催化作用
钴
苯酚
环己醇
选择性
转移加氢
化学
热解
脱氢
纳米颗粒
碳纤维
无机化学
化学工程
材料科学
有机化学
纳米技术
钌
复合材料
工程类
复合数
作者
Yunqing Nie,Wei Lin,Yongsheng Zhang,Yi Chen,Renfeng Nie
出处
期刊:Dalton Transactions
[The Royal Society of Chemistry]
日期:2022-01-01
卷期号:51 (41): 15983-15989
被引量:1
摘要
Selective hydrogenation of biomass-derived phenols into cyclohexanones or cyclohexanols is an industrially important fundamental reaction. Traditional processes commonly used noble metal catalysts and high-pressure H2 as a donor, which are not cost-saving and selectivity-controllable. Herein, we fabricated highly dispersed cobalt nanoparticles (<5 nm) supported on mesoporous N-doped carbon spheres (Co-CoOx/NCS) via an ion exchange-pyrolysis strategy, which showed excellent activity and good selectivity in one-pot transfer hydrogenation of phenol to cyclohexanol with 2-PrOH as a hydrogen donor. It was found that the surface cobalt species of Co-CoOx/NCS could be tuned by simply adjusting the pyrolysis temperature, thus resulting in a boosted catalytic performance of Co-CoOx/NCS-600 (obtained at 600 °C), which was more active than other counterparts as well as Co/NCS-600 and Co3O4/NCS-600. Controlled experiments revealed that Co0 was mainly responsible for dehydrogenation of 2-PrOH, while phenol hydrogenation could be promoted by Lewis acidic Coδ+ (especially by Co2+), and the coexistence of Co0 and Coδ+ was indispensable for boosting the CTH activity of Co-CoOx/NCS. This work provides an economical and environmentally-friendly method for the selective hydrogenation of phenols into value-added chemicals.
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