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Huang S, Shan Y, Shi X, Liu Z, Wang Q, He H. A Study of CeSnO x and Pd/CeSnO x as Low-Temperature NO x Adsorbers with Excellent Hydrothermal Stability. ACS OMEGA 2023; 8:30859-30867. [PMID: 37663454 PMCID: PMC10468927 DOI: 10.1021/acsomega.3c00841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 08/03/2023] [Indexed: 09/05/2023]
Abstract
In the present work, we report on two passive NOx adsorber (PNA) material candidates: the novel support CeSnOx with and without Pd loading. The NOx adsorption and storage capacities of fresh and hydrothermally aged CeSnOx and Pd/CeSnOx were investigated. The results show that CeSnOx exhibits a rather large NOx uptake and storage capacity (28.9 μmol/g), while the loading of Pd on CeSnOx can further increase the storage capacity to 37.6 μmol/g and affect the desorption temperature of NOx. It was found that the NOx desorption temperature of Pd/CeSnOx was compatible with the efficient operating window of selective catalytic reduction (SCR) catalysts. After a hydrothermal aging treatment at 800 °C for 12 h, the NOx adsorption and storage capacities of CeSnOx and Pd/CeSnOx increased, indicating excellent hydrothermal stability. The interaction of Pd with CeSnOx, the state of Pd species, and the structure of CeSnOx and Pd/CeSnOx are studied by combination of the characterization results.
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Affiliation(s)
- Shasha Huang
- State
Key Joint Laboratory of Environment Simulation and Pollution Control,
Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Beijing
Key Lab for Source Control Technology of Water Pollution, College
of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
- Engineering
Research Center for Water Pollution Source Control & Eco-remediation,
College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Yulong Shan
- State
Key Joint Laboratory of Environment Simulation and Pollution Control,
Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoyan Shi
- State
Key Joint Laboratory of Environment Simulation and Pollution Control,
Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhongqi Liu
- State
Key Joint Laboratory of Environment Simulation and Pollution Control,
Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiang Wang
- Beijing
Key Lab for Source Control Technology of Water Pollution, College
of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
- Engineering
Research Center for Water Pollution Source Control & Eco-remediation,
College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Hong He
- State
Key Joint Laboratory of Environment Simulation and Pollution Control,
Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University
of Chinese Academy of Sciences, Beijing 100049, China
- Center
for Excellence in Regional Atmospheric Environment. Institute of Urban
Environment. Chinese Academy of Sciences, Xiamen 361021, China
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Hou L, Wen Y, Wu J, Yue Y, Zhang J, Zhang J, Qian G. Reveal of free radicals in manganese-based catalysts and their roles during selective catalytic reduction of nitrogen oxide. J Colloid Interface Sci 2022; 628:193-204. [DOI: 10.1016/j.jcis.2022.07.093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 06/07/2022] [Accepted: 07/15/2022] [Indexed: 12/01/2022]
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