Co-MOF induced “blossom branch like” MoS2@Co9S8/C nanofibers as a bifunctional catalyst for HER and OER

Hou, Xuebin; Xie, Kaifeng; Huang, Zelong; Chen, Shi; Wei, Qufu; Hu, Yi

doi:10.1016/j.apsusc.2023.156486

Cited by 16 publications

(7 citation statements)

References 38 publications

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“…The peak positioned at 871.3 and 875.1 eV in the peak split of Ni 2p was Ni 2p 1/2 , and 853.6 and 856.7 eV were attributed to Ni 2p 3/2 . The peak split in Figure e indicates the Mo element, in which 228 eV belonged to Mo 3d 5/2 , 232.1 eV belonged to Mo 3d 3/2 , while 231 eV confirmed the oxidation state of Mo. ,, …”

Section: Results and Discussionmentioning

confidence: 96%

Photocatalytic and Superhydrophobic Nanoporous Membranes for Emulsion Separation and Removal of Pesticides and Pharmaceutical Products

Chen,

Han,

Guo

et al. 2024

ACS Appl. Nano Mater.

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Metal organic framework (MOF)-derivatives have a larger specific surface area, higher porosity, tunable pore size, higher conductivity, good stability, more exposed active species, etc., but few literature are reported about their application potential in micropollutant separation and removal. In view of this, a robust MOF derivative-based photocatalytic superhydrophobic membrane (D6/ TiO 2 /MoS 2 /NiCo-NC/PVDF) was successfully fabricated for the first time through solvothermal synthesis and chemical modification, combined with a negative pressure-assisted loading approach. (1) The MoS 2 -doping strategy effectively avoided the collapse and coarsening of cauliflower-like MOFs during the calcination phase and simultaneously ensured the uniform distribution of metal particles in MOF-derived carbons. (2) The synergistic catalysis of the NiCo-MOF derivative, MoS 2 , and TiO 2 enhanced the transfer efficiency of electrons and free radicals, achieving efficient in situ degradation of pesticides and pharmaceutical and personal care products. (3) The introduction of sodium alginate greatly improved the adhesion between the coating and polyvinylidene fluoride (PVDF) membrane and simultaneously enhanced the growth of MOFs through complexation. (4) The cauliflower-like MOF-derived carbon skeleton with higher surface areas and micronanoporosity combined with a heterogeneous MoS 2 structure provided a large specific surface area and enough adsorption sites for various pollutants. High thermal calcination treatment greatly enhanced MOF growth rate, thus resulting in a flaky structure with high regularity and a large specific area. ( 5) The ultralow surface energy of interlaced siloxane molecules endowed the hybrid membrane with robust superhydrophobicity and superoleophilicity, always maintaining superhydrophobicity after long-time photodegradation. The final membrane achieved continuous emulsion separation and a photocatalytic self-cleaning property. The separation efficiency of the hybrid membrane for emulsions was still up to 97% after reuse for 120 cycles, and it could degrade 86.5% PRO, 90.1% ACE, 92.1% ASP, and 94.3% SMZ, respectively, with the initial concentration of 10 mg/L. The driving forces for oil−water separation and decontamination of the D6/TiO 2 /MoS 2 /NiCo-NC/PVDF membrane mainly involved the grasping forces of dodecamethylcyclohexasiloxane, capillary force of inner pores, electrostatic interaction, hydrogen bond interaction, partial p-π conjugation, van der Waals force, and lipophilicity.

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Section: Results and Discussionmentioning

confidence: 96%

Photocatalytic and Superhydrophobic Nanoporous Membranes for Emulsion Separation and Removal of Pesticides and Pharmaceutical Products

Chen,

Han,

Guo

et al. 2024

ACS Appl. Nano Mater.

