Mitta Harisekhar, Seelam Prem Kumar, Chary K V Raghava, Mutyala Suresh, Boddula Rajender, Asiri Abdullah M
State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China.
Catalysis Division CSIR-Indian Institute of Chemical Technology Hyderabad 500007 Telangana India.
Glob Chall. 2018 Jul 11;2(12):1800028. doi: 10.1002/gch2.201800028. eCollection 2018 Dec.
In this work, Cu nanoparticles (Cu NPs, 2-20 nm) supported on Hydrotalcite catalysts exhibit enhanced selectivity for γ-valerolactone (GVL) during hydrogenolysis of levulinic acid (LA). At 260 °C, over 3 wt% Cu achieved 87.5% of LA conversion with a maximum GVL selectivity (95%). In contrast, LA hydrogenolysis over 3Cu/Hydrotalcite catalyst is highly active and stable toward the production of GVL due to balanced acido-basicity and higher Cu dispersion with ultrasmall particle sizes, which are investigated through the temperature programmed desorption (TPD) of ammonia, NO titration, and transmission electron microscopy (TEM) analysis. Hydrotalcite in combination with inexpensive Cu catalyst is found to be an efficient and environmentally benign for LA hydrogenolysis.
在这项工作中，负载在水滑石催化剂上的铜纳米颗粒（Cu NPs，2 - 20纳米）在乙酰丙酸（LA）的氢解过程中对γ-戊内酯（GVL）表现出增强的选择性。在260°C下，超过3 wt%的铜实现了87.5%的LA转化率，GVL选择性最高可达95%。相比之下，3Cu/水滑石催化剂上的LA氢解对GVL的生产具有高活性和稳定性，这归因于酸碱平衡以及通过氨程序升温脱附（TPD）、NO滴定和透射电子显微镜（TEM）分析所研究的具有超小粒径的更高铜分散度。发现水滑石与廉价的铜催化剂相结合对于LA氢解是一种高效且环境友好的体系。
