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大小:1.90 MB
页数:8页
时间:2020-04-12
《《钴-聚吡咯-碳载Pt催化剂的制备及其单电池性能研究》.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第43卷第3期燃料化学学报Vo1.43NO.32015年3月JournalofFuelChemistryandTechnologyMar.2015文章编号:0253—2409(2015)03-0352·08钴-聚吡咯-碳载Pt催化剂的制备及其单电池性能研究张路,林瑞-一,黄真,范仁杰,(1.同济大学新能源汽车工程中心,上海201804;2同济大学汽车学院,上海201804)摘要:采用脉冲微波辅助化学还原法制备了钴一聚吡咯一碳载Pt催化剂(Pt/Co.PPy—C),并将其作为阴极催化剂,组装单电池。考
2、察了电池运行温度和氢气/空气计量比对单电池性能的影响,并与商业Pt/C催化剂进行了耐久性实验比较。结果表明,运行温度为70℃,氢气与空气的计量比为1.2:2.5时单电池性能最佳。600mA/cm2'匣电流稳定运行150h耐久性测试中,以Pt/Co—PPy—C为阴极催化剂的单电池平均电压衰退率为0.119mV/h,是商业Pt/C催化剂的26%。耐久性测试前后,单电池的阴极电荷传递阻抗为7.176和8.767n,均比商业Pt./C催化剂阻抗小;Pt颗粒粒径从2.46nm增长N3.18nm,均小于商业Pt
3、/C催化剂的粒径。这表明,以Pt/Co—Pry—C催化剂为阴极催化剂制备的单电池性能优良,在质子交换膜燃料电池中有广泛的应用前景。关键词:聚吡咯;燃料电池;阴极催化剂;单电池;耐久性;氧还原反应中图分类号:0643文献标识码:AStudyonpreparationofcobalt-polypyrrole-carbonblacksupportedPtcatalystanditssinglecellperformanceZHANGLu,LINRui,HUANGZhen,FANRen-jie,(1.Cle
4、anEnergyAutomotiveEngineeringCenter,TongjiUniversity,Shanghai201804,China;2.SchoolofAutomotiveStudies,TongjiUniversity,Shanghai201804,China)Abstract:Cobalt-polypyrrole—carbonblacksupportedPtcatalyst(Pt/,Co—PPy—C)waspreparedbypulse—microwaveassistedchem
5、icalreductionandusedasacathodecatalystforoxygenreductionreaction(0RR)inasinglecell:theinfluenceofoperationtemperatureandH,/airstoichiometricratioonthecellperformanceswasinvestigated.incomparisonwiththecommercialPt/Ccatalyst.Theresultsindicatedmatthecel
6、lperformsbestat70oCandwithaH/Airratioof1.2:2.5.Duringthe150hdurabilitytestatagalvanostaticoperationconditionof600mA/cm,thevoltagedegradationratewithPt/Co—Pry—Casthecathodecatalystis0.119mV/h.about26%ofmatwiththecommercialPt/Ccatalyst。Thecathodechargetr
7、ansferimpedancesbeforeandafterdurabilitytestareabout7.176and8.767mohm.respectively.muchsmallerthanthosewiththePt//Ccatalyst.TheaverageparticlesizeofPtinPl/Co—PPy—Cisincreasedfrom2.46to3.18nm.alsosmallerthanthatforthePt//Ccatalyst.ThePt/,Co.Pry—Ccatalys
8、texhibitssuperiorperformancein0RRandmayhaveanenormousapplicationpotentialinfuelcel1.Keywords:polypyrrole;fuelcell;cathodecatalyst;singlecell;durability;oxygenreductionreaction20世纪70年代以来,导电聚合物日益受到世c)。电化学测试结果表明,Pd/PPy—C催化剂电极不界各国研究者的广泛关注J。
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