Controllable synthesized heterostructure photocatalyst Mo2C@C/2D g-C3N4: enhanced catalytic performance for hydrogen production

Song, Yanhua; Xia, Kaixiang; Gong, Yimin; Li, Li; Yi, Jianjian; She, Xiaojie; Chen, Zhigang; Wu, Jingjie; Li, Huaming; Xu, Hui

doi:10.1039/c8dt03161d

Cited by 42 publications

(26 citation statements)

References 59 publications

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“…For the composite samples, the PL intensity of ZC 40% is weak, predicting much more efficient separation of photocarriers in the ZnIn2S4-CNO samples [42]. Similar results were observed by other groups in ZnS/g-C3N4 [43], ZnFe2O4/g-C3N4 [44], and Mo2C@C/2D g-C3N4 [45] heterojunction systems.…”

Section: Photoelectrochemical Responsesupporting

confidence: 83%

Fabrication of hierarchical ZnIn2S4@CNO nanosheets for photocatalytic hydrogen production and CO2 photoreduction

Zhu

Ouyang

Zeng

et al. 2020

Chinese Journal of Catalysis

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Section: Photoelectrochemical Responsesupporting

confidence: 83%

Fabrication of hierarchical ZnIn2S4@CNO nanosheets for photocatalytic hydrogen production and CO2 photoreduction

Zhu

Ouyang

Zeng

et al. 2020

Chinese Journal of Catalysis

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“…On this basis, the Mo 2 C sample was coupled with CN to obtain the composite (MC/CN). Two evident peaks at about 13.1 and 27.5° (Figure ) correspond to the (100) and (002) planes of CN, − representing the characteristic peaks of melon species, respectively. The small peak around 39.4° in the inset belongs to Mo 2 C. The weak intensity should be due to the low content of Mo 2 C. The Fourier transform infrared spectroscopy (FTIR) result (Figure S5) supports the above speculation.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Selective H₂S Oxidation Performance on Mo₂C-Modified g-C₃N₄

Lei

Zhou

Zheng

et al. 2019

ACS Sustainable Chem. Eng.

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Direct catalytic selective oxidation of H2S to sulfur at low temperature has been drawing attention. Molybdenum carbide (Mo2C), in which the excess occupied orbitals provide more back-donation chances for the adsorbents’ π-orbitals, shows activity in electrocatalysis, photocatalysis, thermocatalysis, etc. that are comparable to those of noble metals. This work reports for the time the use of Mo2C and Mo2C-modified g-C3N4 for catalytic selective oxidative desulfurization. The density functional theory calculation indicates that Mo2C facilitates the adsorption of H2S molecule and the HS group. Furthermore, the Mo2C-modified g-C3N4 shows a sulfur yield of as high as 99.0% at 190 °C, much higher than that of g-C3N4 (46.0%). The good stability of the catalyst was demonstrated by X-ray diffraction, Fourier transform infrared spectra, and so on. Remarkably, the H2S conversion of the Mo2C-modified g-C3N4 remains constant (95.0%) at 190 °C for as long as 30 h. As a first demonstration using carbides in selective H2S oxidation, this work provides an opportunity to develop a novel class of potential catalysts.

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“…•− and • OH for the TiO 2 /rGO-Mo 2 C also demonstrate that the rGO-Mo 2 C can act as a cocatalyst to efficiently improve the separation rate of photogenerated electrons and holes in the TiO 2 photocatalyst (Figures S6 and S7). 37,68 Therefore, based on the above analyses, the rGO-Mo 2 C nanoparticles can not only accelerate the electron transfer but also provide numerous active sites to facilitate interfacial hydrogen generation, which is accounted for the greatly promoted photocatalytic hydrogen-generation performance of TiO 2 .…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

In Situ Synthesis of Mo₂C Nanoparticles on Graphene Nanosheets for Enhanced Photocatalytic H₂-Production Activity of TiO₂

Liu

Wang

Fan

et al. 2021

ACS Sustainable Chem. Eng.

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Molybdenum carbide (Mo 2 C) has been proven to be the most promising candidate for the H 2 -evolution cocatalyst due to the similar H +adsorption ability to Pt. However, owing to its limited electrical conductivity, the Mo 2 C-modified photocatalysts usually exhibit a low H 2 -evolution performance. Considering the perfect electron mobility of graphene nanosheets, in this article, Mo 2 C nanoparticles (ca. 5 nm) were in-situ and evenly grown on the reduced graphene oxide (rGO) to prepare the graphenemodified Mo 2 C (rGO-Mo 2 C) nanoparticles to improve the photocatalytic hydrogen-generation rate of TiO 2 . Herein, the rGO-Mo 2 C is obtained by the direct calcination of graphene oxide (GO) as the carbon source and (NH 4 ) 6 Mo 7 O 24 at 800 °C, which is further coupled with the TiO 2 to synthesize the efficient TiO 2 /rGO-Mo 2 C photocatalyst. The greatest hydrogen-generation activity of TiO 2 /rGO-Mo 2 C achieved 880 μmol h −1 g −1 (AQE = 2.64%), which was 5.5 and 88 times higher than that of TiO 2 /rGO and TiO 2 , respectively. The boosted performance of TiO 2 /rGO-Mo 2 C can be attributed to the synergetic action that the rGO nanosheets can act as electron media to promote the photoelectron transfer, and the Mo 2 C nanoparticles can serve as active centers to improve the interfacial hydrogen-generation reaction. This work can provide a new synthesis strategy for the design of efficient cocatalysts for potential applications.

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Controllable synthesized heterostructure photocatalyst Mo₂C@C/2D g-C₃N₄: enhanced catalytic performance for hydrogen production

Abstract: Electrons can be trapped and exported to participate in HER reaction by Mo2C@C co-catalyst effectively.

Cited by 42 publications

References 59 publications

Fabrication of hierarchical ZnIn2S4@CNO nanosheets for photocatalytic hydrogen production and CO2 photoreduction

Fabrication of hierarchical ZnIn2S4@CNO nanosheets for photocatalytic hydrogen production and CO2 photoreduction

Enhanced Selective H₂S Oxidation Performance on Mo₂C-Modified g-C₃N₄

In Situ Synthesis of Mo₂C Nanoparticles on Graphene Nanosheets for Enhanced Photocatalytic H₂-Production Activity of TiO₂

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Controllable synthesized heterostructure photocatalyst Mo2C@C/2D g-C3N4: enhanced catalytic performance for hydrogen production

Abstract: Electrons can be trapped and exported to participate in HER reaction by Mo2C@C co-catalyst effectively.

Cited by 42 publications

References 59 publications

Fabrication of hierarchical ZnIn2S4@CNO nanosheets for photocatalytic hydrogen production and CO2 photoreduction

Fabrication of hierarchical ZnIn2S4@CNO nanosheets for photocatalytic hydrogen production and CO2 photoreduction

Enhanced Selective H2S Oxidation Performance on Mo2C-Modified g-C3N4

In Situ Synthesis of Mo2C Nanoparticles on Graphene Nanosheets for Enhanced Photocatalytic H2-Production Activity of TiO2

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Controllable synthesized heterostructure photocatalyst Mo₂C@C/2D g-C₃N₄: enhanced catalytic performance for hydrogen production

Enhanced Selective H₂S Oxidation Performance on Mo₂C-Modified g-C₃N₄

In Situ Synthesis of Mo₂C Nanoparticles on Graphene Nanosheets for Enhanced Photocatalytic H₂-Production Activity of TiO₂