Pt基双金属催化对硝基苯酚还原反应  

Reduction Reaction of p-Nitrophenol Catalyzed by Pt-based Bimetal

作　　者：夏新萍 吴飞雄 朱筱庭 林乐 许嘉伟 许昊翔 XIA Xinping;WU Feixiong;ZHU Xiaoting;LIN Le;XU Jiawei;XU Haoxiang(College of Chemical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学化学工程学院,北京100029

出　　处：《化学反应工程与工艺》2024年第5期394-402,共9页Chemical Reaction Engineering and Technology

基　　金：大学生创新创业训练计划项目(20230010032)。

摘　　要：对硝基苯酚(4-NP)是具有一定代表性的水体污染物,使用硼氢化钠将其还原转化为对氨基苯酚,是可行的4-NP污染水体处理手段。本工作通过优化Pt基合金组分与比例,筛选出催化硼氢化钠催化还原4-NP活性高的TiO_(2)负载铂铜纳米合金(Pt_(2)Cu_(3)/TiO_(2))。通过动力学实验,把Pt_(2)Cu_(3)/TiO_(2)催化4-NP还原反应的“时间-浓度”数据转化为“反应速率-浓度”数据,证实该反应为一级反应并建立幂指数型动力学方程。依据Langmuir-Hinshelwood(L-H)吸附反应机理,回归拟合本征动力学方程式的未知参数,包括反应速率常数、反应底物吸附常数、表观活化能等热力学参数。p-Nitrophenol(4-NP)is a representative pollutant in water.Reduction to p-aminophenol by sodium borohydride is a feasible water treatment method.In this work,TiO_(2)-supported platinum copper nanoalloys(Pt_(2)Cu_(3)/TiO_(2))with high 4-NP activity for catalytic reduction through sodium borohydride were prepared and screened by impregnation method.Through kinetic experiments,the"time-concentration"data of the 4-NP reduction reaction catalyzed by Pt_(2)Cu_(3)/TiO_(2)was converted into"reaction rate-concentration"data,which confirmed that the reaction was a first-order reaction and established the kinetic equation of power exponential type.According to the Langmuir-Hinshelwood(L-H)adsorption reaction mechanism,the unknown parameters of the intrinsic kinetic equation were regression fitted,including the reaction rate constant,the adsorption constant of the reaction substrate,the apparent activation energy and other thermodynamic parameters.

关 键 词：对硝基苯酚还原 双金属纳米合金催化剂 催化反应动力学方程 反应器模拟与设计 

分 类 号：TQ426.8[化学工程]