022). Surface effects of functionalized Cu2O-derived Cu(0) for C2+-selective electrochemical CO2 reduction. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/158217||Abstract:||Selective electrochemical carbon dioxide reduction (CO2RR) to multi-carbon (C2+) products is an attractive method to close the carbon cycle as well as to provide a long-term, large-scale energy storage solution. With copper catalysts, since C2+ product formation is in direct competition with the formation of single-carbon products and hydrogen evolution, methods to modulate the product selectivity are highly desirable. In addition, surface charging effects are not commonly considered in CO2RR experiments. Functionalized cuprous oxide-derived copper synthesized via a simple wet chemistry approach was tested in a H-cell set-up and their surface properties were then studied with electrochemical impedance spectroscopy (EIS) and pulsed voltammetry (PV). Selectivity and turnover were observed to improve with imidazole functionalization, with exceptionally high C2+ selectivity and wide C2+-selectivity potential widow with histidine-functionalized catalysts. In addition, strong correlations of parameters describing surface charging effects obtained from EIS and PV highlight its importance in influencing C2+ selectivity. The strong correlation between EIS and PV parameters with C2+ selectivity also suggests the potential of these experiments to be exploited for high-throughput catalyst discovery in the future.||URI:||https://hdl.handle.net/10356/158217||Schools:||School of Materials Science and Engineering||Organisations:||A*STAR Institute of Materials Research and Engineering||Fulltext Permission:||embargo_restricted_20240531||Fulltext Availability:||With Fulltext|
|Appears in Collections:||MSE Student Reports (FYP/IA/PA/PI)|
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|4.18 MB||Adobe PDF||Under embargo until May 31, 2024|
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