Platinum and palladium nanoparticles supported on three types of carbon nanofibers (CNFs) are synthesized and used as catalysts in the hydrogenation of nitroarenes. Nanosized platinum particles dispersed on platelet-type CNF efficiently catalyze the reduction of functionalized nitroarenes to the corresponding substituted anilines in high turnover numbers with other functional groups remaining intact.
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http://dx.doi.org/10.1021/ol800277a | DOI Listing |
Materials (Basel)
December 2024
Key Laboratory of Green Chemical Process of Ministry of Education, School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China.
Polydispersed Ag species-modified TiO samples with abundant oxygen vacancies were successfully prepared through the calcination of atomically precise Ag nanocluster-loaded TiO at an optimal temperature under a nitrogen atmosphere. The ligands of the Ag nanoclusters are removed by extracting lattice oxygen from TiO during the calcination, leading to the formation of CO, SO, and HO vapor. This process simultaneously induces Ag species sintering on the surface of TiO.
View Article and Find Full Text PDFJ Org Chem
December 2024
Department of Chemistry, Malaviya National Institute of Technology Jaipur, JLN Marg, Jaipur 302017, Rajasthan, India.
Herein, we have established the formation of diaryl amide by aminocarbonylation of nitrobenzene with boronic acids. The method works in the catalytic presence of economical and commercially available CuI salt, which was significantly promoted by the FeSe(CO) cluster. Mo(CO) serves as a source of CO, and it also acts as a reductant with a combination of iron cluster.
View Article and Find Full Text PDFSmall
December 2024
State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian, 116024, China.
High entropy alloys (HEAs) are promising heterocatalysts because of their unique physicochemical properties, but research on HEA-catalyzed tandem reactions is lacking. Moreover, limited research on HEAs for molecular transformation has hindered their development. Herein, an unsupported nanoporous HEA Al-Pt-Pd-Ru (HEANPore) prepared using a top-down dealloying method is reported.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
November 2024
School of Nuclear Science and Technology, Key Laboratory of Precision and Intelligent Chemistry, National Synchrotron Radiation Laboratory, School of Chemistry and Materials Science, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, China.
The development of highly efficient and cost-effective nonprecious metal catalysts for the selective hydrogenation of halogenated nitroarenes is very appealing yet challenging. Here, we demonstrate that the hydrogenation activity and selectivity of Co single-atom catalyst (SAC) can be tuned by tailoring the structure of second coordination sphere via P doping. As revealed by synchrotron radiation-based X-ray absorption spectroscopy characterizations, such a P doping on N-coordinated Co SAC results in the unsymmetric Co-NP coordination structure.
View Article and Find Full Text PDFSci Rep
November 2024
Department of Organic Chemistry, Faculty of Chemistry, Urmia University, Urmia, Iran.
This study developed a novel and highly active heterogeneous catalyst of nickel nanoparticles supported on β-cyclodextrin-grafted magnetic FeO nanoparticles (Ni@β-CD@FeO). β-CD, a biodegradable, biocompatible, green, and non-toxic cyclic oligosaccharide, was modified with FeO nanoparticles to create β-CD@FeO. The nickel was then immobilized onto this support.
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