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Journal articles on the topic 'Oxidation of metals with oxygen'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

KIM, Seong-Gon. "Oxidation of Metals." Physics and High Technology 29, no. 7/8 (2020): 30–33. http://dx.doi.org/10.3938/phit.29.027.

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Oxides are formed on the surfaces of most metals we use today when they are exposed to an environment suitable for oxidation. The formation of these oxides usually has negative effects that cause severe corrosion problems detrimental to the operation of electronic devices, but it can also have positive effects in that a protective oxide layer that prevents further penetration of oxygen into the material may be formed. Therefore, understanding the effect of oxidation in metals plays an important role in the advancement of modern science and technology. In this paper, we will review the conventi

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2

Dyrssen, David, Helén Eskilsson, and Conny Haraldsson. "Chemical oxidation of amalgamated metals by oxygen." Journal of Electroanalytical Chemistry and Interfacial Electrochemistry 262, no. 1-2 (1989): 161–65. http://dx.doi.org/10.1016/0022-0728(89)80019-1.

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3

Silva, D. M. de, and S. D. Aust. "Ferritin and ceruloplasmin in oxidative damage: review and recent findings." Canadian Journal of Physiology and Pharmacology 71, no. 9 (1993): 715–20. http://dx.doi.org/10.1139/y93-107.

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The oxidation of biomolecules such as lipid, protein, and DNA is associated with a variety of toxicities and pathologies. In an all-encompassing definition these oxidative processes have been referred to as "oxidative stress." Although the direct reaction between molecular oxygen and most biomolecules is spin forbidden, this reaction can be efficiently catalyzed by transition metals such as iron and copper. Iron especially has been demonstrated to be a potent catalyst of biological oxidations. This review focuses on the relationship between iron and copper with respect to the copper protein ce

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Sevcikova, M., H. Modra, A. Slaninova, and Z. Svobodova. " Metals as a cause of oxidative stress in fish: a review." Veterinární Medicína 56, No. 11 (2011): 537–46. http://dx.doi.org/10.17221/4272-vetmed.

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This review summarizes the current knowledge on the contribution of metals to the development of oxidative stress in fish. Metals are important inducers of oxidative stress in aquatic organisms, promoting formation of reactive oxygen species through two mechanisms. Redox active metals generate reactive oxygen species through redox cycling, while metals without redox potential impair antioxidant defences, especially that of thiol-containing antioxidants and enzymes. Elevated levels of reactive oxygen species lead to oxidative damage including lipid peroxidation, protein and DNA oxidation, and e

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5

Hu, Zhewei, Jiaqi Shi, Hao Yang, Jianbo Huang, and Feng Sheng. "How Organic Substances Promote the Chemical Oxidative Degradation of Pollutants: A Mini Review." Sustainability 13, no. 19 (2021): 10993. http://dx.doi.org/10.3390/su131910993.

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The promotion of pollutant oxidation degradation efficiency by adding organic catalysts has obtained widespread attention in recent years. Studies have shown that organic substances promote the process of traditional oxidation reactions by accelerating the redox cycle of transition metals, chelating transition metals, activating oxidants directly to generate reactive oxygen species such as hydroxyl and sulfate radical, or changing the electron distribution of the target pollutant. Based on the promotion of typical organic functional groups on the chemical oxidative process, a metal-organic fra

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Ganiev, I. N., N. S. Olimov, B. B. Jabborov, and M. Ch Shirinov. "KINETICS OF OXIDATION OF Ca–Ge SYSTEM MELTS BY AIR OXYGEN." Расплавы, no. 2 (March 1, 2023): 156–66. http://dx.doi.org/10.31857/s0235010623020044.

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With the introduction of complex alloys and metals – reoxidizers into liquid steel, their waste is observed, or more precisely, oxidation by the gas phase of the furnace. To select the optimal composition of complex deoxidizers, it is necessary to know the physicochemical laws of this process, which are little studied. To study the kinetics of oxidation of metal melts, the method of continuous sample weighing is used, which is usually used in the study of high-temperature corrosion of solid metals. The mechanism of interaction of liquid metals with oxygen is similar in nature to high-temperatu

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Alov, Nikolai V. "Surface oxidation of metals by oxygen ion bombardment." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 256, no. 1 (2007): 337–40. http://dx.doi.org/10.1016/j.nimb.2006.12.023.

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8

Yang, J. C., M. Yeadon, B. Kolasa, and J. M. Gibson. "In Situ Uhv-Tem Oxidation And Reduction Of Metals." Microscopy and Microanalysis 5, S2 (1999): 132–33. http://dx.doi.org/10.1017/s1431927600013982.

