In-situ fabrication of Ag nanoparticles on biomass derived biochar as highly active catalyst for the halogenation of terminal alkynes at room temperature

摘要: Abstract Herein, we reported a facile and novel Ag nanoparticle (NP) catalyst fabricated on renewable biomass derived biochar through in-situ reduction-pyrolysis process. In the absence of reductants or stabilizing agents, oxygen-containing groups in original lignocellulosic offer requisite sites (-OH, -COOH, C-O-C) for reduction Ag+ anchor metal center, which is conducive to synthesize uniformly dispersed nanoparticle. The Ag@C was further applied conversion 1-alkynes N-halosuccinimide (-Cl, -Br -I) 1-haloalkynes diverse structures with good excellent yields up 98% at room temperature. showed broad substrate applicability recyclability. Extensive studies indicated that homogeneously Ag(0) particles were key high efficiency. Experimental theoretical calculations also revealed addition base could significantly activated inert C-Cl bond N-chlorosuccinimide, promoting its current finding offers economic method fabrication nano catalysts carbon, demonstrating feasibility utilizing rigid structure functionalities prepare carbonaceous material catalysis applications.