Morphology-controlled nickel-organic framework nanosheet arrays for efficient urea electrolysis in alkaline media

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Lijuan Huang
  • Nan Li
  • Jiaxiang Xiao
  • Hang Lou
  • Chao Xie
  • Yahui Yang
  • Hao Jiang

Detail(s)

Original languageEnglish
Article number118363
Journal / PublicationJournal of Electroanalytical Chemistry
Volume965
Online published19 May 2024
Publication statusPublished - 15 Jul 2024

Abstract

Urea electrolysis is considered as a promising energy-saving hydrogen production technique to substitute the water electrolysis, but it is restricted by the lack of efficient and cost-effective catalysts. Herein, nickel foam supported three-dimensional (3D) nickel-organic framework nanosheet arrays (Ni-BDC-t/NF, where t is the reaction time) comprising Ni2+ and an organic ligand of 4,4-biphenyl dicarboxylic acid (BDC) are synthesized as catalyst for urea electrolysis in alkaline media. Benefiting from the highly exposed Ni active sites and fast electron transfer rate endowed by 3D nanosheet array architecture, the structurally optimized Ni-BDC-10/NF exhibits preeminent electrocatalytic activity and durability toward urea oxidation reaction (UOR). To deliver a high current density of 100 mA cm−2, the required UOR potential of Ni-BDC-10/NF is only 1.50 V vs. RHE. Significantly, by further coupling with the cathodic hydrogen evolution reaction, the urea electrolysis system based on Ni-BDC-10/NF self-supporting anode exhibits a dramatic voltage decrease by 340 mV at a current density of 50 mA cm−2 as compared with that of water electrolysis under the same conditions. This study provides some new ideas for developing high-efficiency nickel-based organic framework catalysts and their application in urea-related energy storage devices. © 2024 Elsevier B.V.

Research Area(s)

  • Electrocatalytic activity, Energy-saving hydrogen production, Nanosheet arrays, Nickel-organic frameworks, Urea oxidation reaction

Citation Format(s)

Morphology-controlled nickel-organic framework nanosheet arrays for efficient urea electrolysis in alkaline media. / Huang, Lijuan; Li, Nan; Xiao, Jiaxiang et al.
In: Journal of Electroanalytical Chemistry, Vol. 965, 118363, 15.07.2024.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review