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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
Authors
Thanh-Nhan Tran
DGIST Authors
Tran, Thanh-Nhan; Jang, Yun HeeYu, Jong-Sung
Advisor(s)
유종성
Co-Advisor(s)
Yun Hee Jang
Issue Date
2020
Available Date
2020-06-23
Degree 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
DOI
10.22677/Theses.200000281742
Degree
Doctor
Department
Energy Science&Engineering
University
DGIST
Related Researcher
  • Author Yu, Jong-Sung Light, Salts and Water Research Group
  • Research Interests Materials chemistry; nanomaterials; electrochemistry; carbon and porous materials; fuel cell; battery; supercapacitor; sensor and photochemical catalyst
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Collection:
Department of Energy Science and EngineeringThesesPh.D.


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