Superaerophobic/Superhydrophilic Multidimensional Electrode System for High-Current-Density Water Electrolysis

Seulgi Jeong, Ungsoo Kim, Sangjin Lee, Yihan Zhang, Eunbin Son, Kyoung Jin Choi, Young Kyu Han, Jeong Min Baik, Hyesung Park

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Water electrolysis is emerging as a promising renewable-energy technology for the green production of hydrogen, which is a representative and reliable clean energy source. From economical and industrial perspectives, the development of earth-abundant non-noble metal-based and bifunctional catalysts, which can simultaneously exhibit high catalytic activities and stabilities for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER), is critical; however, to date, these types of catalysts have not been constructed, particularly, for high-current-density water electrolysis at the industrial level. This study developed a heterostructured zero-dimensional (0D)-one-dimensional (1D) PrBa0.5Sr0.5Co1.5Fe0.5O5+δ (PBSCF)-Ni3S2 as a self-supported catalytic electrode via interface and morphology engineering. This unique heterodimensional nanostructure of the PBSCF-Ni3S2 system demonstrates superaerophobic/superhydrophilic features and maximizes the exposure of the highly active heterointerface, endowing the PBSCF-Ni3S2 electrode with outstanding electrocatalytic performances in both HER and OER and exceptional operational stability during the overall water electrolysis at high current densities (500 h at 500 mA cm-2). This study provides important insights into the development of catalytic electrodes for efficient and stable large-scale hydrogen production systems.

Original languageEnglish
Pages (from-to)7558-7569
Number of pages12
JournalACS Nano
Volume18
Issue number10
DOIs
StatePublished - 12 Mar 2024

Keywords

  • bifunctional electrocatalyst
  • heterostructure
  • high current density
  • mass transfer
  • multidimension

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