Russian Chemical Bulletin最新文献_第10页

Synthesis of diffusion-hardening alloys from a mixture of solid components containing gallium powder 用含镓粉的固体组分混合物合成扩散硬化合金

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-08-26 DOI: 10.1007/s11172-026-5030-2

A. B. Shubin

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Efficiency of biocompatible organic corrosion inhibitors of magnesium alloys 镁合金生物相容性有机缓蚀剂的效能研究

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-08-26 DOI: 10.1007/s11172-026-5040-0

A. S. Gnedenkov, A. D. Nomerovskii, V. S. Marchenko, A. A. Leonov, S. L. Sinebryukhov, S. V. Gnedenkov

{"title":"Efficiency of biocompatible organic corrosion inhibitors of magnesium alloys","authors":"A. S. Gnedenkov, A. D. Nomerovskii, V. S. Marchenko, A. A. Leonov, S. L. Sinebryukhov, S. V. Gnedenkov","doi":"10.1007/s11172-026-5040-0","DOIUrl":"10.1007/s11172-026-5040-0","url":null,"abstract":"<div>Magnesium alloys are promising materials for the biodegradable implant formation. However, their high corrosion rate in physiological media limits their application. This work investigates the possibility of using non-toxic “green” corrosion inhibitors for MA8 alloy: l-cysteine, pyrocatechol, and curcumin. The influence of these compounds at concentrations of 10−1 and 10−4 mol L−1 on the corrosion behavior of this alloy in a 0.9 wt. % NaCl solution was studied using hydrogen evolution test, gravimetry, electrochemical impedance spectroscopy, and potentiodynamic polarization. A pronounced effect of cysteine and pyrocatechol concentrations on the corrosion activity of the material was found. At a high concentration (10−1 mol L−1), these compounds act as corrosion activators (increasing the corrosion rate by 2.5–7 times), which is associated with complexation processes and their participation in redox reactions. At a low concentration (10−4 mol L−1), all considered compounds exhibit inhibition activity. The highest inhibitor efficiency was recorded for pyrocatechol. According to hydrogen evolution data, adding this substance to a corrosive media reduced the corrosion rate by ∼9 times (to 0.24 mm year−1).</div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"75 6","pages":"1929 - 1937"},"PeriodicalIF":1.6,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148811087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Effect of platinum catalyst distribution on the gas sensing properties of ultradispersed NbV-doped TiO2 铂催化剂分布对超分散nbv掺杂TiO2气敏性能的影响

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-08-26 DOI: 10.1007/s11172-026-5021-3

A. A. Grebenkina, D. G. Filatova, M. D. Zabelina, N. V. Vladimirova, I. V. Sapkov, S. V. Maksimov, M. N. Rumyantseva, V. V. Krivetskiy

{"title":"Effect of platinum catalyst distribution on the gas sensing properties of ultradispersed NbV-doped TiO2","authors":"A. A. Grebenkina, D. G. Filatova, M. D. Zabelina, N. V. Vladimirova, I. V. Sapkov, S. V. Maksimov, M. N. Rumyantseva, V. V. Krivetskiy","doi":"10.1007/s11172-026-5021-3","DOIUrl":"10.1007/s11172-026-5021-3","url":null,"abstract":"<div>A set of analytical techniques including transmission electron microscopy, total reflection X-ray fluorescence spectrometry, and inductively coupled plasma mass spectrometry was employed to investigate the distribution of platinum between the crystallite surface and bulk in NbV-doped nanocrystalline TiO2 considering various routes of platinum introduction. It was shown than co-combustion of platinum and titanium precursors during the synthesis by flame spray pyrolysis (FSP) resulted in the formation of 2–4 nm Pt meta clusters uniformly distributed and partially encapsulated under TiOx layers due to the strong metal-support interaction effect. The use of the impregnation method followed by thermal decomposition was accompanied by the formation of large discrete platinum agglomerates dispersed in the array of nanocomposite particles. Both methods of TiO2 modification considerably enhanced the sensor response in the detection of low concentrations (20 ppm) of hydrogen. In the detection of acetone (20 ppm), this effect was twice as pronounced in the material synthesized by FSP.</div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"75 6","pages":"1716 - 1727"},"PeriodicalIF":1.6,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148811107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Preparation of Pt—Co catalysts for selective decomposition of hydrazine using bicarbonate solutions of platinum(iv) hydroxide 用氢氧化铂（iv）氢氧化钠溶液制备Pt-Co选择性分解肼催化剂

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-08-26 DOI: 10.1007/s11172-026-5037-8

P. A. Tkachenko, A. D. Varygin, T. Ya. Guselnikova, E. A. Maximovskiy, A. V. Zhurenok, I. P. Asanov, D. B. Vasilchenko, S. V. Korenev

