Peroxide route to the synthesis of ultrafine CeO2-Fe2O3 nanocomposite via successive ionic layer deposition

Попков, В.И.; Tolstoy, Valeri P.; Неведомский, В. Н.

doi:10.1016/j.heliyon.2019.e01443

Cited by 15 publications

(5 citation statements)

References 40 publications

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“…In addition, the intense absorption band at 1360 cm −1 is clearly visible, which corresponds to the vibrations of the C-O bond in the carbonate group. It's associated with the sorption of CO 2 from the air by the developed surface of the samples [34][35][36][37][38][39][40]. The absorption bands of the Zn-O and Fe-O bonds in the wavenumber region of 300-600 cm −1 cannot be identified because of their diffuse shape [36].…”

Section: Fig 3 Results Of Edx Analysis (A) and Sem Micrographs (B-d) Of Samples Zf-lhsmentioning

confidence: 99%

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Layer by layer synthesis of zinc-iron layered hydroxy sulfate for electrocatalytic hydrogen evolution from ethanol in alkali media

Dmitriev¹,

Попков²

2019

Nanosystems: Phys. Chem. Math.

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This paper proposes a method for producing nanocomposite electrocatalytic coatings based on zinc-iron layered hydroxy sulfate Zn 2 Fe 4 (OH) 12 SO 4 • 8H 2 O and iron(III) hydroxide Fe(OH) 3 using the successive ionic layer deposition (SILD) method. The obtained materials were investigated with the methods of SEM and EDX, XRD, FTIR spectroscopy, and also were analyzed their electrocatalytic performance. These compounds are formed on the surface of the substrate in nanosheets shape with an average size of 6-17 nm, which self-organized into coral-like agglomerates. It was shown that by varying the anionic component of the reaction solution -NO 3− , SO 2− 4 or Cl − , effective control of the 2D nanocrystals phase composition is possible. It has been determined that electrocatalytic materials based on Zn 2 Fe 4 (OH) 12 SO 4 •8H 2 O and Fe(OH) 3 are active in the process of hydrogen evolution from alkaline water-alcohol solutions. In result overpotential value of hydrogen evolution reaction at 10 mA cm −2 decreases about ∼ 10%, as well as energy consumption to carry out this process reduces about 8-12%. as shown from the decline of the Tafel slope. The developed materials have high cyclic stability and short non-stationary mode, which allows them to be considered as the base of electrocatalysts for the processes of hydrogen evolution from ethanol in an alkaline medium.

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Section: Fig 3 Results Of Edx Analysis (A) and Sem Micrographs (B-d) Of Samples Zf-lhsmentioning

confidence: 99%

“…Automation of parameters allows to adjust the thickness of the electrocatalyst films, the selection of the composition and morphology. This method can be easily scalable for the synthesis of electrocatalytic materials at a standard temperature with simple hardware and the use of low-cost reagents [32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Layer by layer synthesis of zinc-iron layered hydroxy sulfate for electrocatalytic hydrogen evolution from ethanol in alkali media

Dmitriev¹,

Попков²

2019

Nanosystems: Phys. Chem. Math.

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“…The strong and broad absorption band at around 3300 cm −1 and a sharp peak at 3571 cm −1 is attributed to the stretching mode of -OH groups, which indicates the presence of hydroxyls in the free water and in the copper hydroxides, correspondently. The bands at 913, 1358, and 1561 cm −1 are attributed to the bending mode of H 2 O and CO 2 coordinated to metal ions [34] that is the result of adsorption of these substances by the developed surface of the hydroxide obtained. Three intense bands at 683, 610, and 512 cm −1 are attributed to Cu-O vibrations and additionally confirm the presence of copper hydroxide.…”

Section: Fig 2 a -Edx Spectrum; Bcd -Sem Images Of Co-doped Cu(ohmentioning

confidence: 98%

Successive ionic layer deposition of Co-doped Cu(OH)2 nanorods as electrode material for electrocatalytic reforming of ethanol

Kodintsev¹,

Martinson²,

Lobinsky³

et al. 2019

Nanosystems: Phys. Chem. Math.

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In this work, a facile and cost-effective layer by layer method was proposed to synthesize novel high stable and effective electrode material based on the Co-doped Cu(OH) 2 nanocrystals. The crystals have orthorhombic structure and a rod-like morphology with a 23±2 nm in width and 43±4 nm in length. The composition of the nanocrystals corresponds to the 1 % Co-doped Cu(OH) 2 by EDX with no noticeable impurities as it was found by FTIR spectroscopy. It was shown that nickel electrode modified with nanorods is characterized by an overvoltage value of −347 mV at 10 mA/cm 2 , which is 250 mV lower than that of an initial pure nickel electrode. The value of Tafel slope that reaches 138 mV/dec, high stability of the Co-doped Cu(OH) 2 nanorods in chronopotentiometric (10 hours) and cyclic volamperometric (500 cycles) tests allows us to consider them as a prospective basis of electrode materials for the hydrogen evolution from renewable water-alcohol sources.

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“…• Synthesis of environmental responsible ferrum-huminnanofertilization [26]. • Production of ultradisperse nanocomposite [27].…”

Section: These Are Inventions In Nanotechnological Area That Can Be Imentioning

confidence: 99%

Nanotechnologies: a review of inventions and utility models. Part II

Ivanov¹,

Kapustin²,

Borisova³

et al. 2020

Nanobuild

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A brief review of patents is given. The research performed by scientists, engineers and specialists in the area of nanotechnologies and nanomaterials resulted in increased efficiency of construction, housing sector and adjacent fields of economy.For example, an invention «A method to produce metal-polymer nanocomposite materials with metal nanoparticles» refers to the method used in production of polymer articles with nanoparticles of silver or copper, widely applied in different engineering areas and used as antibacterial material. The invention provides environmental responsible and reagentless method to obtain polymer articles with metal nanoparticles which size is 5-15 nm and boosts rangeof polymers, including hemicrystalline and amorphous glass-like ones. The invention «Exfoliated polyurethane nanocomposite with polyfluoroalkyl groups» refers to design of composite and nanocomposite materials and can be used to create materials applied in polymer industry, in particularly, in production of solidcoatings for sport facilities, hydroinsulation and roof coatings, construction sealers and tribotechnical articles. The specialists can also be interested in the following inventions in the area of nanotechnologies: a method to obtain metal nanopowder from lead bronze wastes in distilled water, a method to produce collector plates, a water defluoridation method,an exfoliated polyurethane nanocomposite with polyfluoroalkyl groups, amultifunctional grease lubricant for heavy loaded friction joint, a thermostatic system to perform nanocalorimetric measurements, a self-hardening composition based on polydimethylsiloxane et al.

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Peroxide route to the synthesis of ultrafine CeO2-Fe2O3 nanocomposite via successive ionic layer deposition

Cited by 15 publications

References 40 publications

Layer by layer synthesis of zinc-iron layered hydroxy sulfate for electrocatalytic hydrogen evolution from ethanol in alkali media

Layer by layer synthesis of zinc-iron layered hydroxy sulfate for electrocatalytic hydrogen evolution from ethanol in alkali media

Successive ionic layer deposition of Co-doped Cu(OH)2 nanorods as electrode material for electrocatalytic reforming of ethanol

Nanotechnologies: a review of inventions and utility models. Part II

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