燃料化学学报（中英文）2025，Vol.53Issue(12)：1779-1788,10.DOI:10.1016/S1872-5813(25)60574-3
La改性Cu-Al尖晶石催化甲醇水蒸气重整制氢
La-modified Cu-Al spinel catalysts for hydrogen production via methanol steam reforming
摘要
Abstract
A series of surface-modified Cu1-xLaxAl2.5 spinel catalysts with La were prepared by using the impregnation method and used in the methanol steam reforming(MSR)for hydrogen production.The interaction between La and the spinel catalyst,along with its effect on the sustained release of copper species,was investigated with the help of XRD,N2 sorption,H2-TPR,and XPS characterization techniques.The results indicate that La modification not only alters the microenvironment of Cu species and enhances the oxygen adsorption,but also promotes the formation of Al-O-La bonds,resulting in a stable interfacial structure.The Cu1-xLaxAl2.5 spinel catalysts can be applied to the MSR reaction without pre-reduction treatment.Under 260 ℃,a water-to-alcohol molar ratio of 2,and a methanol mass space velocity of 2.0 h-1,the optimal catalyst Cu0.9La0.1Al25 maintains a stable methanol conversion of approximately 94％during a continuous reaction lasting for 136 h.In comparison with the unmodified catalyst,the catalytic activity of Cu0.9La0.1Al2.5 is 5％higher,in addition to a decreased selectivity to CO by 20％.Further studies reveal that the Cu0.9La0.1Al2.5 catalyst has the lowest Cu sustained release rate and the minimal Cu grain size after prolonged reaction,indicating that La modification plays a crucial role in determining the sustained release rate and the fate of the Cu species.关键词
La改性/尖晶石/甲醇水蒸气重整/氢气/缓释催化Key words
La modification/spinel/methanol steam reforming/hydrogen/sustained-release catalysis分类
化学化工引用本文复制引用
陈泳竹,刘道胜,赵永福,张财顺,王宏浩,刘雅杰,韩蛟,张磊,高志贤..La改性Cu-Al尖晶石催化甲醇水蒸气重整制氢[J].燃料化学学报（中英文）,2025,53(12):1779-1788,10.基金项目
The project was supported by National Natural Science Foundation of China(22379059),Basic scientific research project of Liaoning Provincial Department of Education(LJ212410148019),Talent Scientific Research Fund of Liaoning Petrochemical University(2019-XJJL-028).国家自然科学基金(22379059),辽宁省教育厅基本科研项目(LJ212410148019)和辽宁石油化工大学引进人才科研启动基金(2019-XJJL-028)资助 （22379059）
