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Journal articles on the topic 'Zr oxidation ratio'

Author: Grafiati

Published: 24 June 2021

Last updated: 29 July 2025

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1

Afonasenko, Tatyana N., Daria V. Yurpalova, Zakhar S. Vinokurov, et al. "The Formation of Mn-Ce-Zr Oxide Catalysts for CO and Propane Oxidation: The Role of Element Content Ratio." Catalysts 13, no. 1 (2023): 211. http://dx.doi.org/10.3390/catal13010211.

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The MnOх-ZrO2-CeO2 oxide catalysts were synthesized by co-precipitation method with varying (1) Zr/Zr + Ce molar ratio at constant manganese content of 0.3; (2) manganese content at constant Zr/Ce molar ratio of 1; (3) Mn/Mn + Zr molar ratio at constant Ce content of 0.5. Catalysts are characterized by XRD, N2 adsorption, TPR, and XPS. The catalytic activity of all the series was tested in the CO and propane oxidation reactions. In contrast to the variation of the manganese content, the Zr/Zr + Ce molar ratio does not significantly affect the catalytic properties. The dependence of the catalyt

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2

Lun, Huilin, Yi Zeng, Xiang Xiong, et al. "Oxidation behavior of non-stoichiometric (Zr,Hf,Ti)Cx carbide solid solution powders in air." Journal of Advanced Ceramics 10, no. 4 (2021): 741–57. http://dx.doi.org/10.1007/s40145-021-0469-y.

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AbstractMulti-component solid solutions with non-stoichiometric compositions are characteristics of ultra-high temperature carbides as promising materials for hypersonic vehicles. However, for group IV transition-metal carbides, the oxidation behavior of multi-component non-stoichiometric (Zr,Hf,Ti)Cx carbide solid solution has not been clarified yet. The present work fabricated four kinds of (Zr,Hf,Ti)Cx carbide solid solution powders by free-pressureless spark plasma sintering to investigate the oxidation behavior of (Zr,Hf,Ti)Cx in air. The effects of metallic atom composition on oxidation

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3

Lin, Yu-Tse, Wen-Chung Liu, and Chin-Chiuan Kuo. "Elevated-temperature dry sliding wear behaviors of dual-cathode HiPIMS TiN and TiZrN films." Emerging Materials Research 14, no. 1 (2025): 01–21. https://doi.org/10.1680/jemmr.24.00123.

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Titanium–zirconium nitride films with three Zr / Ti ratios (16 / 35, 22 / 29, and 25 / 26) were deposited using Ti and Zr dual-cathode reactive high-power impulse closed-field magnetron sputtering by adjusting the average power ratio of two cathode materials. The sliding wear resistances of the obtained TiZrN films at different temperatures were compared. The results revealed that the ternary TiZrN film exhibited a higher hardness (approximately 35 GPa) and lower elastic modulus (approximately 360–380 GPa) than those of the binary TiN film. This contributed to the lower friction coefficient an

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4

Yoon, C. H., S. H. Cho, S. H. Kim, and S. R. Ha. "Catalytic wet air oxidation of p-nitrophenol (PNP) aqueous solution using multi-component heterogeneous catalysts." Water Science and Technology 43, no. 2 (2001): 229–36. http://dx.doi.org/10.2166/wst.2001.0094.

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This study investigated the decomposition of high strength p-nitrophenol (PNP) of 2,000 mg/l (3,400 mg of COD/1,250 mg of TOC) by catalytic wet air oxidation. Multi-component heterogeneous catalysts were used as catalysts for this purpose. The study results using a batch reactor showed that catalyst “D” (Mn-Ce-Zr 22.4 g plus CuSO4 1.0 g; Mn-Ce-Zr-Cu [CuSO4]) was more effective (56˜74%) than catalyst “A” (Mn-Ce-Zr 22.4 g) under the given conditions (O2 partial pressure of 1.0 MPa; temperature of 170˜190°C; 30 min of reaction time). The best result was obtained when 2 g of Mn-Ce-Zr-Cu [CuSO4] wa

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5

Ramos, Jesús Miguel, Jin An Wang, Sergio Odin Flores, et al. "Ultrasound-Assisted Hydrothermal Synthesis of V2O5/Zr-SBA-15 Catalysts for Production of Ultralow Sulfur Fuel." Catalysts 11, no. 4 (2021): 408. http://dx.doi.org/10.3390/catal11040408.

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This work reports the results of the ultrasound-assisted hydrothermal synthesis of two sets of V2O5 dispersed on SBA-15 and Zr doped SBA-15 catalysts used for the oxidation of dibenzothiophene (DBT) in a model diesel via the combination of oxidation, catalysis, and extraction technical route. These catalysts contained Lewis acidity as major and Brønsted acidity as minor. The amount of acidity varied with the content of vanadia and zirconium doping. It was found that DBT conversion is very sensitive to the Lewis acidity. DBT conversion increased by increasing the vanadium content and correlated

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6

Yugay, O. K., T. P. Mikhailovskaya, and K. A. Kadirbekov. "VAPOR-PHASE OXIDATION OF 2-METHYLPYRIDINEON V-Zr-O-CATALYSTS MODIFIED WITH TIN AND NIOBIUM OXIDES." Chemical Journal of Kazakhstan 79, no. 3 (2022): 101–9. http://dx.doi.org/10.51580/2022-3/2710-1185.83.

