Fabrication of Highly Dispersed Ru Catalysts on CeO2 for Efficient C3H6 Oxidation

被引：4
|
作者：
Zhang, Bifeng [1 ]
Yang, Jiawei [1 ]
Mu, Yibo [1 ]
Ji, Xiaoyu [1 ]
Cai, Yandi [1 ]
Jiang, Nan [1 ]
Xie, Shaohua [2 ]
Qian, Qiuhui [3 ]
Liu, Fudong [2 ]
Tan, Wei [1 ]
Dong, Lin [1 ]
机构：
[1] Nanjing Univ, State Key Lab Pollut Control & Resource Reuse, Key Lab Mesoscop Chem MOE, Sch Environm,Sch Chem & Chem Engn,Jiangsu Key Lab, Nanjing 210023, Peoples R China
[2] Univ Calif Riverside, Bourns Coll Engn, Ctr Environm Res Technol CE CERT, Dept Chem Environm Engn,Mat Sci & Engn MSE Program, Riverside, CA 92521 USA
[3] Suzhou Univ Sci & Technol, Sch Environm Sci & Engn, Natl & Local Joint Engn Lab Municipal Sewage Resou, Suzhou 215009, Peoples R China
来源：
ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2024年 / 58卷 / 43期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Ce-BTC; one-step hydrothermal method; dispersionof RuO x; C3H6; oxidation; Ru-O-Ce structure; RU/CEO2; CATALYSTS; LOW-TEMPERATURE; AMMONIA-SYNTHESIS; IN-SITU; COMBUSTION; CERIA; NANOPARTICLES; PERFORMANCES; PROPENE;
D O I：
10.1021/acs.est.4c07159
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Emissions of volatile organic compounds (VOCs) threaten both the environment and human health. To realize the elimination of VOCs, Ru/CeO2 catalysts have been intensively investigated and applied. Although it has been widely acknowledged that the catalytic performance of platinum group metal catalysts was highly determined by their dispersion and coordination environment, the most reactive structures on Ru/CeO2 catalysts for VOCs oxidation are still ambiguous. In this work, starting from Ce-BTC (BTC = 1,3,5-benzenetricarboxylic acid) materials, atomically dispersed Ru catalysts and agglomerated Ru catalysts were successfully created via one-step hydrothermal method (Ru-CeO2-BTC) and conventional incipient wetness impregnation method (Ru/CeO2-BTC), respectively. In a typical model reaction of C3H6 oxidation, atomically dispersed Ru delta+ species with the formation of abundant Ru-O-Ce linkages on Ru-CeO2-BTC were found to perform much better than agglomerated RuOx species on Ru/CeO2-BTC. Further characterizations and mechanism study disclosed that Ru-CeO2-BTC catalyst with atomically dispersed Ru ions and more superior low temperature redox performance compared to Ru/CeO2-BTC could better facilitate the adsorption/activation of C3H6 and the decomposition/desorption of intermediates, thus exhibiting superior C3H6 oxidation activity. This work elucidated the reactive sites on Ru/CeO2 catalysts in the C3H6 oxidation reaction and provided insightful guidance for designing efficient Ru/CeO2 catalysts to eliminate VOCs.
引用
收藏
页码：19533 / 19544
页数：12
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