Voprosy Khimii i Khimicheskoi Tekhnologii最新文献_第2页

Anodic surface treatment of nickel in eutectic ionic liquids based on choline chloride for electrochemical polishing and enhancement of electrocatalytic activity in hydrogen evolution reaction 在基于氯化胆碱的共晶离子液体中对镍进行阳极表面处理，以实现电化学抛光并提高氢进化反应的电催化活性

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2024-02-01 DOI: 10.32434/0321-4095-2024-152-1-89-98

V. Protsenko, D. Makhota, T. Butyrina, S. Korniy, F. Danilov

{"title":"Anodic surface treatment of nickel in eutectic ionic liquids based on choline chloride for electrochemical polishing and enhancement of electrocatalytic activity in hydrogen evolution reaction","authors":"V. Protsenko, D. Makhota, T. Butyrina, S. Korniy, F. Danilov","doi":"10.32434/0321-4095-2024-152-1-89-98","DOIUrl":"https://doi.org/10.32434/0321-4095-2024-152-1-89-98","url":null,"abstract":"The paper reports the impact of anodic potentiostatic treatment of nickel in two representatives of a new type of eutectic ionic liquids (deep eutectic solvents), ethaline and reline, which are eutectic mixtures of choline chloride with ethylene glycol and urea, respectively. The influence of anodic treatment on surface morphology, roughness coefficients, and electrocatalytic activity towards the hydrogen evolution reaction is characterized. It is demonstrated that the current densities of nickel anodic dissolution in reline are approximately an order of magnitude lower than in ethaline under all other identical conditions. Significant differences in the kinetics of nickel anodic dissolution and passivation during anodic polarization in ethaline and reline have been established, which may be attributed to both a substantial difference in the viscosity of these solvents and differences in the chemical nature and composition of the ions present in them. It is found that anodic treatment in ethaline, at certain potentials, results in electrochemical polishing of the surface, confirmed by a decrease in measured roughness coefficients, while anodic treatment in reline does not allow effective electropolishing and only surface etching (increase in roughness coefficients) is observed. Anodic potentiostatic treatment of nickel in both investigated deep eutectic solvents at specific electrode potential values significantly enhances the electrocatalytic activity of the surface towards the hydrogen evolution reaction in an alkaline environment. This finding can be utilized in the development of electrocatalytic materials for the electrolytic synthesis of green hydrogen.","PeriodicalId":23684,"journal":{"name":"Voprosy Khimii i Khimicheskoi Tekhnologii","volume":"91 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140462857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of various compositions on corrosion rate of steel in formation water and freezing temperature of high-paraffin model oil 不同成分对钢材在地层水中的腐蚀速率和高paraffin模型油凝固温度的影响

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2024-02-01 DOI: 10.32434/0321-4095-2024-152-1-64-69

S. Pashayeva

{"title":"Effect of various compositions on corrosion rate of steel in formation water and freezing temperature of high-paraffin model oil","authors":"S. Pashayeva","doi":"10.32434/0321-4095-2024-152-1-64-69","DOIUrl":"https://doi.org/10.32434/0321-4095-2024-152-1-64-69","url":null,"abstract":"The effects of Gossypol resin and NDP-6 reagents and Z-1 composition (the mixture of NDP-6+Gossypol resin at the ratio of 9:1) on the corrosion rate of steel in the formation water and the freezing temperature of high-paraffin model oil were investigated for the first time under laboratory conditions. In the experiments, a model oil sample prepared in a ratio of 2:1 of commercial oils from Narimanov and Absheron fields of SOCAR was used as a research object, and a formation water sample taken from well No. 1082 of “Bibiheybatneft” OGPI, SOCAR was used as an electrochemical corrosion medium. It was determined that the new composition had a more effective impact on the corrosion rate in H2S-containing formation water and the freezing temperature of high-paraffin oil sample than individual reagents. Thus, the highest efficiency for gossypol resin was observed at a concentration of 110 mg/l, when the corrosion rate was 0.09 g/m2h (corrosion protection efficiency of 98%). The most effective indicator for NDP-6 depressant additive was 1000 g/t, and the freezing temperature of high-paraffin model oil was stated to decrease from +160С to –20С. However, the strongest effect has been observed for the Z-1 composition. Thus, the composition with a concentration of 700 g/t reduces the corrosion rate in the formation water from 4.30 g/m2h to 0.04 g/m2h (corrosion protection efficiency of 99%) and the freezing temperature of model oil from +160С to –90C.","PeriodicalId":23684,"journal":{"name":"Voprosy Khimii i Khimicheskoi Tekhnologii","volume":"672 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140466275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrocatalytic behavior of Ni–Mo alloy electrodeposited from deep eutectic solvents-assisted plating baths: electrochemical impedance spectroscopy study 深共晶溶剂辅助电镀液中电沉积的镍钼合金的电催化行为：电化学阻抗谱研究

