Enhancing catalytic H2 generation by surface electronic tuning of systematically controlled Pt-Pb nanocrystals
作者机构：College of ChemistryChemical engineering and Materials ScienceSoochow UniversitySuzhou 215123China Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARChina College of MaterialsBeijing Institute of TechnologyBeijing 100081China Department of Materials Science and EngineeringChina University of PetroleumBeijing 102249China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2019年第12卷第9期
页 面：2335-2340页
核心收录：
基 金：This work was financially supported by the National Key Technology R&D Program of China(Nos.2016YFA0204100 and 2017YFA0208200) the National Natural Science Foundation of China(No.21571135) Young Thousand Talented Program,the Natural Science Foundation of Jiangsu Higher Education Institutions(No.17KJB150032) the project of scientific and technologic infrastructure of Suzhou(No.SZS201708) the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD),and the start-up supports from Soochow University
主 题：surface electronic structure shape control PtPb nanocrystal hydrogen generation alcohol reforming
摘 要：Although many previous studies have show n that the shape-c ontrol of nano crystal(NCs)is an efficient strategy to improve the catalytic performance,these syntheses were conducted under very different conditions,which are not suitable for the shape-dependent properties studies as well as catalysis ***,we demonstrate an effective method for the selective synthesis of well-defined PtPb NCs in a highly con trollable *** disti net PtPb NCs,n amely PtPb pea nut nano crystals,PtPb hexag onal nan opiates,PtPb octahedra nano crystals(ONCs)and PtPb nan oparticles have been selectively prepared in the prese nee of differe nt phe *** ifica ntly,we found that the created PtPb NCs/C shows the shape-dependent activity with the optimized PtPb ONCs/C being the most active for the ethanol reforming to H2,22.4 times higher than the commercial Pt/*** high performance of PtPb ONCs/C has been also successfully expanded into other polyhydric alcohols reformings.X-ray photoelectron spectroscopy(XPS)reveals that the high Pt(O)/Pt(ll)ratio in PtPb NCs/C enhances the alcohols *** density functional theory(DFT)studies show the PtPb ONCs possess the highest surface averaged electronic occu patio n for unit Pt-atom,matchi ng well with XPS *** PtPb ONCs/C also displays excelle nt durability with limited activity decay and negligible structure/composition changes after ten *** work demonstrates an important advance in the high-level control of metallic nanostructures to tune the catalytic activities.
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