S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Material Science and Engineering (재료공학부) Theses (Master's Degree_재료공학부)
Improvement of Gold Catalysts Supported by Cerium Phosphate for Oxygen-Reduction Reaction
세륨 인산화물에 의한 금 전기화학 촉매의 산소 환원 반응 특성 향상
- 공과대학 재료공학부(하이브리드 재료)
- Issue Date
- 서울대학교 대학원
- 학위논문 (석사)-- 서울대학교 대학원 : 재료공학부(하이브리드 재료), 2013. 2. 박병우.
- The 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.