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In this proceedings, we present a review of our experimental results of our investigations of the mechanisms of the initial stages of copper oxidation. We examined the initial stages of Cu(001) oxidation and reduction by in situ ultra-high vacuum (UHV) transmission, electron microscopy (TEM). We observed surface reconstruction and nucleation and growth of copper oxide islands. We have examined the oxidation processes from oxygen partial pressures of 10-5 torr to atmospheric pressures and temperatures from 25°C to 600°C, in order to gain fundamental insights into this important gas-metal reacti

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9

Fukumoto, Michihisa, Seiya Hara, and Hiroki Takahashi. "Oxidation Behavior of Pure Iron under Hydrogen Combustion Environment." Metals 13, no. 7 (2023): 1246. http://dx.doi.org/10.3390/met13071246.

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The environmental resistance of pure iron was evaluated by an oxygen and hydrogen sensor installed after an oxidation furnace. The amount of introduced oxygen was precisely controlled by the oxygen pump sensor at the front stage of the oxidation furnace, and the reaction with hydrogen was analyzed. Thus, when oxygen was supplied, a reaction between hydrogen and oxygen occurred; however, when the supplied oxygen was not sufficient, a hydrogen-vapor environment was created, and oxidation was not accelerated. Conversely, when the amount of supplied oxygen was excessive, the environment became an

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10

Masferrer-Rius, Eduard, and Robertus J. M. Klein Gebbink. "Non-Noble Metal Aromatic Oxidation Catalysis: From Metalloenzymes to Synthetic Complexes." Catalysts 13, no. 4 (2023): 773. http://dx.doi.org/10.3390/catal13040773.

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The development of selective aromatic oxidation catalysts based on non-noble metals has emerged over the last decades, mainly due to the importance of phenol products as intermediates for the generation of pharmaceuticals or functional polymers. In nature, metalloenzymes can perform a wide variety of oxidative processes using molecular oxygen, including arene oxidations. However, the implementation of such enzymes in the chemical industry remains challenging. In this context, chemists have tried to mimic nature and design synthetic non-noble metal catalysts inspired by these enzymes. This revi

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11

Sun, Guobin, Kay Crissman, Joel Norwood, Judy Richards, Ralph Slade, and Gary E. Hatch. "Oxidative interactions of synthetic lung epithelial lining fluid with metal-containing particulate matter." American Journal of Physiology-Lung Cellular and Molecular Physiology 281, no. 4 (2001): L807—L815. http://dx.doi.org/10.1152/ajplung.2001.281.4.l807.

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Epidemiology studies show association of morbidity and mortality with exposure to ambient air particulate matter (PM). Metals present in PM may catalyze oxidation of important lipids and proteins present in the lining of the respiratory tract. The present study investigated the PM-induced oxidation of human bronchoalveolar lavage (BAL) fluid (BALF) and synthetic lung epithelial lining fluid (sELF) through the measurement of oxygen incorporation and antioxidant depletion assays. Residual oil fly ash (ROFA), an emission source PM that contains ∼10% by weight of soluble transition metals, was add

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12

Timoshnikov, Viktor A., Lilia A. Kichigina, Olga Yu Selyutina, Nikolay E. Polyakov, and George J. Kontoghiorghes. "Antioxidant Activity of Deferasirox and Its Metal Complexes in Model Systems of Oxidative Damage: Comparison with Deferiprone." Molecules 26, no. 16 (2021): 5064. http://dx.doi.org/10.3390/molecules26165064.

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Deferasirox is an orally active, lipophilic iron chelating drug used on thousands of patients worldwide for the treatment of transfusional iron overload. The essential transition metals iron and copper are the primary catalysts of reactive oxygen species and oxidative damage in biological systems. The redox effects of deferasirox and its metal complexes with iron, copper and other metals are of pharmacological, toxicological, biological and physiological importance. Several molecular model systems of oxidative damage caused by iron and copper catalysis including the oxidation of ascorbic acid,

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13

Borma, Laura De Simone, Maurício Ehrlich, and Maria Cláudia Barbosa. "Acidification and release of heavy metals in dredged sediments." Canadian Geotechnical Journal 40, no. 6 (2003): 1154–63. http://dx.doi.org/10.1139/t03-062.

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The oxidation of iron sulphides in dredged sediments can be a source of long-term contamination of surface and underground water. The adverse effects are related to a decrease in the ability of soil to retain heavy metals, which is caused by acidification. Laboratory tests were conducted, and pH variations and consequent release of heavy metals, especially Zn, Cu, and Pb, into the solution were monitored over time. The rate of pyrite oxidation was determined based on the sulphate production rate, through the stoichiometry of the oxidation reaction. Samples of sediments from the Jacarepaguá lag

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14

Yuan, Geng, and Luis Ruiz Pestana. "The Effect of Surface Oxygen Coverage on the Oxygen Evolution Reaction over a CoFeNiCr High-Entropy Alloy." Nanomaterials 14, no. 12 (2024): 1058. http://dx.doi.org/10.3390/nano14121058.

