第41卷第3期Vol.41No.3材料科学与工程学报JournalofMaterialsScience&Engineering总第203期Jun.2023文章编号:1673-2812(2023)03-0373-06Co/rGO复合材料的制备及其氧还原性能董冰1,石碧清1,赵洁妤1,裴培1,金泥沙2,董亚荣2(1.河北环境工程学院环境工程系,河北秦皇岛066102;2.河北环境工程学院环境技术研究与实验中心,河北秦皇岛066102)【摘要】为解决燃料电池中氧还原反应(ORR)动力学迟缓,减少贵金属Pt的使用,本研究提出了一种原位制备还原氧化石墨烯负载Co纳米粒子(Co/rGO)复合催化剂的方法。采用X射线衍射(XRD)、拉曼光谱(Raman)、透射电子显微镜(TEM)、选区电子衍射、N2-吸脱附等技术手段对所制备的催化剂进行了表征。结果表明,Co/rGO-700复合催化剂保持了石墨烯的大尺寸二维结构,具有高比表面积和丰富缺陷,且Co纳米粒子尺寸均一、分布均匀。这些结构特点使得复合催化剂在ORR中展示出良好的催化性能,Co/rGO-700起始电位接近商用Pt/C催化剂,极限电流密度高于商用Pt/C催化剂,具有良好的稳定性。【关键词】钴纳米粒子;石墨烯;氧还原反应;复合催化剂中图分类号:TQ152;TB333文献标志码:ADOI:10.14136/j.cnki.issn1673-2812.2023.03.005SynthesisandPropertiesofCo/rGOCompositesforOxygenReductionReactionDONGBing1,SHIBiqing1,ZHAOJieyu1,PEIPei1,JINNisha2,DONGYarong2(1.DepartmentofEnvironmentalEngineering,HebeiInstituteofEnvironmentalEngineering,Qinhuangdao066102,China;2.EnvironmentalTechnologyResearchandExperimentCenter,HebeiInstituteofEnvironmentalEngineering,Qinhuangdao066102,China)【Abstract】Inordertosolvetheslowkineticsofoxygenreductionreaction(ORR)infuelcellsandreducetheuseofpreciousmetalPt,amethodforin-situpreparationofreducedgrapheneoxidesupportedConanoparticles(Co/rGO)compositecatalystswasproposed,andthepreparedcatalystswerecharacterizedbyXRD,Raman,TEM,SAEDandBET.TheresultsshowthattheCo/rGO-700compositecatalystmaintainsthelarge-sizetwo-dimensionalstructure,hasahighspecificsurfaceareaandrichdefectsites,andthesizeanddistributionofConanoparticlesareuniform.ThesecharacteristicsmakethecompositecatalystshowsagoodcatalyticactivityinORR.TheonsetpotentialofCo/rGO-700isclosetocommercialPt/CandthelimitingcurrentdensityishigherthanthatofcommercialPt/C.Moreover,it...
