Tailoring the Size of Ru Nanoparticles via Template Evaporation for One-Step Conversion of Cellulose to Sorbitol

文献类型： 外文期刊

第一作者： Yang, Jingnan

作者： Yang, Jingnan;Liu, Longxin;Zhang, Huiling;Guan, Qingxin;Li, Wei;Qiu, Mo

作者机构：

关键词： cellulose upgrading; melamine; template; N-doping; size effect

期刊名称：ACS SUSTAINABLE CHEMISTRY & ENGINEERING （ 影响因子：8.4； 五年影响因子：8.7 ）

ISSN： 2168-0485

年卷期： 2023 年 11 卷 43 期

页码：

收录情况： SCI

摘要： Directly converting cellulose to sorbitol is of great significance for the production of food-grade sorbitol. However, the hydrolysis of cellulose requires harsh reaction conditions, limiting further upgrading of its hydrolysate. Herein, N-modified Ru nanoparticles (NPs) supported on active carbon were fabricated by a facile approach using melamine as both template and nitrogen precursor. Ru NPs with appropriate sizes and high metallic Ru(0 )content were synthesized via the ball-milling process of melamine and active carbon, followed by impregnation of RuCl3 and subsequent copyrolysis. Meanwhile, the impacts of different fabrication procedures were studied in detail, demonstrating the necessity of mixing melamine and metal precursors together. The catalyst Ru-N/C-1.3 converted cellulose into sorbitol successfully, with a satisfactory yield of 82%. Ru NPs with reasonable diameters depicted limited hydrogenation activity, protecting sorbitol from further hydrogenation at the high temperature of cellulose hydrolysis. Density functional theory revealed that pyridinic N species balanced the adsorption of glucose and sorbitol molecules, favoring the hydrogenation of glucose. It also demonstrated that enlarged Ru NPs have lower hydrogenation activity and prevent sorbitol from side reactions. Our work provides an effective strategy to fabricate metal nanoparticle catalysts with controllable sizes and activities for biomass macromolecule refining.

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