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Developing cost-effective and highly active electrocatalysts for the oxygen evolution reaction (OER) is crucial for advancing sustainable energy applications. High-entropy alloys (HEAs) made from earth-abundant transition metals, thanks to their remarkable stability and electrocatalytic performance, provide a promising alternative to expensive electrocatalysts typically derived from noble metals. While pristine HEA surfaces have been theoretically investigated, and the effect of oxygen coverage on conventional metal electrocatalysts has been examined, the impact of surface oxygen coverage on t

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15

Mukhamedzyanov, Rinat, Zufar Muzipov, The Son Pham, Elina Vasilyeva, and Raisa Akhmedyanova. "Activity of Manganese Carboxylates in the Process of Liquid-Phase Oxidation of Ethylbenzene with Atmospheric Oxygen." Key Engineering Materials 899 (September 8, 2021): 215–19. http://dx.doi.org/10.4028/www.scientific.net/kem.899.215.

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The process of oxidation of hydrocarbon with oxygen proceeds with formation of the corresponding hydroperoxide as the primary product [1,2]. A catalyst is the most important factor that influences on the direction of flow of the oxidation reaction. Catalysts based on metals of variable valency, and their derivatives are the most active in reactions of oxidation of hydrocarbon [3].

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16

Phasha, Zanele Helen, Mamookho Elizabeth Makhatha, Donald Mkhonto, and Maje Phasha. "Theoretical study on corrosion behaviour of titanium metal alloyed with precious metals." MATEC Web of Conferences 406 (2024): 02006. https://doi.org/10.1051/matecconf/202440602006.

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This study investigated the role of valence electron orbital filling ( e/a ratio) on the reported corrosion resistance performance of Ti-Pt and Ti- Au binary alloys containing less than 10 atomic percent (at. %) precious metal. The valence electron orbital filling enabled us to determine the oxidation states of these binary Ti alloys, and thus establish a correlation with corresponding corrosion performance. It is known from literature that high oxidation state results in high oxygen to metal coverage, i.e., a very stable metal-oxide layer with high oxygen to metal ratio is formed.

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17

Davison, Allan J., Qizhuan Wu, Jim Moon, and Arnold Stern. "Among a range of transition metals and ligands vanadium∙desferroxamine excels in accelerating reactivity of ferrocytochrome c toward molecular oxygen." Biochemistry and Cell Biology 72, no. 5-6 (1994): 169–74. http://dx.doi.org/10.1139/o94-025.

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Despite early knowledge of the requirement for metals in the reactions of ferrocytochrome c with oxygen, the relative effectiveness of metals and the factors that modulate effectiveness remain unknown. We have compared the catalytic power of five metals and report the effects of pH and ligand on their effectiveness as catalysts. Catalysis by metal ions was greatest at higher pH, where the rate of aerobic oxidation was lowest. Iron (Fe2+), copper (Cu2+), vanadium(V) (V(V)), manganese (Mn2+), and aluminum (Al3+) were tested in combination with EDTA, ADP, histidine, or desferrioxamine (Des) at pH

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18

Elberling, B., R. V. Nicholson, and D. J. David. "Field Evaluation of Sulphide Oxidation Rates." Hydrology Research 24, no. 5 (1993): 323–38. http://dx.doi.org/10.2166/nh.1993.11.

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The generation of acidic waters and the release of dissolved metals from inactive sulphide mine-tailings disposal is a well-known environmental problem. The flux of oxygen across the surface of the tailings was determined under different physically-controlled environmental conditions and related to the oxidation rate of pyrrhotite mine-tailings. This work was conducted to verify, i) the consistency in oxygen flux rate measurements in the field within small areas and, ii) the importance of moist layers near the ground surface in the control of the oxygen flux. The flux of oxygen across the surf

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19

May, Bonnie L., Henry Yee, and Donald G. Lee. "Oxygen transfer reactions. 2. A comparison of the reactions of ruthenium tetroxide, chromyl chloride, and permanganate with thianthrene 5-oxide." Canadian Journal of Chemistry 72, no. 11 (1994): 2249–54. http://dx.doi.org/10.1139/v94-286.

