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- W4313200845 abstract "Seeking earth-abundant and high-performance cocatalysts is important and indispensable to achieve highly efficient artificial photoreduction of CO2 to solar fuels, an eco-friendly and sustainable approach to remedy environmental damage and address the energy crisis. Herein, as promising noble-metal-free candidates, six Ni species including Ni, NiO, NiS, Ni2P, Ni3C and Ni3N were deposited on TiO2 nanosheets to evaluate their cocatalytic behaviors in photocatalytic CO2 reduction reactions. It is found that Ni and NiO cannot improve the photocatalytic activity dramatically, while NiS and Ni2P substantially accelerate the side H2 evolution and drastically decrease the selectivity for CO2 reduction. Conversely, Ni3C and Ni3N significantly promote the CO2-to-CO conversion and effectively inhibit the proton reduction reaction. In particular, the best-performing TiO2-Ni3N affords a maximum CO production rate of 49.6 μmol gcat−1 h−1 and supreme selectivity of 94.1 % for CO2 reduction. The origin of the activity and selectivity difference of Ni based cocatalyst is the distinct electron trapping abilities in separation of electron-hole pairs and varied surface reactivities in adsorption and activation of CO2 molecules. Theoretical simulations also reveal that the six Ni species possess diverse thermodynamic energy barriers for CO2-to-CO conversion and side H2 generation. Results support the development of novel earth-abundant cocatalysts for solar energy conversion applications." @default.
- W4313200845 created "2023-01-06" @default.
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- W4313200845 date "2023-02-01" @default.
- W4313200845 modified "2023-10-01" @default.
- W4313200845 title "Unveiling the difference in the activity and selectivity of nickel based cocatalysts for CO2 photoreduction" @default.
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- W4313200845 doi "https://doi.org/10.1016/j.jcou.2022.102346" @default.
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