DGIST Scholar: Poly-Melamine Coated Copper Nanowires for Efficient Electrochemical CO2 Reduction

Department of Energy Science and Engineering Theses Master

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Poly-Melamine Coated Copper Nanowires for Efficient Electrochemical CO2 Reduction

Title: Poly-Melamine Coated Copper Nanowires for Efficient Electrochemical CO2 Reduction

Author(s): Byeongjae Kang

DGIST Authors: Byeongjae Kang ; Youngu Lee ; Yun Hee Jang

Advisor: 이윤구

Co-Advisor(s): Yun Hee Jang

Issued Date: 2024

Awarded Date: 2024-02-01

Type: Thesis

Description: Copper nanowire; Poly-melamine; Core-shell nanostructure; CO2 reduction reaction

Table Of Contents: Abstract i
List of contents ii
List of tables iii
List of figures vi

Ⅰ. Introduction 1
1.1 Copper nanowire for CO2 reduction 1
1.2 Poly-melamine coated CuNW 2
1.3 Influences of chemical environment on CO2 reduction 3
1.4 Influences of porous shell on CO2 reduction 4

Ⅱ. Theoretical background 5
2.1 Cpper nanowire (CuNW) 5
2.1.1 Growth mechanism of CuNWs 5
2.1.2 Synthesis methods for CuNWs 7
2.1.3 Purification of CuNWs 8
2.2 Synthesis methods for polymer coated metal nanowires 10
2.2.1 Electropolymerization 10
2.2.2 In situ polymerization 12
2.3 Electrochemical CO2 redcution reaction (CO2RR) 13
2.3.1 Copper for electrochemical CO2RR 15
2.3.2 The mechanism of CO2RR on Cu Surface 17
2.3.3 Modifier addition to copper for enhanced CO2RR 19
2.4 The characteristics of melamine 25
2.4.1 High interaction with CO2 25
2.4.2 Abundant and ordered reaction sites 27

Ⅲ. Experimental Section 30
3.1 Chemicals and materials 30
3.2 Synthesis of CuNWs 30
3.3 Preparation of poly melamine coated CuNWs 30
3.4 Preparation of poly-melamine 31
3.5 Characterization 31
3.6 Electrode preparation and electrochemical CO2RR measurement 32

Ⅳ. Result and discussion 35
4.1 Poly-melamine coated CuNWs synthesis 35
4.1.1 Synthesis of poly-melamines 35
4.1.2 Stirring method 36
4.1.3 Hydrothermal method 41
4.1.4 Reflux heating method 43
4.2 Poly-melamine as a modifier for catalyst activity enhancement 48
4.2.1 Influence of poly-melamine chemical composition on catalyst activity 50
4.2.2 Influence of poly-melamine pore on catalyst activity 54

Ⅴ. conclusion 58

Reference 59
Summary 64