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2024-02-01 DOI: 10.32434/0321-4095-2024-152-1-81-88

V. Protsenko, L. Bobrova, O. Sukhatskyi, F. Danilov

{"title":"Electrocatalytic behavior of Ni–Mo alloy electrodeposited from deep eutectic solvents-assisted plating baths: electrochemical impedance spectroscopy study","authors":"V. Protsenko, L. Bobrova, O. Sukhatskyi, F. Danilov","doi":"10.32434/0321-4095-2024-152-1-81-88","DOIUrl":"https://doi.org/10.32434/0321-4095-2024-152-1-81-88","url":null,"abstract":"The electrocatalytic behavior of electrodeposited Ni and Ni–Mo alloy coatings in the hydrogen evolution reaction in a 1 M NaOH aqueous solution was investigated by means of the electrochemical impedance spectroscopy method. The electrochemical deposition of electrocatalytic coatings was carried out using electrolytes based on deep eutectic solvents (eutectic mixtures of choline chloride with ethylene glycol or urea). To simulate the recorded Nyquist plots reflecting the electrocatalytic performance of deposited coatings, a modified Armstrong-Henderson equivalent circuit was employed, which accounts for the involvement of adsorbed intermediates in the reaction. The equivalent circuit included three polarization resistances and three constant phase elements, allowing for the consideration of the localization of the electrochemical process on different surface microdomains. It was found that the electrocatalytic activity of nickel coatings deposited from deep eutectic solvents exceeded the activity of nickel fabricated in an aqueous electrolyte. The increase in molybdenum content in the coating was shown to enhance electrocatalytic activity. It was established that the main reasons for improving the electrocatalytic properties of the Ni–Mo alloy coatings are structural-morphological factors (increase in the degree of microheterogeneity of the surface and the development of the surface area available for electrochemical reaction) and the formation of a favorable electronic structure of the metal, leading to the acceleration of the rate-determining Volmer step.","PeriodicalId":23684,"journal":{"name":"Voprosy Khimii i Khimicheskoi Tekhnologii","volume":"35 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140463596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of the composition of matte glaze with usage of pharmaceutical glass waste for the production of porcelain stoneware 利用医药玻璃废料生产陶瓷用哑光釉料的研制

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2023-10-01 DOI: 10.32434/0321-4095-2023-150-5-123-134

O.Yu. Fedorenko, N.M. Samoilenko, A.О. Baranova, G.V. Lisachuk, R.V. Kryvobok

{"title":"Development of the composition of matte glaze with usage of pharmaceutical glass waste for the production of porcelain stoneware","authors":"O.Yu. Fedorenko, N.M. Samoilenko, A.О. Baranova, G.V. Lisachuk, R.V. Kryvobok","doi":"10.32434/0321-4095-2023-150-5-123-134","DOIUrl":"https://doi.org/10.32434/0321-4095-2023-150-5-123-134","url":null,"abstract":"The paper shows the prospects of using pharmaceutical glass waste for partial replacement of high-value frits in the glazes composition. According to the results of X-ray fluorescence spectroscopy, the glass wastes belong to the group of alkali-containing aluminoborosilicate glasses. The results of thermomicroscopic and dilatometry studies showed that the combination of industrial waste frits and glass waste allows obtaining coatings that, according to their technological characteristics, meet the conditions of porcelain stoneware high-speed firing. The conditions for the resource-valued glass waste use as part of porcelain stoneware tiles glazes have been established. This allowed to use their potential as efficiently as possible and to partially replace (within 15–30%) high-value frits. Combinations of waste glass and industrial boron-free frits with high crystallization ability due to the increased content of alkaline earth oxides (RO=22–34 wt.%) were studied to prepare opaque matte coatings. Glazes compositions have been developed, which under conditions of high-speed firing, form matte coatings due to the directed crystallization of phase’s complex (ZnAl2O4, Zn2SiO4 and CaAl2Si2O8). Ceramic granite with white color coating (brightness coefficient of 80–83%) that differs by \"silky\" mattness (mirror reflection coefficient of 31–42%), high heat resistance (10 or more heat changes) and abrasion resistance of III–IV class was obtained. The best results were observed when using matte glazes in a complex with engobe, which includes the same glass waste in the amount of up to 30 wt.%. This is in general ensures a high level of their utilization, a significant high-value raw materials saving and an energy costs reduction for fritting.","PeriodicalId":23684,"journal":{"name":"Voprosy Khimii i Khimicheskoi Tekhnologii","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136094735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of parameters of polylactide processing on a 3D printer 3D打印机上聚丙交酯加工参数的优化

