过渡金属氧化物催化剂制备及其在氧化反应中的性能研究
杨晓军 , 蔡彦迪 , 吴功德 , 王晓丽 , 万杰 , 刘雁军 , 金振强
现代化工 ›› 2026, Vol. 46 ›› Issue (7) : 153 -157.
过渡金属氧化物催化剂制备及其在氧化反应中的性能研究
Preparation of transition metal oxide catalysts and their performance in oxidation reactions
为解决贵金属催化剂在苯甲醇氧化反应中成本高、易烧结且易中毒的问题,采用共沉淀法制备了多种过渡金属复合氧化物催化剂。通过傅里叶变换红外光谱(FT-IR)、热重分析(TG)、氢气程序升温还原(H2-TPR)、透射电镜(TEM)及扫描电镜(SEM)等手段对催化剂进行表征,并系统探究其在苯甲醇及甲苯、甘油等其他物质氧化反应中的催化性能。结果表明,Mn1.5Mg1.5Al复合氧化物催化剂表现最优。表征分析显示,Mn1.5Mg1.5Al复合氧化物催化剂的层状结构与丰富孔隙提供了充足活性位点,表面羟基利于反应物吸附活化,且其主要含Mn4+和Mn3+活性物种,氧化还原能力强,这是其催化活性优异的核心原因。本研究证实Mn1.5Mg1.5Al复合氧化物催化剂是一种高效、稳定且廉价的催化剂,在苯甲醇等氧化反应中具有潜在应用价值。
To address the issues of high cost,easy sintering,and susceptibility to poisoning of noble metal catalysts in the oxidation reaction of benzyl alcohol,this study prepared a variety of transition metal composite oxide catalysts by the co-precipitation method.The catalysts were characterized using techniques including Fourier Transform Infrared Spectroscopy (FT-IR),Thermogravimetric Analysis (TG),Hydrogen Temperature-Programmed Reduction (H2-TPR),Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM).Meanwhile,their catalytic performance in the oxidation reactions of benzyl alcohol and other substances such as toluene and glycerol was systematically investigated.The results showed that the Mn1.5Mg1.5Al composite oxide catalyst exhibited the optimal performance.Characterization analysis revealed that the layered structure and abundant pores of the Mn1.5Mg1.5Al composite oxide catalyst provided sufficient active sites,and the surface hydroxyl groups were conducive to the adsorption and activation of reactants.Additionally,the catalyst mainly contained Mn4+ and Mn3+ active species,which gave it strong redox capacity—these are the core reasons for its excellent catalytic activity.This study confirms that the Mn1.5Mg1.5Al composite oxide catalyst is an efficient,stable and low-cost catalyst,and has potential application value in the oxidation reactions of benzyl alcohol and other compounds.
过渡金属氧化物催化剂 / 共沉淀法 / 氧化反应 / 氧化还原 / 苯甲醇
transition metal oxide catalysts / co-precipitation method / oxidation reaction / redox capacity / benzyl alcohol
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任玉荣, 刘宇权, 艾亚男, |
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安徽省重点研发计划项目(202104g01020006)
江苏省重点研发计划项目(BE2018718)
南京工程学院校级科研基金(YKJ202443)
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