Seolha Lim. (2024). Understanding the Reconstruction of Active Sites via Catalyst Surface Engineering for Electrochemical CO2 Conversion. doi: 10.22677/THESIS.200000800915
Type
Thesis
Description
Electrochemical CO2 reduction reaction, Nanocatalyst, Catalyst reconstruction, Cu active site
Table Of Contents
Ⅰ. Introduction 1.1 Electrochemical CO2 Reduction Reaction 1 1.2 Classification of Products by Metal Species 5 1.3 Nanoparticles Catalyst 9 1.4 Reconstruction of Cu-based Catalyst 9
Ⅱ. Reconstruction in Bimetallic Catalysts Utilizing Cu2O Nanoparticles 2.1 Introduction 13 2.1.1 Cu-based Bimetallic Catalyst 13 2.1.2 Catalyst Morphology Control via Surface Energy 14 2.1.3 Research Motivation and Strategy 17
2.2 Theoretical Background 18 2.2.1 Synthesis of Facet-controlled Nanoparticles 18 2.2.2 Fabrication of Bimetallic via Galvanic Replacement Reaction 19
2.3 Experimental 22 2.3.1 Synthesis of Bare Cu2O Nanoparticles 22 2.3.2 Fabrication of Au/Cu2O and Ag/Cu2O Nanoparticles 23 2.3.3 Material Characterization 25 2.3.4 Electrode Preparation 26 2.3.5 Evaluation of CO2 Reduction Performance 26
2.4 Results and Discussion 27 2.4.1 Facet-controlled Cu2O Nanoparticles 27 2.4.2 Formation of Secondary Metal Interfaces based on Surface Energy 35 2.4.3 Investigating Factors of Dissolution and Re-deposition 50 2.4.4 Evaluation of CO2 Reduction Performance 56 2.4.5 Real-time Analysis of Reaction Intermediates 59
2.5 Conclusion 62
Ⅲ. Regulation of Reconstruction via Ligand Control 3.1 Introduction 63 3.1.1 Quantum Dot with Ligand Materials 63 3.1.2 Performance Control through Reconstruction Regulation 66 3.1.3 Research Motivation and Strategy 67
3.2 Theoretical Background 69 3.2.1 Changes in Cu state by Reduction Potential 69
3.4 Results and Discussion 72 3.4.1 Analysis of Catalyst Shape and Phase in Relation to Ligands 72 3.4.2 Reconstruction of Ligands in Quantum Dots 74 3.4.3 Evaluation of CO2 Reduction Performance 82
3.5 Conclusion 84
Ⅳ. Reference 4.1 Introduction 85 4.2 Reconstruction in Bimetallic Catalysts Utilizing Cu2O Nanoparticles 87 4.3 Regulation of Reconstruction via Ligand Control 90
