Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | 유종성 | - |
| dc.contributor.author | Gisang Park | - |
| dc.date.accessioned | 2023-09-18T21:00:43Z | - |
| dc.date.available | 2023-09-18T21:00:43Z | - |
| dc.date.issued | 2023 | - |
| dc.identifier.uri | http://hdl.handle.net/20.500.11750/46399 | - |
| dc.identifier.uri | http://dgist.dcollection.net/common/orgView/200000684465 | - |
| dc.description | Single-layer graphene; metal nanoparticle; carbon defect; oxygen evolution reaction; nitrogen reduction reaction; ammonia | - |
| dc.description.tableofcontents | Abstract i List of contents ii List of tables iv List of figures v I. First chapter: Controllable synthesis of single-layer graphene over cobalt nanoparticles and insight into active sites for efficient oxygen evolution 1 1.1 Introduction 1 1.2 Experimental Section 3 1.2.1 Materials 3 1.2.2 Prepartion of SiO2 spheres 4 1.2.3 Preparation of cobalt silicate (Co2SiO4) 4 1.2.4 Preparation of Co@SG 4 1.2.5 Preparation of Co@N-SG 5 1.2.6 Preparation of Co@MG 5 1.2.7 Preparation of Co NPs 5 1.2.8 Preparation of defect-free Co@SG and hollow SG and N-SG cages 6 1.2.9 Electrode preparation on glassy carbon and Ni foam 6 1.3 Results and discussion 7 1.3.1 Preparation and Characterization 7 1.3.2 Electrochemical OER Performance 18 1.3.3 OER Mechanism 23 1.3.4 Magnet-Assisted Binder-Free Electrode for Efficient OER 25 1.3.5 Contribution to Catalytic Activity 28 1.3.6 The effect of carbon vacancies 33 1.3.7 Density Functional Theory (DFT) Calculations 34 1.4 Conclusion 40 II. Second chapter: The Influence of Graphene Overlayer on Nickel for Selective Nitrogen Electroreduction to Ammonia 42 2.1 Introduction 42 2.2 Experimental section 45 2.2.1 Material 45 2.2.2 Material characterization 45 2.2.3 Electrochemical measurement 45 2.2.4 Determination of ammonia yield and Faradaic efficiency 46 2.2.5 Detection of hydrazine in the electrolyte 47 2.3 Results and discussions 48 2.3.1 Preparation of Ni@SG, Ni@MG, and DF Ni@SG NPs 48 2.3.2 Preparation of the graphene-coated Ni foam electrodes 49 2.3.3 Preparation of GDL electrodes for NRR 50 2.3.4 Electrochemical NRR 51 2.3.5 Parasitic oxygen reduction reaction during NRR 55 2.3.6 XPS analyses 58 2.4 Conclusion 60 III. References 62 3.1 Reference for the first chapter 62 3.2 Reference for the second chapter 67 IV. Abstract (국문요약) 70 |
- |
| dc.format.extent | 70 | - |
| dc.language | eng | - |
| dc.publisher | DGIST | - |
| dc.title | Electrochemical Water Oxidation and Nitrogen Reduction Reaction Using Single-Layer Graphene-Coated Transition Metal Nanocatalysts | - |
| dc.title.alternative | 차세대 에너지 생산을 위한 단층 그래핀 코팅 금속 나노촉매 | - |
| dc.type | Thesis | - |
| dc.identifier.doi | 10.22677/THESIS.200000684465 | - |
| dc.description.degree | Doctor | - |
| dc.contributor.department | Department of Energy Science and Engineering | - |
| dc.contributor.coadvisor | Jongmin Choi | - |
| dc.date.awarded | 2023-08-01 | - |
| dc.publisher.location | Daegu | - |
| dc.description.database | dCollection | - |
| dc.citation | XT.ED 박18 202308 | - |
| dc.date.accepted | 2023-09-14 | - |
| dc.contributor.alternativeDepartment | 에너지공학과 | - |
| dc.subject.keyword | Single-layer graphene | - |
| dc.subject.keyword | metal nanoparticle | - |
| dc.subject.keyword | carbon defect | - |
| dc.subject.keyword | oxygen evolution reaction | - |
| dc.subject.keyword | nitrogen reduction reaction | - |
| dc.subject.keyword | ammonia | - |
| dc.contributor.affiliatedAuthor | Gisang Park | - |
| dc.contributor.affiliatedAuthor | Jong-Sung Yu | - |
| dc.contributor.affiliatedAuthor | Jongmin Choi | - |
| dc.contributor.alternativeName | 박기상 | - |
| dc.contributor.alternativeName | Jong-Sung Yu | - |
| dc.contributor.alternativeName | 최종민 | - |
| dc.rights.embargoReleaseDate | 2028-08-31 | - |
- Files in This Item:
-
There are no files associated with this item.
- Appears in Collections:
- Department of Energy Science and Engineering Theses Ph.D.
Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.