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- W4386457127 abstract "Hydrogen has tremendous potential as a sustainable energy source for the future. Unassisted photoelectrochemical water splitting is a promising approach to producing hydrogen fuel from sunlight and water. To economically produce hydrogen, efficient, low-cost, environmentally friendly, and long-term stable photocathodes and photoanodes are needed. In this study, we have fabricated CuBi2O4 (CBO) photocathodes using drop-casting, hydrothermal, and electrodeposition methods. The resulting photocathodes have nanoparticle, nanosphere, and flake-like structures. The drop-casted CBO (D-CBO) exhibits an impressive onset potential of 0.9 V with a photocurrent density of −3.0 mA·cm–2 at 0 V vs reversible hydrogen electrode (RHE) and a solar to hydrogen (STH) efficiency of 0.61% at 0.23 V vs RHE, which is higher than hydrothermal CBO (H-CBO) and electrodeposited CBO (E-CBO). The high onset potential of the D-CBO photocathode results in a good unbiased operating photocurrent of −1.8 mA·cm–2, which is assisted by the BiVO4 (BVO) photoanode. The BVO photoanode has a photocurrent density of 1.6 mA·cm–2 at 1.23 V vs RHE. This study demonstrates hydrogen production from a BVO-CBO tandem cell and highlights the importance of photovoltage in tandem devices for overall water splitting, particularly in devices with CBO photocathodes." @default.
- W4386457127 created "2023-09-06" @default.
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- W4386457127 date "2023-09-05" @default.
- W4386457127 modified "2023-09-28" @default.
- W4386457127 title "Exploring CuBi<sub>2</sub>O<sub>4</sub> as a Promising Photocathode Material for PEC Water Splitting" @default.
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- W4386457127 doi "https://doi.org/10.1021/acs.energyfuels.3c00731" @default.
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