In-situ growth of high-content 1T phase MoS2 confined in the CuS nanoframe for efficient photocatalytic hydrogen evolution

Xu, Xin; Song, Yaru; Guo, Shaohui; Zhang, Youzi; Wang, Bilin; Yu, Jinjiang; Li, Tongtong

doi:10.1016/j.apcatb.2020.118773

Cited by 114 publications

(35 citation statements)

References 93 publications

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“…Figure 1b−e shows the top-view scanning electron microscopy (SEM) images of the TiO 2 , ZnI 2 −TiO 2 , ZnBr 2 −TiO 2 , and ZnCl 2 −TiO 2 films, respectively. We find that zinc halide 27,28 The total XPS spectra of zinc halide−TiO 2 films indicate the existence of zinc halides on the TiO 2 surface (Figure S2, Supporting Information). The high-resolution XPS spectra of Ti and O from TiO 2 films are shown in Figure 2a,b.…”

Section: Resultsmentioning

confidence: 95%

Synergistic Effect through the Introduction of Inorganic Zinc Halides at the Interface of TiO₂ and Sb₂S₃ for High-Performance Sb₂S₃ Planar Thin-Film Solar Cells

Han

Zhou

et al. 2020

ACS Appl. Mater. Interfaces

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The competition between charge recombination and extraction principally affects the fill factor (FF) and power conversion efficiency (PCE) of planar thin-film solar cells. In Sb 2 S 3 thin-film solar cells, the electrocharge recombination and extraction n transport layer (ETL) plays a significant role in electron extraction and determination of Sb 2 S 3 film absorber quality. Herein, a TiO 2 ETL is strategically modified using an inorganic salt zinc halide (i.e., ZnCl 2 , ZnBr 2 , ZnI 2 ), which simultaneously improves the electronic properties of TiO 2 and promotes the growth of Sb 2 S 3 films with larger grain size and higher crystallinity. The experimental results and theoretical calculations further reveal that the zinc halide can interact with TiO 2 and simultaneously bond strongly with the upper Sb 2 S 3 film, which creates a unique pathway for electron transfer, passivates the trap states, and alleviates the recombination losses effectively. As a result, an average PCE of 6.87 ± 0.11% and the highest PCE of 7.08% have been attained with an improved FF from 51.22 to 61.61% after ZnCl 2 introduction. Additionally, introduction of ZnCl 2 helps the unencapsulated devices to maintain 93% of their original performance after 2400 h of storage in a nitrogen-filled glovebox. This work develops an effective route for the optimization of ETLs and defect healing using simple and low-cost inorganic salts.

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Section: Resultsmentioning

confidence: 95%

Synergistic Effect through the Introduction of Inorganic Zinc Halides at the Interface of TiO₂ and Sb₂S₃ for High-Performance Sb₂S₃ Planar Thin-Film Solar Cells

Han

Zhou

et al. 2020

ACS Appl. Mater. Interfaces

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“…It is noted that no photocatalytic oxygen gas was produced because of the energy band positions of the CuS–MoS 2 photocatalyst (Supplementary Fig. 29 ) 42 . It is speculated that the photo-induced holes react with some S ions from CuS/MoS 2 catalyst as shown based on the XPS results (Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

Boosting photocatalytic hydrogen production from water by photothermally induced biphase systems

et al. 2021

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Solar-driven hydrogen production from water using particulate photocatalysts is considered the most economical and effective approach to produce hydrogen fuel with little environmental concern. However, the efficiency of hydrogen production from water in particulate photocatalysis systems is still low. Here, we propose an efficient biphase photocatalytic system composed of integrated photothermal–photocatalytic materials that use charred wood substrates to convert liquid water to water steam, simultaneously splitting hydrogen under light illumination without additional energy. The photothermal–photocatalytic system exhibits biphase interfaces of photothermally-generated steam/photocatalyst/hydrogen, which significantly reduce the interface barrier and drastically lower the transport resistance of the hydrogen gas by nearly two orders of magnitude. In this work, an impressive hydrogen production rate up to 220.74 μmol h−1 cm−2 in the particulate photocatalytic systems has been achieved based on the wood/CoO system, demonstrating that the photothermal–photocatalytic biphase system is cost-effective and greatly advantageous for practical applications.