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Products obtained from the oxidation of thianthrene 5-oxide, SSO, have been used to compare oxygen transfer mechanisms for three high-valent transition metals. Oxidation of SSO by benzyltriethylammonium permanganate in methylene chloride gives the corresponding sulfone, thianthrene 5,5-dioxide (SSO2), as the exclusive product. Oxidation of SSO by ruthenium tetroxide also gives SSO2 as the predominant product along with minor amounts of the disulfoxide, thianthrene 5,10-dioxide (SOSO). However, the converse is observed when chromyl chloride is used as the oxidant; SOSO is the major product. It

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20

Olimov, N. S., I. N. Ganiev, and M. Ch Shirinov. "INFLUENCE OF STRONTIUM ADDITION ON OXIDATION KINETICS OF INDUSTRIAL CAST ALUMINUM ALLOYS AL2, AL4 AND AL9." Расплавы, no. 3 (May 1, 2023): 274–86. http://dx.doi.org/10.31857/s0235010623030064.

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When melting cast aluminum alloys, their waste is observed, or more precisely, oxidation by the gas phase of the furnace. To select the optimal regime for melting alloys, it is necessary to know the physicochemical laws of this process, which are little studied. To study the kinetics of oxidation of metal melts, the method of continuous sample weighing is used, which is usually used in the study of high-temperature corrosion of solid metals. The mechanism of interaction of liquid metals with oxygen is similar in nature to high-temperature gas corrosion of solid metals. In both cases, adsorptio

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21

Chumarev, V. M., V. P. Maryevich, and V. A. Shashmurin. "On the Role of Diffusion in the Oxidation of Fe, Ni, Co and the Fe-Sn Alloy by Calcium and Sodium Sulfates." Defect and Diffusion Forum 258-260 (October 2006): 63–67. http://dx.doi.org/10.4028/www.scientific.net/ddf.258-260.63.

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Diffusion processes play a dominant part in the macro kinetics of Fe, Ni and Co oxidation by calcium and sodium sulfates. Here, the reaction product forms a compact covering which spatially divides the reagents on the surface in the same way as in the oxidation and sulfidization of metals by oxygen and sulfur. Therefore, it is possible to assume in advance that interaction of metals with calcium and sodium sulfates will be determined not by the actual chemical reaction properly but by the diffusion transport processes.

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22

Fu, Xinzhuang, Zhen Niu, Min Lin, Ya Gao, Wei Sun, and Tong Yue. "Strengthened Oxygen Oxidation of Ferrous Ions by A Homemade Venturi Jet Microbubble Generator towards Iron Removal in Hydrometallurgy." Minerals 11, no. 12 (2021): 1342. http://dx.doi.org/10.3390/min11121342.

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Iron normally exists in the form of ferrous ion (Fe2+) in primary ore deposits of valuable metals. To remove iron from hydrometallurgical leaching solution or suspension by precipitation, ferrous ion should be oxidized to ferric ion (Fe3+) first. Due to the low oxidation rate of Fe2+ by the traditional oxygen oxidation method, industry has to use more agitating barrels, steam, and compressed gas, as well as a larger workshop area, which dramatically increases the equipment investment and operation costs. In this study, a strengthened oxygen oxidation method for Fe2+ using a homemade venturi je

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23

Shimoda, Keiji, Taketoshi Minato, Koji Nakanishi, et al. "Oxidation behaviour of lattice oxygen in Li-rich manganese-based layered oxide studied by hard X-ray photoelectron spectroscopy." Journal of Materials Chemistry A 4, no. 16 (2016): 5909–16. http://dx.doi.org/10.1039/c6ta01152g.

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24

Stilhano Vilas Boas, Cristiane R., Jacobus M. Sturm, Wesley T. E. van den Beld, and Fred Bijkerk. "Oxidation kinetics of transition metals exposed to molecular and atomic oxygen." Materialia 20 (December 2021): 101203. http://dx.doi.org/10.1016/j.mtla.2021.101203.

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25

DiStefano, J. R., B. A. Pint, and J. H. DeVan. "Oxidation of refractory metals in air and low pressure oxygen gas." International Journal of Refractory Metals and Hard Materials 18, no. 4-5 (2000): 237–43. http://dx.doi.org/10.1016/s0263-4368(00)00026-3.

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26

Zheludkevich, M. L., A. G. Gusakov, A. G. Voropaev, A. A. Vecher, E. N. Kozyrski, and S. A. Raspopov. "Oxidation of Silver by Atomic Oxygen." Oxidation of Metals 61, no. 1/2 (2004): 39–48. http://dx.doi.org/10.1023/b:oxid.0000016275.96500.24.

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27

Safakas, Alexandros, Vasileios Ch Kournoutis, Georgios Bampos та Symeon Bebelis. "CO and Propane Combustion on La0.8Sr0.2CoxFe1−xO3−δ Perovskites: Effect of Fe-to-Co Ratio on Catalytic Activity". Catalysts 13, № 10 (2023): 1342. http://dx.doi.org/10.3390/catal13101342.