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Vapor-phase catalytic oxidation of pyridine alkyl derivatives is an effective method for obtaining a variety of physiologically active substances that are widely used in practice, as well as for the synthesis of solvents, starting materials for the production of dyes, herbicides, etc. For the process, a cheap oxidizing agent is used -atmospheric oxygen. Of great importance is the choice and creation of an active and selective process catalyst. Basically, the oxidation processes are carried out in the presence of catalysts based on vanadium oxide with the addition of transition metal oxides. Th

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7

Afonasenko, T. N., D. V. Glyzdova, V. L. Yurpalov, et al. "The Study of Thermal Stability of Mn-Zr-Ce, Mn-Ce and Mn-Zr Oxide Catalysts for CO Oxidation." Materials 15, no. 21 (2022): 7553. http://dx.doi.org/10.3390/ma15217553.

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MnOx-CeO2, MnOx-ZrO2, MnOx-ZrO2-CeO2 oxides with the Mn/(Zr + Ce + Mn) molar ratio of 0.3 were synthesized by coprecipitation method followed by calcination in the temperature range of 400–800 °C and characterized by XRD, N2 adsorption, TPR, TEM, and EPR. The catalytic activity was tested in the CO oxidation reaction. It was found that MnOx-CeO2, MnOx-ZrO2-CeO2, MnOx-ZrO2 catalysts, calcined at 400–500 °C, 650–700 °C and 500–650 °C, respectively, show the highest catalytic activity in the reaction of CO oxidation. According to XRD and TEM results, thermal stability of catalysts is determined b

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8

Jeong, Gu Beom, Pyung Woo Shin, and Sun Ig Hong. "Effect of Scrap: Sponge Ratio on Mechanical and Corrosion Properties of Zr-1Nb-0.7Sn-0.1Fe Alloy." Advanced Materials Research 977 (June 2014): 94–98. http://dx.doi.org/10.4028/www.scientific.net/amr.977.94.

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In this study, the effect of scrap ratio on the mechanical and corrosion properties of Zr-1Nb-0.7Sn-0.1Fe alloy was studied. Oxygen content in the ingot cake increased rapidly with increasing fraction of scrap, which can be attributed to the surface oxide of scrap cake made of small pieces of turning, chips, etc. Iron content was not changed much, suggesting scrap materials was well reserved in the iron-free container. As-cast structure of Zr-1Nb-0.7Sn-0.1Fe alloy with the scrap:sponge ratio displayed basket-weave α phase and no appreciable change of the cast structure was observed with change

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9

Kaplin, Igor Yu, Ekaterina S. Lokteva, Artem V. Tikhonov, Konstantin I. Maslakov, Oksana Ya Isaikina, and Elena V. Golubina. "Copper–Cerium–Tin Oxide Catalysts for Preferential Oxidation of CO in Hydrogen: Effects of Synthesis Method and Copper Content." Catalysts 12, no. 12 (2022): 1575. http://dx.doi.org/10.3390/catal12121575.

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Copper was incorporated into the Ce-Sn and comparative Ce-Zr oxide supports by one-pot precipitation in the presence of CTAB template and by the impregnation of templated Ce-Sn and Ce-Zr oxides. The synthesized Cu-Ce-Sn and Cu-Ce-Zr catalysts were tested in the continuous-flow preferential oxidation of CO in hydrogen excess. The one-pot synthesized tin- and zirconium-doped catalysts demonstrated better CO conversion and CO2 selectivity than their impregnated counterparts. For the tin-modified ternary system that showed the best catalytic performance, the copper content was further optimized. T

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10

Sytchenko, Alina D., Pavel A. Loginov, Alla V. Nozhkina, Evgeny A. Levashov, and Philipp V. Kiryukhantsev-Korneev. "Structure and Oxidation Resistance of Mo-Y-Zr-Si-B Coatings Deposited by DCMS and HIPIMS Methods Using Mosaic Targets." Journal of Composites Science 7, no. 5 (2023): 185. http://dx.doi.org/10.3390/jcs7050185.

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In this study, Mo-(Y,Zr)-Si-B coatings were obtained by direct current magnetron sputtering (DCMS) and high-power impulse magnetron sputtering (HIPIMS) using mosaic targets. The results showed that the addition of Y and Zr into the composition of Mo-Si-B coatings led to the suppression of columnar grain growth, a decrease in the crystallite size of h-MoSi2 phase from ~50 to ~5 nm, and an increase in the amorphous to crystalline phases ratio Doping of the Mo-Si-B coating with Y and Zr promoted an increase in oxidation resistance at a temperature of 1000 °C. The introduction of yttrium into the

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11

Kundozerova, Tatyana, and Genrikch Stefanovich. "Resistance Switching in Metal Oxide Thin Films and its Memory Application." Applied Mechanics and Materials 346 (August 2013): 29–34. http://dx.doi.org/10.4028/www.scientific.net/amm.346.29.

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We explore the unipolar resistance switching effect in sandwich structures based on Nb, Ta and Zr oxide thin films. The structures were fabricated by pulsed laser deposition and low temperature anodic oxidation methods. After electroforming process memory cells demonstrate reproducible switching between low and high resistance states with a resistance ratio around 102. Nonvolatile resistance storage was traced within 40 days. The low-temperature anodic oxidation of Nb was found to be suitable to fabricate flexible nonvolatile memory elements. The parameters of resistive switching are not degra

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12

Camposeco, Roberto, Viridiana Maturano-Rojas, and Rodolfo Zanella. "Highly Efficient Au/ZnO−ZrO2 Catalysts for CO Oxidation at Low Temperature." Catalysts 13, no. 3 (2023): 590. http://dx.doi.org/10.3390/catal13030590.

