Highly Durable and Efficient Ni-FeOx/FeNi3 Electrocatalysts Synthesized by a Facile In Situ Combustion-Based Method for Overall Water Splitting with Large Current Densities

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Abdul Qayum
  • Jianfa Yuan
  • Yuanduo Qu
  • Jianhong Zhou
  • Zanling Huang
  • Hong Xia
  • Zhi Liu
  • Daniel Qi Tan
  • Fushen Lu
  • Liangsheng Hu

Detail(s)

Original languageEnglish
Pages (from-to)27842-27853
Journal / PublicationACS Applied Materials & Interfaces
Volume14
Issue number24
Online published10 Jun 2022
Publication statusPublished - 22 Jun 2022

Abstract

Ni-/Fe-based materials are promising electrocatalysts for the oxygen evolution reaction (OER) but usually are not suitable for the hydrogen evolution reaction (HER). Herein, a durable and bifunctional catalyst consisting of Ni-FeOx and FeNi3 is prepared on nickel foam (Ni-FeOx/FeNi3/NF) by in situ solution combustion and subsequent calcination to accomplish efficient alkaline water splitting. Density functional theory (DFT) calculation shows that the high HER activity is attributed to the strong electronic coupling effects between FeOx and FeNi3 in the Janus nanoparticles by modulating ΔGH* and electronic states. Consequently, small overpotentials (η) of 71 and 272 mV in HER and 269 and 405 mV in OER yield current densities (j) of 50 and 1000 mA cm-2, respectively. The catalyst shows outstanding stability for 280 and 200 h in HER and OER at a j of ∼50 mA cm-2. Also, the robustness and mechanical stability of the electrode at an elevated j of ∼500 mA cm-2 are excellent. Moreover, Ni-FeOx/FeNi3/NF shows excellent water splitting activities as a bifunctional catalyst as exemplified by j of 50 and 500 mA cm-2 at cell voltages of 1.58 and 1.80 V, respectively. The Ni-FeOx/FeNi3/NF structure synthesized by the novel, simple, and scalable strategy has large potential in commercial water electrolysis, and the in situ combustion method holds great promise in the fabrication of thin-film electrodes for different applications.

Research Area(s)

  • bifunctional electrocatalysts, electrocatalysts, FeOx/FeNi3, hydrogen evolution reaction, in situ combustion method, Janus nanoparticles, oxygen evolution reaction

Citation Format(s)

Highly Durable and Efficient Ni-FeOx/FeNi3 Electrocatalysts Synthesized by a Facile In Situ Combustion-Based Method for Overall Water Splitting with Large Current Densities. / Qayum, Abdul; Peng, Xiang; Yuan, Jianfa; Qu, Yuanduo; Zhou, Jianhong; Huang, Zanling; Xia, Hong; Liu, Zhi; Tan, Daniel Qi; Chu, Paul K.; Lu, Fushen; Hu, Liangsheng.

In: ACS Applied Materials & Interfaces, Vol. 14, No. 24, 22.06.2022, p. 27842-27853.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review