Title

Controlling the Microenvironment of Catalyst via Electrode Engineering for Electrochemical CO2 Reduction

DGIST Authors

Yujin Lee ; Chanyeon Kim ; Dae-Hyun Nam

Advisor

김찬연

Co-Advisor(s)

Dae-Hyun Nam

Issued Date

2025

Awarded Date

2025-02-01

Citation

Yujin Lee. (2025). Controlling the Microenvironment of Catalyst via Electrode Engineering for Electrochemical CO2 Reduction. doi: 10.22677/THESIS.200000845471

Type

Thesis

Description

Electrochemical CO2 reduction reaction, ionomer, C-shell crystallinity, microenvironment

Table Of Contents

Abstract
List of contents
List of figures
Ⅰ. Introduction
1.1 Electrochemical CO2 Reduction Reaction and Electrode System
1.2 Gas Diffusion Electrode System for Efficient CO2RR
1.3 Adlayer Application for Efficient CO2RR
Ⅱ. Controlling the CO2/H2O Ratio by Ionomer for CO2RR Enhancement
2.1 Introduction
2.1.1 Chemical Structure of the Nafion as Cation Exchange Ionomer
2.1.2 Equivalent Weight of Ionomer Changing the Microenvironment of Catalyst
2.1.3 Strategy for Understanding the CO2RR Enhancement Depending on the Chemical
Structure of Ionomer
2.2 Theoretical Background
2.2.1 Parameters for Comparing the Catalytic Reaction Performance of CO2RR
2.2.2 *CO(2) Coverage affecting the CO2RR performance
2.3 Experimental
2.3.1 Preparation of GDE-based catalyst
2.3.2 Analysis of material properties
2.3.3 CO2RR electrolysis
2.3.4 Mechanism study of ionomer effect
2.4 Results and Discussion
2.4.1 Characteristics of Ionomer Layer
2.4.2 CO2RR Performance Enhanced by Ionomer
2.4.3 Improved *CO Coverage by the Ionomers’ Side Chain
2.4.4 Swelling Fraction Change by the Side Chain of Ionomer
2.4.5 Water Reaction and *OH- Coverage Enhancement by Ionomer
2.5 Conclusion
Ⅲ. CO2 and Ion Permeability Control by C-shell Crystallinity
3.1 Introduction
3.1.1 Proton and Alkali Metal Cation Affecting CO2RR
3.1.2 Material Property of Carbon for Microenvironment Control
3.1.3 Research Motivation and Strategies
3.2 Theoretical Background
3.2.1 Boudouard Reaction and C-shell Formation
3.3 Experimental
3.3.1 Cathode Preparation
3.3.2 CO2RR Performance Test
3.4 Results and Discussion
3.4.1 Material Properties of Cu@C Catalysts
3.4.2 CO2RR Performance Regulated by the C-shell Crystallinity
3.4.3 Microenvironment and CO2RR Performance Change by the Crystallinity of C-shell
3.5 Conclusion
Ⅳ. Reference
4.1 Introduction
4.2 Controlling the CO2/H2O Ratio by Ionomer for CO2RR Enhancement
4.3 CO2 and Ion Permeability Control by C-shell Crystallinity
요약문

URI

http://hdl.handle.net/20.500.11750/58029
http://dgist.dcollection.net/common/orgView/200000845471

DOI

10.22677/THESIS.200000845471

Degree

Master

Department

Department of Energy Science and Engineering

Publisher

DGIST

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