DGIST Scholar: A Non-precious Metal Oxide based Bi-functional Catalyst for Oxygen Reduction and Evolution Reactions in Alkaline medium

Title

A Non-precious Metal Oxide based Bi-functional Catalyst for Oxygen Reduction and Evolution Reactions in Alkaline medium

Alternative Title

비금속 물질을 이용하여 효율적인 산소 환원 반응과 산소 생성 반응을 위한 촉매 연구

DGIST Authors

Ahn, Tae Eun ; Shanmugam, Sangaraju ; Kim, Soon Hyun

Advisor

Shanmugam, Sangaraju

Co-Advisor(s)

Kim, Soon Hyun

Issued Date

2014

Awarded Date

2014. 2

Citation

Ahn, Tae Eun. (2014). A Non-precious Metal Oxide based Bi-functional Catalyst for Oxygen Reduction and Evolution Reactions in Alkaline medium. doi: 10.22677/thesis.2262548

Type

Thesis

Subject

Bi-functional catalyst ; Oxygen reduction reaction ; Oxygen evolution reaction ; Cobalt oxide ; 산화 /환원 촉매 ; 산소 환원 반응 ; 산소 산화 반응 ; 코발트 산화물

Abstract

Finite fossil fuels and destroyed nature make us to rely on develop renewable energy resources. One of the promising energy systems is metal-air battery which meets drawbacks of traditional metal-ion battery. The redox reaction of metal and oxygen (O2) in air generates electrical energy. A key issue of metal-air battery is to improve the efficiency of cathode that occur redox reaction of O2 such as oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). ⓒ 2014 DGIST

Table Of Contents

Ⅰ. INTRODUCTION 1--
1.1. Foreword 1--
1.2. Characteristics of metal-air batteries 2--
1.2.1. Advantages & disadvantages of metal-air batteries 2--
1.2.2. Basic principles of metal-air batteries 4--
1.3. Studies of bi-functional catalysts 8--
1.3.1. Various types of bi-functional catalysts 8--
1.3.2. ORR & OER studies 10--
1.4. Theoretical background 14--
1.4.1. Concept of doping 14--
1.4.2. Characteristic of materials 15--
1.5. Objectives of work 16--
Ⅱ. EXPERIMENTAL 18--
2.1. Chemicals 18--
2.2. Synthesis of Graphene oxide (GO) 18--
2.3. Synthesis of catalysts 19--
2.3.1. Preparation of cobalt oxide/GO 19--
2.3.2. Preparation of manganese doped cobalt oxide/GO 19--
2.3.3. Preparation of nitrogen doped cobalt oxide/GO 19--
2.3.4. Preparation of cobalt hydroxide/GO 20--
2.4. Characterizations 20--
2.4.1. Morphological analysis 20--
2.4.2. Elemental characterization 21--
2.4.3. Electrochemical studies 21--
Ⅲ. RESULTS $ DISCUSSIONS RESULTS 22--
PART 1: Studies of of catalysts with different doping 22--
3.1. Morphology studies of catalysts 22--
3.2. Structural studies of catalysts 22--
3.3. Chemical and electronic properties of catalysts 25--
3.4. Electrochemical activities of catalysts 27--
3.4.1. Oxygen reduction reaction activities 27--
3.4.2. Oxygen evolution reaction activities 31--
3.4.3. Evaluation for bi-functional catalyst 32--
PART 2: Studies of OER mechanism 33--
3.5. Comparison of catalysts morphologies 33--
3.6. Comparison of catalyst structure 33--
3.7. Comparison of chemical and electronic properties 37--
3.8. Electrochemical studies 39--
3.8.1. Oxygen reduction reaction activities 39--
3.8.2. Oxygen evolution reaction activities 41--
Ⅳ. CONCLUSIONS 45--
REFERENCE 46

URI

http://dgist.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002262548
http://hdl.handle.net/20.500.11750/1356

DOI

10.22677/thesis.2262548

Degree

Master

Department

Energy Systems Engineering

Publisher

DGIST

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