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Perovskites are promising alternative catalysts for oxidation reactions due to their lower cost compared to noble metals, and their greater thermal stability. The catalytic oxidation of CO is essential in order to control CO emissions in a series of applications whereas the catalytic combustion of propane is considered an economical and environmentally acceptable solution for energy production and gaseous pollutant management, since propane is among the organic compounds involved in photochemical reactions. This work concerns the effect of the Co/Fe ratio in the B-sites of a series of eight La

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28

Tukač, Vratislav, and Jiří Hanika. "Catalytic Effect of Active Carbon Black Chezacarb in Wet Oxidation of Phenol." Collection of Czechoslovak Chemical Communications 61, no. 7 (1996): 1010–17. http://dx.doi.org/10.1135/cccc19961010.

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The catalytic effects of hydrophilic granulated active carbon black Chezacarb have been tested in the oxidation of dilute (5 000 ppm) aqueous solutions of phenol. The research was focused on combined utilization of sorption and chemical (oxygen functional groups) properties of carbon black which support formation of free radicals in oxidation and on the catalytic effects of metals (Fe, Ni and V) present in the sorbent mentioned. The oxidation was carried out in a stainless steel autoclave of 1.25 l capacity. The reaction temperatures and the total pressures varied in the intervals of 120-160 °

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29

Bharadwaj, Mridula D., Lori Tropia, Murray Gibson, and Judith C. Yang. "Initial Kinetics of Copper Oxidation in Different Oxidizing Atmospheres as Studied by In Situ UHV-TEM." Microscopy and Microanalysis 6, S2 (2000): 42–43. http://dx.doi.org/10.1017/s1431927600032700.

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It is of fundamental and practical interest to understand the oxidation process since a desirable property for metals is resistance to corrosion. But there is a wide gap between information provided by surface science methods and that provided by bulk oxidation studies. The former have mainly examined the adsorption of ∼ 1 ML of oxygen on the metal surface, where as both low and high temperature bulk oxidation studies have mainly focused on the growth of an oxide layer at the later stages of oxidation.We are probing the initial oxidation stage of a model metal system by in situ ultra-high vacu

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30

Dosmukhamedov, N. K., E. E. Zholdasbay, A. A. Argyn, Yu B. Icheva, and M. B. Kurmanseitov. "Technology for processing balanced feed charge based on copper-, lead-containing products." Kompleksnoe Ispolzovanie Mineralnogo Syra = Complex Use of Mineral Resources 336, no. 1 (2025): 96–104. https://doi.org/10.31643/2026/6445.09.

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The study examined the behavior of copper, lead, zinc, and arsenic during the reductive-oxidative processing of a balanced charge under scaled-up technology conditions. The optimal parameters for ensuring high comprehensive recovery of metals into targeted products were identified: lead into rough lead, copper into matte, and zinc into slag. The feasibility of conducting reductive-oxidative smelting of a balanced charge was demonstrated. Optimal technology parameters were established: gas blowing time with natural gas – 20 minutes; with oxygen – 20 minutes; methane consumption – 1.7 times high

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31

Basyooni-M. Kabatas, Mohamed A. "A Comprehensive Review on Electrocatalytic Applications of 2D Metallenes." Nanomaterials 13, no. 22 (2023): 2966. http://dx.doi.org/10.3390/nano13222966.

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This review introduces metallenes, a cutting-edge form of atomically thin two-dimensional (2D) metals, gaining attention in energy and catalysis. Their unique physicochemical and electronic properties make them promising for applications like catalysis. Metallenes stand out due to their abundance of under-coordinated metal atoms, enhancing the catalytic potential by improving atomic utilization and intrinsic activity. This review explores the utility of 2D metals as electrocatalysts in sustainable energy conversion, focusing on the Oxygen Evolution Reaction, Oxygen Reduction Reaction, Fuel Oxi

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Jacob, K. T., and R. Adharsh. "Thermodynamics of Congruent Oxidation." High Temperature Materials and Processes 31, no. 4-5 (2012): 395–403. http://dx.doi.org/10.1515/htmp-2012-0072.

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AbstractCongruent oxidation occurs when an alloy oxidizes at constant oxygen chemical potential and temperature to an oxide in which the ratio of metallic components is the same as in the alloy. In alloys that undergo congruent oxidation concentration gradients near the surface are minimized. In this work thermodynamic conditions for congruent oxidation of binary and ternary alloys are formulated using the regular solution model to describe thermodynamic mixing properties. The conditions under which congruent oxidation can occur are identified. Congruent oxidation of a binary alloy X-Y will oc

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Bhukya, Vijay Nayak, and Durga Prasad Beda. "Characterization of Prasugrel Degradation Profile by Several Oxidative Reagents using HPLC and LC-MS/MS Technique." Asian Journal of Chemistry 36, no. 1 (2023): 148–60. http://dx.doi.org/10.14233/ajchem.2024.30710.

