Performance and Mechanism of Photoelectrocatalytic Activity of MoSx/WO3 Heterostructures Obtained by Reactive Pulsed Laser Deposition for Water Splitting.
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| Title: | Performance and Mechanism of Photoelectrocatalytic Activity of MoSx/WO3 Heterostructures Obtained by Reactive Pulsed Laser Deposition for Water Splitting. |
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| Authors: | Fominski, Vyacheslav1 (AUTHOR) limpo2003@mail.ru, Romanov, Roman1 (AUTHOR) dmitryfominski@gmail.com, Fominski, Dmitry1 (AUTHOR) ale7@inbox.lv, Soloviev, Alexey1 (AUTHOR) oxygenofunt@gmail.com, Rubinkovskaya, Oxana1 (AUTHOR), Demin, Maxim2 (AUTHOR) mdemin@kantiana.ru, Maksimova, Ksenia2 (AUTHOR) xmaksimova@gmail.com, Shvets, Pavel2 (AUTHOR) pshvets@kantiana.ru, Goikhman, Aleksandr2 (AUTHOR) aygoikhman@gmail.com |
| Source: | Nanomaterials (2079-4991). May2020, Vol. 10 Issue 5, p871. 1p. |
| Subjects: | Photoelectrochemical cells, Pulsed laser deposition, Heterostructures, Pulsed lasers, Hydrogen evolution reactions, Oxygen evolution reactions, Laser ablation |
| Abstract: | This work studies the factors that affect the efficiency of the photoelectrochemical hydrogen evolution reaction (HER) using MoSx/WO3 nano-heterostructures obtained by reactive pulsed laser deposition (RPLD) on glass substrates covered with fluorinated tin oxide (FTO). Another focus of the research is the potential of MoSx nanofilms as a precursor for MoOz(S) nanofilms, which enhance the efficiency of the photo-activated oxygen evolution reaction (OER) using the MoOz(S)/WO3/FTO heterostructures. The nanocrystalline WO3 film was created by laser ablation of a W target in dry air at a substrate temperature of 420 °C. Amorphous MoSx nanofilms (2 ≤ x ≤ 12) were obtained by laser ablation of an Mo target in H2S gas of varied pressure at room temperature of the substrate. Studies of the energy band structures showed that for all MoSx/WO3/FTO samples, photo-activated HER in an acid solution proceeded through the Z-scheme. The highest photoelectrochemical HER efficiency (a photocurrent density ~1 mA/cm2 at a potential of ~0 V under Xe lamp illumination (~100 mW/cm2)) was found for porous MoS4.5 films containing the highest concentration of catalytically active sites attributed to S ligands. During the anodic posttreatment of porous MoSx nanofilms, MoOz(S) films with a narrow energy band gap were formed. The highest OER efficiency (a photocurrent density ~5.3 mA/cm2 at 1.6 V) was detected for MoOz(S)/WO3/FTO photoanodes that were prepared by posttreatment of the MoSx~3.2 precursor. The MoOz(S) film contributed to the effective photogeneration of electron–hole pairs that was followed by the transport of photoelectrons from MoOz(S) into the WO3 film and the effective participation of holes possessing strong oxidation ability in the OER on the surface of the MoOz(S) film. [ABSTRACT FROM AUTHOR] |
| Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 143674773 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Performance and Mechanism of Photoelectrocatalytic Activity of MoSx/WO3 Heterostructures Obtained by Reactive Pulsed Laser Deposition for Water Splitting. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Fominski%2C+Vyacheslav%22">Fominski, Vyacheslav</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> limpo2003@mail.ru</i><br /><searchLink fieldCode="AR" term="%22Romanov%2C+Roman%22">Romanov, Roman</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> dmitryfominski@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Fominski%2C+Dmitry%22">Fominski, Dmitry</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> ale7@inbox.lv</i><br /><searchLink fieldCode="AR" term="%22Soloviev%2C+Alexey%22">Soloviev, Alexey</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> oxygenofunt@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Rubinkovskaya%2C+Oxana%22">Rubinkovskaya, Oxana</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Demin%2C+Maxim%22">Demin, Maxim</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> mdemin@kantiana.ru</i><br /><searchLink fieldCode="AR" term="%22Maksimova%2C+Ksenia%22">Maksimova, Ksenia</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> xmaksimova@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Shvets%2C+Pavel%22">Shvets, Pavel</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> pshvets@kantiana.ru</i><br /><searchLink fieldCode="AR" term="%22Goikhman%2C+Aleksandr%22">Goikhman, Aleksandr</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> aygoikhman@gmail.