Electronic metal-support interaction enhanced ammonia decomposition efficiency of perovskite oxide supported ruthenium

被引：50
作者：
Cao, Chen-Feng [1 ,2 ]
Wu, Kai [2 ]
Zhou, Chen [2 ]
Yao, Yin-Hua [2 ]
Luo, Yu [2 ]
Chen, Chong-Qi [2 ]
Lin, Li [2 ]
Jiang, Lilong [2 ]
机构：
[1] Fuzhou Univ, Coll Chem, Fuzhou 350116, Peoples R China
[2] Fuzhou Univ, Natl Engn Res Ctr Chem Fertilizer Catalyst, Sch Chem Engn, Fuzhou 350002, Peoples R China
来源：
CHEMICAL ENGINEERING SCIENCE | 2022年 / 257卷
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
Ammonia decomposition; Hydrogen production; Aliovalent cation substitution; ABO3 perovskite oxides; COX-FREE HYDROGEN; LATTICE OXYGEN; RU CATALYST; SIO2; NI; GENERATION; OXIDATION; ZRO2; RECONSTRUCTION; RU/AL2O3;
D O I：
10.1016/j.ces.2022.117719
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Ammonia has been considered as a promising hydrogen carrier with high energy storage density and easy transport. Here, we report the ruthenium (Ru) nanoparticles supported on LaAlO3, a typical ABO3 perovskite oxide, as an efficient catalyst for ammonia decomposition. By tailoring the cation substitution of La3+ by Sr2+, the electronic properties of support materials were modulated, which exerts an impact on the electronic state of Ru active sites. It is found that the Ru/La0.8Sr0.2AlO3 catalyst has a high hydrogen formation rate and low activation energy. In situ spectroscopic investigation and NH3 temperature programmed desorption (NH3-TPD) analyses indicate the electron-rich state of metallic Ru on the La0.8Sr0.2AlO3 support, which promotes associative desorption of N atoms and accelerates NH3 decomposition reactions. This study provides a universal strategy of aliovalent cation substitution to engineer the electronic properties of metal/oxide catalysts as well as their catalytic activities. (c) 2022 Elsevier Ltd. All rights reserved.
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页数：8
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