Highly Stable Carbon‐Shell Encapsulated Ni−Cu Bimetallic Catalysts for Efficient Conversion of Levulinic Acid to γ‐Valerolactone

作者：Anping Yin, Yuhang Cai, Yibo Yang, Gaolei Qin, Ziyu Zhou, Xiaodong Sun, Hongliu Wan, Zhi Cao · 发表于：ChemCatChem · 年份：2024 · DOI：10.1002/cctc.202301157 · 被引用次数：5 · 研究领域：Catalysis for Biomass Conversion、Nanomaterials for catalytic reactions、Supercapacitor Materials and Fabrication

Abstract Non‐noble Ni−Cu alloys serve as an alternative catalytic material for noble metal‐based catalysts that could be applied in the efficient conversion of levulinic acid (LA) into the high value γ‐valerolactone (GVL). However, maintaining the catalytic stability for Ni−Cu nanoparticles in the LA hydrogenation process remains a substantial challenge, Herein, this problem is solved by constructing carbon‐protected catalytic sites within carbon layer‐coated Ni−Cu nanoalloy composite via pyrolysis of NiCu x (OH)/glucose precursor. The optimized NiCu 0.68 @C catalyst exhibits excellent stability and selectivity to GVL (>99 %) in the hydrogenation of LA reaction. Various characterization indicates that the enhancement in stability originates from the protective effect of the carbon layer, which prevents the metal leaching, oxidation and aggregation of Ni−Cu nanoparticles during the reaction process. This work greatly advances non‐noble metal‐catalyzed conversion of LA to GVL and helps the rational design of bimetallic catalysts.