Efficient Hydrogenolysis of C–O Bond over Pd/P-TiO<sub>2</sub>: The Generation and Role of Brønsted Acid Site Triggered by Spillover Hydrogen
Tingting Xiao, Jingrong Li, Jian Li, Qihang Gong, Peikai Luo, Xinluona Su, Haiyang Cheng, Chao Zhang, Fengyu Zhao
Abstract
The hydrogenolysis of cellulose-derived 5-hydroxymethylfurfural is essential for the production of fuels and chemicals from biomass. Herein, we fabricated a phosphorus-doped Pd/P-TiO 2 catalyst for the hydrodeoxygenation of 5-hydroxymethylfurfural to 2,5-dimethylfuran. A large number of defects and electron-deficient Ti 4+ sites ( d Ti 4+ ) were formed by doping phosphorus into the TiO 2 support, which could promote hydrogen spillover and reactant adsorption. Moreover, the spilled active hydrogen induced the formation of P–O(H)- d Ti 4+, which acted as a “Brønsted acidic site” to promote the activation of C–O bonds. Consequently, the Pd/P-TiO 2 catalyst exhibited superb activity for the hydrodeoxygenation of 5-hydroxymethylfurfural to 2,5-dimethylfuran at mild conditions of 150 °C under 1 MPa H 2 .