Synthesis of palladium-rhodium bimetallic nanoparticles for formic acid dehydrogenation

作     者：Ilaria Barlocco Sofia Capelli Elisa Zanella Xiaowei Chen Juan JDelgado Alberto Roldan Nikolaos Dimitratos Alberto Villa Ilaria Barlocco;Sofia Capelli;Elisa Zanella;Xiaowei Chen;Juan J.Delgado;Alberto Roldan;Nikolaos Dimitratos;Alberto Villa

作者机构：Dipartimento di ChimicaUniversitàdegli Studi di MilanoMilan I-20133Italy Departamento de Ciencia de los MaterialesIngeniería Metalúrgica y Química InorgánicaFacultad de CienciasUniversidad de CádizCampus Río San PedroPuerto Real(Cádiz)E-11510Spain School of ChemistryCardiff UniversityMain BuildingPark PlaceCF103AT CardiffUnited Kingdom Dipartimento di Chimica Industriale e dei MaterialiAlma Mater Studiorum Universitàdi BolognaViale Risorgimento 4I-40136 BolognaItaly 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2021年第30卷第1期

页      面：301-309,I0010页

核心收录：

学科分类：081702[工学-化学工艺] 081705[工学-工业催化] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

主　　题：Palladium Rhodium Alloy Formic acid Hydrogen Muconic acid 

摘      要：Herein,we report for the first time the synthesis of preformed bimetallic Pd-Rh nanoparticles with different Pd:Rh ratios(nominal molar ratio:80-20,60-40,40-60,20-80) and the corresponding Pd and Rh monometallic ones by sol immobilization using polyvinyl alcohol(PVA) as protecting agent and NaBH4 as reducing agent,using carbon nanofibers with high graphitization degree(HHT) as the desired *** synthesized catalysts were characterized by means of Transmission Electron Microscopy(TEM) and inductively coupled plasma optical emission spectroscopy(ICP-OES).TEM shows that the average particle size of the Pd-Rh nanoparticles is the range of 3-4 nm,with the presence of few large agglomerated *** bimetallic catalysts,EDX-STEM analysis of individual nanoparticles demonstrated the presence of random-alloyed nanoparticles even in all cases Rh content is lower than the nominal one(calculated Pd:Rh molar ratio:90-10,69-31,49-51,40-60).The catalytic performance of the Pd-Rh catalysts was evaluated in the liquid phase dehydrogenation of formic acid to *** was found that Pd-Rh molar ratio strongly influences the catalytic ***-rich catalysts were more active than Rh-rich ones,with the highest activity observed for Pd90:Rh10(1792 h^(-1)),whereas Pd69:Rh31(921 h^(-1)) resulted the most stable during recycling ***,Pd90:Rh10 was chosen as a representative sample for the liquid-phase hydrogenation of muconic acid using formic acid as hydrogen donor,showing good yield to adipic acid.