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- W4309774525 abstract "Bismuth ferrite (BiFeO3) holds great potentials in the photoelectrocatalysis due to the advantages of low cost, narrow band gap and good chemical stability. However, the photoelectrochemical performance of BiFeO3 is usually inhibited by the poor charge carrier transport. Here, we report the flame annealing synthesized Sm3+ doped BiFeO3 photocathodes for efficient hydrogen production. Greatly enhanced water reduction activity was found in doped samples. The Bi0.95Sm0.05FeO3 composition exhibited largest photocurrent density of 0.1061 mA cm−2 at 0 V vs. RHE in 0.5 M Na2SO4, which was 5.6 times higher than that of the pristine BiFeO3. Mott-Schottky analysis and electrochemical impedance spectra proved that the Bi3+substitution increased the charge carrier concentration and facilitated the charge migration. Incident photon-to-electron conversion efficiency (IPCE) value for Bi0.95Sm0.05FeO3 film (∼6.39% at 325 nm) was approximately ten times higher than that of undoped sample. The high performance can be ascribed to the rational Sm3+ doping, which can improve visible light absorption ability, facilitate the charge carrier transport kinetics and hinder the recombination of photogenerated carriers. Our work provides a facile cation doping with rare earth ions to improve the photoelectrochemical performances." @default.
- W4309774525 created "2022-11-29" @default.
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- W4309774525 date "2023-04-01" @default.
- W4309774525 modified "2023-09-30" @default.
- W4309774525 title "Enhancement of photoelectrochemical performance of BiFeO3 by Sm3+ doping" @default.
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- W4309774525 doi "https://doi.org/10.1016/j.ceramint.2022.11.205" @default.
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