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A series of gold catalysts on ZnO−ZrO2 featuring nominal ZnO loads of 3, 5, and 10 wt. % were synthesized by the sol–gel method using Zn(NO3)2 and zirconium (IV) propoxide aqueous solutions. In addition, gold catalysts with nominal loads between 1 and 3 wt. % were produced by the method of deposition-precipitation with urea, and their performance in the CO oxidation reaction at low temperature was evaluated. HRTEM outcomes revealed high gold dispersion on the 3Au/5ZnO−ZrO2 catalyst with Zn/Zr atomic ratio of (5/95) and 3 wt. % of gold, which showed the highest CO conversion at low temperature

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13

Sato, Nobuaki, Akira Krishima, and Takayuki Sasaki. "Behavior of Fuel and Structural Materials in Severely Damaged Reactors." Advances in Science and Technology 94 (October 2014): 93–96. http://dx.doi.org/10.4028/www.scientific.net/ast.94.93.

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To study the fuel debris treatment at Fukushima Daiichi NPP, information on the behaviour of fuel and structural materials in severely damaged reactors, i.e., oxides and metals of uranium and zirconium is essential. Since sea water was introduced to the reactors, situation of fuel debris became different from that for TMI case. In this paper, phase relations of uranium and zirconium oxides were analyzed by powder XRD method at high temperatures. By the heat-treatment of the mixture of UO2 and ZrO2 (U:Zr=1:1) under 10 torr air, UO2 was oxidized to U3O8 over 800 oC, The UO2 like phase appeared a

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14

Hattori, Masatomo, Masaaki Haneda, and Masakuni Ozawa. "Influence of Ce/Zr ratio on CO oxidation activity of ceria–zirconia supported Cu catalyst." Japanese Journal of Applied Physics 55, no. 1S (2015): 01AE05. http://dx.doi.org/10.7567/jjap.55.01ae05.

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15

Zazhigalov, V. O., and O. V. Kiziun. "The obtaining of the anhydride products by oxidation of n-pentane on the VPO catalysts." Catalysis and petrochemistry, no. 30 (2020): 19–37. http://dx.doi.org/10.15407/kataliz2020.30.019.

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It was investigated VPMeO catalysts (Me=Fe, Mo, Te, W, Ni, Ti, La, Bi, Zr і Ag) in oxidation of n-pentane. On these catalytic samples the main products of reaction are maleic (MA), phthalic (PhA), citraconic (CA) anhydrides, carbon oxides and in-significant quantity of acetic and of acrylic acids. It was established that a change of physical-chemical properties of the VPMeO catalysts affects a course of reaction of n-pentane oxidation. It was determined that the introduction of additives into the basic VPO composition and its content influences a phase composition, a morphol-ogy, acidic proper

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16

Shakshooki, S. K., F. A. El-Akari, and Najat A. Abozaid. "Synthesis and Characterization of Novel -Type Zirconium Phosphate-Crystalline Cerium Phosphate/ Polyaniline, Polyindole, Polycarbazole, Polyaniline-co-Polyindole, and Polyaniline-co-Polycarbazole Composites." Academic Journal of Chemistry, no. 62 (May 30, 2021): 45–59. http://dx.doi.org/10.32861/ajc.62.45.59.

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-Type zirconium phosphate,-Zr(HPO4)2-.1.77H2O (-ZrP), crystalline cerium phosphate, Ce(HPO4)2.1.33 H2O (CePc), and [-Zr(HPO4)2]0.30 [Ce (HPO4)2]0.70 .2H2O composite were prepared and characterized by chemical, XRD, TGA, FT-IR and scanning electron microscopy(SEM). [-Zr(HPO4)2]0.30[Ce(HPO4)2]0.70/polyaniline, polyindole, polycarbazole, polyaniline-co-polyindole, polyaniline-co-polycarbazole composites were prepared via in-situ chemical oxidation of the monomers aniline, indole , carbazole, and (1:1moler ratio) of co-monomers aniline-indole, aniline- carbazole, respectively, that was promoted by

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17

Silva, P. P., F. A. Silva, L. S. Portela, L. V. Mattos, F. B. Noronha, and C. E. Hori. "Effect of Ce/Zr ratio on the performance of Pt/CeZrO2/Al2O3 catalysts for methane partial oxidation." Catalysis Today 107-108 (October 2005): 734–40. http://dx.doi.org/10.1016/j.cattod.2005.07.004.

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18

GONG, You-jing, Ren-guang HE, Guang-lei ZHAO, et al. "Effect of Pr/Zr atomic ratio on the activity of catalytic oxidation denitration of Pr Zr1−O2−." Journal of Fuel Chemistry and Technology 51, no. 7 (2023): 996–1005. http://dx.doi.org/10.1016/s1872-5813(23)60341-x.

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19

Gil-Calvo, Miryam, Cristina Jiménez-González, Rivas Martín Beatriz de, Jose Ignacio Gutierrez-Ortiz, and Ruben Lopez-Fonseca. "Novel nickel aluminate-derived catalysts supported on ceria and ceria-zirconia for partial oxidation of methane." Industrial and Engineering Chemistry Research 56, no. 21 (2017): 6186–97. https://doi.org/10.1021/acs.iecr.7b00986.

