Tailoring the selective adsorption sites of NiMoO by Ni particles for biomass upgrading assisted hydrogen production

5-Hydroxymethylfurfural electrooxidation reaction (HMFOR) is a promising route to produce valueadded chemicals from biomass. Since it involves HMF adsorption and C-H/O-H cleavage, understanding the adsorption behavior and catalytic process of organic molecules on catalysts is important. Herein, the selective adsorption sites of NiMoO are tuned by Ni particles for HMFOR-assisted H2 production. Experimental and theoretical calculation results indicate that the synergistic interaction between Ni and NiMoO optimizes the adsorption/desorption of HMF/intermediates/2,5-furandicarboxylic acid (FDCA) and promotes the C-H/O-H bond cleavage, thereby improving the HMFOR kinetics (kNiMoO-Ni/ kNiMoO = 1.97) and FDCA selectivity (99.3%). When coupled as a two-electrode system, it can drive efficient HMF conversion (FDCA yield: 98.5%) and H2 production (Faradaic efficiency: 99.1%) at 1.45 V. This work thus offers a strategy to tune the adsorption sites of catalyst for efficient HMFOR-assisted H2 production.(c) 2023 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.

Automated summary

This study investigates the adsorption behavior and catalytic process in the 5-hydroxymethylfurfural electrooxidation reaction (HMFOR). By tuning the selective adsorption sites of NiMoO with Ni particles, the synergy between Ni and NiMoO improves the reaction kinetics and product selectivity. The coupled two-electrode system demonstrates high efficiency in converting HMF to value-added chemicals and producing pure hydrogen.