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Improvement of Gold Catalysts Supported by Cerium Phosphate for Oxygen-Reduction Reaction : 세륨 인산화물에 의한 금 전기화학 촉매의 산소 환원 반응 특성 향상

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dc.contributor.advisor박병우-
dc.contributor.author변수진-
dc.date.accessioned2017-07-14T03:15:11Z-
dc.date.available2017-07-14T03:15:11Z-
dc.date.issued2013-02-
dc.identifier.other000000009597-
dc.identifier.urihttps://hdl.handle.net/10371/123420-
dc.description학위논문 (석사)-- 서울대학교 대학원 : 재료공학부(하이브리드 재료), 2013. 2. 박병우.-
dc.description.abstractThe oxygen-reduction reaction was investigated on gold supported by cerium phosphate in an alkaline electrolyte. The composites with different Au/CePO4 ratios were prepared by co-sputtering. Two-electron reduction of oxygen to hydrogen peroxide has been found with the Au catalysts, while the Au/CePO4 nanocomposite exhibited the four-electron reduction in a same potential region. This enhancement was attributed to the electronic interactions between Au and CePO4, which could be explained by shifting of Au 4f toward lower binding energy. Also, catalytic activity of CePO4 contributed to increase the ORR activity and was confirmed by chronoamperometry. The synergy between Au and CePO4 was unprecedented activity from Au/AlPO4 nanocomposite catalyst.-
dc.description.tableofcontentsAbstract i
List of Figures iv
Chapter 1. Overview
1.1. Introduction of Fuel Cells 1
1.2. Fundamental of Electrocatalyst 5
1.3. Mechanism of Oxygen Reduction 8
1.4. Electrocatalysts for Oxygen Reduction Reaction 11
1.5. Modification of Catalytic Activity 15
1.6. References 18
Chapter 2. Improvement of Gold Catalyst Supported by Cerium Phosphate
for Oxygen-Reduction Reaction
2.1. Introduction 21
2.1.1. Non-Pt Electrocatalyst and Oxygen Reduction on Au
2.2. Experimental Section 23
2.3. Results and Discussion
2.3.1. Gold Surface Structure and Active Surface Areas 25
2.3.2. Oxygen Reduction Reaction of Nanocomposites 27
2.3.3. Electronic Interactions between Au and CePO4 29
2.3.4. Catalytic Behaviors of CePO4 : Reduction of Hydrogen Peroxide 31
2.3.5. Estimation of Grain Sizes 34
2.4. Conclusions 36
2.5. References 37
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dc.formatapplication/pdf-
dc.format.extent1783952 bytes-
dc.format.mediumapplication/pdf-
dc.language.isoen-
dc.publisher서울대학교 대학원-
dc.subjectGold-
dc.subjectCerium phosphate-
dc.subjectElectrocatalyst-
dc.subjectOxygen-reduction reaction-
dc.subjectNanocomposite-
dc.titleImprovement of Gold Catalysts Supported by Cerium Phosphate for Oxygen-Reduction Reaction-
dc.title.alternative세륨 인산화물에 의한 금 전기화학 촉매의 산소 환원 반응 특성 향상-
dc.typeThesis-
dc.description.degreeMaster-
dc.citation.pagesvi, 44-
dc.contributor.affiliation공과대학 재료공학부(하이브리드 재료)-
dc.date.awarded2013-02-
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