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In this work novel nickel catalysts based on nickel aluminate deposited on ceria-based supports (CeO<sub>2</sub> and Ce<sub>0.13</sub>Zr<sub>0.87</sub>O<sub>2</sub>) were investigated for the partial oxidation of methane. The good catalytic behaviour of the CeO<sub>2</sub>-based sample under moderate (38400 mL CH<sub>4</sub> g<sup>-1</sup> h<sup>-1</sup> and stoichiometric feed) and severe (60000 mL CH<sub>4</sub> g<sup>-1</sup> h<sup>-1</sup>, an O/C molar ratio of 0.8 and prolonged time on stream (30 h)) reaction conditions was mainly assigne

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20

Slobodyan, Mikhail, Konstantin Ivanov, Maxim Elkin, et al. "Technical Note: Effect of High-Current Pulsed Electron Beam Processing of Zr-1%Nb Alloy on Its Oxidation Kinetics at 1,200°C in Air and Steam." Corrosion 78, no. 2 (2021): 163–67. http://dx.doi.org/10.5006/3942.

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The paper reports the effect of high-current pulsed electron beam (HCPEB) processing of the Zr-1%Nb alloy as one of the most widely used in water-cooled nuclear reactors, based on the kinetics of its oxidation at 1,200°C in air and steam (these conditions are typical for potential loss-of-coolant accidents). It was shown that HCPEB processing caused a change in the surface morphology of the samples. In particular, craters with diameters of about 100 μm were found on the modified surfaces. They had initiated at an energy density of 5 J/cm2 and were characterized by relevant reliefs with microcr

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21

Tsoncheva, Tanya, Gloria Issa, Radostina Ivanova, et al. "Design Control of Copper-Doped Titania–Zirconia Catalysts for Methanol Decomposition and Total Oxidation of Ethyl Acetate." Symmetry 14, no. 4 (2022): 751. http://dx.doi.org/10.3390/sym14040751.

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This study is focused on the design control of Cu–Zr–Ti oxide composites by the variation of the Zr/Ti ratio and the copper deposition procedure used. For the first time, these ternary composites were obtained by a combination of template-assisted hydrothermal techniques for the preparation of mesoporous ZrO2–TiO2 mixed oxides with diverse compositions, followed by the consecutive chemisorption and hydrolysis of copper ammonia complexes on them. The nitrogen physisorption, XRD, SEM, HRTEM, TPR, XPS, UV-Vis, and Raman spectroscopies were applied for the catalysts’ characterization. Methanol dec

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22

Wang, Ruotian, Rongxiang Wang, and Yongqiang Jia. "Effects of Gd/Nd Ratio and Aging Treatment on Wear Behavior of Mg-Nd-Gd-Sr-Zn-Zr Alloys." Coatings 14, no. 1 (2023): 7. http://dx.doi.org/10.3390/coatings14010007.

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The Mg-(4-x)Nd-xGd-0.3Sr-0.2Zn-0.4Zr (x = 0, 1, 2, and 3 wt%, Gd/Nd = 0, 1/3, 1, and 3) alloys were hot extruded and then aged (T5). The friction and wear properties of the as-extruded and as-aged alloys were studied using a ball-on-disk wear testing machine and a scanning electron microscope to reveal the impacts of the Gd/Nd ratio and aging treatment. The results show that the friction coefficient of the as-extruded alloys increases first and then decreases with increasing Gd/Nd ratio. After aging, the friction coefficient of the alloys decreases slightly. The Gd/Nd ratio has no significant

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23

Guo, Bin, Liqing Yang, Weijie Hu, Wenlong Li, and Haojing Wang. "Effect of nano-sized cerium–zirconium oxide solid solution on far-infrared emission properties of tourmaline powders." Modern Physics Letters B 29, no. 30 (2015): 1550183. http://dx.doi.org/10.1142/s0217984915501833.

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Far-infrared functional nanocomposites were prepared by the co-precipitation method using natural tourmaline [Formula: see text], where [Formula: see text] is [Formula: see text], [Formula: see text], [Formula: see text], or vacancy; [Formula: see text] is [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], or [Formula: see text]; [Formula: see text] is [Formula: see text], [Formula: see text], [Formula: see text], or [Formula: see text]; [Formula: see text] is [Formula: see text

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24

Peng, Hao-En, Ching-Yin Lee, Hsin-Yi Chang, and Jien-Wei Yeh. "Effect of Substrate Bias on the Microstructure and Properties of Non-Equimolar (AlCrSiTiZr)N Films with Different Cr/Zr Ratios Deposited Using Reactive Direct Current Magnetron Sputtering." Coatings 13, no. 12 (2023): 1985. http://dx.doi.org/10.3390/coatings13121985.

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To reduce the cost of tools operated in extreme environments, we developed films with excellent corrosion/oxidation resistance. Two high-entropy nitride films, (AlCrSi0.3TiZr)N and (AlCr1.5Si0.3TiZr0.5)N, were deposited using reactive DC magnetron sputtering under different substrate biases. The films exhibited a maximum hardness of 32.5 GPa ((AlCrSi0.3TiZr)N) and 35.3 GPa ((AlCr1.5Si0.3TiZr0.5)N) when deposited at −150 V, corresponding to 27 and 142% increases compared to those deposited at 0 V. This indicates that the bias strengthened (AlCr1.5Si0.3TiZr0.5)N (higher Cr/Zr ratio) more signifi

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25

Jafarul Tarek, Ahmad Hafiz, Tahsin Ahmed Mozaffor Onik, Chin Wei Lai, Bushroa Abdul Razak, Chia Ching Kee, and Yew Hoong Wong. "Properties of Bilayer Zr- and Sm-Oxide Gate Dielectric on 4H-SiC Substrate Under Varying Nitrogen and Oxygen Concentrations." Ceramics 8, no. 2 (2025): 49. https://doi.org/10.3390/ceramics8020049.