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Prasugrel, a derivative of thienopyridine functions as a prodrug that exerts irreversible inhibition on platelet ADP receptors by specifically targeting the P2Y12 receptor. In pharmaceuticals, the stability of the product plays a crucial role in establishing the shelf life of product. The second common degradation pathway next to hydrolysis is the oxidation. In practice, the oxidative stress studies were carried out using hydrogen peroxide (H2O2), free radicals, oxygen purging, transition metals, singlet oxygen, Fenton reagent, etc. This study compares the oxidative degradation behaviour of pr

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Chen, Shenghu, and Lijian Rong. "Oxidation Behavior of Intermetallic Phase and Its Contribution to the Oxidation Resistance in Fe-Cr-Zr Ferritic Alloy." Metals 12, no. 5 (2022): 827. http://dx.doi.org/10.3390/met12050827.

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Oxidation resistance of the ferritic Fe-Cr-W-Zr alloy with dispersed Fe2Zr phase were investigated in stagnant air and in static oxygen-saturated liquid Pb-Bi eutectic separately considering the service environment in the advanced generation IV nuclear reactors. A duplex structure including an outer Fe2O3 layer and an inner (Fe,Cr,Zr)2O3 layer is developed after oxidation in air, while a three-layered structure consisting of outer magnetite layer, inner Fe-Cr spinel layer, and internal oxidation zone is formed after oxidation in liquid Pb-Bi eutectic. The dispersed Fe2Zr phase shows delayed ox

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35

Lisicki, Dawid, Beata Orlińska, Tomasz Martyniuk, Krzysztof Dziuba, and Jakub Bińczak. "Selective Oxidation of Cyclohexanone to Adipic Acid Using Molecular Oxygen in the Presence of Alkyl Nitrites and Transition Metals as Catalysts." Materials 16, no. 16 (2023): 5722. http://dx.doi.org/10.3390/ma16165722.

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This paper presents a not previously reported catalytic system consisting of transition metals Co2+ and Mn2+ and alkyl nitrites R-ONO for the oxidation of cyclohexanone with oxygen to adipic acid. The influence of type and amount of catalyst, temperature, time, and type of raw material on conversion and product composition were determined. In addition, the oxidation of selected cyclic ketones such as cyclopentanone, cyclohexanone, cyclooctanone, cyclododecanone, 2-methylcyclohexanone, 3-methylcyclohexanone, and 4-methylcyclohexanone in acetic acid as solvent was performed. The results showed t

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36

Ha, Seong-Ho, Shah Abdul Wahid, Bong-Hwan Kim, Young-Ok Yoon, Hyun-Kyu Lim, and Shae K. Kim. "Oxidation Kinetics of Cu Alloys Containing Alkaline Earth Metals at Low Temperature." Journal of Nanoscience and Nanotechnology 21, no. 3 (2021): 2071–74. http://dx.doi.org/10.1166/jnn.2021.18947.

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In this study, the oxidation behavior of Cu alloys containing two alkaline earth metals (i.e., Mg and Ca) at 500 °C was investigated. The Mg+Mg2Ca master alloy was used for the simultaneous addition of Mg and Ca into Cu. As a result of the oxidation test, all examined samples showed weight gains that followed parabolic laws. Mg addition in Cu considerably slowed down the oxidation rate, while the use of the Mg+Mg2Ca master alloy as an alloying element for Mg led to an even further reduction in the oxidation rates at the testing temperature. The phase diagrams with the oxygen partial pressure s

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Li, Ziyong, Qingdan Huang, Tingyan Wang, Huihong Huang, and Haoyong Song. "Effect of cell sintering temperature on the performance of non-noble metal loaded cerium oxide SOEC anodes." Journal of Physics: Conference Series 2783, no. 1 (2024): 012050. http://dx.doi.org/10.1088/1742-6596/2783/1/012050.

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Abstract Introducing methane oxidation reaction into the anode of the high-temperature solid oxide electrolysis cell (SOEC) can reduce the power consumption for water electrolysis. Compared to the traditional conditions of methane oxidation, the methane oxidation catalyst sintered at the SOEC anode, which is closely related to the cell sintering process. This study uses non-noble metals as active sites for methane oxidation, zirconia, and samarium oxides doped ceria as catalyst support and oxygen ion conductors. The effects of anode sintering temperature on the electrochemical performance of S

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38

Han, Jiashuai, Roger Lin, Mahdi Salehi, et al. "Kraft Lignin Electro-Oxidation under Ambient Temperature and Pressure." Energies 16, no. 24 (2023): 8007. http://dx.doi.org/10.3390/en16248007.

