Nickel-Iron-Modified 2D Metal-Organic Framework as a Tunable Precatalyst for Electrochemical Water Oxidation

Shahar Binyamin, Ran Shimoni, Itamar Liberman, Raya Ifraemov, Ayelet Tashakory, Idan Hod

Research output: Contribution to journalArticlepeer-review

Abstract

Mixed-metal metal-organic framework (MOF)-based water oxidation precatalysts have aroused a great deal of attention due to their remarkable catalytic performance. Yet, despite significant advancement in this field, there is still a need to design new MOF platforms that allow simple and systematic control over the final catalyst’s metal composition. Here, we show that a Zr-BTB 2D-MOF could be used to construct a series of Ni-Fe-based oxide hydroxide water oxidation precatalysts with diverse Ni-Fe compositions. In situ Raman spectroscopy characterization revealed that the MOF precatalysts could be electrochemically converted to the active catalysts (NiFeOOH). In turn, it was found that the highest water oxidation activity was obtained with a catalyst containing a 47:53 Ni:Fe molar ratio. Additionally, the obtained catalyst is also active toward electrochemical methanol oxidation, exhibiting high selectivity toward the formation of formic acid. Hence, these results could pave the way for the development of efficient electrocatalytic materials for a variety of oxidative reactions.

Original languageEnglish
Pages (from-to)13849-13857
Number of pages9
JournalACS applied materials & interfaces
Volume16
Issue number11
DOIs
StatePublished - 20 Mar 2024
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2024 American Chemical Society

Keywords

  • catalysis
  • electrochemistry
  • metal−organic frameworks (MOFs)
  • porous materials
  • water oxidation

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