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This work systematically analyses the electrical and structural properties of a bilayer gate dielectric composed of Sm2O3 and ZrO2 on a 4H-SiC substrate. The bilayer thin film was fabricated using a sputtering process, followed by a dry oxidation step with an adjusted oxygen-to-nitrogen (O2:N2) gas concentration ratio. XRD analysis validated formation of an amorphous structure with a monoclinic phase for both Sm2O3 and ZrO2 dielectric thin films. High-resolution transmission emission (HRTEM) analysis verified the cross-section of fabricated stacking layers, confirmed physical oxide thickness a

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26

Fei, Zhaoyang, Xingxing Xie, Yong Dai, et al. "HCl Oxidation for Sustainable Cl2 Recycle over the CexZr1–xO2 Catalysts: Effects of Ce/Zr Ratio on Activity and Stability." Industrial & Engineering Chemistry Research 53, no. 50 (2014): 19438–45. http://dx.doi.org/10.1021/ie503297k.

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Zhao, Jing, Ming Qiao Zhu, Jia Jing Chen, et al. "Cyclohexane Oxidation Catalyzed by Au/MxOyAl₂O₃ Using Molecular Oxygen." Advanced Materials Research 233-235 (May 2011): 254–59. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.254.

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Alumina was modified by doping with metal oxide and then used as the support for depositing gold by an impregnation-ammonia washing method to obtain Au/MxOy/Al2O3(M=Co, Zr and Ce) catalysts. These samples were characterized by inductively coupled plasma-atomic emission spectrometry (ICP-AES), transmission electron microscope (TEM) and X-ray diffraction (XRD). The effects of Co3O4content, metal oxide and mixed metal oxides on the catalytic activity for the selective oxidation of cyclohexane to cyclohexanone and cyclohexanol using molecular oxygen as oxidant were studied. The results showed that

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Cecilia, Juan, M. Soriano, Alejandro Natoli, Enrique Rodríguez-Castellón, and José López Nieto. "Selective Oxidation of Hydrogen Sulfide to Sulfur Using Vanadium Oxide Supported on Porous Clay Heterostructures (PCHs) Formed by Pillars Silica, Silica-Zirconia or Silica-Titania." Materials 11, no. 9 (2018): 1562. http://dx.doi.org/10.3390/ma11091562.

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Vanadium oxide (V2O5) species has been supported on different porous clay heterostructures (with silica pillars, silica-zirconia with a molar ratio Si/Zr = 5 and silica-titania with a molar ratio Si/Ti = 5) by wetness incipient method. All catalysts were characterized by X-ray diffraction (XRD), N2 adsorption-desorption at −196 °C, NH3 thermoprogrammed desorption (NH3-TPD), Raman spectroscopy, diffuse reflectance UV-Vis and X-ray photoelectron spectroscopy (XPS). After that, the catalytic activity of the vanadium-based catalysts was evaluated in the selective oxidation of H2S to elemental sulf

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Wei, Ning, Jia Zhang, Hexiang Zhong, et al. "Methane Steam Reforming Over NiO/CexZryO2-Sil-1 Catalyst Prepared by In-Situ Self-Assembly." Journal of Nanoscience and Nanotechnology 19, no. 11 (2019): 7416–20. http://dx.doi.org/10.1166/jnn.2019.16620.

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NiO/CexZryO2-Sil-1 catalysts were prepared using an In-Situ self-assembly approach by coupling silicalite-1 and CexZryO2. This one-step synthesis method utilized the high surface area and hydrothermal stability of silicalite-1 and the good oxidation-reduction ability of the CexZryO2, and hence offered high synthesis efficiency. The catalyst structure was examined by N2-physisorption, temperature-programmed reduction, transmission electron microscopy, and X-ray diffraction. All the results showed that silicalite-1 was well-encapsulated by NiO/Ce0.5Zr0.5O2. Furthermore, the effect of the Ce/Zr m

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Martiz, Alejandro, Zoltán Károly, Laura Bereczki, et al. "Carbonization of Zr-Loaded Thiourea-Functionalized Styrene-Divinylbenzene Copolymers: An Easy Way to Synthesize Nano-ZrO2@C and Nano-(ZrC, ZrO2)@C Composites." Journal of Composites Science 7, no. 8 (2023): 306. http://dx.doi.org/10.3390/jcs7080306.

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Thermal processing of Zr-loaded ion-exchangers is a facile route to synthetize (ZrO2, ZrC)@C composites. In the present paper, furnace and RF-thermal plasma processing of ZrOCl2 loaded thiourea-functionalized styrene-divinylbenzene copolymer was investigated and led to composites containing ZrO2 and ZrC. Different ZrO2@C composites were formed between 1000 and 1400 °C in 2 h, whereas the composite containing ZrC was created at 1400 °C in 8 h. The ratio of ZrO2/ZrC, the prevailing ZrO2 modifications, and the crystallite sizes strongly depend on the synthesis conditions. The ZrC-containing compo

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Zhu, Han, Haiyong Liu, Feng Huang, Jun Yi, and Fangfang Ge. "Effect of Cr/Al Atomic Ratio on the Oxidation Resistance in 1200°C Steam for the CrAlSiN Coatings Deposited on Zr Alloy Substrates." JOM 71, no. 12 (2019): 4839–47. http://dx.doi.org/10.1007/s11837-019-03839-4.

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Bachchhav, Bhanudas D., Shrikant V. Chaitanya, Sachin Salunkhe, Palanisamy Chandrakumar, Marek Pagáč, and Emad Abouel Nasr. "Wear Performance of Cu–Cd, Cu–Be and Cu–Cr–Zr Spot Welding Electrode Materials." Lubricants 11, no. 7 (2023): 291. http://dx.doi.org/10.3390/lubricants11070291.

