Construction strategy of Mo-S@Mo-P heterojunction formed with in-situ phosphating Mo-S nanospheres toward efficient photocatalytic hydrogen production

Zhang, Lijun; Hao, Xuqiang; Wang, Qianqian; Jin, Zhiliang; Ma, Qingxiang

doi:10.1016/j.cej.2019.123545

Cited by 76 publications

(52 citation statements)

References 76 publications

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“…The Mott-Schottky curve is used to further explore the separation and migration mechanism of photo-generated charges between the two samples. [44] The positions of the conduction band (E CB ) and valence band (E VB ) of the sample were determined and calculated respectively. Figure 9(a, b) shows the Mot-Schottky curves of CdS and CoS X /NiCo-LDH.…”

Section: Mott-schottky Analysismentioning

confidence: 99%

CdS Reinforced with CoS_X/NiCo‐LDH Core‐shell Co‐catalyst Demonstrate High Photocatalytic Hydrogen Evolution and Durability in Anhydrous Ethanol

Quan

Wang

et al. 2021

Chemistry A European J

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At present, inefficient charge separation of single photocatalyst impedes the development of photocatalytic hydrogen evolution. In this work, the CoS X /NiCo-LDH coreshell co-catalyst was cleverly designed, which exhibit high activity and high stability of hydrogen evolution in anhydrous ethanol system when coupled with CdS. Under visible light (λ � 420 nm) irradiation, the 3 %Co/NiCo/CdS composite photocatalyst exhibits a surprisingly high photocatalytic hydrogen evolution rate of 20.67 mmol g À 1 h À 1 , which is 59 times than that of the original CdS. Continuous light for 20 h still showed good cycle stability. In addition, the 3 %Co/NiCo/CdS composite catalyst also shows good hydrogen evolution performance under the Na 2 S/Na 2 SO 3 and lactic acid system. The fluorescence (PL), ultraviolet-visible diffuse reflectance (UV-vis) and photoelectrochemical tests show that the coupling of CdS and CoS X /NiCo-LDH not only accelerates the effective transfer of charges, but also greatly increases the absorption range of CdS to visible light. Therefore, the hydrogen evolution activity of the composite photocatalyst has been significantly improved. This work will provide new insights for the construction of new co-catalysts and the development of composite catalysts for hydrogen evolution in multiple systems.

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Section: Mott-schottky Analysismentioning

confidence: 99%

CdS Reinforced with CoS_X/NiCo‐LDH Core‐shell Co‐catalyst Demonstrate High Photocatalytic Hydrogen Evolution and Durability in Anhydrous Ethanol

Quan

Wang

et al. 2021

Chemistry A European J

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“…Materials with a great specific surface area had abundant reaction sites and stronger light trapping ability. The N 2 adsorption-desorption isotherm and pore size distribution of Co 9 S 8 , MCS and 10%Co 9 S 8 -MCS were tested by Brunauer-Emmett-Teller surface area (S BET ) and Barrett Joyner Halenda (BJH) at 77 K. The isotherm formula (1) 54 was as follows:…”

Section: Bet Analysismentioning

confidence: 99%

Mn _0. ₀₅ Cd ₀ _. ₉₅ S decorated MOF ‐derived Co ₉ S ₈ hollow polyhedron for efficient photocatalytic hydrogen evolu

Liu

et al. 2021

Int J Energy Res

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The photocatalytic hydrogen evolution reaction is one of the important ways to convert solar energy into renewable hydrogen. In this work, the Co 9 S 8 hollow polyhedron was formed after sulfidation and calcination with the metalorganic framework ZIF-67. The hollow polyhedron Co 9 S 8 provides abundant support sites for Mn 0.05 Cd 0.95 S and effectively reduces the agglomeration degree of Mn 0.05 Cd 0.95 S. The Co 9 S 8 hollow polyhedron as the reaction site has a large specific surface area and a mesoporous structure, which is beneficial to the progress of the photocatalytic reaction. A series of tests showed that the introduction of Co 9 S 8 hollow polyhedron significantly improved the lighttrapping ability and exposed more reaction sites. Co 9 S 8 hollow polyhedrons are used as electron capture sites, which can effectively collect electrons and induce the interface charge transfer of Mn 0.05 Cd 0.95 S to Co 9 S 8 . Because the Co 9 S 8 -Mn 0.05 Cd 0.95 S composite catalyst had a strong light-trapping ability, abundant reaction sites and Co 9 S 8 -Mn 0.05 Cd 0.95 S heterojunction accelerate the separation and transfer of charges. Therefore, the hydrogen evolution rate of the 10%Co 9 S 8 -Mn 0.05 Cd 0.95 S composite catalyst was relatively high, which was 13.369 mmol g −1 h −1 . In addition, the 10%Co 9 S 8 -Mn 0.05 Cd 0.95 S composite catalyst still has good hydrogen evolution stability after four cycles. This research may supply a new idea for the preparation of high-efficiency photocatalysts with hollow structures.Novelty Statement: The Co 9 S 8 hollow polyhedron provides abundant support sites for M 0.05 C 0.95 S particles, which effectively reduces the degree of agglomeration. The Co 9 S 8 -M 0.05 C 0.95 S heterojunction catalyst not only accelerates the migration and transfer of electrons, but also provides abundant reaction sites. Therefore, the Co 9 S 8 -M 0.05 C 0.95 S composite catalyst has good catalytic activity.

