English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 60868/93650 (65%)
造訪人次 : 1147638      線上人數 : 20
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/120712


    題名: Probing the active site in single-atom oxygen reduction catalysts via operando X-ray and electrochemical spectroscopy
    作者: Lien, H. T.;Chang, S. T.;Chen, P. T.;Wong, D. P.;Chang, Y. C.;Lu, Y. R.;Dong, C. L.;Wang, C. H.;Chen, K. H.;Chen, L. C.
    關鍵詞: Characterization and analytical techniques;Electrocatalysis;Fuel cells
    日期: 2020-08-25
    上傳時間: 2021-05-05 12:11:48 (UTC+8)
    摘要: Nonnoble metal catalysts are low-cost alternatives to Pt for the oxygen reduction reactions (ORRs), which have been studied for various applications in electrocatalytic systems. Among them, transition metal complexes, characterized by a redox-active single-metal-atom with biomimetic ligands, such as pyrolyzed cobalt–nitrogen–carbon (Co–Nx/C), have attracted considerable attention. Therefore, we reported the ORR mechanism of pyrolyzed Vitamin B12 using operando X-ray absorption spectroscopy coupled with electrochemical impedance spectroscopy, which enables operando monitoring of the oxygen binding site on the metal center. Our results revealed the preferential adsorption of oxygen at the Co2+ center, with end-on coordination forming a Co2+-oxo species. Furthermore, the charge transfer mechanism between the catalyst and reactant enables further Co–O species formation. These experimental findings, corroborated with first-principle calculations, provide insight into metal active-site geometry and structural evolution during ORR, which could be used for developing material design strategies for high-performance electrocatalysts for fuel cell applications.
    關聯: Nature Communications 11, 4233 (8 pages)
    DOI: 10.1038/s41467-020-17975-y
    顯示於類別:[電機工程學系暨研究所] 期刊論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    index.html0KbHTML76檢視/開啟
    Probing the active site in single-atom oxygen reduction catalysts via operando X-ray and electrochemical spectroscopy.pdf1165KbAdobe PDF9檢視/開啟

    在機構典藏中所有的資料項目都受到原著作權保護.

    TAIR相關文章

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