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Heating of the electrode at the work–piece interface zone in spot welding, leading to degradation of the tip, becomes a significant concern in the high-volume production automotive industry. By recognizing the interrelationship between hardness, wear resistance, and thermal conductivity, the authors emphasize the importance of selecting electrode materials with suitable alloying elements desirable for achieving optimal performance in spot welding applications. This paper studies the wear behaviour of three types of spot-welding electrode materials under dry sliding contact conditions. A pin-on

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33

Unger, Aaron, Sayandev Chatterjee, and Nicole Byrne. "Terrapower’s Molten Chloride Fast Reactor (MCFR): Advancements in Electrochemical Monitoring and Control." ECS Meeting Abstracts MA2024-02, no. 57 (2024): 3876. https://doi.org/10.1149/ma2024-02573876mtgabs.

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TerraPower’s Molten Chloride Fast Reactor (MCFR) project is pioneering a nuclear reactor technology that leverages fast spectrum chloride as a fuel salt and chloride salts as coolant salts, offering vast potential for decarbonizing various economic sectors. The fast spectrum enhances the neutron economy, mitigating fission product poisoning. Utilizing a NaCl-UCl3 binary eutectic as the fuel salt, the reactor undergoes significant chemical transformations during burn-up. The resulting species from the fission process, including Kr(0), Xe(0), Rb(I), Cs(I), Sr(II), Ba(II), Zr(II), Nb(0), Mo(0), T

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34

Goyal, Sonam, Maizatul Shima Shaharun, Ganaga Suriya Jayabal, Chong Fai Kait, Bawadi Abdullah, and Lim Jun Wei. "Photocatalytic Reduction of CO2 to Methanol Using a Copper-Zirconia Imidazolate Framework." Catalysts 11, no. 3 (2021): 346. http://dx.doi.org/10.3390/catal11030346.

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A set of novel photocatalysts, i.e., copper-zirconia imidazolate (CuZrIm) frameworks, were synthesized using different zirconia molar ratios (i.e., 0.5, 1, and 1.5 mmol). The photoreduction process of CO2 to methanol in a continuous-flow stirred photoreactor at pressure and temperature of 1 atm and 25 °C, respectively, was studied. The physicochemical properties of the synthesized catalysts were studied using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and photoluminescence (PL) spectroscopy. The highest methanol activity of 818.59 µmol/L.g was recorded when the CuZrIm1 ca

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35

Gorbunov, A. V., V. A. Gorbunova, O. G. Devoino, G. Petraconi Filho, and A. A. Halinouski. "Evaluation of Evaporative Degradation of Arc Torch Cathodes in Hydrocarbon-Containing Plasmas for Spraying, Thermal Protection Testing and Related Technologies." Science & Technique 21, no. 3 (2022): 179–90. http://dx.doi.org/10.21122/2227-1031-2022-21-3-179-190.

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Design of non-transferred DC electric arc plasma torches (EAPTs) operated with plasma gases containing alkane hydrocarbons, as a promising type of heaters for a number of technologies (thermal spraying, surface hardening, testing of thermal protection systems, etc.), requires taking into account the evaporation rate of surface cathode material (as one of the channels of its ablative degradation). For this procedure, as the first stage, thermodynamic methods can be used to simulate the composition and properties of reactive C–H–O–N–Ar–Me-systems with variable set of such input parameters as the

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Wu, Gang, Ke Tang, Deng Wu, Yuelin Li, and Yuqiang Li. "Experimental Evaluation on the Catalytic Activity of a Novel CeZrK/rGO Nanocomposite for Soot Oxidation in Catalyzed Diesel Particulate Filter." Processes 9, no. 4 (2021): 674. http://dx.doi.org/10.3390/pr9040674.

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A nanostructured solid solution catalyst CeZrK/rGO for soot oxidation in catalyzed diesel particulate filter was synthesized using the dipping method. The reduced graphene oxide (rGO) was used as the catalyst carrier, and CeO2, ZrO2, and K2O were mixed with the molar ratio of 5:1:1, 5:2:2 and 5:3:3, which were referred to as Ce5Zr1K1/rGO, Ce5Zr2K2/rGO, and Ce5Zr3K3/rGO, respectively. The structure, morphology and catalytic activity of the CeZrK/rGO nanocomposites were thoroughly investigated and the results show that the CeZrK/rGO nanocomposites have nanoscale pore structure (36.1–36.9 nm), hi

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Song, Wenchen, Xu Chen, Yanhong Jia, Mingshuai Yang, Guoan Ye, and Fuxing Zhu. "Preparation of Metallic Zr from ZrO2 via Carbothermal and Electrochemical Reduction in Molten Salts." Materials 18, no. 11 (2025): 2634. https://doi.org/10.3390/ma18112634.

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Zirconium, a critical rare metal with exceptional corrosion resistance and nuclear applications, is conventionally produced via the energy-intensive Kroll process. The electrolysis of ZrCxOy soluble anodes has been extensively investigated due to its advantages in having a short process flow and resulting in high-quality products. In particular, during the electrolysis of zirconium oxycarbide with a C:O molar ratio of 1:1, gaseous CO can be released, and no residual anodes are generated, which is extremely appealing. In this regard, this paper explores the feasibility of preparing zirconium me

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Sulym, Iryna, Olena Goncharuk, Dariusz Sternik, et al. "Silica-Supported Titania–Zirconia Nanocomposites: Structural and Morphological Characteristics in Different Media." Nanoscale Research Letters 11, no. 1 (2016): 111. https://doi.org/10.1186/s11671-016-1304-1.

