Trace amounts of Cu(OAc)2 boost the efficiency of cumene oxidation catalyzed by carbon nanotubes washed with HCl,Catalysis Science & Technology

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Trace amounts of Cu(OAc)2 boost the efficiency of cumene oxidation catalyzed by carbon nanotubes washed with HCl
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2020-03-11 , DOI: 10.1039/c9cy02536g
Jie Deng _{1,

2,

3,

4,

5} , Yuhang Li _{1,

5,

6,

7,

8} , Yonghai Cao _{1,

2,

3,

4,

5} , Hongjuan Wang _{1,

2,

3,

4,

5} , Hao Yu _{1,

2,

3,

4,

5} , Qiao Zhang _{1,

5,

6,

7,

8} , Jiangliang Zuo _{1,

5,

6,

7,

8} , Feng Peng _{1,

5,

6,

7,

8}

Affiliation

The oxidation of hydrocarbons to high value-added intermediates is significant in industrial manufacture. It is of great significance to develop low-cost, high-activity catalytic systems. In this study, carbon nanotubes (CNTs) were used as catalysts and cumene was used as a substrate to be oxidized into high value-added peroxides, alcohols, and ketones. By adding trace amounts of Cu(OAc)₂ (1 ppm of CNTs), the conversion of cumene greatly increased to 54.2% from 38.5%, and the selectivity of alcohol increased from 25.1% to 44.7%, indicating that the trace amounts of Cu(OAc)₂ could significantly modulate the reactivity and product selectivity. The mechanism study has shown that this promoting effect results from the presence of chlorine adsorbed on the carbon surface caused by HCl washing. This adsorbed chlorine is extremely unstable during the reaction and interacts with Cu(OAc)₂ to form a Cu–Cl component, thus accelerating the decomposition of peroxides and promoting the activity of the reaction. This study demonstrates that the pretreatment of carbon materials might significantly impact their catalytic performance.

中文翻译：

痕量的Cu（OAc）2增强了用HCl洗涤的碳纳米管催化的枯烯氧化效率

在工业生产中，将烃氧化为高附加值的中间体非常重要。开发低成本，高活性的催化体系具有重要意义。在这项研究中，碳纳米管（CNTs）被用作催化剂，而枯烯被用作被氧化成高附加值的过氧化物，醇和酮的基质。通过添加痕量的Cu（OAc）₂（1 ppm的CNTs），枯烯的转化率从38.5％大大提高到54.2％，醇的选择性从25.1％增加到44.7％，表明痕量的Cu （OAc）₂可以显着调节反应性和产物选择性。机理研究表明，这种促进作用是由HCl洗涤引起的吸附在碳表面的氯的存在引起的。这种吸附的氯在反应过程中极不稳定，并与Cu（OAc）₂相互作用形成Cu-Cl组分，从而加速了过氧化物的分解并促进了反应的活性。这项研究表明碳材料的预处理可能会大大影响其催化性能。

更新日期：2020-03-11

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