Trinary Layered Double Hydroxides as High‐Performance Bifunctional Materials for Oxygen Electrocatalysis

DOI Web Site Web Site 被引用文献7件
  • Li Qian
    State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology P.O. Box 98 Beijing 100029 P. R. China
  • Zhiyi Lu
    State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology P.O. Box 98 Beijing 100029 P. R. China
  • Tianhao Xu
    State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology P.O. Box 98 Beijing 100029 P. R. China
  • Xiaochao Wu
    State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology P.O. Box 98 Beijing 100029 P. R. China
  • Yang Tian
    State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology P.O. Box 98 Beijing 100029 P. R. China
  • Yaping Li
    State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology P.O. Box 98 Beijing 100029 P. R. China
  • Ziyang Huo
    Queensland Micro and Nanotechnology Centre Griffith University Queensland Australia
  • Xiaoming Sun
    State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology P.O. Box 98 Beijing 100029 P. R. China
  • Xue Duan
    State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology P.O. Box 98 Beijing 100029 P. R. China

書誌事項

公開日
2015-05-03
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/aenm.201500245
公開者
Wiley

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説明

<jats:p>Layered double hydroxides (LDHs) are a family of high‐profile layer materials with tunable metal species and interlayer spacing, and herein the LDHs are first investigated as bifunctional electrocatalysts. It is found that trinary LDH containing nickel, cobalt, and iron (NiCoFe‐LDH) shows a reasonable bifunctional performance, while exploiting a preoxidation treatment can significantly enhance both oxygen reduction reaction and oxygen evolution reaction activity. This phenomenon is attributed to the partial conversion of Co<jats:sup>2+</jats:sup> to Co<jats:sup>3+</jats:sup> state in the preoxidation step, which stimulates the charge transfer to the catalyst surface. The practical application of the optimized material is demonstrated with a small potential hysteresis (800 mV for a reversible current density of 20 mA cm<jats:sup>−2</jats:sup>) as well as a high stability, exceeding the performances of noble metal catalysts (commercial Pt/C and Ir/C). The combination of the electrochemical metrics and the facile and cost‐effective synthesis endows the trinary LDH as a promising bifunctional catalyst for a variety of applications, such as next‐generation regenerative fuel cells or metal–air batteries.</jats:p>

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