Single-atomic ruthenium coupling with NiFe layered double hydroxide in-situ growth on BiVO₄ photoanode for boosting photoelectrochemical water splitting
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Publication date
01/2024
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01A - Journal article
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Applied Catalysis B: Environmental
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340
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123269
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Elsevier
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Abstract
In the present work, NiFe layered double hydroxide (LDH) supported single Ru atoms in-situ growth on BiVO₄ photoanode (BiVO₄@NiFe-LDHs/Ru) was fabricated to enhance the photoelectrochemical (PEC) water splitting. Ru atoms anchored to NiFe-LDHs via oxygen coordination to form Ru-O-M bonds, which induced electrons rearrangement to improve charge carriers separation and injection. Combining with the synergistic effect of Ru and NiFe-LDHs, BiVO₄@NiFe-LDHs/Ru achieves high photocurrent density of 4.65 mA/cm² at 1.23 V vs. RHE. Besides, Ru atoms induced formation of V⁽⁵⁻ˣ⁾⁺ to stabilize V atoms in the lattice of BiVO4, which avoided V5+ dissolution during PEC water oxidation process. Density functional theory (DFT) calculation indicates that Ru SAs anchored to BiVO₄@NiFe-LDHs decrease the reaction energy barrier of rate-limiting step (*O → *OOH), resulting in acceleration of OER process. This work provides an effective pathway to design high efficient and stable photoanodes with single atoms for feasible PEC water splitting application.
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Catalysis, Process Chemistry and Technology, General Environmental Science
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0926-3373
Language
English
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Yes
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Published
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Peer review of the complete publication
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Hybrid
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Citation
Sun, Y., Li, H., Hu, Y., Wang, J., Li, A., & Corvini, P. (2024). Single-atomic ruthenium coupling with NiFe layered double hydroxide in-situ growth on BiVO₄ photoanode for boosting photoelectrochemical water splitting. Applied Catalysis B: Environmental, 340, 123269. https://doi.org/10.1016/j.apcatb.2023.123269