Oxidation of glycerol with H_2O_2 on Pb-promoted Pd/γ-Al_2O_3 catalysts  

Pb促进的Pd/γ-Al_2O_3催化剂上H_2O_2氧化甘油反应（英文）

作　　者：María L.Faroppa Juan J.Musci María E.Chiosso Claudia G.Caggiano Hernán P.Bideberripe José L.García Fierro Guillermo J.Siri Mónica L.Casella 

机构地区：[1]布宜诺斯艾利斯西北国立大学,CIBA(CIT UNNOBA,CONICET) [2]拉普拉塔国立大学科学学院,CINDECA(CCT La Plata-CONICET,UNLP) [3]拉普拉塔国立大学工程学院PIDCAT [4]西班牙国家研究委员会(CSIC)催化与石油化学研究所

出　　处：《Chinese Journal of Catalysis》2016年第11期1982-1990,共9页催化学报（英文）

基　　金：supported by CONICET(PIP 0276);UNLP(Projects X 700);UNNOBA(SIB 2924/14);Ministry of Education and Sports(Call "Jorge Sabato" Project 44-144-415),Argentina

摘　　要：A series of bimetallic Pd-Pb catalysts with a constant Pd content of 1 wt%and Pb/Pd atomic ratio from 0 to 1.6 supported on γ-Al2O3 were prepared and used for glycerol oxidation with H2O2 as the oxidizing agent at atmospheric pressure,45℃ and pH =11.The morphology and dispersion of the catalysts were characterized by scanning electron microscopy-energy dispersive X-ray spectroscopy（SEM-EDX） and transmission electron microscopy（TEM）.The presence of an alloy phase in the bimetallic catalyst was detected by X-ray photoelectron spectroscopy（XPS）.Glycerol conversion obtained with the monometallic Pd catalyst was 19%,which was increased to 100%with the addition of Pb.The four bimetallic PdPb catalysts were able to oxidize glycerol to dihydroxyacetone（DIHA） and the selectivity to DIHA reached 59%,58%,34%and 25%for PdPb0.25,PdPb0.50,PdPb1.00 and PdPbl.60 catalysts,respectively.制备了Pd含量为1 wt%、不同Pb/Pd摩尔比的γ-Al_2O_3负载Pd-Pb双金属催化剂,并用于常压、45°C和pH=11条件下H_2O_2氧化甘油反应中.催化剂的形貌和分散度采用扫描电镜-X射线电子散射谱和透射电镜进行了表征;双金属催化剂中合金相用X射线光电子能谱进行了验证.单金属Pd催化剂上反应结束后甘油转化率为19%,但随着Pb的加入甘油转化率增大到约100%.所制四个不同Pb/Pd原子比的双金属催化剂Pd Pb0.25,Pd Pb0.50,Pd Pb1.00和Pd Pb1.60均可氧化甘油至二羟基丙酮(DIHA),反应结束后DIHA选择性分别可达59%,58%,34%和25%.

关 键 词：PALLADIUM Bimetallic palladium-lead catalyst Hydrogen peroxide Glycerol oxidation Glyceric acid Glycolic acid 

分 类 号：O643.36[理学—物理化学]