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. May2020, Vol. 10 Issue 5, p871. 1p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Photoelectrochemical+cells%22">Photoelectrochemical cells</searchLink><br /><searchLink fieldCode="DE" term="%22Pulsed+laser+deposition%22">Pulsed laser deposition</searchLink><br /><searchLink fieldCode="DE" term="%22Heterostructures%22">Heterostructures</searchLink><br /><searchLink fieldCode="DE" term="%22Pulsed+lasers%22">Pulsed lasers</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen+evolution+reactions%22">Hydrogen evolution reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen+evolution+reactions%22">Oxygen evolution reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Laser+ablation%22">Laser ablation</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This work studies the factors that affect the efficiency of the photoelectrochemical hydrogen evolution reaction (HER) using MoSx/WO3 nano-heterostructures obtained by reactive pulsed laser deposition (RPLD) on glass substrates covered with fluorinated tin oxide (FTO). Another focus of the research is the potential of MoSx nanofilms as a precursor for MoOz(S) nanofilms, which enhance the efficiency of the photo-activated oxygen evolution reaction (OER) using the MoOz(S)/WO3/FTO heterostructures. The nanocrystalline WO3 film was created by laser ablation of a W target in dry air at a substrate temperature of 420 °C. Amorphous MoSx nanofilms (2 ≤ x ≤ 12) were obtained by laser ablation of an Mo target in H2S gas of varied pressure at room temperature of the substrate. Studies of the energy band structures showed that for all MoSx/WO3/FTO samples, photo-activated HER in an acid solution proceeded through the Z-scheme. The highest photoelectrochemical HER efficiency (a photocurrent density ~1 mA/cm2 at a potential of ~0 V under Xe lamp illumination (~100 mW/cm2)) was found for porous MoS4.5 films containing the highest concentration of catalytically active sites attributed to S ligands. During the anodic posttreatment of porous MoSx nanofilms, MoOz(S) films with a narrow energy band gap were formed. The highest OER efficiency (a photocurrent density ~5.3 mA/cm2 at 1.6 V) was detected for MoOz(S)/WO3/FTO photoanodes that were prepared by posttreatment of the MoSx~3.2 precursor. The MoOz(S) film contributed to the effective photogeneration of electron–hole pairs that was followed by the transport of photoelectrons from MoOz(S) into the WO3 film and the effective participation of holes possessing strong oxidation ability in the OER on the surface of the MoOz(S) film. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/nano10050871 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: 871 Subjects: – SubjectFull: Photoelectrochemical cells Type: general – SubjectFull: Pulsed laser deposition Type: general – SubjectFull: Heterostructures Type: general – SubjectFull: Pulsed lasers Type: general – SubjectFull: Hydrogen evolution reactions Type: general – SubjectFull: Oxygen evolution reactions Type: general – SubjectFull: Laser ablation Type: general Titles: – TitleFull: Performance and Mechanism of Photoelectrocatalytic Activity of MoSx/WO3 Heterostructures Obtained by Reactive Pulsed Laser Deposition for Water Splitting. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Fominski, Vyacheslav – PersonEntity: Name: NameFull: Romanov, Roman – PersonEntity: Name: NameFull: Fominski, Dmitry – PersonEntity: Name: NameFull: Soloviev, Alexey – PersonEntity: Name: NameFull: Rubinkovskaya, Oxana – PersonEntity: Name: NameFull: Demin, Maxim – PersonEntity: Name: NameFull: Maksimova, Ksenia – PersonEntity: Name: NameFull: Shvets, Pavel – PersonEntity: Name: NameFull: Goikhman, Aleksandr IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2020 Type: published Y: 2020 Identifiers: – Type: issn-print Value: 20794991 Numbering: – Type: volume Value: 10 – Type: issue Value: 5 Titles: – TitleFull: Nanomaterials (2079-4991) Type: main |
| ResultId | 1 |
