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An B, Zhang QH, Zheng BS, Li M, Xi YY, Jin X, Xue S, Li ZT, Wu MB, Wu WT. Sulfone-Decorated Conjugated Organic Polymers Activate Oxygen for Photocatalytic Methane Conversion. Angew Chem Int Ed Engl 2022; 61:e202204661. [PMID: 35445780 DOI: 10.1002/anie.202204661] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Indexed: 02/03/2023]
Abstract
Oxidizing CH4 into liquid products with O2 under mild conditions still mainly relies on metal catalysis. We prepared a series of sulfone-modified conjugated organic polymers and found that the catalyst with proper SVI content (0.10) could drive O2 →H2 O2 →⋅OH to oxidize CH4 into CH3 OH and HCOOH directly and efficiently at room temperature under light irradiation. Experimental results showed that after 4 h reaction, decomposition rate and residual amounts of H2 O2 were 81.21 % and 4.83 mmol gcat -1 respectively, and CH4 conversion rate was 22.81 %. Mechanism studies revealed that illumination could induce the homolytic dissociation of S=O bonds on catalyst to produce oxygen and sulfur radicals, where the ⋅O could adsorb and activate CH4 , and the ⋅S could supply electrons for 1 O2 to generate H2 O2 and then for decomposing the H2 O2 into ⋅OH timely to oxidize CH4 . This research provided a novel organic catalysis approach for oxygen activation and utilization.
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Affiliation(s)
- Bo An
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering & Institute of New Energy, China University of Petroleum (East China), Qingdao, 266580, P. R. China
| | - Qin-Hua Zhang
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering & Institute of New Energy, China University of Petroleum (East China), Qingdao, 266580, P. R. China
| | - Bo-Shi Zheng
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering & Institute of New Energy, China University of Petroleum (East China), Qingdao, 266580, P. R. China
| | - Miao Li
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering & Institute of New Energy, China University of Petroleum (East China), Qingdao, 266580, P. R. China
| | - Yan-Yan Xi
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering & Institute of New Energy, China University of Petroleum (East China), Qingdao, 266580, P. R. China
| | - Xin Jin
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering & Institute of New Energy, China University of Petroleum (East China), Qingdao, 266580, P. R. China
| | - Sheng Xue
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, 266021, P. R. China
| | - Zhong-Tao Li
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering & Institute of New Energy, China University of Petroleum (East China), Qingdao, 266580, P. R. China
| | - Ming-Bo Wu
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering & Institute of New Energy, China University of Petroleum (East China), Qingdao, 266580, P. R. China
| | - Wen-Ting Wu
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering & Institute of New Energy, China University of Petroleum (East China), Qingdao, 266580, P. R. China
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