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1、学号：11428231常州大学毕业论文（2015届）题目Co@Pt/NG核壳催化剂的制备及其对乙醇电氧!化的催化活性学生朱佳伟学院石油化工专业班级应化112校内指导教师曹剑瑜专业技术职务副教授校外指导老师专业技术职务二○一五年六月第一章绪论Co@Pt/NG核壳催化剂的制备及其对乙醇电氧化的催化活性摘要：采用两步法合成Co@Pt/NG(Co/Pt=1:1)电催化剂，并在惰性气体保护下对催化剂进行热处理.通过高分辨透射电镜(HR-TEM)和X射线衍射(XRD)等技术对催化剂的微观结构和形貌进行表征.结果表
2、明:形成的Co@Pt/NG催化剂具有核壳结构,金属纳米颗粒均匀负载于碳上,其粒径分布范围较窄;热处理对催化剂的结构和形貌有较大影响.利用循环伏安(CV)法和线性伏安扫描(LSV)法表征催化剂的电化学活性、氧还原反应(ORR)动力学特性及耐久性.在电解质溶液（0.1mol/LHClO4）中，制备的Co@Pt/NG催化剂表现出良好的电化学性能,核壳结构的形成有助于提高Pt的利用率.动力学性能测试表明催化剂的ORR反应以四电子路线进行.相比于商用催化剂,核壳结构催化剂的耐久性和稳定性有很大程度的改善，并有望
3、降低催化剂的成本,在燃料电池领域表现出良好的应用前景.关键词：氮掺杂石墨烯；燃料电池；Co@Pt核壳结构催化剂；电化学性能29第一章绪论ThepreparationofCo@Pt/NGcore-shellcatalystandtheelectrocatalyticactivityoftheoxidatioofethanolAbstract:WetooktwostepstogetCo@Pt/NGcore-shellcatalyst,meanwhile,theobtainedcatalystwillgot
4、hroughthermaltreatmentundertheprotectionofinertgases.Afterthat,theywerecharacterizedbyhigh-resolutiontransmissionelectronmicroscopyandX-raydiffraction.TheresultshowsthatthestructureoftheCo@Pt/NGcatalystiscore-shell.Themetalnanoparticlesareuniformlydistr
5、ibutedoncarbonandtheparticlesizedistributionisnarrow.Besides,thestructureandmorphologyofthecatalystarealsoaffectedbythethermaltreatment.Weusethecyclicvoltammetry(CV)andlinearcyclicvoltammetry(LSV)tocharacterizetheelectrochemicalactivityofthecatalystandt
6、hecharacteristicsanddurabilityofoxidationreductionkinetics.Intheelectrolytesolution,theCo@Pt/NGobtainedshowsgreatelectrochemicalproperty,meanwhile,thecore-shellstructurehelptoimprovetheutilizationofPt.ThekineticstestshowsthattheORRreactionofthecatalystg
7、oesonfourelectronicroute.Comparedwiththecommercialcatalyst,thecore-shellstructurecatalystwillshowapromisingfutureinfuelcellsintermsofthedurability,stabilityandthecostofthecatalyst.Keywords:nitrogen-dropedgraphene,fuelcells,Co@Pt/NGcore-shellcatalyst,ele
8、ctrochemicalproperty29第一章绪论目录摘要·······················································Abstract···················································目次·······················································1.引言·······················