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A series of TiO<sub>2</sub>–ZrO<sub>2</sub>/SiO<sub>2</sub> nanocomposites were synthesized using a liquid-phase method and characterized by various techniques, namely, nitrogen adsorption–desorption, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, high-resolution transmission electron microscopy, and photon correlation spectroscopy (PCS). It was revealed that the component ratio and calcination temperature affect the phase composition of nanocomposites. Composites TiZrSi1 (TiO<sub>2</sub>:ZrO<sub>2</sub>:SiO<sub>2</sub> = 3:10:87) and TiZrSi2 (10:10:80) ca

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Ruan, Renhui, Wenjing Ma, Guan Wang, et al. "Combustion characteristics and migration behavior of nuclides during incineration of low-level radioactive waste." Thermal Science, no. 00 (2023): 162. http://dx.doi.org/10.2298/tsci230212162r.

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Incineration is a main method of disposal low-level radioactive waste (LLRW). However, the combustion characteristics and migration of nuclides during incineration is still unclear. This study first investigated the effect of package mass, feeding time interval, air distribution, and water vapor supply on the combustion characteristics of LLRW and NOx emission. Optimal parameters were obtained based on combustion efficiency and NOx concentration. Then, the migration of nuclides was studied in conditions with the optimal parameters. The results showed that the combustion efficiency and NOx conc

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Yakovlev, Ilya, Serguei Tikhov, Evgeny Gerasimov, et al. "Formation of Metal-Oxide Nanocomposites with Highly Dispersed Co Particles from a Co-Zr Powder Blend by Mechanical Alloying and Hydrogen Treatment." Materials 16, no. 3 (2023): 1074. http://dx.doi.org/10.3390/ma16031074.

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The use of metal powders produced by mechanical treatment in various fields, such as catalysis or gas absorption, is often limited by the low specific surface area of the resulting particles. One of the possible solutions for increasing the particle fineness is hydrogen treatment; however, its effect on the structure of mechanically treated powders remains unexplored. In this work, for the first time, a metal-oxide nanocomposite powder was produced by mechanical alloying (MA) in a high-energy planetary ball mill from commercial powders of Zr and Co in the atomic ratio Co:Zr = 53:47 in an inert

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Omata, Takahisa, Haruo Kishimoto, Shinya Otsuka-Yao-Matsuo, Norikazu Ohtori, and Norimasa Umesaki. "Vibrational Spectroscopic and X-Ray Diffraction Studies of Cerium Zirconium Oxides with Ce/Zr Composition Ratio=1 Prepared by Reduction and Successive Oxidation of t′-(Ce0.5Zr0.5)O2 Phase." Journal of Solid State Chemistry 147, no. 2 (1999): 573–83. http://dx.doi.org/10.1006/jssc.1999.8420.

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Kim, Do-Hyeon, and Jun-Yeop Lee. "Prediction of the Adsorption Behaviors of Radionuclides onto Bentonites Using a Machine Learning Method." Minerals 12, no. 10 (2022): 1207. http://dx.doi.org/10.3390/min12101207.

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This study builds a model to predict distribution coefficients (Kd) using the random forest (RF) method and a machine learning model based on the Japan Atomic Energy Agency Sorption Database (JAEA-SDB). A database of ten input variables, including the distribution coefficient, pH, initial radionuclide concentrations, solid–liquid ratio, ionic strength, oxidation number, cation exchange capacity, surface area, electronegativity, and ionic radius, was constructed and used for the RF model calculation. The calculation parameters employed in this work included two different hyperparameters, the nu

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43

Zheng, Yulin, Changqing Zhang, Fudong Jia, Huan Liu, and Qinggao Yan. "Apatite and Zircon Geochemistry in Yao’an Alkali-Rich Porphyry Gold Deposit, Southwest China: Implications for Petrogenesis and Mineralization." Minerals 11, no. 11 (2021): 1293. http://dx.doi.org/10.3390/min11111293.

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The Yao’an gold deposit is located in the middle of the Jinshajiang-Ailaoshan alkali-rich metallogenic belt, and this belt hosts many porphyry-type Cu-Au-Mo deposits formed at 46–33 Ma. Yao’an porphyry gold-mineralization is intimately associated with biotite syenite porphyry, whereas the contemporaneous quartz syenite porphyry is barren. In this study, we compared the major and trace elements of apatite and zircon and isotopic compositions of zircon from the biotite syenite porphyry and quartz syenite porphyry, to explore their geochemical differences that may affect their mineralization pote

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Vazquez, M. I. Sosa, J. Salinas Gutierrez, D. Delgado Vigil, V. Collins-Martinez, and A. Lopez Ortiz. "Synthesis Gas Production by Methane Partial Oxidation on Ni/Fe₃O₄-Ce_0.75Zr_0.25O₂ Catalysts: Kinetic Study." Journal of New Materials for Electrochemical Systems 14, no. 2 (2011): 133–39. http://dx.doi.org/10.14447/jnmes.v14i2.122.

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Fe3O4-Ce0.75Zr0.25O2 (FeCZ) is an oxygen carrier material aimed to produce syngas through methane partial oxidation in absence of oxygen gas feed. The objective of the present research is to study the catalytic effect of Ni on FeCZ using an evaluation of the global kinetics (activation energy, reaction rate, order and constant) of its reaction with methane for syngas production. FeCZ and 0.05NiFeCZ (Ni/Fe = 0.05 molar ratio) were synthesized through co-precipitation of their precursor nitrate salts, while 2NiFeCZ was prepared by impregnation of FeCZ with a nickel nitrate solution to obtain a 2

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45

MIKHAILOVSKAYA, T. P., R. KURMAKYZY, D. K. TOLEMISOVA, and K. A. KADIRBEKOV. "OXIDATIVE AMMONOLYSIS OF 4-METHYLPYRIDINE ON OXIDE VANADIUM-TITANIUM-ZIRCONIUM CATALYST MODIFIED BY TIN AND TUNGSTEN OXIDES." Chemical Journal of Kazakhstan 73, no. 1 (2021): 196–203. http://dx.doi.org/10.51580/2021-1/2710-1185.21.

