纳米氧化镍的表面沉积修饰及催化氧化选择性调控应用研究  

Surface deposition modification of nano nickel oxide and tuning selectivity of catalytic oxidation

作　　者：杜凯敏 刘春红 胡晨晖 祁志福 卓佐西 DU Kai-min;LIU Chun-hong;HU Chen-hui;QI Zhi-fu;ZHUO Zuo-xi(Zhejiang Baima Lake Laboratory Co.Ltd.,Hangzhou 310000,China)

机构地区：[1]浙江省白马湖实验室有限公司,浙江杭州310000

出　　处：《化学研究与应用》2023年第4期930-935,共6页Chemical Research and Application

摘　　要：采用液相沉积表面改性修饰纳米NiO制备NiO@xSi复合材料,利用XRD、SEM、XPS、H_(2)-TPR分别对样品的物相、形貌尺寸、表面性质、氧化还原能力等进行表征,并研究其在丙烷选择性催化氧化脱氢制丙烯反应中的性能。表征分析结果表明,经表面沉积修饰后,NiO@xSi依然可保持10nm左右的尺寸粒径,表面Si与NiO之间存在强烈的电子相互作用,NiO主体的深度氧化能力有所抑制。在丙烷选择性催化氧化脱氢制丙烯反应中,NiO@xSi表现出较好的丙烯选择性调控能力,以NiO@1.0Si为例在相同活性转化率下表现出优于NiO样品2~3倍的丙烯选择性。该表面沉积修饰策略有助于研究其他选择性催化氧化反应的产物选择性调控。NiO@xSi composites were prepared by surface modifingNiO via liquid deposition.XRD,SEM,XPS and H_(2)-TPR were used to characterize the phase,morphology,size,surface properties and redox ability of the samples.The performance of oxidative dehydrogenation of propane to propene reaction on NiO@xSiwas studied.The particle size of NiO@xSicomposites maintained 10 nm.There was a strong electronic interaction between Si and NiOonNiO@xSi composites,and the deep oxidation ability of NiOwas inhibited after modifiedwith Si.NiO@xSicomposites showed great ability of tuning propene selectivity in propane oxidative dehydrogenation reaction,particularlyNiO@1.0Si,which showed a selectivity 2~3 times higher than NiO towards the production of propene.The surface deposition modification strategy pplications in other selective catalytic oxidation reactions.

关 键 词：纳米氧化镍 表面沉积 选择性催化氧化 选择性调控 

分 类 号：O643.3[理学—物理化学]