Engineering crystal plane of NiCo2O4 to regulate oxygen vacancies and acid sites for alkali-free oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid

• DOI: 10.1016/j.gee.2024.05.002
• Publication Date: 2024-05-14T15:56:37Z
• Authors: Hengli Qian; keyuan Zhang; Yongchuo He; Qidong Hou; Chao Xie; Ruite Lai; Guanjie Yu; Tianliang Xia; Xinyu Bai; Haijiao Xie; Meiting Ju

The catalytic oxidation of HMF involves a cascading reaction with multiple intermediate products, making it crucial to enhance the oriented adsorption capacity specific functional groups for accelerating entire process. To achieve efficient selective FDCA, series NiCo2O4 catalysts different morphologies, such as flaky, echinoids, pompon and corolla, were prepared characterized by XRD, SEM, TEM, BET, XPS, FTIR. Among four catalysts, flaky exhibited most excellent activity stability, FDCA yield 60.1% within 12 h at 80 °C without alkali participation. performance catalyst is attributed oxygen vacancies acid sites generated exposed (400) facets. on surface can precisely adsorb -CHO -CH2-OH HMF, respectively, this synergistic effect promotes production FDCA. This work great significance fundamentally study micro-topography or crystal-plane properties surfaces.