Superaerophobic/Superhydrophilic Multidimensional Electrode System for High-Current-Density Water Electrolysis.
basic_science · Level V
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- Record sourced from PubMed, PMID 38420914.
- Also identified by DOI 10.1021/acsnano.3c12533.
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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) PrBa<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>1.5</sub>Fe<sub>0.5</sub>O<sub>5+δ</sub> (PBSCF)-Ni<sub>3</sub>S<sub>2</sub> as a self-supported catalytic electrode via interface and morphology engineering. This unique heterodimensional nanostructure of the PBSCF-Ni<sub>3</sub>S<sub>2</sub> system demonstrates superaerophobic/superhydrophilic features and maximizes the exposure of the highly active heterointerface, endowing the PBSCF-Ni<sub>3</sub>S<sub>2</sub> 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<sup>-2</sup>). This study provides important insights into the development of catalytic electrodes for efficient and stable large-scale hydrogen production systems.