燃料化学学报（中英文）2025，Vol.53Issue(10)：1500-1508,9.DOI:10.1016/S1872-5813(25)60546-9
氧化铁负载纳米银催化剂的制备及电催化丙烯环氧化机制研究
Synthesis of FeOx-supported nano-silver catalyst and the mechanism of electrocatalytic epoxidation of propylene
摘要
Abstract
The electrochemical oxidation of propylene offers a promising green process route for propylene oxide(PO)synthesis.However,due to complex by-products and low yields,its development has been hampered.Therefore,it is crucial to explore the reaction mechanism of propylene epoxidation to guide the targeted design of efficient catalysts.In this work,FeOx-supported nano-silver catalysts(Ag-Fe2O3)were designed to achieve the efficient utilization of noble metal Ag to use for the electro-catalytic epoxidation of propylene,and the Ag loading in Fe2O3 was regulated by a hydrothermal method combined with a co-precipitation method.When the loading of Ag in Fe3O3 is 1.82％,it effectively enhanced the efficiency of the propylene epoxidation reaction,with the Faraday efficiency of 26.2％for PO,and its performance was superior to that of Fe2O3 and other samples with different loadings.The bifunctional mechanism was clarified by in situ attenuated total reflection surface-enhanced infrared absorption spectroscopy(ATR-SEIRAS),where propylene was adsorbed on the surface of Fe2O3 and the nano-Ag sites promoted the generation of reactive oxygen species such as*O and*OOH.This work elucidates synergistic catalytic effect between metal and support,provides new mechanistic insights for the electrochemical epoxidation of propylene,and offers possible theoretical guidance for the design of high-performance catalysts.关键词
丙烯环氧化/氧化铁/纳米银/协同催化Key words
propylene epoxidation/FeOx/nano-silver/synergistic catalytic分类
化学化工引用本文复制引用
皮登文,杨小博,李旭宁..氧化铁负载纳米银催化剂的制备及电催化丙烯环氧化机制研究[J].燃料化学学报（中英文）,2025,53(10):1500-1508,9.基金项目
The project was supported by the National Natural Science Foundation of China(22478377),CAS Project for Young Scientists in Basic Research(YSBR-022)and the Liaoning Foundation for Excellent Young Scholars(2025JH6/101000018).国家自然科学基金(22478377),中国科学院青年科学家基础研究(YSBR-022)和辽宁省优秀青年学者基金(2025JH6/101000018)资助 （22478377）
