Enhanced photoelectrochemical activity of bi-functional photocatalytic fuel cell by a superior heterostructure SnO2/BiOBr/MoS2 photoanode

He, Yun; Zhu, Longkai; Hu, Jue; Zhang, Yizhen; Wang, Jiaqi; Zhang, Chengxu; Li, Jianfen; Leung, Mkh; Li, Hui

doi:10.1016/j.apsusc.2023.156821

Cited by 10 publications

(3 citation statements)

References 43 publications

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“…It also reports that the incorporation of an additional metal oxide layer, such as TiO 2 , WO 3 , Nb 2 O 5 , and SnO 2 , acts as a hole-blocking layer between the absorption layer and the fluorine-doped tin oxide (FTO) substrate, which would achieve outstanding enhancement in solar cells and PEC devices. − Among them, SnO 2 is attracted great attention, owing to high electrical conductivity and chemical/thermal stability, as well as good compatibility with transparent conducting oxide substrates [FTO and In 2– x Sn x O 3 (ITO)]. More important, SnO 2 has demonstrated great advantages that enhanced PEC water oxidation activity in various photoanodes.…”

Section: Introductionmentioning

confidence: 99%

Rational Design of CoOOH/α-Fe₂O₃/SnO₂ for Boosted Photoelectrochemical Water Oxidation: The Roles of Underneath SnO₂ and Surface CoOOH

Zheng,

Wang,

Zhu

et al. 2024

Inorg. Chem.

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Hematite (α-Fe 2 O 3 ) photoanode is a promising candidate for efficient PEC solar energy conversion. However, the serious charge recombination together with the sluggish water oxidation kinetics of α-Fe 2 O 3 still restricts its practical application in renewable energy systems. In this work, a CoOOH/α-Fe 2 O 3 /SnO 2 photoanode was fabricated, in which the ultrathin SnO 2 underlayer is deposited on the fluorine-doped tin oxide (FTO) substrate, α-Fe 2 O 3 nanorod array is the absorber layer, and CoOOH nanosheet is the surface modifier, respectively. The resulting CoOOH/α-Fe 2 O 3 /SnO 2 exhibited excellent PEC water splitting with a high photocurrent density of 2.05 mA cm −2 at 1.23 V vs RHE in the alkaline electrolyte, which is ca. 3.25 times that of bare α-Fe 2 O 3 . PEC characterizations demonstrated that SnO 2 not only could block hole transport from α-Fe 2 O 3 to FTO substrate but also could efficiently enhance the light-harvesting property and reduce the surface states by controlling the growth process of α-Fe 2 O 3 , while the CoOOH overlayer as cocatalysts could rapidly extract the photogenerated holes and provide catalytic active sites for water oxidation. Benefiting from the synergistic effects of SnO 2 and CoOOH, the efficiency of the charge recombination and the overpotential for water oxidation of α-Fe 2 O 3 are obviously decreased, resulting in the boosted PEC efficiency for water oxidation. The rational design and simple fabrication strategy display great potentials to be used for other PEC systems with excellent efficiency.

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Section: Introductionmentioning

confidence: 99%

Rational Design of CoOOH/α-Fe₂O₃/SnO₂ for Boosted Photoelectrochemical Water Oxidation: The Roles of Underneath SnO₂ and Surface CoOOH

Zheng,

Wang,

Zhu

et al. 2024

Inorg. Chem.

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“…The SnO 2 /BiOBr/ MoS 2 heterostructure exhibited the maximum photocurrent density, which is higher than BiOBr/MoS 2 heterostructure and individual materials. 33 These studies motivated us to study a trilayer MoS 2 /ZnO/WS 2 heterojunction for enhanced photocatalytic activity. Hence, constructing a MoS 2 /ZnO/WS 2 trilayer heterojunction is necessary to enhance photocatalytic efficiency for overall water-splitting applications.…”

Section: ■ Introductionmentioning

confidence: 99%

“…He et al also investigated a SnO 2 /BiOBr/MoS 2 heterostructure for enhanced photoelectrochemical activity. The SnO 2 /BiOBr/MoS 2 heterostructure exhibited the maximum photocurrent density, which is higher than BiOBr/MoS 2 heterostructure and individual materials . These studies motivated us to study a trilayer MoS 2 /ZnO/WS 2 heterojunction for enhanced photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Investigation of Electronic and Photocatalytic Properties of a Trilayer vdW MoS₂/ZnO/WS₂ Heterojunction for Overall Water-Splitting Applications

Nayak,

Thangavel

2024

ACS Appl. Energy Mater.