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2023-10-01 DOI: 10.32434/0321-4095-2023-150-5-29-35

O.S. Kabat, O.О. Naumenko, К.V. Heti

引用次数: 0

The ternary system Gd–Ge–Sn at 600 0C 600℃时三元体系Gd-Ge-Sn

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2023-10-01 DOI: 10.32434/0321-4095-2023-150-5-14-23

R. Dankevych, Ya. Tokaychuk, R. Gladyshevskii

{"title":"The ternary system Gd–Ge–Sn at 600 0C","authors":"R. Dankevych, Ya. Tokaychuk, R. Gladyshevskii","doi":"10.32434/0321-4095-2023-150-5-14-23","DOIUrl":"https://doi.org/10.32434/0321-4095-2023-150-5-14-23","url":null,"abstract":"The isothermal section at 6000C of the phase diagram of the ternary system Gd–Ge–Sn was constructed in the whole concentration range, based on X-ray powder diffraction and energy-dispersive X-ray spectroscopy. The formation of two continuous solid solutions, Gd5Ge4–xSnx (x=0–4, structure type Sm5Ge4, Pearson symbol oP36, space group Pnma, a=7.8565(12)–8.040(2), b=14.812(2)–15.552(3), c=7.7781(12)–8.201(2) Å) and Gd5Ge3–xSnx (x=0–3, structure type Mn5Si3, hP16, P63/mcm, a=8.5702(8)–9.0306(13), c=6.4305(5)–6.5941(10) Å), and limited solid solutions based on the binary compounds Gd11Ge10 (6 at.% Sn), GdSn3 (5.5 at.% Ge), Gd3Sn7 (2 at.% Ge), GdSn2 (5 at.% Ge), and Gd11Sn10 (3.5 at.% Ge) was established. Three following ternary compounds were found in the system at 6000C: Gd2Ge3.84Sn0.92, GdGe0.75–0.85Sn1.25–1.15, and Gd2Ge2.91Sn0.80. The detailed crystal structures of two of them were refined on X-ray powder diffraction data: GdGe0.75–0.85Sn1.25–1.15, structure type ScCo0.25Si1.75, oS12, Cmcm, a=4.3206(4)–4.3035(4), b=16.4824(15)–16.4433(14), c=4.1270(4)–4.0961(4) Å and Gd2Ge2.91Sn0.80, structure type Gd2Ge3.38Bi0.42, oS32, Cmcm, a=4.0445(6), b=30.473(5), c=4.1694(6) Å. The third compound, Gd2Ge3.84Sn0.92, adopts the structure type Nd2Ge3.55Sn1.24. The crystal structures are closely related and are built from layers of Gd6 trigonal prisms centered by Ge atoms (or in part by Sn atoms) and square-mesh nets of Sn atoms (or in part Ge atoms), which alternate along the crystallographic direction [010]. Partial disorder of Ge and Sn atoms is observed.","PeriodicalId":23684,"journal":{"name":"Voprosy Khimii i Khimicheskoi Tekhnologii","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136094621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pd(II)–Cu(II) compositions fixed on dispersed silica from ammonia solutions for carbon monoxide oxidation with air oxygen Pd(II) -Cu (II)组合物固定在分散的二氧化硅上，从氨溶液中用空气氧氧化一氧化碳

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2023-10-01 DOI: 10.32434/0321-4095-2023-150-5-36-42

