文献类型：期刊文献

英文题名：Multifunctional MoOx interfacial engineering on Pt/Al2O3 for steam-tolerant complete propane oxidation: Coupling hydroxyl-site blocking with proximal acidity

作者：Lv, Yao[1,2];Wang, Xin[1];Ge, Shasha[1];Xu, Aijie[1];Dai, Sheng[2];Ye, Jiajie[1,3];Jiang, Zhongyu[4];Dai, Qiguang[1];Wang, Aiyong[1];Guo, Yanglong[1];Zhan, Wangcheng[1];Wang, Li[1];Guo, Yun[1];Tang, Xuan[1,2]

机构：[1]East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem, Shanghai 200237, Peoples R China;[3]Sinochem Int Sci & Technol Innovat Ctr, Shanghai 201315, Peoples R China;[4]Cardiff Univ, Cardiff Catalysis Inst, Max Planck Cardiff Ctr Fundamentals Heterogeneous, Sch Chem, Cardiff CF24 4HQ, Wales

年份：2026

卷号：393

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20261420439406);WOS:【SCI-EXPANDED(收录号:WOS:001738517300001)】；

基金：This work was supported by the National Natural Science Foundation of China (22306063 and U21A20326) . The authors also thank the Research Center of Analysis and Test at ECUST for technique support.

语种：英文

外文关键词：Propane oxidation; Blocking effect; Proximal acidity; Steam tolerance; Pt/Al2O3

摘要：Complete propane oxidation at low temperatures remains challenging, especially under humid feeds. Here, we propose a multifunctional surface-modification strategy for Pt/Al2O3 by introducing MoOx to couple hydroxyl-site blocking guided Pt ensemble regulation with proximal acidity and suppressed support hydrophilicity. MoOx species competitively occupy reactive hydroxyl anchoring sites on gamma-Al2O3, thereby suppressing Pt dispersion and promoting the formation of larger, more metallic Pt nanoparticles with intimate Pt-MoOx contact. Meanwhile, MoOx generates acid sites near Pt, providing additional propane adsorption/activation capability and enabling richer surface intermediate evolution, which is consistent with weakened oxygen inhibition and enhanced propane dependence. The optimized Pt12Mo/Al2O3 catalyst achieves a markedly lower light-off temperature (T-90 = 230 degrees C) than Pt/Al2O3 (T-90 = 342 degrees C), delivering a similar to 46-fold higher intrinsic activity at 200 degrees C and a substantially reduced apparent activation energy. Importantly, MoOx-induced hydroxyl consumption lowers the density of hydrophilic sites and reduces overall H2O uptake, resulting in excellent steam tolerance and durability under 5 vol% H2O.