posted on 2024-02-29, 12:03authored bySeulgi Jeong, Ungsoo Kim, Sangjin Lee, Yihan Zhang, Eunbin Son, Kyoung-Jin Choi, Young-Kyu Han, Jeong Min Baik, Hyesung Park
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.