Abstract
Developing cost-effective and efficient hydrogenation catalysts is crucial for Liquid Organic Hydrogen Carrier (LOHC) technology. ZnO-modified Ni/Al2O3 catalysts were prepared and evaluated for their catalytic hydrogenation of N-propylcarbazole (NPCZ). Among all catalysts, NiZn11Al achieved saturation hydrogenation of NPCZ within 25 min and exhibited excellent potential for industrial applications. The moderate amount of ZnO enhanced the dispersion of Ni nanoparticles, while excessive ZnO inhibited dispersion and promoted Ni-Zn alloy formation. The amount of ZnO doping determined the interaction strength and direction of electron transfer between Ni and ZnO. The formation of the Ni-ZnO interface effectively prevented agglomeration of Ni nanoparticles and improved catalytic stability for NPCZ hydrogenation. Dispersed Niδ+ boosted hydrogen activation, and the strong acid sites of the catalyst promoted the hydrogenation activity. The synergistic effect of Ni and ZnO was shown to accelerate the hydrogenation rate and lower the activation energy compared with Ru-based catalysts.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.