T.О. Kiose, T.L. Rakytska, K.О. Holubchyk

{"title":"Pd(II)–Cu(II) compositions fixed on dispersed silica from ammonia solutions for carbon monoxide oxidation with air oxygen","authors":"T.О. Kiose, T.L. Rakytska, K.О. Holubchyk","doi":"10.32434/0321-4095-2023-150-5-36-42","DOIUrl":"https://doi.org/10.32434/0321-4095-2023-150-5-36-42","url":null,"abstract":"The samples of dispersed silica, tripoli from the Konoplyansky deposit, were used in this work. Pd(II)–Cu(II) compounds fixed on dispersed silica for the oxidation of carbon monoxide with air oxygen were obtained by impregnation of the carrier, which was previously boiled in distilled water for one hour, through NH3-coordination in the presence of ethyl alcohol, followed by maturation of the catalyst at 200C for 20 hours and drying at 3000C for 4 hours. The initial and chemically modified samples of tripoli were characterized by X-ray phase analysis, IR-spectral and thermogravimetric research methods and tested in the reaction of low-temperature oxidation of carbon monoxide with oxygen. The degree of CO conversion in the stationary mode was used to estimate the activity of the catalyst. It was established that the activity of copper-palladium catalysts is significantly affected by the method of catalyst preparation, namely: the sequence of mixing the starting solutions, the drying temperature, and the content of the catalyst components. The catalyst with the highest activity contained all the components, such as K2PdCl4, Cu(NO3)2, NH4OH, KBr, and С2Н5ОН, mixed beforehand in the specified sequence. It provides air purification from CO to a concentration that is 5 times lower than the maximum permissible concentration for the working area (MPCCO=20 mg/m3). The degree of CO oxidation reaches 98.6%. With other variations of the method of the catalyst preparation, the samples show much lower activity, which indicates the formation of surface complexes of different composition, responsible for the oxidation of carbon monoxide by air oxygen.","PeriodicalId":23684,"journal":{"name":"Voprosy Khimii i Khimicheskoi Tekhnologii","volume":"216 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136094626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structure, morphology and phase composition of anodized titanium dioxide nanotubes loaded with Pt and Pd 负载Pt和Pd的阳极氧化二氧化钛纳米管的结构、形貌和相组成

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2023-10-01 DOI: 10.32434/0321-4095-2023-150-5-43-49

V. Knysh, O. Shmychkova, T. Luk'yanenko, A. Velichenko

引用次数: 0

CO2 electroreduction in aqueous and acetonitrile solutions on porous cathode fabricated by anode dezincification of CuZn 用CuZn阳极脱锌法制备多孔阴极，在水溶液和乙腈溶液中电还原CO2

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2023-10-01 DOI: 10.32434/0321-4095-2023-150-5-55-63

Оrest Kuntyi, Galyna Zozulya, Mariana Shepida, Roman Mnykh, Artur Mazur, Sergiy Korniy, Volodymyr Babizhetskyy, Anatoliy Zelinskiy

{"title":"CO2 electroreduction in aqueous and acetonitrile solutions on porous cathode fabricated by anode dezincification of CuZn","authors":"Оrest Kuntyi, Galyna Zozulya, Mariana Shepida, Roman Mnykh, Artur Mazur, Sergiy Korniy, Volodymyr Babizhetskyy, Anatoliy Zelinskiy","doi":"10.32434/0321-4095-2023-150-5-55-63","DOIUrl":"https://doi.org/10.32434/0321-4095-2023-150-5-55-63","url":null,"abstract":"The rates of the CO2 electrochemical reduction were determined on porous cathodes formed by electrochemical dealloying of CuZn under different regimes of selective anodic dezincification of brass. It was established that the formation of a porous surface proceeds in two following stages: 1) the dissolution of Zn from the CuZn mainly along the grain boundaries with the formation of submicron crevices between them, and 2) electrochemical dezincification of brass grains and formation of nanopores. The zinc content in the nanoporous copper surface is less than 1%. It was proved that anodically dezincified brass porous cathodes demonstrate a significantly higher CO2 reduction current on their surface than smooth copper and brass surfaces. For instance, in aqueous solutions, at an electrode potential of –1.5 V, the value of cathode current density on porous Cu cathodes is between 5 to 9 mAcm–2, while it is only 2.5 and 1.5 mAcm–2 on smooth Cu and CuZn cathodes, respectively. A similar trend is observed in an acetonitrile environment, where the current density of the CO2 electroreduction at the electrode potential of –3.0 V is 22 to 27 mAcm–2, 15 mAcm–2, and 18 mAcm–2 on porous cathodes, Cu cathode, and CuZn cathode, respectively. As the pore size decreases from submicron to submicron-nanosized, there is a tendency for an increase in cathodic currents by approximately 80% and 25% in aqueous and in acetonitrile solutions, respectively. Additionally, CO2 recovery on porous cathodes remains stable during long-term electrolysis at an electrode potential below –1.5 V.","PeriodicalId":23684,"journal":{"name":"Voprosy Khimii i Khimicheskoi Tekhnologii","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136160185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of the compaction product on a nickel/diatomaceous earth catalyst 镍/硅藻土催化剂压实产物的研究

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2023-10-01 DOI: 10.32434/0321-4095-2023-150-5-24-28

Elshan T. Zeynalov, Narmina T. Aliyeva, Sudaba H. Novruzova, Yelena Y. Shmoncheva

引用次数: 0