Journal
JOURNAL OF MATERIALS RESEARCH
Volume 37, Issue 7, Pages 1390-1402Publisher
SPRINGER HEIDELBERG
DOI: 10.1557/s43578-022-00542-0
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Funding
- National Key Research and Development Program of China [2021YFB3500600, 2021YFB3500605]
- Key R&D Program of Jiangsu Province [BE2018074]
- Jiangsu International Cooperation Project [BZ2021018]
- Nanjing Science and Technology Top Experts Gathering Plan, Science and Technology Plan of Suzhou [SGC2020092]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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This study investigated the promotion mechanism of SnO2 modification on catalyst performance. The results showed that the Sn-Mn-Ce-Co-O-x catalyst exhibited the best activity when the SnO2 content was 8%. The SnO2 modification mainly contributed to the generation of Mn4+, increased chemisorbed oxygen on the catalyst surface, and improved the redox performance. Additionally, various intermediate products were generated in the catalytic reaction, covering the catalytic sites.
Mn-based catalysts are often used for catalytic reduction of NO and catalytic degradation of chlorobenzene. In this work, the promotion mechanism of SnO2 modification was investigated. The activities of Sn-Mn-Ce-Co-O-x catalyst were the best when the SnO2 content was 8%. In the temperature range from 120 to 330 degrees C, the NO conversion was above 90%, and the T-50 and T-90 of CB decreased to 127 degrees C and 183 degrees C. The structure of the catalyst was characterized, and it was found that the catalytic effects of SnO2 on pollutant degradation performance of Sn-Mn-Ce-Co-O-x catalyst were mainly as follows: (1) leading to the formation of a large number of Mn4+; (2) increasing the amount of chemisorbed oxygen on the catalyst surface; and (3) improving the redox performance of the catalyst. CHCl3, CCl4, C2HCl3, and C2Cl4 intermediate products were generated in the catalytic reaction, covering the catalytic site.
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