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“…Compared to NiFe@CNF, the I D /I G values of the phosphated samples are larger since the phosphorization would increase the disorder degree of carbon and lattice defects. These generated defects could promote the active site exposure and improve the electrocatalytic efficiency 58,59 …”

Section: Resultsmentioning

confidence: 99%

“…These generated defects could promote the active site exposure and improve the electrocatalytic efficiency. 58,59 According to previous reports, 60,61 the phosphating temperature is an important factor for synthesizing effective electrocatalysts, affecting the morphology and catalytic activity of the metal phosphides. The samples obtained at different phosphating temperatures (300, 400, and 500 C) exhibit an average diameter of around 200-300 nm (Figures 3 and S4).…”

Section: Resultsmentioning

confidence: 99%

Prussian blue analog‐derived bimetallic phosphide nanoparticles anchored in nitrogen‐doped porous electrospun carbon nanofibers for efficient oxygen evolution reaction

Ren,

Yu,

Liu

2023

Applied Organom Chemis

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Prussian blue analogs (PBAs) and their derivatives have been extensively investigated as potential oxygen evolution reaction (OER) electrocatalysts due to their high specific surface areas, adjustable composition, and controllable morphology, yet they suffer from easy aggregation and poor electrical conductivity. Herein, we successfully synthesized PBA‐derived NiFe bimetallic phosphide nanoparticles encapsulated in porous nitrogen‐doped electrospun carbon nanofibers by sequential electrospinning, carbonization, and phosphorization. By exploring the effects of different phosphating temperatures on electrocatalytic performance, the obtained electrocatalyst possesses a low overpotential of 262 mV at 10 mA cm−2 for OER in 1.0 M KOH. The electrospun carbon nanofibers can not only address the problem of poor electrical conductivity of PBA derivatives but also provide confinement effect, which could reduce PBA aggregation and collapse. Furthermore, the coupling effect of porous nitrogen‐doped electrospun carbon nanofibers and PBA‐derived bimetallic phosphide nanoparticles facilitates sufficient exposure of active species, expedites electron transfer, accelerates reaction kinetics, and improves durability.

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Section: Introductionmentioning

confidence: 99%

“…With the dramatic increase in demand for sustainable and clean energy, hydrogen energy has attracted wide attention because of its huge energy density and environmental friendliness. , Water electrolysis may be the best option for commercial hydrogen production due to its high product purity and production efficiency. , As a critical half-reaction in water splitting, the oxygen evolution reaction (OER) requires robust catalysts to achieve efficient and sustainable oxygen production. , To date, Ir/Ru-based materials are considered state-of-the-art catalysts for OER, while the high cost and scarcity of noble metals have become their obstacles for commercial application. − Therefore, it is imperative to exploit high-efficiency, low-cost, and ultrastable non-noble metal OER electrocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Constructing Chainmail-Structured CoP/C Nanospheres as Highly Active Anodic Electrocatalysts for Oxygen Evolution Reaction

Nan,

Liu,

Liu

et al. 2024

ACS Appl. Mater. Interfaces

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Constructing highly active and noble metal-free electrocatalysts is significant for the anodic oxygen evolution reaction (OER). Herein, uniform carbon-coated CoP nanospheres (CoP/C) are developed by a direct impregnation coupling phosphorization approach. Importantly, CoP/C only takes a small overpotential of 230 mV at the current density of 10 mA cm–2 and displays a Tafel slope of 56.87 mV dec–1. Furthermore, the intrinsic activity of CoP/C is 21.44 times better than that of commercial RuO2 under an overpotential of 260 mV. In situ Raman spectroscopy studies revealed that a large number of generated Co–O and Co–OH species could facilitate the *OH adsorption, effectively accelerating the reaction kinetics. Meanwhile, the carbon shell with a large number of mesoporous pores acts as the chainmail of CoP, which could improve the active surface area of the catalyst and prevent the Co sites from oxidative dissolution. This work provides a facile and effective reference for the development of highly active and stable OER catalysts.

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Co-MOF induced “blossom branch like” MoS2@Co9S8/C nanofibers as a bifunctional catalyst for HER and OER

Cited by 16 publications

References 38 publications

Photocatalytic and Superhydrophobic Nanoporous Membranes for Emulsion Separation and Removal of Pesticides and Pharmaceutical Products

Photocatalytic and Superhydrophobic Nanoporous Membranes for Emulsion Separation and Removal of Pesticides and Pharmaceutical Products

Prussian blue analog‐derived bimetallic phosphide nanoparticles anchored in nitrogen‐doped porous electrospun carbon nanofibers for efficient oxygen evolution reaction

Constructing Chainmail-Structured CoP/C Nanospheres as Highly Active Anodic Electrocatalysts for Oxygen Evolution Reaction

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