DGIST Scholar: Control of Hydrogen Evolution Reaction using Electrolyte Additives during Electrochemical CO₂ Reduction in Acidic Media

Detail View

Department of Energy Science and Engineering Theses Master

Citations

WEB OF SCIENCE

Citations

SCOPUS

Metadata Downloads

XML

Title: Control of Hydrogen Evolution Reaction using Electrolyte Additives during Electrochemical CO₂ Reduction in Acidic Media

Table Of Contents: Ⅰ. Introduction 1
1.1 Electrochemical CO2 Reduction Reaction (CO2RR) 1
1.2 Advantages of Acidic Media for CO2RR 3
1.3 Hydrogen Evolution Reaction (HER) in Acidic Media 3
1.4 Proton Transfer Mechanisms in Aqueous Electrolyte 4
1.5 Additive with Hydrogen Bond Donor/Acceptor moiety for HER suppression 5
II. Experimental 8
2.1 Materials and Electrolyte Preparation 8
2.2 Cell Configuration 9
2.3 Electrochemical Measurements and Product Analysis 9
2.4 Structural and Surface Characterization 10
III. Result and Discussion 11
3.1 Molecular Design and Properties of Additives 11
3.2 Effect of Additives on HER Performance under Various pH Conditions 13
3.2.1 Linear Sweep Voltammetry (LSV) Curves Analysis under Ar atmosphere 13
3.2.2 Tafel Slope Analysis under Acidic media 14
3.3 Electrochemical Performance and Product Selectivity in CO2RR 17
3.3.1 HER Partial Current Density Analysis 17
3.3.2 CO2R Partial Current Density Analysis 20
3.3.3 Product Distribution Analysis 22
3.3.4 C2+/C1 Product Ratio Analysis 27
3.3.5 Hydrocarbon/Oxygenate Product Ratio Analysis 29
3.4 Characterization of Catalyst under Additive Effect during CO2RR 31
3.4.1 Morphological Change before and after CO2RR 31
3.4.2 Surface Chemical State Analysis before and after CO2RR 33
3.4.3 Double-Layer Capacitance Analysis for ECSA before and after CO2RR 35
3.4.4 Electrochemical Impedance Spectroscopy (EIS) Analysis 37
IV. Conclusion 39
Reference 41

URI: https://scholar.dgist.ac.kr/handle/20.500.11750/59676
http://dgist.dcollection.net/common/orgView/200000946706

Show Full Item Record