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dc.contributor.author史坤明
dc.contributor.author郭建伟
dc.contributor.author王佳
dc.contributor.authorSHI Kun-ming
dc.contributor.authorGUO Jian-wei
dc.contributor.authorWANG Jia
dc.date.accessioned2016-11-04T03:03:40Z
dc.date.available2016-11-04T03:03:40Z
dc.date.issued2016-10-28
dc.identifier.citation电化学,2016,22(5):542-548.
dc.identifier.issn1006-3471
dc.identifier.urihttp://dx.doi.org/10.13208/j.electrochem.160310
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/127412
dc.description.abstract本文通过RDE和EIS联合技术、等效电路模型,研究了酸性体系中商业Pt/C催化剂ORR行为. 研究发现Pt/C动态界面包括两个彼此独立的过程:1)Pt表面原有PtO还原至Pt过程,2)ORR促进新PtO形成过程,为催化材料稳定性及活化性提供了关键依据;并发现动态界面促进多孔电极重构以及与传输匹配过程.在高过电位下,ORR的高反应速率可通过增加催化材料憎水性予以改善. 上述研究结果可对ORR的直流电化学研究进行有效补充,并提供建模基础.
dc.description.abstractWith joint techniques of rotating disc electrode(RDE) and electrochemical impedance spectroscopy(EIS), and further establishment on equivalent circuit model, this paper studied oxygen reduction reaction(ORR) on commercial Pt/C catalyst in acid medium. Our results found that the dynamical interface on Pt/C consists of two independent processes: 1) the PtO reduction from Pt surface, 2) the new PtO formation from ORR, thus providing key clues for catalyst stability and activity. This also implied that the dynamical interface facilitates reconstruction for porous electrode, and matches with mass transfer. One important issue is discovered that at high overpotential, the high reaction rate for ORR can be further improved if providing hydrophobicity on catalyst surface. All these efforts on ORR progress not only compensate for DC electrochemistry study, but also provide basis for future model establishment.
dc.description.sponsorship国家自然科学基金项目(51273103, 50873050, 51573084)、国家973计划(2012CB215500)资助
dc.language.isozh
dc.publisher厦门大学《电化学》编辑部
dc.relation.ispartofseries研究论文
dc.relation.ispartofseriesArticles
dc.source.urihttp://electrochem.xmu.edu.cn/CN/abstract/abstract10275.shtml
dc.subject燃料电池
dc.subjectPt/C催化剂
dc.subject氧还原反应
dc.subject旋转圆盘电极
dc.subject电化学阻抗谱
dc.subjectfuel cells
dc.subjectPt/C catalyst
dc.subjectoxygen reduction reaction
dc.subjectrotating disk electrode
dc.subjectelectrochemical impedance spectroscopy
dc.titlePt/C催化剂氧还原反应的交流阻抗动态研究
dc.title.alternativeThe Study of Dynamical Electrochemical Impedance Spectroscopy for Oxygen Reduction Reaction on Pt/C Catalyst
dc.typeArticle
dc.description.note作者联系地址:1.中国海洋大学化学化工学院,山东青岛 266003; 2. 清华大学核能与新能源技术研究院,北京 100084
dc.description.noteAuthor's Address: 1 College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003,Shandong, China; 2 Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
dc.description.note通讯作者E-mail:jwguo@mail.tsinghua.edu.cn


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