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• W2956581448 abstract "Solar‐driven photo‐electrochemical (PEC) water splitting paves a promising route toward the future of scalable hydrogen production. However, water oxidation dominated by hole carriers excited in the photoanode is a critical bottleneck that hampers PEC overall efficiency due to sluggish hole transfers and surface reaction kinetics for most semiconductors. Herein, dual interface layers including a buried p–n junction and an active catalytic surface to synergistically accelerate hole extraction and injection toward water oxidation over n‐type BiVO 4 photoanodes by successive deposition of discrete p‐type Co 3 O 4 and amorphous Co‐Fe‐layered double hydroxide (CoFe‐LDH) are introduced. Compared with the bare BiVO 4 photoanode, the resultant BiVO 4 /Co 3 O 4 /CoFe‐LDH photoanode yields a near fourfold enhanced photocurrent density of 3.9 mA cm −2 at 1.23 V RHE with a cathodic shift of ≈410 mV at onset potential under AM 1.5G illumination. Stoichiometric oxygen and hydrogen generation with a Faraday efficiency of unity over 10 h enable an outstanding applied bias solar‐to‐hydrogen efficiency of 1.23%, among the best records for reported single‐photon photoanodes. Furthermore, the decoupled dynamics analysis determines that the designed dual interfaces contribute to both hole extraction efficiency of up to 90% and a surface injection efficiency of up to 71%. This work describes an effective strategy of interface engineering to steer hole dynamics in solar fuel conversion devices." @default.
• W2956581448 created "2019-07-23" @default.
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• W2956581448 date "2019-07-31" @default.
• W2956581448 modified "2023-10-13" @default.
• W2956581448 title "Engineering Interfaces to Steer Hole Dynamics of BiVO ₄ Photoanodes for Solar Water Oxidation" @default.
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• W2956581448 doi "https://doi.org/10.1002/solr.201900115" @default.
• W2956581448 hasPublicationYear "2019" @default.
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