2026-10-13T15:38:10Z https://www.scidb.cn/oai

10.57760/sciencedb.01010 2026-08-31T10:17:18Z

2026-08-31 Highly stable encapsulated Ni catalyst for phenol hydrogenation: Synthesis and mechanistic insight doi:10.57760/sciencedb.01010 en Hydrogenation of biomass-derived phenol to cyclohexanol represents a sustainable pathway forcyclohexanol production. Although supported Ni catalysts exhibit potential for fixed-bed applications, traditional systems suffer from rapid deactivation. Herein, we demonstrate a highly stableencapsulated Ni@silicalite-1 catalyst synthesized via chelator-free hydrothermal route. Comparedto conventional impregnated Ni/silicalite-1 counterparts, Ni@silicalite-1 maintains exceptionaloperational stability beyond 100 h with sustained phenol conversion exceeding 98% and cyclohexanol selectivity over 95% under continuous-flow conditions. Characterization results includingX-ray absorption spectroscopy, in-situ diffuse reflectance infrared Fourier transform spectroscopyand high angle annular dark field scanning transmission electron microscopy reveal that ultrafineNi nanoparticles (~2.34 nm) anchored via Ni-O-Si interfacial bonds constitute the active sites, conferring dual resistance to thermal sintering and carbon deposition under reaction conditions.Mechanistic studies tracking silicalite-1 crystallization demonstrate that amorphous nickel silicateprecursors gradually transform into spatially confined Ni nanoparticles driven by the organic template. This work establishes a universal paradigm for constructing sintering-resistant metal-zeolitecatalysts through nanoscale engineering of metal-support interfaces. Hydrogenation; Phenol; Cyclohexanol; Nickel-based catalyst; In-situ synthesis Maochen Qian Wen Liu Xinbao Zhang Xiangxue Zhu Xiujie Li PUBLIC https://creativecommons.org/licenses/by-nc-nd/4.0/ dataset Science Data Bank