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Formation of Ni–Fe Mixed Diselenide Nanocages as a Superior Oxygen Evolution Electrocatalyst

Journal Article


Abstract


  • Exploring effective electrocatalysts is a crucial requirement for boosting the efficiency of water splitting to obtain clean fuels. Here, a self-templating strategy is reported to synthesize Ni–Fe mixed diselenide cubic nanocages for the electrocatalytic oxygen evolution reaction (OER). The diselenide nanocages are derived from corresponding Prussian-blue analog nanocages, which are first obtained by treating the nanocube precursor with a site-selective ammonia etchant. The resulting Ni–Fe mixed diselenide nanocages perform as a superior OER electrocatalyst, which affords a current density of 10 mA cm−2 at a small overpotential of 240 mV; a high current density, mass activity, and turnover frequency of 100 mA cm−2, 1000 A g−1, and 0.58 s−1, respectively, at the overpotential of 270 mV; a Tafel slope as small as 24 mV dec−1; and excellent stability in alkaline medium.

Authors


  •   Nai, Jianwei (external author)
  •   Lu, Yan
  •   Yu, Le (external author)
  •   Wang, Xin (external author)
  •   Lou, Xiongwen (external author)

Publication Date


  • 2017

Citation


  • Nai, J., Lu, Y., Yu, L., Wang, X. & Lou, X. (2017). Formation of Ni–Fe Mixed Diselenide Nanocages as a Superior Oxygen Evolution Electrocatalyst. Advanced Materials, 29 (41), 1703870-1-1703870-8.

Scopus Eid


  • 2-s2.0-85030122505

Start Page


  • 1703870-1

End Page


  • 1703870-8

Volume


  • 29

Issue


  • 41

Place Of Publication


  • Germany

Abstract


  • Exploring effective electrocatalysts is a crucial requirement for boosting the efficiency of water splitting to obtain clean fuels. Here, a self-templating strategy is reported to synthesize Ni–Fe mixed diselenide cubic nanocages for the electrocatalytic oxygen evolution reaction (OER). The diselenide nanocages are derived from corresponding Prussian-blue analog nanocages, which are first obtained by treating the nanocube precursor with a site-selective ammonia etchant. The resulting Ni–Fe mixed diselenide nanocages perform as a superior OER electrocatalyst, which affords a current density of 10 mA cm−2 at a small overpotential of 240 mV; a high current density, mass activity, and turnover frequency of 100 mA cm−2, 1000 A g−1, and 0.58 s−1, respectively, at the overpotential of 270 mV; a Tafel slope as small as 24 mV dec−1; and excellent stability in alkaline medium.

Authors


  •   Nai, Jianwei (external author)
  •   Lu, Yan
  •   Yu, Le (external author)
  •   Wang, Xin (external author)
  •   Lou, Xiongwen (external author)

Publication Date


  • 2017

Citation


  • Nai, J., Lu, Y., Yu, L., Wang, X. & Lou, X. (2017). Formation of Ni–Fe Mixed Diselenide Nanocages as a Superior Oxygen Evolution Electrocatalyst. Advanced Materials, 29 (41), 1703870-1-1703870-8.

Scopus Eid


  • 2-s2.0-85030122505

Start Page


  • 1703870-1

End Page


  • 1703870-8

Volume


  • 29

Issue


  • 41

Place Of Publication


  • Germany