2-dimensional nanoleaf-like porous copper nitrate hydroxide as an effective heterogeneous catalyst for selective oxidation of hydroxymethylfurfural to diformylfuran

• 2D nano-leaf-like porous copper nitrate hydroxide (LPCNH) is facilely fabricated. Combination of LPCNH/TEMPO efficiently converts HMF to DFF with high selectivities. The reaction time for 60 min at 100 °C could achieve > C = 96% and S DDF 100%. At 140 °C, a significantly Y 99.5% surpasses almost all reported values. LPCNH be reusable catalyzing TEMPO convert DFF. 2,2,6,6-tetramethylpiperidin-oxyl (TEMPO) accompanied Cu has been validated as promising oxidative catalytic process oxidizing 5-hydroxymethylfurfural (HMF) value-added products. Since Cu-O cluster plays an important role in TEMPO-based oxidation, N - O moiety would facilitate the cycle regeneration, interesting solid-phase material, (CNH) (Cu 2 (OH) 3 NO ) proposed first co-catalyzing oxidize into valuable product, 2,5-diformylfuran (DFF) . In particular, CNH elliptical surface fabricated become leaf-like maximize contact via relatively simple procedure, advantageous catalyst converting While or was unable DFF, combination rapidly, converted 99.3% 100% can obtained, surpass values, indicating that LPCNH+TEMPO selective also These findings validate certainly useful heterogeneous valorizing HMF.