太原理工大学学报2025，Vol.56Issue(4)：621-630,10.DOI:10.16355/j.tyut.1007-9432.20230726
载体形貌对于Ru/CeO2催化剂合成氨性能影响的研究
Influence of Support Morphologies on Ammonia Synthesis Performances of Ru/CeO2 catalyst
摘要
Abstract
[Purposes]Ruthenium nanoparticles(Ru NPs)are easily aggregated in the process of reaction,which leads to the significant reduction in catalytic performance in the reaction of ammonia synthesis.It is an effective method to disperse Ru NPs in appropriate supports.[Methods]In this study,an OH-regulation strategy was used to fabricate three catalysts of CeO2(nanoparticles(CeO2-NP),nanorods(CeO2-NR),and nanocubes(CeO2-NC)with different morphologies by changing the concentration of OH-.Then,Ru NPs were loaded onto CeO2 by using impregnation reduction to ob-tain Ru/CeO2 catalysts.The physical and chemical properties of Ru/CeO2 were characterized by XRD,XPS,SEM,TEM,H2-TPR,etc.And the ammonia synthesis activities of Ru/CeO2 catalysts were investigated under mild conditions.[Results]As a result,when the loading amount of Ru NPs was 2.5%,the resulted 2.5%Ru/CeO2-NR catalyst displays high ammonia synthesis rate at 1 MPa and 450℃,mainly attributing to the suitable size of Ru NPs,more oxygen vacancies,Ru-O-Ce bonds,and Run+species.In addition,2.5%Ru/CeO2-NR doesn't exhibit hydrogen poisoning and has a thermal stability of 120 h,which shows a potential practical application prospect.关键词
OH-调控策略/不同形貌的二氧化铈/钌纳米粒子/负载型催化剂/合成氨Key words
OH-regulatory strategy/CeO2 with different mophologies/Ru nanoparticles/sup-ported catalyst/ammonia synthesis分类
化学化工引用本文复制引用
王鹏,张江涛,徐永平,李淑英,王爽..载体形貌对于Ru/CeO2催化剂合成氨性能影响的研究[J].太原理工大学学报,2025,56(4):621-630,10.基金项目
山西省基础研究计划青年科学研究项目(202203021212235) （202203021212235）
