Performance enhancement of α-Fe2O3@Bi2S3 heterojunction for photocathodic protection of 304SS

Cai, Jiajia; Kong, Lingna; Tang, Xiangxuan; Wang, Jianmin; Xie, Zhihong; Wang, Xianxuan; Xie, Qian; Xu, Qiyan

doi:10.1016/j.surfcoat.2022.128376

Cited by 9 publications

(2 citation statements)

References 24 publications

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“…It was worth noting that the CoPi/Mg–Fe 2 O 3 had the strongest absorption capacity for photons of the same wavelength, followed by Mg–Fe 2 O 3 and α-Fe 2 O 3 . Their band-gap energies were calculated by plotting the Tauc plots according to eq . ( α h v ) 1 / n = A false( h v − E normalg false) where α is the absorption coefficient, hv is the incident photon energy, A is a constant, and the value of n is taken as 2 for α-Fe 2 O 3 with indirect band-gap . As shown in Figure S6b, the band-gap energies were 2.10, 2.08, and 2.07 eV for α-Fe 2 O 3 , Mg–Fe 2 O 3 , and CoPi/Mg–Fe 2 O 3 , respectively.…”

Section: Resultsmentioning

confidence: 99%

“…where α is the absorption coefficient, hv is the incident photon energy, A is a constant, and the value of n is taken as 2 for α-Fe 2 O 3 with indirect band-gap. 37 As shown in Figure S6b, the band-gap energies were 2.10, 2.08, and 2.07 eV for α-Fe 38,39 The linear portion of the depletion layer in the M-S curve was fitted to a straight line, and then the donor concentration (N d ) and flat-band potential (V fb ) of the photoanodes were obtained from the slope and intercept of the straight line by eq 8.…”

Section: Kinetic Characterization Of Charge Transfermentioning

confidence: 99%

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Mg-Doped Hematite Nanoparticle Arrays Coated with CoPi Thin Films for Solar Water Oxidation

Yuan

Deng

et al. 2023

ACS Appl. Nano Mater.

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As a promising candidate for photoelectrochemical water decomposition, α-Fe 2 O 3 has been plagued by low actual quantum efficiency and weak stability. In this work, we prepared an α-Fe 2 O 3 photoanode with Mg doping and cobalt-hydroxylphosphate (CoPi) coating. Compared to α-Fe 2 O 3 , the CoPi/Mg−Fe 2 O 3 photoanode exhibited remarkably enhanced activity of photoelectrochemical water splitting. The photocurrent density of the CoPi/Mg−Fe 2 O 3 photoanode was 1.30 mA cm −2 at 1.23 V vs RHE, which was around 3.51 times higher than that of α-Fe 2 O 3 (0.39 mA cm −2 ). In addition, the CoPi/Mg−Fe 2 O 3 photoanode demonstrated good stability, and the photocurrent density produced by the CoPi/Mg−Fe 2 O 3 photoanode did not decrease significantly after 24 h of light irradiation. The efficiencies of bulk charge separation and surface charge injection of the CoPi/Mg− Fe 2 O 3 photoanode were greatly increased through Mg doping and CoPi coating, which significantly improved its performances of photochemical water splitting.

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