Fabrication of Highly Dispersed Ru Catalysts on CeO<sub>2</sub> for Efficient C<sub>3</sub>H<sub>6</sub> Oxidation
Emissions of volatile organic compounds (VOCs) threaten both the environment and human health. To realize the elimination of VOCs, Ru/CeO<sub>2</sub> 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/CeO<sub>2</sub> 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-CeO<sub>2</sub>-BTC) and conventional incipient wetness impregnation method (Ru/CeO<sub>2</sub>-BTC), respectively. In a typical model reaction of C<sub>3</sub>H<sub>6</sub> oxidation, atomically dispersed Ru<sup>δ+</sup> species with the formation of abundant Ru-O-Ce linkages on Ru-CeO<sub>2</sub>-BTC were found to perform much better than agglomerated RuO<sub><i>x</i></sub> species on Ru/CeO<sub>2</sub>-BTC. Further characterizations and mechanism study disclosed that Ru-CeO<sub>2</sub>-BTC catalyst with atomically dispersed Ru ions and more superior low temperature redox performance compared to Ru/CeO<sub>2</sub>-BTC could better facilitate the adsorption/activation of C<sub>3</sub>H<sub>6</sub> and the decomposition/desorption of intermediates, thus exhibiting superior C<sub>3</sub>H<sub>6</sub> oxidation activity. This work elucidated the reactive sites on Ru/CeO<sub>2</sub> catalysts in the C<sub>3</sub>H<sub>6</sub> oxidation reaction and provided insightful guidance for designing efficient Ru/CeO<sub>2</sub> catalysts to eliminate VOCs.
Authors
- Qiuhui Qian (ORCID: https://orcid.org/0000-0003-4143-8802)
- Xiaoyu Ji (ORCID: https://orcid.org/0000-0002-1101-0007)
- Wei Tan (ORCID: https://orcid.org/0000-0002-1481-9346)
- Bifeng Zhang
- Fudong Liu (ORCID: https://orcid.org/0000-0001-8771-5938)
- Yibo Mu
- Shaohua Xie (ORCID: https://orcid.org/0000-0003-1550-7421)
- Lin Dong (ORCID: https://orcid.org/0000-0002-8393-6669)
- Nan Jiang (ORCID: https://orcid.org/0000-0002-8423-7675)
- Yandi Cai
- Jiawei Yang
Institutions
- University of California, Riverside (US)
- Center for Environmental Health (US)
- University of California System (US)
- Suzhou University of Science and Technology (CN)
- State Key Laboratory of Pollution Control and Resource Reuse (CN)
- Nanjing University (CN)
Publication Details
- Journal
- Environmental Science & Technology
- Published
- 2024-09-26
- DOI
- https://doi.org/10.1021/acs.est.4c07159
- Citations
- 33
- Primary Topic
- Catalytic Processes in Materials Science
- Type
- article
- Field-Weighted Citation Impact
- 3.87
Funders
- National Science Foundation
- China Association for Science and Technology
- National Natural Science Foundation of China
- China Postdoctoral Science Foundation
- Natural Science Foundation of Jiangsu Province
- Jiangsu Provincial Department of Human Resources and Social Security
- University of California, Riverside