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Lignin is the largest natural source of aromatic chemicals. Due to its complex polymeric structure, Kraft lignin is under-utilized and usually combusted for heat generation, thus resulting in CO2 emissions in the Kraft process. To valorize lignin with renewable electricity and to convert it into value-added aromatic chemicals, efficient electrochemical methods need to be discovered, based not only on its apparent yield of building block chemicals but also on its energy efficiency. In this study, the electro-oxidative performance of six different metals was systematically evaluated. The results

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Guardado-Cruz, Sheila Teresita, Rafael Ortiz-Alvarado, Claudia De León, and César Rogelio Solorio-Alvarado. "Unprecedented and Scalable Copper (I)-Catalyzed Oxidation of the Csp2-H bond on 2-phenyl-naphthalene-1,3-diol with Atmospheric Oxygen: synthesis of 2-Hydroxy-3-phenyl-1,4-naphthoquinone via direct Csp2-O bond formation." Acta Universitaria 27, no. 5 (2017): 62–68. http://dx.doi.org/10.15174/au.2017.1337.

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The Csp2-O bond formation via direct oxidation of the Csp2-H bond on electron-rich compounds such as naphthols, is a process that generally requires drastic reaction conditions like high temperature or pressure. Addition of strong oxidants as H2O2, hypervalent iodine reagents (λ3 o λ5), expensive transition metals or rare earth elements, such as Mo, Ru Pt or Ce, is usually necessary. As part of this study on oxidative dimerization of phenols towards the total synthesis of ningalin D, 1,3-naphthalenediol was explored as starting material using stoichiometric amounts of Cu(I) and atmospheric mol

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Kesavan, V., D. Dhar, Y. Koltypin, et al. "Nanostructured amorphous metals, alloys, and metal oxides as new catalysts for oxidation." Pure and Applied Chemistry 73, no. 1 (2001): 85–91. http://dx.doi.org/10.1351/pac200173010085.

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The oxidation of cyclohexane with molecular oxygen in the presence of isobutyraldehyde catalyzed by nanostructured iron and cobalt oxides and iron oxide supported on titania has been studied. Nanostructured cobalt oxide on MCM-41 is found to be efficient for catalytic aerobic epoxidation of olefins.

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Jitendra, Sunte. "Importance of Noble Gases and Metals in Welding and Coating as in Manufacturing Processes." Research and Reviews on Experimental and Applied Mechanics 6, no. 1 (2023): 14–18. https://doi.org/10.5281/zenodo.7886095.

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<em>Now a days the corrosion, rusting is common unwanted thing is occurrence in most of the ferrous materials, because of oxidation and reduction of materials reactive nature. This paper will give solution to thus problems of phenomenon of corrosion. In manufacturing materials as in case of fabrication as welding, using noble gases avoids rusting or corrosion. Further in coating expensive materials as noble metals applying on metals prevents oxidation and reduction reactions. The protective layer is very small. Noble metals are any of a number of metallic chemical elements that exhibit excepti

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Ahn, Ho-Geun, Byoung-Min Choi, and Do-Jin Lee. "Complete Oxidation of Ethylene over Supported Gold Nanoparticle Catalysts." Journal of Nanoscience and Nanotechnology 6, no. 11 (2006): 3599–603. http://dx.doi.org/10.1166/jnn.2006.17990.

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Complete oxidation of ethylene was performed over supported noble metals or transition metals oxide catalysts and on monoliths under atmospheric pressure. Gold nanoparticles on Al2O3 or MxOy (M = Mo, Fe, Mn) were prepared by impregnation, coprecipitation, deposition, and dispersion methods. Nanoparticles prepared by impregnation method were irregular and very large above 25 nm, but those by coprecipitation and deposition method were uniformly nanosized at 4 ∼ 5 nm. The gold nanoparticle were outstandingly active in catalyzing oxidation of ethylene. The activity order of these catalysts with pr

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Wang, Jimin, and Xi Chen. "Numerical simulation and operation optimization for billet heating in disc reheating furnace based on grey correlation." Metallurgical Research & Technology 120, no. 5 (2023): 503. http://dx.doi.org/10.1051/metal/2023060.

