Densities, Viscosities, and Conductivities of Phosphonic Acid Solutions in <i>N</i>,<i>N</i>-Dimethylformamide and Water

Fadeeva, Yu. A.; Shmukler, L. E.; Safonova, L. P.

doi:10.1021/acs.jced.6b00430

Cited by 4 publications

(3 citation statements)

References 34 publications

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“…The difference between samples N1 and N2 should be triggered by the sole variable of solvent. It is known that elemental phosphorus is easily subjected to oxidation and hydrolysis with the presence of oxygen and water, eventually dissolving as oxyphosphorus ions or acids. , The dissolution and dissociation of the oxidized species are radically impeded in DMF . Therefore, we hypothesize that the removal of the oxidized exterior layer of commercial RP by solvent (especially water) and ambient O 2 offers fresh surfaces for effective interphase contact (Figure A), assisting the electron transfer efficiencies of samples.…”

Section: Resultsmentioning

confidence: 98%

“…52,53 The dissolution and dissociation of the oxidized species are radically impeded in DMF. 54 Therefore, we hypothesize that the removal of the oxidized exterior layer of commercial RP by solvent (especially water) and ambient O 2 offers fresh surfaces for effective interphase contact (Figure 4A), assisting the electron transfer efficiencies of samples. To prove this, we performed Fouriertransform infrared spectroscopy (FTIR) and found the intensities of peaks relating to oxidized species (e.g., PO, P−OH, HO−PO) 55,56 distinctly decline in sample N1 (Figure 4B).…”

Section: ■ Methodsmentioning

confidence: 99%

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Green and Facile Fabrication of Metal Oxide/Red Phosphorus Composite Catalysts for CO₂Photoreduction

Batur

Bian

et al. 2022

ACS Sustainable Chem. Eng.

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Photocatalyzed CO 2 reduction (CO 2 RR) transfers CO 2 into valuable products using renewable energy, attracting widespread attention. Composite catalysts fabricated with TiO 2 and red phosphorus (RP) might exhibit competitive advantages, but effective interphase binding is difficult to forge. The composites therefore require complex and energy-consuming syntheses, severely hindering their application in CO 2 RR. In this work, TiO 2 /RP composites with hyperefficient interphase contact, which outperform various elaborately designed catalysts, are directly prepared from commercially available materials via a green and facile hydrothermal approach. The low heating temperature and sole solvent of water diminish the energy input for synthesis and imply a potential opportunity to propel CO 2 RR with industrial waste heat and cooling water. Experimental and computational analyses reveal that hydrothermal synthesis reduces the interfering oxidized species on the exterior surface of RP, facilitating the relatively less favored interphase contact between TiO 2 and nonoxidized RP. Photoelectron transfer and catalytic performance of the composites are hence drastically enhanced. Further improvement of activity is feasible by slightly elevating the heating temperature, time, or solution acidity. Attributing to the universal applicability of this green approach, different metal oxide/RP composites (e.g., WO 3 /RP) are similarly prepared, consistently boosting the reaction rate multiple times.

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Section: Resultsmentioning

confidence: 98%

Section: ■ Methodsmentioning

confidence: 99%

Green and Facile Fabrication of Metal Oxide/Red Phosphorus Composite Catalysts for CO₂Photoreduction

Batur

Bian

et al. 2022

ACS Sustainable Chem. Eng.

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“…A second explanation for the reduction of the reaction currents could be due to the mass transport: 23,30 there is a considerable variation of viscosity 32,33 in the range of concentrations of phosphoric acid solutions used, with consequent changes in diffusion coefficient. 34 A third aspect to be considered consists of the charge transfer.…”

Section: Is Any Other Adsorbed Species Other Than Watermentioning

confidence: 99%

The Impact of Water Concentration on the Electro-Oxidation of Formic Acid on Platinum

Oliveria

Melle

Romano

et al. 2022

J. Electrochem. Soc.

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Water plays a pivotal role in several electrocatalytic reactions. In the electro-oxidation of small organic molecules, water can for instance assist the oxidation of adsorbed species or inhibit the reaction through the oxidation of surface sites. This paper is the third in a series of studies aiming at evaluating the impact of water concentration on the electro-oxidation of small organic molecules on polycrystalline platinum. The study was performed in phosphoric acid electrolyte, and the water concentration was varied from 14 to 50 mol L-1. Voltammetric profiles and potential oscillations were studied at distinct [H2O]/[H3PO4] ratios and constant concentration of formic acid. There is a diminution in the catalytic activity accompanying the decrease in the water concentration. The removal of carbon monoxide demands oxygenated species and can proceed in the absence of water for ethanol and methanol, but not for formic acid. Under oscillatory regime, the impact of water concentration, it is seen that higher water concentration implies higher oscillation frequencies, shorter and less stable time-series, and sharper transitions from low to high potential, where the adsorbed carbon monoxide is oxidized by adsorbed oxygenated species. Results are discussed in connection with the voltammetric study and also compared with other parent systems.

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Conductivity of gel polymer electrolytes doped with solutions of phosphonic acid or protic ionic liquids

Shmukler

Fadeeva

Glushenkova

et al. 2018

Chemical Physics Letters

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Densities, Viscosities, and Conductivities of Phosphonic Acid Solutions in N,N-Dimethylformamide and Water

Cited by 4 publications

References 34 publications

Green and Facile Fabrication of Metal Oxide/Red Phosphorus Composite Catalysts for CO₂Photoreduction

Green and Facile Fabrication of Metal Oxide/Red Phosphorus Composite Catalysts for CO₂Photoreduction

The Impact of Water Concentration on the Electro-Oxidation of Formic Acid on Platinum

Conductivity of gel polymer electrolytes doped with solutions of phosphonic acid or protic ionic liquids

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Densities, Viscosities, and Conductivities of Phosphonic Acid Solutions in N,N-Dimethylformamide and Water

Cited by 4 publications

References 34 publications

Green and Facile Fabrication of Metal Oxide/Red Phosphorus Composite Catalysts for CO2Photoreduction

Green and Facile Fabrication of Metal Oxide/Red Phosphorus Composite Catalysts for CO2Photoreduction

The Impact of Water Concentration on the Electro-Oxidation of Formic Acid on Platinum

Conductivity of gel polymer electrolytes doped with solutions of phosphonic acid or protic ionic liquids

Contact Info

Product

Resources

About

Green and Facile Fabrication of Metal Oxide/Red Phosphorus Composite Catalysts for CO₂Photoreduction

Green and Facile Fabrication of Metal Oxide/Red Phosphorus Composite Catalysts for CO₂Photoreduction