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Regeneration of copper catalysts mediated by molybdenum-based oxides
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作者 Changyu Ding Xiaoli Pan +7 位作者 Isla E.Gow Xia Wu hongchen cao Zhounan Yu Xiaoyan Liu Xiaofeng Yang Qinggang Liu Yanqiang Huang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第8期618-625,I0013,共9页
Cu catalysts,known for their unparalleled catalytic capabilities due to their unique electronic structure,have faced inherent challenges in maintaining long-term effectiveness under harsh hydrogenation conditions.Here... Cu catalysts,known for their unparalleled catalytic capabilities due to their unique electronic structure,have faced inherent challenges in maintaining long-term effectiveness under harsh hydrogenation conditions.Here,we demonstrate a molybdenum-mediated redispersion behavior of Cu under hightemperature oxidation conditions.The oxidized Cu nanoparticles with rich metal-support interfaces tend to dissolve into the MoO_(3)support upon heating to 600℃,which facilitates the subsequent regeneration in a reducing atmosphere.A similar redispersion phenomenon is observed for Cu nanoparticles supported on Zn O-modified MoO_(3).The modification of ZnO significantly improves the performance of the Cu catalyst for CO_(2)hydrogenation to methanol,with the high activity being well maintained after four repeated oxidation-reduction cycles.In situ spectroscopic and theoretical analyses suggest that the interaction involved in the formation of the copper molybdate-like compound is the driving force for the redispersion of Cu.This method is applicable to various Mo-based oxide supports,offering a practical strategy for the regeneration of sintered Cu particles in hydrogenation applications. 展开更多
关键词 Cu-based catalysts AGGREGATION REGENERATION OXIDATION CO_(2)hydrogenation
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