Ru@Carbon Nanotube Composite Microsponge: Fabrication in Supercritical CO<sub>2</sub> for Hydrogenation of <i>p</i>-Chloronitrobenzene
Xianghong Ge,
Hui Liu,
Xingxing Ding,
Yanyan Liu,
Xingsheng Li,
Xianli Wu,
Baojun Li
Affiliations
Xianghong Ge
Zhengzhou Key Laboratory of Low-Dimensional Quantum Materials and Devices, Department of Physics, College of Science, Zhongyuan University of Technology, 41 Zhongyuan Road, Zhengzhou 450007, China
Hui Liu
Research Center of Green Catalysis, College of Chemistry, Zhengzhou University, 100 Science Road, Zhengzhou 450001, China
Xingxing Ding
Zhengzhou Key Laboratory of Low-Dimensional Quantum Materials and Devices, Department of Physics, College of Science, Zhongyuan University of Technology, 41 Zhongyuan Road, Zhengzhou 450007, China
Yanyan Liu
Research Center of Green Catalysis, College of Chemistry, Zhengzhou University, 100 Science Road, Zhengzhou 450001, China
Xingsheng Li
Research Center of Green Catalysis, College of Chemistry, Zhengzhou University, 100 Science Road, Zhengzhou 450001, China
Xianli Wu
Research Center of Green Catalysis, College of Chemistry, Zhengzhou University, 100 Science Road, Zhengzhou 450001, China
Baojun Li
Zhengzhou Key Laboratory of Low-Dimensional Quantum Materials and Devices, Department of Physics, College of Science, Zhongyuan University of Technology, 41 Zhongyuan Road, Zhengzhou 450007, China
Novel heterogeneous catalysts are needed to selectively anchor metal nanoparticles (NPs) into the internal space of carbon nanotubes (CNTs). Here, supercritical CO2 (SC-CO2) was used to fabricate the Ru@CNT composite microsponge via impregnation. Under SC-CO2 conditions, the highly dispersive Ru NPs, with a uniform diameter of 3 nm, were anchored exclusively into the internal space of CNTs. The CNTs are assembled into a microsponge composite. The supercritical temperature for catalyst preparation, catalytic hydrogenation temperature, and time all have a significant impact on the catalytic activity of Ru@CNTs. The best catalytic activity was obtained at 100 °C and 8.0 MPa: this gave excellent selectivity in the hydrogenation of p-chloronitrobenzene at 100 °C. This assembly strategy assisted by SC-CO2 will be promising for the fabrication of advanced carbon composite powder materials.
