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논문 기본 정보
- 자료유형
- 학위논문
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- 2013
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2019
2018
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Carbon-supported platinum (Pt/C) has been widely employed as a cathode catalyst for oxygen reduction reaction (ORR) of polymer electrolyte membrane fuel cells (PEMFCs). Although Pt among the elements on the earth is known to be the best for ORR , its ORR activity and durability should be improved for the commercialization of PEMFCs.
In this work, carbon-supported Pt-based catalyst with various ratios of metallic component were prepared by acid-leaching the heat-treated catalyst precursors, PtCux/C (x = 1, 3, 5) and (PtAux)1Cu3/C (x = 0, 0.1, 0.3, 0.5). After acid-treatment, both series of catalysts presented a multiple core-shell structure. Acid-treated catalysts showed varied ORR performance depending on their composition. In case of acid-treated PtCux/C catalysts, the ORR performance was found to be improved with increasing Cu contents in catalyst precursor. Compared to a commercial Pt/C, acid-treated PtCux/C showed 2.3-fold enhanced ORR activities, while the improvement in their durabilities was negligible. The addition of Au was very effective to enhance the durability of catalyst, though there was the optimum amount of Au for the best ORR activity as well as durability. Among the catalysts tested in this study, PtAu0.3Cu3/C showed the best activity and durability.
In this work, carbon-supported Pt-based catalyst with various ratios of metallic component were prepared by acid-leaching the heat-treated catalyst precursors, PtCux/C (x = 1, 3, 5) and (PtAux)1Cu3/C (x = 0, 0.1, 0.3, 0.5). After acid-treatment, both series of catalysts presented a multiple core-shell structure. Acid-treated catalysts showed varied ORR performance depending on their composition. In case of acid-treated PtCux/C catalysts, the ORR performance was found to be improved with increasing Cu contents in catalyst precursor. Compared to a commercial Pt/C, acid-treated PtCux/C showed 2.3-fold enhanced ORR activities, while the improvement in their durabilities was negligible. The addition of Au was very effective to enhance the durability of catalyst, though there was the optimum amount of Au for the best ORR activity as well as durability. Among the catalysts tested in this study, PtAu0.3Cu3/C showed the best activity and durability.
목차
List of tables iiiList of figures ivAbstract viii1. 서 론 12. 실 험 62. 1. 시약 및 재료 62. 2. 실험 방법 62. 2. 1. PtCu 합금 촉매 제조 62. 2. 2. PtAuCu 합금 촉매 제조 72. 3. 특성 분석 82. 3. 1. X선 회절 분석 82. 3. 2. 전자현미경 분석 82. 3. 3. 유도결합 플라즈마 분광 분석 82. 3. 4. 전기화학적 특성분석 및 산소환원반응 측정 92. 3. 5. 내구성 평가 93. 결과 및 고찰 133. 1. PtCu 합금 촉매 133. 2. PtAuCu 합금 촉매 294. 결 론 58참고문헌 61
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