A Mesoporous Aluminosilicate Nanoparticle-Supported Nickel-Boron Composite for the Catalytic Reduction of Nitroarenes

Autor: Monique Tso, Josh H. Golden, Bakthan Singaram, Karen C. Bustillo, Gabriella Amberchan, Ryan Manley, Jason K. Cooper, Scott R. J. Oliver, Jesse L. Hauser
Rok vydání: 2019
Předmět:
Zdroj: ACS Applied Nano Materials, vol 2, iss 3
Popis: An amorphous nickel and boron composite (NBC) was synthesized from nickel chloride hexahydrate (NiCl2·6H2O) and sodium borohydride (NaBH4) in absolute ethanol, both in bulk and supported on mesoporous aluminosilicate nanoparticles (MASN). Comparatively, NBC-MASN demonstrated better catalytic activity for the selective reduction of the nitro group on a variety of polysubstituted nitroarenes, using hydrazine hydrate (N2H4·H2O) as the reducing agent at 25 °C. Reuse and regeneration of NBC-MASN for the reduction of p-nitrotoluene to p-toluidine were studied with NaBH4 acting as a regeneration agent. Good catalytic activity was sustained through nine reuse cycles when equimolar NaBH4 was present in situ with N2H4·H2O (99%-67% isolated aniline yield). The structure and composition of NBC and NBC-MASN were examined by electron microscopy, energy dispersive X-ray spectroscopy (EDS), powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and inductively coupled plasma optical emission spectroscopy (ICP-OES). The results for NBC-MASN show that a thin (
Databáze: OpenAIRE
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