Development of Durable Catalysts for Oxygen Reduction Reaction in Polymer Electrolyte Membrane Fuel Cell
- Title
- Development of Durable Catalysts for Oxygen Reduction Reaction in Polymer Electrolyte Membrane Fuel Cell
- Alternative Title
- 고분자 전해질막 연료전지의 산소환원반응을 위한 고내구성 전기화학 촉매의 개발
- Author(s)
- Ha-Young Lee
- DGIST Authors
- Ha-Young Lee ; Jong-Sung Yu ; Su-Il In
- Advisor
- 유종성
- Co-Advisor(s)
- Su-Il In
- Issued Date
- 2023
- Awarded Date
- 2023-08-01
- Type
- Thesis
- Description
- PGM catalyst; PEMFC; durability; oxygen reduction reaction; catalyst support
- Table Of Contents
-
Ⅰ. Introduction 1
1.1 Motivation 1
1.2 Objective of this thesis 2
1.3 Thesis outline 3
1.4 References 4
Ⅱ. Background 5
2.1 Introduction to PEMFCs 5
2.1.1 Components of PEMFCs 6
2.1.2 Thermodynamics of PEMFCs 7
2.1.3 Kinetics of PEMFCs 8
2.1.4 Irreversibility of PEMFCs 9
2.2 Electrocatalysts for PEMFCs 11
2.2.1 Platinum group metals (PGM) based catalysts 11
2.2.2 Non-PGM based catalysts 12
2.3 Catalyst supports for PGM nanoparticles 14
2.3.1 Carbon based materials 14
2.3.2 Carbon support corrosion 15
2.4 References 17
Ⅲ. Low temperature synthesis of new highly graphitized N-doped carbon for Pt fuel cell supports, satisfying DOE 2025 durability standards for both catalyst and support 20
3.1 Introduction 20
3.2 Experimental section 22
3.2.1 Synthesis of highly graphitized N-doped carbon (HGNC) 22
3.2.2 Platinum deposition on HGNC 22
3.2.3 Characterizations 22
3.2.4 Electrochemical measurements 23
3.2.5 MEA preparation and single cell tests 24
3.2.6 Online EFC/ICP-MS and EFC/DEMS analyses 25
3.2.7 Computational methods 26
3.3 Results and discussion 28
3.3.1 Synthesis of HGNC-X 28
3.3.2 Electrochemical performance and PEMFC durability tests 38
3.3.3 Quantum mechanics-based analysis 55
3.4 Conclusion 58
3.5 References 59
Ⅳ. Carbon-free core-shell type Pt/metal oxide catalyst with outstanding activity and durability for PEMFC 65
4.1 Introduction 65
4.2 Experimental section 68
4.2.1 Synthesis of metal oxide nanoparticles (MO NPs) 68
4.2.2 Synthesis of carbon-free Pt-coated MO NPs 68
4.2.3 Characterizations 68
4.2.4 Electrochemical measurements 70
4.2.5 MEA preparation and single cell tests 71
4.3 Results and discussion 73
4.3.1 Synthesis of Carbon-free Pt-coated MO NPs 73
4.3.2 Characterization of Pt-shell on MOs 77
4.3.3 Electrochemical performance 82
4.3.4 PEMFC performance and accelerated durability tests 84
4.4 Conclusion 96
4.5 References 97
Ⅴ. Summary 102
- URI
-
http://hdl.handle.net/20.500.11750/46398
http://dgist.dcollection.net/common/orgView/200000684451
- Degree
- Doctor
- Department
- Department of Energy Science and Engineering
- Publisher
- DGIST
- Related Researcher
-
-
Yu, Jong-Sung
- Research Interests Materials chemistry; nanomaterials; electrochemistry; carbon and porous materials; fuel cell; battery; supercapacitor; sensor and photochemical catalyst
-
- Files in This Item:
-
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- Appears in Collections:
- Department of Energy Science and Engineering Theses Ph.D.
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