1. Fabrication of Nanostructured Medium-Entropy Oxides/Carbon Composites with Rich O Vacancy by a Soybean Polysaccharide Template for Hydrogen Evolution Reaction.
- Author
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Bin Amin A, Gao L, Zhou Y, Li X, Liu J, Zheng X, and Tang K
- Abstract
Highly efficient and durable electrocatalysts play a crucial role in promoting the hydrogen evolution reaction (HER). Among them, medium-entropy oxides (MEOs)-based electrocatalysts have attracted extensive attention due to the advantages of multiple principal components, lattice distortion, and a hysteresis diffusion effect. However, it is still challenging to design MEOs with rational structures and composition. In this work, soluble soybean polysaccharide (SSPS) is used as a template to fabricate an FeCoNiO
x /C composite. The crucial role of the SSPS template during the formation of FeCoNiOx MEOs is analyzed, which is in favor of the forming of an O vacancy and nanoparticle morphology with a sphere-like array. Owning to the synergistic effect of multiple principal components, conductive carbon material, and defective crystallinity, the O vacancy-modified FeCoNiOx /C composite has significantly superior electrocatalytic HER properties, which need a low overpotential of 61 mV to afford a 10 mA cm-2 current density with a Tafel slope of 90.7 mV dec-1 . The FeCoNiOx /C MEOs with superior electrocatalytic properties and facile fabrication provide a significant opportunity to constitute beneficial electrocatalysts for industrial application.- Published
- 2025
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