文献类型：期刊文献

英文题名：Alkaline Earth Carbonate Engineered Pt Electronic States for High-Efficiency Propylene Oxidation at Low Temperatures

作者：Sun, Xuequan[1];Lv, Yishu[2];Shu, Yuan[3];Guo, Yanglong[1];Zhang, Pengfei[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]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;[3]Ningxia Univ, Coll Chem & Chem Engn, State Key Lab High Efficiency Utilizat Coal Green, Yinchuan 750021, Peoples R China

年份：2025

卷号：15

期号：8

外文期刊名：CATALYSTS

收录：;EI(收录号：20253519085419);WOS:【SCI-EXPANDED(收录号:WOS:001559000600001)】；

基金：This work was supported by the National Natural Science Foundation of China (grant no. U24A20529, 22308172, 22178219), Natural Science Foundation of Ningxia Province [grant number 2023BSB03068], National Key R & D Program Plan (2022YFA1504803), Inner Mongolia R &D Program Plan (2021ZD0042, 2021EEDSCXSFQZD006, 2021GG0350), Ordos R&D Program (2121HZ231-8), The Central Guidance for Local Scientific and Technological Development Funds of China (No. 2022FRD05017).

语种：英文

外文关键词：metal-support interactions; alkaline earth carbonate; low-temperature propylene combustion; MvK mechanism; competitive adsorption

摘要：Alkaline earth elements have emerged as crucial electronic modifiers for regulating active sites in catalytic systems, yet the influence of metal-support interactions (MSIs) between alkaline earth compounds and active metals remains insufficiently understood. This study systematically investigated Pt nanoparticles supported on alkaline earth carbonates (Pt/MCO3, M = Mg, Ca, Ba) for low-temperature propylene combustion. The Pt/BaCO3 catalyst exhibited outstanding performance, achieving complete propylene conversion at 192 degrees C, significantly lower than Pt/MgCO3 (247 degrees C) and Pt/CaCO3 (282 degrees C). The enhanced activity stemmed from distinct MSI effects among the supports, with Pt/BaCO3 showing the poorest electron enrichment and lowest propylene adsorption energy. Through kinetic analyses, 18O2 isotope labeling, and comprehensive characterization, the reaction was confirmed to follow the Mars-van Krevelen (MvK) mechanism. Pt/BaCO3 achieves an optimal balance between propylene and oxygen adsorption, a critical factor underlying its superior activity.