| 학회 |
한국재료학회 |
| 학술대회 |
2015년 가을 (11/25 ~ 11/27, 부산 해운대그랜드호텔) |
| 권호 |
21권 2호 |
| 발표분야 |
C. 에너지 재료 |
| 제목 |
Oxygen evolution reaction characteristics of NiCo2O4 electrodes for water electrolysis |
| 초록 |
A polymer electrolyte membrane water electrolysis system can produce high purity hydrogen gases relatively in highly efficient way. However, production amount of the hydrogen gas is small and noble metal catalysts are also needed because of the reaction in acidic environment. Also, additional drying step in order to remove water contained in the hydrogen is required. These generally increase the manufacturing costs significantly. For these reasons, a coupling of high efficiency and price reduction of the water electrolysis system has been widely studied. Among them, the use of alkaline anion-exchange membrane (AAEM) water electrolysis can produce high purity hydrogen without noble metal catalyst. The generation of the high purity hydrogen without moisture can be produced directly because the cathode is not in the water in this method. Synthetic nickel-cobalt oxide (NiCo2O4) as an oxygen generating catalyst has low oxygen generation efficiency compared with noble metal catalyst, but low manufacturing cost is the greatest advantage. In this study, the characteristics of synthesized NiCo2O4 catalytic material for AAEM method have been investigated to have a comprehensive understanding of the catalytic properties of NiCo2O4. A mixture of nickel and cobalt chlorides was used as the precursor for the preparation of the nickel cobaltite gels. The crystallinity and composition of the synthetic NiCo2O4 were analyzed by x-ray diffraction and energy-dispersive spectroscopy. Microstructural properties of the synthetic NiCo2O4 powder were observed by scanning electron microscope and transmission electron microscope. The catalytic properties are also investigated by cyclic voltammetry and rotating disc electrode measurements. |
| 저자 |
Yangdo Kim1, Sung Mook Choi2, Jae Ho Lee3, Hyeun Soo Jin1, Yoosei Park1, Chansu Park1, Taewoo Koo1
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| 소속 |
1Pusan National Univ., 2Korea Institute of Materials Science (KIMS), 3Hongik Univ. |
| 키워드 |
Water electrolysis; Oxygen evolution reaction; NiCo<SUB>2</SUB>O<SUB>4</SUB> powders
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| E-Mail |
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