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“…The heterostructures show improved catalytic activities compared to single-phase counterpart because of synergistic effect of different components, and the much exposed active sites on interfaces. [22] Moreover, the interaction between different components can cause redistribution of electrons on heterogenous interface to facilitate a moderate adsorption-free energy for H proton, which leads to a boosted HER performance of composites. [21,23] The CoS 2 with cubic structure is proved as an attractive electrocatalyst of water splitting due to high catalytic activity and outstanding electrochemical stability toward HER.…”

Section: Introductionmentioning

confidence: 99%

CoS₂ Nanoparticles‐Decorated MoS₂/rGO Nanosheets as An Efficient Electrocatalyst for Ultrafast Hydrogen Evolution

Khan

Shah

Ullah

et al. 2021

Adv Materials Inter

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Water electro‐reduction for sustainable hydrogen production is a critical factor of water‐splitting devices. However, designing and engineering cheap and highly‐efficient alternative electrocatalysts to replace currently used platinum‐based electrocatalysts is still prerequisite for commercialization of hydrogen production. Herein, a robust and highly active catalyst of CoS2 nanoparticle‐decorated MoS2/reduced graphene oxide (CoS2@MoS2/rGO−w) nanosheets is fabricated by hydrothermal reaction for hydrogen evolution reaction (HER). The optimized CoS2@MoS2/rGO−0.05 nanocomposite exhibits outstanding HER performance with a low onset overpotential of 15 mV, overpotentials of 66 mV at current density 10 mA cm−2, a small Tafel slope of 33.9 mV dec−1, and high electrochemical durability in 0.5 m H2SO4 solution. The high HER of CoS2@MoS2/rGO−0.05 can be mostly ascribed to synergistic effect between CoS2 and MoS2. This work offers a novel strategy for design and engineering efficient electrocatalysts for the HER based on earth‐abundant materials.

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In-situ growth of high-content 1T phase MoS2 confined in the CuS nanoframe for efficient photocatalytic hydrogen evolution

Cited by 114 publications

References 93 publications

Synergistic Effect through the Introduction of Inorganic Zinc Halides at the Interface of TiO₂ and Sb₂S₃ for High-Performance Sb₂S₃ Planar Thin-Film Solar Cells

Synergistic Effect through the Introduction of Inorganic Zinc Halides at the Interface of TiO₂ and Sb₂S₃ for High-Performance Sb₂S₃ Planar Thin-Film Solar Cells

Boosting photocatalytic hydrogen production from water by photothermally induced biphase systems

CoS₂ Nanoparticles‐Decorated MoS₂/rGO Nanosheets as An Efficient Electrocatalyst for Ultrafast Hydrogen Evolution

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In-situ growth of high-content 1T phase MoS2 confined in the CuS nanoframe for efficient photocatalytic hydrogen evolution

Cited by 114 publications

References 93 publications

Synergistic Effect through the Introduction of Inorganic Zinc Halides at the Interface of TiO2 and Sb2S3 for High-Performance Sb2S3 Planar Thin-Film Solar Cells

Synergistic Effect through the Introduction of Inorganic Zinc Halides at the Interface of TiO2 and Sb2S3 for High-Performance Sb2S3 Planar Thin-Film Solar Cells

Boosting photocatalytic hydrogen production from water by photothermally induced biphase systems

CoS2 Nanoparticles‐Decorated MoS2/rGO Nanosheets as An Efficient Electrocatalyst for Ultrafast Hydrogen Evolution

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Product

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Synergistic Effect through the Introduction of Inorganic Zinc Halides at the Interface of TiO₂ and Sb₂S₃ for High-Performance Sb₂S₃ Planar Thin-Film Solar Cells

Synergistic Effect through the Introduction of Inorganic Zinc Halides at the Interface of TiO₂ and Sb₂S₃ for High-Performance Sb₂S₃ Planar Thin-Film Solar Cells

CoS₂ Nanoparticles‐Decorated MoS₂/rGO Nanosheets as An Efficient Electrocatalyst for Ultrafast Hydrogen Evolution