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Construction of a van der Waals (vdW) heterojunction is a promising approach with effective separation of charge carriers for intensified solar-to-hydrogen (STH) conversion efficiency. A trilayer MoS 2 /ZnO/WS 2 heterojunction with two different configurations is constructed and their electronic and photocatalytic properties are investigated in detail. The heterojunction exhibited a type-II band alignment, where the ZnO monolayer is placed to the valence band maxima (VBM) position and MoS 2 is contributed at the conduction band minima (CBM) of the heterojunction. In addition, trilayer heterojunction showed a high electron mobility of 454.12 cm 2 V −1 s −1 and optical absorption intensity of 8.54 × 10 5 cm −1 in the visible region, which is much more significant than the individual monolayers. Interestingly, the MoS 2 /ZnO/WS 2 heterojunction exhibited the maximum STH efficiency of 16.83%, which is much higher than the MoS 2 , ZnO, and WS 2 monolayers and MoS 2 /ZnO and MoS 2 / WS 2 heterostructures. S top acts as a brilliant adsorption site for hydrogen evolution reaction (HER). The theoretical overpotential value of the oxygen evolution reaction (OER) is 1.45 eV, much smaller than that of the MoS 2 monolayer. The present study suggests that the construction of vdW vertical stacking of the trilayer heterojunction significantly enhances the photocatalytic activity with high carrier mobility, STH efficiency, and optical absorption in the visible region for overall water-splitting applications.

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Dual-loading strategy to construct Au-BiOBr-TiO2 photocatalysts for fast and efficient degradation of xanthates under visible light

Qi,

Shen,

Zhao

et al. 2023

J. Cent. South Univ.

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Enhanced photoelectrochemical activity of bi-functional photocatalytic fuel cell by a superior heterostructure SnO2/BiOBr/MoS2 photoanode

Cited by 10 publications

References 43 publications

Rational Design of CoOOH/α-Fe₂O₃/SnO₂ for Boosted Photoelectrochemical Water Oxidation: The Roles of Underneath SnO₂ and Surface CoOOH

Rational Design of CoOOH/α-Fe₂O₃/SnO₂ for Boosted Photoelectrochemical Water Oxidation: The Roles of Underneath SnO₂ and Surface CoOOH

Theoretical Investigation of Electronic and Photocatalytic Properties of a Trilayer vdW MoS₂/ZnO/WS₂ Heterojunction for Overall Water-Splitting Applications

Dual-loading strategy to construct Au-BiOBr-TiO2 photocatalysts for fast and efficient degradation of xanthates under visible light

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Enhanced photoelectrochemical activity of bi-functional photocatalytic fuel cell by a superior heterostructure SnO2/BiOBr/MoS2 photoanode

Cited by 10 publications

References 43 publications

Rational Design of CoOOH/α-Fe2O3/SnO2 for Boosted Photoelectrochemical Water Oxidation: The Roles of Underneath SnO2 and Surface CoOOH

Rational Design of CoOOH/α-Fe2O3/SnO2 for Boosted Photoelectrochemical Water Oxidation: The Roles of Underneath SnO2 and Surface CoOOH

Theoretical Investigation of Electronic and Photocatalytic Properties of a Trilayer vdW MoS2/ZnO/WS2 Heterojunction for Overall Water-Splitting Applications

Dual-loading strategy to construct Au-BiOBr-TiO2 photocatalysts for fast and efficient degradation of xanthates under visible light

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Rational Design of CoOOH/α-Fe₂O₃/SnO₂ for Boosted Photoelectrochemical Water Oxidation: The Roles of Underneath SnO₂ and Surface CoOOH

Rational Design of CoOOH/α-Fe₂O₃/SnO₂ for Boosted Photoelectrochemical Water Oxidation: The Roles of Underneath SnO₂ and Surface CoOOH

Theoretical Investigation of Electronic and Photocatalytic Properties of a Trilayer vdW MoS₂/ZnO/WS₂ Heterojunction for Overall Water-Splitting Applications