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“…Stability tests show that the total amount of produced hydrogen is only slightly reduced at the end of each cycle. This is mainly because the adsorbed EY dye is easily desorbed and diffused into the solution, and the catalyst has slight photo-induced corrosion [38,40,41]. Compared with the first cycle, the fourth cycle is only down by 13.7%, which indicates that the Cu-Co-2P-2 photocatalyst has excellent cycle stability and certain application prospects.…”

Section: Photocatalytic Hydrogen Evolution Activity Of the Catalystmentioning

confidence: 99%

“…Absorption in the ultraviolet and near infrared regions means that the catalyst can achieve electronic transitions at higher or lower energies. The stronger light absorption capacity of photocatalyst means the stronger probability of electron transfer under light, which is more favorable for H 2 evolution [37,38]. Co-P, Cu-P and Cu-Co-2P-2 samples continue to maintain high levels of absorbance with increasing wavelength, which means that light energy is more utilized [39].…”

Section: Morphology Structure and Compositions Analysismentioning

confidence: 99%

“…The system with extra acid orbase is not conducive to theprocess of the hydrogen precipitation reaction [30]. This is because the neutral solution contains a large amount of H + , which may cause the protonation of the triethanolamine solution and serious decrease of the electron donor effectiveness [38,39]. When the reaction conditions become strongly basic, the thermodynamic driving force for hydrogen evolution is obviously insufficient due to the lack of H + [40].…”

Section: Photocatalytic Hydrogen Evolution Activity Of the Catalystmentioning

confidence: 99%

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MOFs-derived Cu3P@CoP p-n heterojunction for photocatalytic hydrogen evolution

Zhang¹,

Hao²,

Jin³

et al.

Authorea

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In this study, we developed a novel in situ growth scheme to construct the Cu-MOFs@ZIF-9(Co) core-shell precursor material. The Cu-MOFs@ZIF-9(Co) core-shell precursor was treated by low-temperature phosphorization to obtain a Cu3P@CoP composite catalyst with a self-supporting structure. Cu3P@CoP composite catalyst not only has a hierarchical structure, but also builds a p-n heterojunction at the interface. The unique structure and composition of Cu3P@CoP can promote charge migration and provide large surface area and rich active sites to drive water photolysis. In addition, by controlling the degree of phosphation of Cu-MOFs@ZIF-9(Co) material and adjusting the ratio of Cu and Co, it was found that the maximum hydrogenproducing activity of the composite photocatalyst reaches 469.95 μmol, and it has a very excellent cycle stability. The results of photoelectrochemical and fluorescence tests showed that the proper conduction and valence band of Cu3P and CoP formed a more effective path way for charge transfer.

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Construction strategy of Mo-S@Mo-P heterojunction formed with in-situ phosphating Mo-S nanospheres toward efficient photocatalytic hydrogen production

Cited by 76 publications

References 76 publications

CdS Reinforced with CoS_X/NiCo‐LDH Core‐shell Co‐catalyst Demonstrate High Photocatalytic Hydrogen Evolution and Durability in Anhydrous Ethanol

CdS Reinforced with CoS_X/NiCo‐LDH Core‐shell Co‐catalyst Demonstrate High Photocatalytic Hydrogen Evolution and Durability in Anhydrous Ethanol

Mn _0. ₀₅ Cd ₀ _. ₉₅ S decorated MOF ‐derived Co ₉ S ₈ hollow polyhedron for efficient photocatalytic hydrogen evolu

MOFs-derived Cu3P@CoP p-n heterojunction for photocatalytic hydrogen evolution

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Construction strategy of Mo-S@Mo-P heterojunction formed with in-situ phosphating Mo-S nanospheres toward efficient photocatalytic hydrogen production

Cited by 76 publications

References 76 publications

CdS Reinforced with CoSX/NiCo‐LDH Core‐shell Co‐catalyst Demonstrate High Photocatalytic Hydrogen Evolution and Durability in Anhydrous Ethanol

CdS Reinforced with CoSX/NiCo‐LDH Core‐shell Co‐catalyst Demonstrate High Photocatalytic Hydrogen Evolution and Durability in Anhydrous Ethanol

Mn 0. 05 Cd 0 . 95 S decorated MOF ‐derived Co 9 S 8 hollow polyhedron for efficient photocatalytic hydrogen evolu

MOFs-derived Cu3P@CoP p-n heterojunction for photocatalytic hydrogen evolution

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CdS Reinforced with CoS_X/NiCo‐LDH Core‐shell Co‐catalyst Demonstrate High Photocatalytic Hydrogen Evolution and Durability in Anhydrous Ethanol

CdS Reinforced with CoS_X/NiCo‐LDH Core‐shell Co‐catalyst Demonstrate High Photocatalytic Hydrogen Evolution and Durability in Anhydrous Ethanol

Mn _0. ₀₅ Cd ₀ _. ₉₅ S decorated MOF ‐derived Co ₉ S ₈ hollow polyhedron for efficient photocatalytic hydrogen evolu