Flower-like nickel oxide (NiO) catalysts were coated on NiCrAl alloy foam using a hydrothermal method. The structural, morphological, and chemical bonding properties of the NiO catalysts coated on the NiCrAl alloy foam were investigated by field-emission scanning electron microscopy, scanning electron microscopy-energy dispersive spectroscopy, Xray diffraction, and X-ray photoelectron spectroscopy, respectively. To obtain flower-like morphology of NiO catalysts on the NiCrAl alloy foam, we prepared three different levels of pH of the hydrothermal solution: pH-7.0, pH-10.0, and pH-11.5. The NiO morphology of the pH-7.0 and pH-10.0 samples exhibited a large size plate owing to the slow reaction of the hydroxide (OH−) and nickel ions (Ni+) in lower pH than pH-11.5. Flower-like NiO catalysts (~4.7 μm-6.6 μm) were formed owing to the fast reaction of OH− and Ni2+ by increased OH− concentration at high pH. Thus, the flower-like morphology of NiO catalysts on NiCrAl alloy foam depends strongly on the pH of the hydrothermal solution.

1. 서 론
 2. 실험 방법
 3. 결과 및 고찰
 4. 결 론
 Acknowledgements
 References

• 신동요(서울과학기술대학교 신소재공학과) | Dong-Yo Sin
• 이은환(서울과학기술대학교 신소재공학과) | Eun-Hwan Lee
• 박만호((주) Alantum) | Man-Ho Park
• 안효진(서울과학기술대학교 신소재공학과) | Hyo-Jin Ahn Corresponding author