文献类型：期刊文献

英文题名：Enhancing photocatalytic methane oxidation by coupling Pt-mediated charge transfer with hydrophobic triphase interface regulation

作者：Peng, Qiao[1,2,3];Xu, Chang[1,2,3];Zhang, Shengwei[1,2,3];Zhang, Jinlong[1,2,3];Lei, Juying[3];Ye, Ziwei[1,2,3];Wang, Lingzhi[1,2,3]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Inst Fine Chem, Feringa Nobel Prize Scientist Joint Res Ctr,State, Sch Chem & Mol Engn,Joint Int Lab Precis Chem & Mo, Shanghai, Peoples R China;[3]East China Univ Sci & Technol, Shanghai Engn Res Ctr Multimedia Environm Catalysi, Shanghai, Peoples R China

年份：2026

外文期刊名：RESEARCH ON CHEMICAL INTERMEDIATES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001786135400001)】；

基金：This work was supported by National Natural Science Foundation of China (22472056 to L.W. and 22461142136 to J.Z.), the Science and Technology Commission of Shanghai Municipality (24ZR1491000 to L.W.), and the Fundamental Research Funds for the Central Universities (222201717003 to J.Z.). The authors thank Research Center of Analysis and Test of East China University of Science and Technology for the help on the characterization.

语种：英文

外文关键词：Photocatalytic methane oxidation; In2O3; Pt cocatalyst; Hydrophobic modification; Triphase interface

摘要：The low solubility of methane in water and the resulting gas-liquid-solid mass-transfer limitation severely restrict the efficiency of photocatalytic selective methane oxidation. Herein, Pt-In2O3 catalysts were constructed and further modified with triethoxy-n-octylsilane (OTES) to achieve the synergistic enhancement of charge transfer and triphase mass transport. Pt loading and OTES grafting preserved the bulk crystal phase of In2O3, while establishing a Pt/In2O3 heterointerface and a hydrophobic surface layer. Pt mainly promoted photogenerated charge separation and interfacial electron transfer, whereas OTES had only a minor effect on the electronic process. Among the catalysts examined, the optimized catalyst showed the best performance, giving a total productivity of 4659.1 mu mol g(-1) h(-1), a liquid-phase productivity of 4116.7 mu mol g(-1) h(-1), and a liquid-product selectivity of 88.4%, with the liquid-phase productivity being 1.44 times that of the corresponding catalyst without OTES modification. The activity showed a volcano-type dependence on OTES dosage, indicating an optimal hydrophobic range. Trapping experiments, electron paramagnetic resonance (EPR), and chemical-probe analyses identified & centerdot;OH and & centerdot;O-2(-)/& centerdot;OOH as the key reactive species involved in the reaction. This work demonstrates that tuning interfacial wettability is an effective strategy for enhancing photocatalytic methane oxidation in water.