淡江大學機構典藏:Item 987654321/124068
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 64198/96992 (66%)
造访人次 : 7930293      在线人数 : 2442
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜寻范围 查询小技巧：
  • 您可在西文检索词汇前后加上"双引号"，以获取较精准的检索结果
  • 若欲以作者姓名搜寻，建议至进阶搜寻限定作者字段，可获得较完整数据
    •  进阶搜寻


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/124068


    题名: Concave Pt-Zn nanocubes with high-index faceted Pt skin as highly efficient oxygen reduction catalyst
    作者: M. Liu;B. A. Lu;G. Yang;P. Yuan;H. Xia;Y. Wang;K. Guo;S. Zhao;J. Liu;Y. Yu;W. Yan;C. L. Dong*;J. N. Zhang*
    关键词: Pt-Zn catalyst;high-index facets;oxygen reduction reaction;ultrathin Pt skin
    日期: 2022-02-24
    上传时间: 2023-05-12 12:08:21 (UTC+8)
    出版者: Wiley-VCH GmbH
    摘要: High dosage of expensive Pt to catalyze the sluggish oxygen reduction reaction (ORR) on the cathode severely impedes the commercialization of proton exchange membrane fuel cells. Therefore, it is urgent to cut down the Pt catalyst by efficiently improving the ORR activity while maintaining high durability. Herein, magic concave Pt–Zn nanocubes with high-index faceted Pt skin (Pt78Zn22) are proposed for high-efficiency catalysis toward proton exchange membrane fuel cells. These unique structural features endow the Pt-skin Pt78Zn22/KB with a mass activity of 1.18 mA μgPt–1 and a specific activity of 3.64 mA cm–2 for the ORR at 0.9 V (vs RHE). Meanwhile, the H2–O2 fuel cell assembled by this catalyst delivers an ultrahigh peak power density of ≈1449 mW cm–2. Both experiments and theoretical calculations show that the electronic structure of the surface is adjusted, thereby shortening the length of the Pt–Pt bond and reducing the adsorption energy of OH*/O* on the Pt surface. This work demonstrates the synergistic effect of the oxidation-resistant metal Zn and the construction of Pt-rich surface engineering. Also, it guides the future development of catalysts for their practical applications in energy conversion technologies and beyond.
    關聯: Advanced Science 9(12), 2200147
    DOI: 10.1002/advs.202200147
    显示于类别:[電機工程學系暨研究所] 期刊論文

    文件中的档案:

    档案 描述 大小格式浏览次数
    index.html0KbHTML72检视/开启

    在機構典藏中所有的数据项都受到原著作权保护.

    TAIR相关文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回馈