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Catalysts based on vanadium pentoxide modified by Ti, Sn, Zr and W oxides were tested in the oxidative ammonolysis of 4-methylpyridine. The role of the main process parameters such as temperature, the ratio of the initial components in the conversion of the methyl group to the nitrile one, and the optimal conditions for the oxidative ammonolysis of 4-methylpyridine were determined. It is determined that the V-Ti-Zr-O-catalyst and the sample containing 9% of tungsten oxide are superior in catalytic activity to the V-Ti-Zr-Sn-O contact. Conditions that ensure a high selectivity for the formation

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46

Liu, Heng-Jui, Yi-Chen Ye, and Yun-Wei Tsai. "Leveraging Functional High-Entropy Oxide Perovskites for Enhanced Piezocatalytic Degradation." ECS Meeting Abstracts MA2024-02, no. 39 (2024): 2606. https://doi.org/10.1149/ma2024-02392606mtgabs.

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The escalating prevalence of water scarcity resulting from extreme climate events highlights a critical global challenge. This scarcity emphasizes the need for wastewater recycling, emphasizing the pivotal role of the water cycle in sustaining life and ecosystems. Among various wastewater treatment processes, chemical methods stand out for their high pollutant removal efficiency, scalability, and versatility in addressing diverse wastewater types. Advanced Oxidation Processes (AOPs) are particularly favored due to their low energy consumption, minimal equipment requirements, and superior remed

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Yan, Hui, Xiaoli Liu, Hao Ding, Zhiguang Dai, Xiaoli Niu, and Long Zhao. "Hormonal Balance, Photosynthesis, and Redox Reactions in the Leaves of Caragana korshinskii Kom. under Water Deficit." Plants 12, no. 11 (2023): 2076. http://dx.doi.org/10.3390/plants12112076.

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To evaluate the physiological responses of Korshinsk peashrub (Caragana korshinskii Kom.) to water deficit, photosynthetic gas exchange, chlorophyll fluorescence, and the levels of superoxide anion (O2•−), hydrogen peroxide (H2O2), malondialdehyde (MDA), antioxidant enzymes, and endogenous hormones in its leaves were investigated under different irrigation strategies during the entire growth period. The results showed that leaf growth-promoting hormones were maintained at a higher level during the stages of leaf expansion and vigorous growth, and zeatin riboside (ZR) and gibberellic acid (GA)

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Garibov, Adil, Yadigar Jafarov, Gunel Imanova, Teymur Agayev, Sevinj Bashirova, and Anar Aliyev. "Mechanism of Hydrogen Production in The Processes of Radiation Heterogeneous Splitting of Water with the Presence of Nano-Metal and Nano-MeO." East European Journal of Physics, no. 1 (March 5, 2024): 460–75. http://dx.doi.org/10.26565/2312-4334-2024-1-51.

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In the study, the optimal values of the ratio of the distance between particles to the particle size in the radiation-heterogeneous radiolysis of water in nano-Me and nano-MeO systems were determined. In those systems, the effect of water density and system temperature on the radiation-chemical release of molecular hydrogen obtained from thermal and radiation-thermal decomposition of water was considered. The article also determined the effect of particle sizes and the type of sample taken on the radiation chemical yield of molecular hydrogen. In the presented article, the change of molecular

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Watanabe, Yuri, Koichi Matsuzawa, Ryuji Monden, Takaaki Nagai, and Akimitsu Ishihara. "Effects of Oxygen Defects in Zr Oxide-Based Thin Films on Oxygen Reduction Reaction in Acidic Media." ECS Meeting Abstracts MA2023-02, no. 40 (2023): 1955. http://dx.doi.org/10.1149/ma2023-02401955mtgabs.

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The use of carbon-supported platinum as cathode catalysts of polymer electrolyte fuel cells has some problems such as high cost and low amount of resources of platinum. Therefore, we have attempted to develop substitute of platinum based on group 4 metal oxides. In the case of Zr oxide-based powder catalysts, we found that zirconium oxide-based compounds with oxygen defects and deposited carbon derived from organometallic precursors had definite activity of oxygen reduction reaction (ORR) [1][2]. However, the ORR activities of these catalysts still remain low. In order to increase the ORR acti

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Ozawa, Nobuki, and Momoji Kubo. "Fracture of Ni/YSZ Porous Material Under Water Vapor Environment in SOFC Anode: Reactive Molecular Dynamics Simulation." ECS Meeting Abstracts MA2023-01, no. 54 (2023): 299. http://dx.doi.org/10.1149/ma2023-0154299mtgabs.

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In SOFC anodes, the concentration of water vapor in the hydrogen fuel increases when the hydrogen fuel supply is insufficient due to an accident. Here, when Ni/YSZ porous material is used for anodes, the high concentration of water vapor causes oxidation and volume expansion of Ni particles, leading to the destruction of the anode structure. To develop an anode material with high durability against such oxidation-induced fracture, it is necessary to elucidate the fracture process of Ni/YSZ porous materials due to the oxidation by water and the stress by the volume expansion of Ni particles. In

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