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Synthesis of pyridinium-based ionic liquids for enhancement of oxygen reduction and methanol tolerance for Direct Methanol Fuel Cell : 직접메탄올연료전지 Pt 촉매 산소환원반응과 메탄올 내성 증가를 위한 피리디늄계 이온성 액체의 합성
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 김영규 | - |
dc.contributor.author | 김한울 | - |
dc.date.accessioned | 2018-12-03T01:53:11Z | - |
dc.date.available | 2018-12-03T01:53:11Z | - |
dc.date.issued | 2018-08 | - |
dc.identifier.other | 000000151859 | - |
dc.identifier.uri | https://hdl.handle.net/10371/144154 | - |
dc.description | 학위논문 (석사)-- 서울대학교 대학원 : 공과대학 화학생물공학부, 2018. 8. 김영규. | - |
dc.description.abstract | This paper is about the synthesis and application of pyridinium-based ionic liquids for the enhancement of oxygen reduction and methanol tolerance on the Pt catalyst for DMFC. DMFC is a promising candidate for portable fuel cell because of the ease of transportation resulting from the liquid phase of methanol instead of gas phase. However, it has several unresolved problems that methanol crossover and the cost of Pt catalyst. To enhance the oxygen reduction reaction (ORR) activity and methanol tolerance of Pt catalyst, several ionic liquids were tested on the Pt surface. Herein, the monocyclic cation ionic liquids that are imidazolium, pyridinium, pyrrolidinium and piperidinium were synthesized. In addition, the multicyclic cation ionic liquids, such as isoquinolinium, phenanthrolinium and bipyridinium were also synthesized. The anion is fixed to bis(triflouoromethane)sulfonimide to analyze the effects resulted from cation structure such as saturation, aromaticity and protonation. The cation character was developed by alkylation with 1-boromobutane or by protonation with various acids. Alkylated and protonated cations were afforded in high yield over than 90%. And the yields of anion metathesis reaction were moderate to obtain the target ionic liquid. The ionic liquids were analyzed by proton, carbon and fluorine NMR followed by the measurement of melting point, viscosity, elemental analysis and single crystal XRD. The multicyclic ionic liquids can improve the ORR activity over three times. The multicyclic protonated ionic liquids also reduce the methanol oxidation current on the surface of the Pt catalyst. | - |
dc.description.tableofcontents | Abstract ⅰ
List of Figures ⅲ List of Tables ⅳ List of Abbreviations ⅴ Chapter 1. Introduction 1 1.1. Ionic liquids 1.1.1 Introduction of ionic liquids 1.1.2 Applications of ionic liquids 1.2. Direct methanol fuel cell (DMFC) 1.2.1 Introduction of DMFC 1.2.2 Unresolved issues of DMFC 1.2.3 Applications of ionic liquids on DMFC Chapter 2. Results and discussion 16 2.1. Synthesis of ionic liquids 2.1.1 Synthesis of monocyclic ionic liquids 2.1.2 Synthesis of multicyclic ionic liquids 2.1.3 Synthesis of bipyridine based ionic liquids 2.1.4 Synthesis of protic ionic liquids 2.2. Electrochemical performance of DMFC 2.2.1 Oxygen reduction reaction on Pt catalyst of DMFC 2.2.2 Methanol oxidation reaction on Pt catalyst of DMFC Chapter 3. Conclusions 40 References 42 Experimentals 44 Appendices 50 Abstract in Korean 64 | - |
dc.format | application/pdf | - |
dc.format.medium | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject.ddc | 660.6 | - |
dc.title | Synthesis of pyridinium-based ionic liquids for enhancement of oxygen reduction and methanol tolerance for Direct Methanol Fuel Cell | - |
dc.title.alternative | 직접메탄올연료전지 Pt 촉매 산소환원반응과 메탄올 내성 증가를 위한 피리디늄계 이온성 액체의 합성 | - |
dc.type | Thesis | - |
dc.contributor.AlternativeAuthor | Hanul Kim | - |
dc.description.degree | Master | - |
dc.contributor.affiliation | 공과대학 화학생물공학부 | - |
dc.date.awarded | 2018-08 | - |
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