In2S3/F-Fe2O3 type-II heterojunction bonded by interfacial S-O for enhanced charge separation and transport in photoelectrochemical water oxidation

Chai, Huan; Gao, Lili; Wang, Peng; Li, Feng; Hu, Guowen; Jin, Jun

doi:10.1016/j.apcatb.2021.121011

Cited by 97 publications

(66 citation statements)

References 53 publications

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“…And all binding energies obtained from XPS tests were corrected for the C 1 s line at 284.6 eV. The Fe 2p XPS spectra (Figure 2a) of all samples show similar Fe 2p 3/2 and Fe 2p 1/2 peaks at around 710.8 and 724.5 eV, respectively, which correspond to Fe 3+ in iron oxide [5a] . In addition, the Fe 2p 3/2 and Fe 2p 1/2 peaks are accompanied by a satellite peak, respectively.…”

Section: Resultsmentioning

confidence: 99%

Revealing the Essential Role of Iron Phosphide and its Surface‐Evolved Species in the Photoelectrochemical Water Oxidation by Gd‐Doped Hematite Photoanode

2022

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Phosphates are easily derived from transition metal phosphides under natural conditions, and the real roles of these two in catalytic reactions are not yet clear. Here, a multiphase FeP/Gd−Fe2O3 shell‐core structure photoanode was constructed and explored regarding the real role of FeP and its surface‐reconstructed iron phosphate (Fe−Pi) in photoelectrochemical water oxidation. The FeP/Gd−Fe2O3 photoanode exhibited an excellent photocurrent density of 2.56 mA cm−2 at 1.23 V versus the reversible hydrogen electrode, up to 4 times greater than those of the pristine α‐Fe2O3 (0.64 mA cm−2). Detailed studies showed that FeP could act as a photosensitizer to enhance light absorption and as a conductive layer to accelerate charge transfer. The FeP significantly enhanced the incident photon‐to‐current conversion efficiency of the photoanode and improved the electron transition within the photoanode. Naturally evolved Fe−Pi on the surface provided more active sites for water oxidation. They effectively passivated the surface capture state and synergistically inhibited the electron–hole recombination. Moreover, the in‐situ constructed multiphase catalyst had a smaller interfacial contact resistance than the intentionally decorative cocatalyst. This work provides new insight into the understanding of the essential role of transition metal phosphides and their surface‐reconstructed species in catalytic reactions.

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Section: Resultsmentioning

confidence: 99%

Revealing the Essential Role of Iron Phosphide and its Surface‐Evolved Species in the Photoelectrochemical Water Oxidation by Gd‐Doped Hematite Photoanode

2022

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“…S19†). 69 The Φ is equal to the difference between the vacuum energy level and the Femi level ( E F ). Therefore, the E F values of PSO and NiFeLDH are −4.35 and −4.55 eV, respectively.…”

Section: Resultsmentioning

confidence: 99%

Enhanced visible light photocatalytic hydrogen production over poly(dibenzothiophene-S,S-dioxide)-based heterostructures decorated by Earth-abundant layered double hydroxides

Luo

Liu

et al. 2022

Dalton Trans.

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“…[89][90][91] As most heterojunctions cannot be formed at the same time, the preparation methods are mostly in a stepwise manner, that is, a semiconductor is first grown on a conductive substrate, and then another semiconductor is prepared. [92][93][94][95] For example, Gao et al [96] grew TiO 2 nanorods on fluorine-doped tin oxide (FTO) via a hydrothermal method, and the obtained samples were subjected to secondary hydrothermal treatment and then grew TiO 2 ultrathin nanosheets in situ on TiO 2 nanorods. The construction of this facet heterostructure promoted the efficiency of charge separation, prolonged the life of carriers, and was conducive to improving the performance of hydrogen production.…”

Section: Type-ii Heterojunctionsmentioning

confidence: 99%

Recent Progress on Semiconductor Heterojunction‐Based Photoanodes for Photoelectrochemical Water Splitting

Meng

et al. 2022

Small Science

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For photoelectrochemical (PEC) water splitting, the utilization of semiconductor heterojunctions as building blocks for photoanodes allows for high light absorption, effective charge separation, and superior redox capability, greatly boosting the solar energy conversion efficiency. This review mainly focuses on the construction of heterojunction photoanodes, improvement strategies of carrier transmission, and their application in PEC water splitting. First, a series of carrier dynamics characterization methods are introduced to reveal the principle and significance of promoting carrier transport in heterojunctions. Then, from the perspective of the mechanism of promoting the separation and transport of charge carriers, several strategies are summarized and analyzed, including the micro/nanostructure, energy band structure, photothermal effect, piezoelectric effect, pyroelectric effect, ferroelectric effect, and intermediate layer. Finally, the challenges and opportunities for heterojunction photoanodes in PEC reactions are explained clearly, which points the way forward for the development of heterojunctions.

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In2S3/F-Fe2O3 type-II heterojunction bonded by interfacial S-O for enhanced charge separation and transport in photoelectrochemical water oxidation

Cited by 97 publications

References 53 publications

Revealing the Essential Role of Iron Phosphide and its Surface‐Evolved Species in the Photoelectrochemical Water Oxidation by Gd‐Doped Hematite Photoanode

Revealing the Essential Role of Iron Phosphide and its Surface‐Evolved Species in the Photoelectrochemical Water Oxidation by Gd‐Doped Hematite Photoanode

Enhanced visible light photocatalytic hydrogen production over poly(dibenzothiophene-S,S-dioxide)-based heterostructures decorated by Earth-abundant layered double hydroxides

Recent Progress on Semiconductor Heterojunction‐Based Photoanodes for Photoelectrochemical Water Splitting

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