Three‐Dimensional Smart Catalyst Electrode for Oxygen Evolution Reaction

DOI Web Site Web Site 被引用文献1件
  • Sheng Chen
    School of Chemical Engineering The University of Adelaide Adelaide SA 5005 Australia
  • Jingjing Duan
    School of Chemical Engineering The University of Adelaide Adelaide SA 5005 Australia
  • Pengju Bian
    School of Physics The University of Sydney New South Wales 2006 Australia
  • Youhong Tang
    Centre for Nanoscale Science and Technology and Centre for Maritime Engineering, Control and Imaging Flinders University Adelaide 5042 Australia
  • Rongkun Zheng
    School of Physics The University of Sydney New South Wales 2006 Australia
  • Shi‐Zhang Qiao
    School of Chemical Engineering The University of Adelaide Adelaide SA 5005 Australia

書誌事項

公開日
2015-07-14
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/aenm.201500936
公開者
Wiley

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説明

<jats:p>A multifunctional catalyst electrode mimicking external stimuli–responsive property has been prepared by the in situ growth of nitrogen (N)‐doped NiFe double layered hydroxide (N–NiFe LDH) nanolayers on a 3D nickel foam substrate framework. The electrode demonstrates superior performance toward catalyzing oxygen evolution reaction (OER), affording a low overpotential of 0.23 V at the current density of 10 mA cm<jats:sup>−2</jats:sup>, high Faradaic efficiency of ≈98%, and stable operation for >60 h. Meanwhile, the electrode can dynamically change its color from gray silver to dark black with the OER happening, and the coloration/bleaching processes persist for at least 5000 cycles, rendering it a useful tool to monitor the catalytic process. Mechanism study reveals that the excellent structural properties of electrode such as 3D conductive framework, ultra thickness of N–NiFe LDH nanolayer (≈0.8 nm), and high N‐doping content (≈17.8%) make significant contribution to achieving enhanced catalytic performance, while N–NiFe LDH nanolayer on electrode is the main contributor to the stimuli‐responsive property with the reversible extraction/insertion of electrons from/into N–NiFe LDH leading to the coloration/bleaching processes. Potential application of this electrode has been further demonstrated by integrating it into a Zn–air battery device to identify the charging process during electrochemical cycling.</jats:p>

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