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Effects of Carbon Support Nanostructures on the Reactivity of a Ru Nanoparticle Catalyst in a Hydrogen Transfer Reaction
Organic Process Research & Development ( IF 3.4 ) Pub Date : 2018-08-16 00:00:00 , DOI: 10.1021/acs.oprd.8b00207
Takeharu Yoshii 1 , Kazuki Nakatsuka 1 , Tatsuya Mizobuchi 1 , Yasutaka Kuwahara 1, 2 , Hiroyuki Itoi 3 , Kohsuke Mori 1, 2, 4 , Takashi Kyotani 5 , Hiromi Yamashita 1, 2
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Carbon materials have been extensively studied for several decades as catalytic supports because of their high surface area and porous structures. However, carbon black supports, such as Ketjen black or Vulcan XC-72, have rarely been utilized for organic syntheses, though they have recently been widely studied in electrocatalysts. In this study, we examined Ketjen black with high surface area and high pore volume as a support for Ru nanoparticles (NPs) in the catalytic transfer hydrogenation (CTH) reaction. The performance of the Ru NP catalyst supported on Ketjen black was superior to that on other carbon supports. The catalysts were structurally characterized using X-ray diffraction, X-ray absorption fine structure, transmission electron microscopy, CO chemisorption, and N2 adsorption/desorption measurements. A clear correlation was observed among the micro- and mesopore volume, the adsorption capacity of reactant, and the catalytic activity, and therefore, micro- and mesopores in Ketjen black were found to adsorb the reactant, acetophenone, and thus play a crucial role in achieving high catalytic performance in the CTH reaction.

中文翻译:

碳载体纳米结构对Ru纳米颗粒催化剂在氢转移反应中反应性的影响

碳材料由于其高的表面积和多孔的结构已被广泛研究了数十年作为催化载体。但是,碳黑载体,例如科琴黑或Vulcan XC-72,很少用于有机合成,尽管最近在电催化剂中进行了广泛研究。在这项研究中,我们研究了具有高表面积和高孔体积的科琴黑,作为催化转移氢化(CTH)反应中Ru纳米颗粒(NPs)的载体。在科琴黑上负载的Ru NP催化剂的性能优于在其他碳载体上的。使用X射线衍射,X射线吸收精细结构,透射电子显微镜,CO化学吸附和N 2对催化剂进行结构表征吸附/解吸测量。在微孔和中孔的体积,反应物的吸附能力和催化活性之间观察到明显的相关性,因此,发现科琴黑中的微孔和中孔吸附了反应物苯乙酮,因此在苯乙酮中起关键作用。在CTH反应中实现高催化性能。
更新日期:2018-08-16
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