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

在本文中，我们报道了一种通过新型的原位还原热解工艺在可再生生物质衍生的生物炭上制备的新型Ag纳米粒子（NP）催化剂。在没有还原剂或稳定剂的情况下，原始木质纤维素生物质中的含氧基团可提供原位还原Ag ⁺的必要位点（-OH，-COOH，COC）固定金属中心，有利于合成均匀分散的Ag纳米粒子。将Ag @ C催化剂进一步用于将1-炔烃和N-卤代琥珀酰亚胺（-Cl，-Br和-I）转化为多种结构的1-卤代炔烃，其在室温下的产率高达98％，优良至优异。该催化剂显示出广泛的底物适用性和良好的可回收性。大量研究表明，均匀分散的Ag（0）颗粒是高效的关键。实验和理论计算还表明，添加碱可以显着活化N-氯代琥珀酰亚胺中的惰性C-Cl键，从而促进其在室温下的转化。目前的发现为在生物质衍生的碳上制备纳米金属催化剂提供了一种简便而经济的方法，