Ding Yufang, Sun Junli, Hu Rongqi, He Daiping, Qiu Xulin, Luo Chengying, Jiang Ping
Chongqing Key Lab of Green Catalysis Materials and Technology, College of Chemistry, Chongqing Normal University Chongqing 401331 China
RSC Adv. 2024 Aug 29;14(38):27481-27487. doi: 10.1039/d4ra04960h.
CuNi-ZrO nanocomposites were prepared by a simple coprecipitation technique of copper, nickel and zirconium ions with potassium carbonate. The structures of the nanocomposites were characterized by N physical adsorption, XRD, H-TPR and STEM-EDS. The CuNi-ZrO nanocomposite showed outstanding catalytic performance in hydrogenation of levulinic acid (LA) to γ-valerolactone (GVL), especially NaOH solution (0.5 mol L) as a solvent. 100% LA conversion and > 99.9% GVL selectivity are achieved over CuNi-ZrO catalyst at 200 °C, 3 MPa for 1.5 h. Characterization results suggest that the excellent reactivity of the CuNi-ZrO may be due to a better reducibility of nickel oxide in the CuONiO-ZrO, dispersion of Ni in the CuNi-ZrO compared to nickel oxide in the NiO-ZrO and Ni in the Ni-ZrO and promotion of OH. The results demonstrate that the CuNi-ZrO nanocomposite has potential to realize high efficiency and low-cost synthesis of liquid fuels from biomass.
通过铜、镍和锆离子与碳酸钾的简单共沉淀技术制备了CuNi-ZrO纳米复合材料。采用N物理吸附、XRD、H-TPR和STEM-EDS对纳米复合材料的结构进行了表征。CuNi-ZrO纳米复合材料在将乙酰丙酸（LA）加氢制γ-戊内酯（GVL）反应中表现出优异的催化性能，尤其是以NaOH溶液（0.5 mol/L）为溶剂时。在200℃、3 MPa下反应1.5 h，CuNi-ZrO催化剂上LA的转化率达到100%，GVL的选择性大于99.9%。表征结果表明，CuNi-ZrO优异的反应活性可能归因于CuONiO-ZrO中氧化镍更好的还原性能、与NiO-ZrO和Ni-ZrO中的氧化镍相比，Ni在CuNi-ZrO中的分散性以及OH的促进作用。结果表明，CuNi-ZrO纳米复合材料具有实现从生物质高效低成本合成液体燃料的潜力。
