High-entropy oxide photocatalysts for green ammonia synthesis from nitrogen fixation in water
arXiv:2508.12558 · doi:10.1016/j.scriptamat.2025.116931
Abstract
Ammonia, a critical chemical fertilizer and a potential hydrogen carrier, can be sustainably synthesized from atmospheric nitrogen and water under ambient conditions through photocatalysis. In this study, high-entropy oxides with d0 and mixed d0+d10 cationic configurations are introduced as a new group of catalysts for nitrogen fixation and photocatalytic ammonia production. The oxides exhibit impressive efficiency in ammonia production compared to binary oxides, while the efficiency is improved by using a mixed cationic configuration. It was shown that the incorporation of d10 elements, such as gallium and zinc, boosts the photocatalytic reactions by improving light absorbance, charge separation and charge lifetime. These findings demonstrate the potential of high-entropy oxides as next-generation photocatalysts for green ammonia synthesis, offering an effective alternative to conventional catalytic systems.
References in corpus (9)
- Significant CO2 photoreduction on a high-entropy oxynitride
- Phase and sulfur vacancy engineering in cadmium sulfide for boosting hydrogen production from catalytic plastic waste photoconversion
- Developing a single-phase and nanograined refractory high-entropy alloy ZrHfNbTaW with ultrahigh hardness by phase transformation via high-pressure torsion
- Photoreforming of plastic waste into valuable products and hydrogen using a high-entropy oxynitride with distorted atomic-scale structure
- Severe Plastic Deformation of Ceramics by High-Pressure Torsion: Review of Principles and Applications
- Investigation of a high-entropy oxide photocatalyst for hydrogen generation by first-principles calculations coupled with experiments: Significance of electronegativity
- Mixed atomic-scale electronic configuration as a strategy to avoid cocatalyst utilization in photocatalysis by high-entropy oxides
- Efficient Photocatalytic Hydrogen Production on Defective and Strained Black Bismuth (III) Oxide
- Impact of high-pressure columbite phase of titanium dioxide (TiO2) on catalytic photoconversion of plastic waste and Simultaneous hydrogen (H2) production