Intermetallic YIr2 nanoparticles with negatively charged Ir active sites for catalytic hydrogenation of cyclohexanone to cyclohexanol
Intermetallic YIr2 nanoparticles with negatively charged Ir active sites for catalytic hydrogenation of cyclohexanone to cyclohexanol
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具有带负电 Ir 活性位点的金属间 YIr2 纳米颗粒用于环己酮催化加氢制环己醇
DOI：
10.1039/d2cy00198e
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发表时间：
2022
影响因子：
5
通讯作者：
Mizoguchi Hiroshi
中科院分区：
文献类型：
--
作者：
Kobayashi Yasukazu;Tada Shohei;Kondo Masaru;Fujiwara Kakeru;Mizoguchi Hiroshi
使用熔盐法以Y2 O3作为Y源制备了具有高表面积（55 m2 g-1）的金属间化合物YIr 2纳米颗粒。合金化纳米颗粒催化环己酮加氢为环己醇类似于Pt/C催化剂，而Y2 O3-/SiO2负载的Ir不产生环己醇。由于我们通过密度泛函理论计算发现，带负电荷的Ir离子在YIr 2中的电子构型接近于Pt 0，因此YIr 2的独特催化活性可能主要是由于从Y到Ir的电荷转移。
Intermetallic YIr2 nanoparticles with a high surface area (55 m2 g−1) were prepared from Y2O3 as a Y source using a molten salt method. The alloyed nanoparticles catalyzed the hydrogenation of cyclohexanone to cyclohexanol similarly to the Pt/C catalyst, whereas Y2O3-/SiO2-supported Ir produced no cyclohexanol. Because we found via density functional theory calculations that the electronic configuration of the negatively charged Ir ion in YIr2 was close to Pt0, the unique catalytic activity in YIr2 could mainly be due to the charge transfer from Y to Ir.