Effect of plasma-chemical and thermal treatment in oxygen on the activity of Na3ZrM(PO4)3 phosphates (M = Zn, Co, Cu) in the transformation of butanol-2

Пылинина, А. И.; Povarova, E. I.; Михаленко, И. И.; Yagodovskaya, T. V.

doi:10.1134/s0036024413060216

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…Isobutanol dehydration proceeds in parallel with the dehydrogenation reaction only on the sample with xCu= 0.16. Catalytic activity BICUVOX-perovskites increases with the copper increasing content and the highest catalytic activity is observed on superconductive tetragonal γ-phase (Table 2) [5]. Plasma-chemical treatment (PCT) of all BICUVOX samples in oxygen, leads to the total deactivation of the active sites of dehydration reaction, and the alcohol is converted with 100% selectivity into aldehyde.…”

Section: Resultsmentioning

confidence: 99%

“…This advantage is used in the activation of catalysts and adsorbents. In some cases, plasma-chemical treatment (PCT) leads to a multifold increase in the activity of catalysts, due to changes in the nature of their active sites [5]. The aim of this work was to study the influence of PCT in oxygen on the catalytic activity of polymorphic copper-containing BICUVOX perovskites with the composition Bi4V2-2xCu2xO11-δ (х=0.00-0.16) in isobutanol reactions.…”

Section: Introductionmentioning

confidence: 99%

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Activity of Bi4v2-2xcu2xo11–δ in the Transformation of Isobutanol After Plasma-Chemical Treatment

Povarova¹,

Пылинина²,

Михаленко³

et al. 2018

Acta Metall. Slovaca

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The catalytic properties of plasma-chemically and thermally treated Bi4V2-2xCu2xO11-δ with х= 0.00-0.16 (BICUVOX) in the transformation of isobutanol are studied. Plasma treatments lead to the total deactivation of the active sites of dehydration reaction, and the alcohol is converted with 100% selectivity into aldehyde. Activity of the dehydrogenation of alcohol after PCT increases in ~ 1.7 times on samples with xCu=0.04-0.06 (. phases) compared to the initial samples. Similar values which were found for the samples with xCu=0.0-0.06, including the double vanadate, suggests that PCT affects the ceramic matrix with Bi, O and V elements. Addition of small amounts of copper does not change this effect. Keywords: new materials, nano-design, perovskite, plasma-chemical treatment IntroductionLayered materials, with their structure consisting of stacked sheets, represent an interesting opportunity for developing new materials with a tailored nano-design, controlled accessibility to the sites and properties, tuneable pore size and volume, and high surface area. The use of layered materials (layered perovskite, anionic clays, pillared clays) in catalytic reactions is reviewed with emphasis on the possibilities offered from these catalysts to develop new processes for environmental protection, selective oxidation and refinery/biorefinery [1]. Of a great interest are bismuth vanadates belonging to the BIMEVOX family, for which oxygen-ionic conductivity is typical. In the crystal structure of bismuth vanadate Bi4V2O11-δ, cations Bi 3+ are in tetrahedral coordination; V 5+ cations, in octahedral coordination. Bismuth vanadates exist in several polymorphic modifications (α-, or monoclinic; β-, or orthorhombic; and γ-, or tetragonal). The tetragonal modification occupies a special place among bismuth vanadate polymorphic modifications due to its high transport characteristics. It is the γ-phase that has the highest conductivity and the lowest activation energy value [2,3], since all oxygen atoms in vanadium octahedra are involved in the diffusion processes. In polymorphic perovskites, α ↔ β and β ↔ γ phase transitions are observed as abrupt changes in the total conductivity with rising temperature. The catalytic activity of polymorphic copper-containing BICUVOX perovskites with the composition Bi4V22xCu2xO11-δ (х =0.00-0.16) in isobutanol transformations was studied in [4]. Plasma-chemical treatment (PCT) allows us to obtain completely new materials with widely varied surface properties, while preserving most properties of the original materials. This

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Activity of Bi4v2-2xcu2xo11–δ in the Transformation of Isobutanol After Plasma-Chemical Treatment

Povarova¹,

Пылинина²,

Михаленко³

et al. 2018

Acta Metall. Slovaca

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“…It is known that the properties of perovskite catalysts are affected by the acid-base state of its surface [41,42], so a series of experiments was carried out to test the electronwithdrawing properties of the synthesized ferrites. The results obtained for all the studied samples are presented in Table 3.…”

Section: Characterizationmentioning

confidence: 99%

Insights into the Reactivity of Gd2−xSrxFe2O7 (x = 0 ÷ 0.4) in CO Radical Hydrogenation

Sheshko,

Borodina,

Yafarova

et al. 2023

Catalysts

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The effect of strontium substitution in the structure of the complex oxide Gd2SrFe2O7 on the production of light olefins by CO hydrogenation was investigated. Perovskite-type oxides Gd2−xSr1+xFe2O7 (x = 0; 0.1; 0.2; 0.3; 0.4) were synthesized by sol–gel technology and characterized by XRD, Mössbauer spectroscopy, BET specific area, acidity testing, and SEM. The experimental data revealed a correlation between the state of iron atoms, acidity, and catalytic performance. It was found that with an increase in the content of Sr2+ in the perovskite phase, the basicity of the surface and the oxygen diffusion rate increased. This contributed to the CO dissociative adsorption, formation of active carbon, and its further interaction with atomic hydrogen.

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Modifying the catalytic and adsorption properties of metals and oxides

Yagodovskii

2015

Russ. J. Phys. Chem.

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Effect of plasma-chemical and thermal treatment in oxygen on the activity of Na3ZrM(PO4)3 phosphates (M = Zn, Co, Cu) in the transformation of butanol-2

Cited by 3 publications

References 5 publications

Activity of Bi4v2-2xcu2xo11–δ in the Transformation of Isobutanol After Plasma-Chemical Treatment

Activity of Bi4v2-2xcu2xo11–δ in the Transformation of Isobutanol After Plasma-Chemical Treatment

Insights into the Reactivity of Gd2−xSrxFe2O7 (x = 0 ÷ 0.4) in CO Radical Hydrogenation

Modifying the catalytic and adsorption properties of metals and oxides

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