Akamine Yoshiki, Nishino Fumiya, Yamashita Takashi, Tsushida Masayuki, Awaya Keisuke, Machida Masato, Zahan Syeda Mushrifa, Dekel Dario R, Ohyama Junya
Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan.
Technical Division, Faculty of Engineering, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan.
ACS Appl Mater Interfaces. 2024 Dec 18;16(50):69316-69323. doi: 10.1021/acsami.4c15120. Epub 2024 Dec 8.
The effect of the carbon support─Ketjenblack (C) and Vulcan (C)─on the Ni/C catalyst properties toward alkaline hydrogen oxidation reaction (HOR) was investigated. Both Ni/C and Ni/C presented improved catalytic activity with an increase in Ni particle size; however, Ni/C showed activity significantly higher than that of Ni/C at the same particle size. The reason for the difference in the HOR activity due to the types of carbon support was revealed to be the difference in the 3D structure of Ni nanoparticles determined by metal-support interaction, which is changed by the surface structures of carbon supports. These findings bring light to the critical importance of the metal-support interaction in the development of the HOR catalysts.
研究了碳载体（科琴黑（C）和瓦肯（C））对镍/碳催化剂碱性氢氧化反应（HOR）性能的影响。随着镍粒径的增加，Ni/C和Ni/C的催化活性均有所提高；然而，在相同粒径下，Ni/C的活性明显高于Ni/C。结果表明，由于碳载体类型不同导致HOR活性存在差异的原因是，金属-载体相互作用决定的镍纳米颗粒三维结构存在差异，而这种差异会因碳载体的表面结构而改变。这些发现揭示了金属-载体相互作用在HOR催化剂开发中的至关重要性。