{"title":"Preparation of Pt—Co catalysts for selective decomposition of hydrazine using bicarbonate solutions of platinum(iv) hydroxide","authors":"P. A. Tkachenko, A. D. Varygin, T. Ya. Guselnikova, E. A. Maximovskiy, A. V. Zhurenok, I. P. Asanov, D. B. Vasilchenko, S. V. Korenev","doi":"10.1007/s11172-026-5037-8","DOIUrl":"10.1007/s11172-026-5037-8","url":null,"abstract":"<div>An original method is proposed for the synthesis of bimetallic Pt1−xCox/Supp catalysts (Supp is a support). The procedure involves the preliminary deposition of cobalt(ii) carbonate on a supporting material followed by the hydrolytic deposition of platinum oxide nanoparticles from bicarbonate solutions of platinum(iv) hydroxide. This process affords composite materials that can be further reduced to alloy nanoparticles under a hydrogen atmosphere. The obtained samples were characterized by physicochemical methods and their efficiency in the selective catalytic decomposition of hydrazine for the hydrogen production was evaluated. According to the X-ray powder diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy data, the prepared particles are alloys of variable composition and their structures and morphology depend on the nature of the supporting material. The synthesized catalysts generally exhibit high activity in the hydrazine decomposition. The maximum activity was achieved with the Pt0.5Co0.5/Al2O3 catalyst, which is characterized by the exceptional stability under prolonged operating conditions.</div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"75 6","pages":"1903 - 1914"},"PeriodicalIF":1.6,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148811111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Analysis of haloplumbate film crystallization stages by shock freezing 冲击冷冻对氟铅膜结晶阶段的分析

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-08-26 DOI: 10.1007/s11172-026-5048-5

A. S. Tutantsev, T. O. Kadantseva, A. V. Dzuban, A. B. Tarasov, E. A. Goodilin

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Nanocomposites SnO2/SiO2 and WO3/SiO2: the role of amorphous SiO2 in microstructure stabilization and sensor response formation in benzene vapor detection 纳米复合材料SnO2/SiO2和WO3/SiO2：无定形SiO2在苯蒸汽检测中微观结构稳定和传感器响应形成中的作用

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-08-26 DOI: 10.1007/s11172-026-5022-2

R. S. Eshmakov, E. S. Vedeniapin, S. A. Talalaev, A. V. Sherstobitov, D. S. Glazkov, V. B. Platonov, A. V. Smirnov, S. V. Maksimov, I. V. Sapkov, M. N. Rumyantseva

{"title":"Nanocomposites SnO2/SiO2 and WO3/SiO2: the role of amorphous SiO2 in microstructure stabilization and sensor response formation in benzene vapor detection","authors":"R. S. Eshmakov, E. S. Vedeniapin, S. A. Talalaev, A. V. Sherstobitov, D. S. Glazkov, V. B. Platonov, A. V. Smirnov, S. V. Maksimov, I. V. Sapkov, M. N. Rumyantseva","doi":"10.1007/s11172-026-5022-2","DOIUrl":"10.1007/s11172-026-5022-2","url":null,"abstract":"<div>Nanocomposites SnO2/SiO2 ([Si]/[Si+Sn] = 15 at.%) and WO3/SiO2 ([Si]/[Si+W] = 5, 15, and 25 at.%) were synthesized by solvothermal treatment of a SiO2•xH2O sol in the presence of dried SnO2•xH2O and WO3•H2O gels, respectively, followed by high-temperature (600 °C) annealing. During the formation of the SnO2/SiO2 nanocomposites, the decrease in the growth rate of the SnO2 crystallites occurring due to the Zener—Smith effect is significantly more pronounced than upon the modification of WO3. A comparative analysis was performed for the first time, demonstrating that the choice of the semiconductor oxide precursor in the synthesis of composites with a stabilized small crystallite size and a high specific surface area is of principal importance. Compared to SnO2 and WO3 binary oxides, the SnO2/SiO2 and WO3/SiO2 nanocomposites exhibit an enhanced sensor response in the detection of 2 ppm of benzene in dry air (relative humidity RH = 0%). The SnO2/SiO2 nanocomposite maintains a high sensor response to benzene even when the relative humidity increases to RH = 30–90%.</div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"75 6","pages":"1728 - 1741"},"PeriodicalIF":1.6,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148811090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Synthesis, analgesic and antimicrobial activity of N-substituted 4-aryl-2-[2-(4-methylbenzoyl)hydrazinylidene]-4-oxobutanamides n -取代4-芳基-2-[2-（4-甲基苯甲酰）肼基]-4-氧丁烷酰胺的合成及其镇痛和抗菌活性

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-08-03 DOI: 10.1007/s11172-026-5000-8

E. I. Denisova, O. V. Zvereva, V. V. Novikova, R. R. Makhmudov, O. Yu. Ustinova, I. N. Chernov, I. A. Gorbunova, N. M. Igidov, D. A. Shipilovskikh

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Synthesis of stable polymer suspensions with a high mass fraction of polymer in the suspension 高质量聚合物的稳定聚合物悬浮液的合成

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-08-03 DOI: 10.1007/s11172-026-5009-z

I. A. Gritskova, A. A. Kuznetsov, N. A. Lobanova, A. V. Andreeva, A. A. Yezhova, V. V. Gorodov, G. V. Cherkaev, A. M. Shulgin, S. A. Gusev, S. N. Chvalun

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Recent advances in the synthesis and functionalization of graphite and graphene oxides 石墨和氧化石墨烯的合成和功能化研究进展

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-08-03 DOI: 10.1007/s11172-026-4987-1

A. A. Larin, V. V. Gnatovskaya, O. N. Oskolkova, D. T. Kurilenko, E. A. Vylivok, E. V. Khomutova, L. L. Fershtat

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Mechanisms of thermolysis of nitro-substituted 1-[2,2-bis(methoxy-NNO-azoxy)ethyl]pyrazoles 硝基取代1-[2,2-双（甲氧基- nno -偶氧基）乙基]吡唑的热裂解机理

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-08-03 DOI: 10.1007/s11172-026-5005-3

B. E. Krisyuk, I. N. Zyuzin, T. M. Sypko, N. V. Chukanov

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