열기상법으로 제조된 나노구조 Cu/ZnO 촉매의 성능평가 = Performance evaluation of Cu/ZnO nanostructure catalysts fabricated by thermal vapor evaporation

다국어 초록 (Multilingual Abstract)

Recent increase in need of micro power sources for portable and autonomous micro systems drives research on micro fuel cells and micro fuel reformers as a key component of micro power generation systems. Especially, the Si-based micro fuel systems are becoming more significant because of their compatibility with conventional micro-electro-mechanical-system (MEMS) technology and capability for the extension to chip size reforming system and fuel cells. However, these theologies have often suffered from the lack of appropriate materials or manufacturing routs although the limitations are shrinking because of the advent of new technologies and materials.
To address these issues, we present novel catalysts which can be used for micro reforming system and fabricated by sequential process of thermal vapour synthesis of single crystalline ZnO nanowire and physical adsorption of Cu. Due to less specific surface area and amount of CuO, the total performance of the methanol steam reforming for this approach was not good as compared to the commercialized Cu/ZnO/Al2O3 catalysts. However, this result reveals clearly the key role of single crystalline ZnO nanowire in terms of methanol adsorption site. Furthermore, this work suggests strongly that the Cu chemisorptions of single crystalline ZnO nanostructure be one of the promising methods to overcome the limitation of the commercialized catalysts.

목차 (Table of Contents)

• 1. 서론 1
• 1.1. 마이크로 개질기 연구 동향 3
• 1.1.1. 국내연구 동향 5
• 1.1.2. 국외연구 동향7
• 1.2. 메탄올 수용액의 개질반응 9
• 1.3. 본 연구의 동기 12
• 2. 실험 방법 15
• 2.1. Cu/ZnO 나노구조 촉매 제조 15
• 2.2. Cu/ZnO 나노구조 촉매의 성능 평가 17
• 2.3. Cu/ZnO 나노선 촉매를 이용한 마이크로 개질기 21
• 2.4. 마이크로 개질기의 성능 평가 시스템 26
• 3. 결과 및 토의 28
• 3.1. 상용 Cu/ZnO/Al2O3 촉매의 특성 분석 28
• 3.2. Cu/ZnO 나노선 촉매 제조 30
• 3.3. Cu/ZnO 나노선 촉매의 개질 성능 평가 43
• 3.4. Cu/ZnO 나노선 촉매를 이용한 마이크로 개질기 48
• 3.5. Cu/ZnO 나노선 촉매의 특성 비교 평가 53
• 4. 결론 59
• 참고 문헌 61