Preparation and Evaluation of Non-precious-metal Materials as Electrocatalysts and Catalyst Supports for Oxygen Reduction Reaction
- Title
- Preparation and Evaluation of Non-precious-metal Materials as Electrocatalysts and Catalyst Supports for Oxygen Reduction Reaction
- Author(s)
- Thanh-Nhan Tran
- DGIST Authors
- Tran, Thanh-Nhan ; Jang, Yun Hee ; Yu, Jong-Sung
- Advisor
- 유종성
- Co-Advisor(s)
- Yun Hee Jang
- Issued Date
- 2020
- Awarded Date
- 2020-02
- Type
- Thesis
- Description
- Non-precious metal, electrocatalyst, platinum, oxygen reduction reaction, PEMFC.
- Table Of Contents
-
Abstract i
Acknowledgements iii
Table of Contents iv
List of Tables vii
List of Figures viii
I. Introduction - 1 -
1.1 Motivation - 1 -
1.2 Objective of this work - 2 -
1.3 Theses outline - 2 -
1.4 References - 3 -
II. Background and literature review - 4 -
2.1 History of Fuel cells - 4 -
2.2 Types and Applications of Fuel cells - 4 -
2.2.1 Phosphoric Acid Fuel Cell (PAFC) - 5 -
2.2.2 Molten carbonate fuel cell (MCFC) - 5 -
2.2.3 Solid oxide fuel cells (SOFCs) - 5 -
2.2.4 Alkaline fuel cells (AFCs) - 5 -
2.2.5 Proton exchange membrane fuel cells (PEMFCs) - 6 -
2.3 Thermodynamics and Kinetics of Fuel Cells - 6 -
2.3.1 Thermodynamics of fuel cells - 6 -
2.3.2 Kinetics of fuel cell - 7 -
2.4 Introduction to PEMFCs - 8 -
2.4.1 Structure of PEMFCs - 8 -
2.4.2 Challenges of PEMFCs - 9 -
2.5 PEMFC electrocatalysts - 10 -
2.5.1 Non-platinum metal groups electrocatalyst - 10 -
2.5.2 Electrocatalyst derived from pyrolyzed MOFs - 12 -
2.5.3 Platinum-based electrocatalysts - 13 -
2.6 Carbon supports for Pt-based catalysts - 14 -
2.6.1 Conventional carbon supports - 14 -
2.6.2 Heteroatoms doped carbon materials - 14 -
2.7 References - 15 -
III. Physical and electrochemical characterization - 17 -
3.1 Physical characterization - 17 -
3.1.1 Scanning electron microscopy - 17 -
3.1.2 Transmission electron microscopy - 17 -
3.1.3 X-ray diffraction - 17 -
3.1.4 Energy dispersive spectrocopy - 18 -
3.1.5 X-ray photoelectron spectrocopy - 18 -
3.1.6 Raman spectroscopy - 18 -
3.1.7 Four prope conductivity measurement - 18 -
3.1.8 Thermal gravity analysis (TGA) - 19 -
3.2 Electrochemical characterization - 19 -
3.2.1 Rotating ring disk electrode (RRDE) - 19 -
3.2.2 Linear Sweep Voltammetry (LSV) - 20 -
3.2.3 Cyclic voltammetry - 20 -
3.2.4 Measurement Parameter - 21 -
3.2.5 Preparation of Catalyst Ink and Working Electrode - 22 -
3.2.6 Half-cell accelerated durability test (ADT) - 22 -
3.2.7 PEMFC measurements - 23 -
3.3 Reference - 23 -
IV. Iron-polypyrrole electrocatalyst with remarkable activity and stability for oxygen reduction reaction in both alkaline and acidic conditions: A comprehensive assessment of catalyst preparation sequence - 25 -
4.1 Introduction - 25 -
4.2 Experiment Section - 26 -
4.3 Results and discussion - 27 -
4.4 Conclusions - 49 -
4.5 References - 50 -
V. Fe-N-functionalized carbon electrocatalyst derived from a zeolitic imidazolate framework for oxygen
reduction: Fe and NH3 treatment effects - 57 -
5.1 Introduction - 57 -
5.2 Experimental section - 59 -
5.2.1 SynTheses of ZIF-8 material - 59 -
5.2.2 Catalyst preparation - 59 -
5.3 Results and discussion - 59 -
5.3.1 SynTheses and physicochemical characterization - 59 -
5.3.2 ORR catalytic activity - 68 -
5.3.3 PEMFC single cell performance - 71 -
5.3.4 MeOH tolerance and durability test - 72 -
5.4 Conclusions - 73 -
5.5 References - 74 -
V. Synergistic CoN-Decorated Pt Catalyst on Two-Dimensional Porous Co-N-Doped Carbon Nanosheet for
Enhanced Oxygen Reduction Activity and Durability - 82 -
6.1 Introduction - 82 -
6.2 Experimental Section - 84 -
6.2.1 Reagent and chemicals - 84 -
6.2.2 SynTheses of ZIF-67 materials - 84 -
6.2.3 SynTheses of nanoflake-shaped NF-CoZIF - 84 -
6.2.4 SynTheses of CoN-Pt/CoNC-bulk, CoN-Pt/CoNC-2D and Pt/CoNC-2D materials - 84 -
6.3 Results and discussion - 85 -
6.3.1 SynTheses and materials characterization - 85 -
6.3.2 Electrocatalytic activity of as-synthesized materials towards ORR - 97 -
6.3.3 Long-term durability test - 99 -
6.4 Conclusion - 102 -
6.5 References - 103 -
VII. Summary and Future work - 108 -
7.1 Summary - 108 -
7.2 Future work - 109 -
List of publications - 110 -
- URI
-
http://dgist.dcollection.net/common/orgView/200000281742
http://hdl.handle.net/20.500.11750/12005
- Degree
- Doctor
- Department
- Energy Science&Engineering
- Publisher
- DGIST
- Related Researcher
-
-
Jang, Yun Hee
- Research Interests Multiscale molecular modeling (quantum mechanics calculation; molecular dynamics simulation) : Supercomputer-assisted molecular-level understanding of materials and their chemistry; which leads to rational design of high-performance organic-inorganic-hybrid materials for clean and renewable energy as well as low-energy-consumption electronic devices
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- Appears in Collections:
- Department of Energy Science and Engineering Theses Ph.D.
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