UNIST Develops Artificial Leaf for Hydrogen Production Using Indoor LED Light
Researchers at UNIST have created an artificial leaf that efficiently produces hydrogen using indoor LED lighting, achieving 94% performance retention over 12 hours. The innovation utilizes a sulfide-nickel catalyst and a specially designed photoelectrode to convert indoor light, which constitutes 19% of global electricity use, into clean hydrogen.
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The UNIST research team has developed an artificial leaf capable of producing hydrogen under indoor LED lighting. The system employs a sulfide-based photoelectrode that absorbs weak light to generate charge particles, which then react with water at a 3D nickel catalyst, producing hydrogen.
This design minimizes photo-corrosion and maximizes charge utilization, achieving a photocurrent comparable to expensive platinum catalysts without external voltage. A module of four artificial leaves recorded a total photocurrent of 5 mA. The team aims to enhance hydrogen separation technologies for commercialization.
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