표제지
요약
ABSTRACT
목차
1. 서론 16
2. 이론적 배경 18
2.1. 갈륨 액체금속 18
3. 실험 19
3.1. 알루미늄 표면 식각 19
3.2. 갈륨 액체금속의 준비 19
3.3. 전해질 제조 20
3.4. 수상 치환 장치 구성 20
3.5. 물리적, 화학적 특성 분석 21
4. 결과 및 고찰 22
4.1. 갈륨과 알루미늄의 특성 22
4.2. 갈륨-알루미늄-물 반응의 메커니즘 26
4.3. 알루미늄을 이용한 수소 생산의 성능 35
4.4. 갈륨 촉매의 재사용 44
4.5. 반응 부산물 48
5. 결론 52
6. 참고문헌 53
Figure 4.1.1. (a) SEM image of the Ga and EDS elemental mapping of Ga and O. EDS elemental composition analysis is shown in the insert of the figure. (b)... 24
Figure 4.1.2. Optical microscope images of the Al for (a) pristine and (b) after HF treatment state. 25
Figure 4.2.1. SEM images of the Al surface in the reaction. (a) Boundary where Al and Ga start to react. (b) Al before the reaction. (c) Al oxidized after... 29
Figure 4.2.2. EDS elemental mapping of Figure 4.2.1. (a) and EDS elemental composition analysis at four sites in Figure 4.2.1. (a). 30
Figure 4.2.3. Surface analysis of reacted Al at the boundary where Al and Ga start to react. Al surfaces were washed with (a) de-ionized water and (b)... 31
Figure 4.2.4. SEM images of (a) activated Ga in the reaction and (c) as-is Ga. (b) and (d) EDS elemental composition analysis of (a) and (c), respectively.... 33
Figure 4.2.5. SEM-EDS elemental mapping of Al, O, Ga, Na, and Cl for activated Ga in the reaction. 34
Figure 4.3.1. Hydrogen generation performances of Al-water reaction with or without Ga in 0.4 M NaCl solution at 35 ℃. 37
Figure 4.3.2. SEM images and the corresponding AFM images of Al surfaces after hydrogen generation reaction: aluminum corroded in 0.4 M NaCl solution... 38
Figure 4.3.3. (a) SEM-EDS elemental mapping of Al, O, and Ga for aluminum corroded in 0.4 M NaCl solution with Ga. (b) Corresponding EDS elemental... 39
Figure 4.3.4. Hydrogen generation performances using Al corroded in 0.4 M HCl, 0.4 M NaOH, and 0.4 M NaCl solutions at 35 ℃. Ga was used only in... 42
Figure 4.3.5. Hydrogen generation yields of Al-water reaction activated by Ga in 0.4 M NaCl solution at different temperatures. 43
Figure 4.4.1. Hydrogen generation yield in 0.4M NaCl solution at the temperature 35 ℃ when Ga reused 5 times. 46
Figure 4.4.2. XRD patterns of Ga before and after hydrogen generation. 47
Figure 4.5.1. Analysis of the reaction by-products. (a) Photographic image. (d) EDS elemental composition analysis. (c) XRD pattern. 50
Figure 4.5.2. Analysis of the reaction by-products. (a) XPS survey spectrum. (b) High-resolution XPS spectra of (b) Al 2p, (c) O 1s and (d) Ga 2p. The... 51