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To further promote the equipment improvement of reheating furnaces in iron and steel production, considering heating movement and oxidation loss for the billet in 40 tons/hour self-designed disc reheating furnace, a comprehensive CFD model is established through the dynamic mesh technology with UDF subroutines. The billet heating process in the disc reheating furnace is numerically simulated to explore the dynamic heating characteristics of the billet in the disc reheating furnace. According to the orthogonal design, the grey correlation method is used to optimize the operation parameters such

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Korshunov, A. V. "Features of Structural-Phase Transformations during Oxidation of Metals with Bulk Submicrocrystalline Structure and Fine Metal Powders." Key Engineering Materials 887 (May 2021): 275–80. http://dx.doi.org/10.4028/www.scientific.net/kem.887.275.

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The oxidation processes for compact and powdery samples of titanium, copper, and molybdenum with different volume structure and dispersivity were studied using thermal analysis, electron microscopy, and X-ray diffraction. It is established that producing of metals with a modified structure under conditions of high-energy impact (severe plastic deformation, electric explosion of a thin wire) in accordance with intermediate annealing leads to an increase in the content of oxygen in the form of solid solutions and oxides; the oxide component’s share, form and localization within the material depe

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VISHNEVSKII, A. L., E. I. LATKIN, and V. I. ELOKHIN. "AUTOWAVES ON CATALYST SURFACE CAUSED BY CARBON MONOXIDE OXIDATION KINETICS: IMITATION MODEL." Surface Review and Letters 02, no. 04 (1995): 459–69. http://dx.doi.org/10.1142/s0218625x95000418.

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We constructed and studied an imitation model of CO oxidation reaction on platinum metals. The model takes into account oxygen dissociative adsorption, monomolecular adsorption and desorption of carbon monoxide, active oxygen transformation into a less active oxygen of the second type, adsorbed CO reaction with the two types of oxygen, and CO diffusion over the surface. We found that adsorbate coverages and reaction rate undergo self-oscillations attended by the autowave behavior of adsorbates on the surface. With respect to oxygen partial pressures the interval of oscillations splits into thr

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Elberling, Bo, and Bjarne Riis Langdahl. "Note: Natural heavy-metal release by sulphide oxidation in the High Arctic." Canadian Geotechnical Journal 35, no. 5 (1998): 895–901. http://dx.doi.org/10.1139/t98-047.

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An assessment of the environmental impact of the weathering of sulphide-rich rocks at Citronen Fjord, North Greenland, provided information on sulphide oxidation rates and metal release from outcrops of sediment-hosted, stratiform ore that may be mined for its zinc content. In situ oxygen uptake rates were measured at the surface of partly weathered sulphide-rich outcrops and compared with metal contents in streams and soil water. The oxygen uptake rates measured during August 1996 were of the same order of magnitude as those reported from mine tailings at lower latitudes. The variation in met

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Kaczmarska, A., Z. Grzesik, and S. Mrowec. "On the Defect Structure and Transport Properties of Co3O4 Spinel Oxide." High Temperature Materials and Processes 31, no. 4-5 (2012): 371–79. http://dx.doi.org/10.1515/htmp-2012-0069.

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AbstractDefect structure and transport properties of Co3O4 cobalt oxide have been studied as a function of temperature and oxygen pressure, using marker and thermogravimetric techniques. It has been found that the oxidation of CoO to form Co3O4 follows parabolic kinetic, being thus diffusion controlled. Marker experiments have demonstrated that cation sublattice of Co3O4 oxide is predominantly disordered, but the defect structure is rather complex. At very low oxygen pressures, close to the dissociation pressure of the oxide, interstitial cations are the predominant point defects, while at hig

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Nath, K. A., and A. K. Salahudeen. "Autoxidation of cysteine generates hydrogen peroxide: cytotoxicity and attenuation by pyruvate." American Journal of Physiology-Renal Physiology 264, no. 2 (1993): F306—F314. http://dx.doi.org/10.1152/ajprenal.1993.264.2.f306.

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The reactivity of cysteine presents a paradox: although regarded as an antioxidant, cysteine interacts with oxygen in a metal-catalyzed reaction to produce reactive species. Because ischemia provokes the appearance of millimolar amounts of cysteine and increased amounts of transition metals, we studied whether cysteine, in the presence of transition metals, consumes oxygen, generates hydrogen peroxide, and is toxic. Using fluorescence cytometry, we provide direct evidence that hydrogen peroxide is copiously generated during cysteine autoxidation. Pyruvate attenuates such generation of hydrogen

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Raikar, G. N., J. C. Gregory, and P. N. Peters. "Oxidation of copper by fast atomic oxygen." Oxidation of Metals 42, no. 1-2 (1994): 1–15. http://dx.doi.org/10.1007/bf01061921.

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Savchenko, Valerii I. "The Chemisorption of Oxygen and the Oxidation of Carbon Monoxide on Metals." Russian Chemical Reviews 55, no. 3 (1986): 222–31. http://dx.doi.org/10.1070/rc1986v055n03abeh003184.

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