Article
Materials Science, Multidisciplinary
Paulina Summa, Katarzyna Swirk Da Costa, Jithin Gopakumar, Bogdan Samojeden, Monika Motak, Magnus Running, Wouter Van Beek, Patrick Da Costa
Summary: The addition of cobalt to Ni-Mg-Al mixed oxides enhances the catalytic performance for the hydrogenation of CO2 to methane by improving Ni reducibility, surface basicity, electronic and textural properties.
APPLIED MATERIALS TODAY
(2023)
Article
Materials Science, Ceramics
Xudong Liu, Yongting Zheng, Xiaoyue Su, Yongdong Yu, Yuchen Yuan, Renjie Wang, Shiyang Zhu, Yuelei Bai, Guobing Ying
Summary: This work successfully synthesized non-stoichiometric MgAl2O4 spinel solid solution powders using combustion synthesis and investigated their precipitation and sintering behavior. Different powders with varying solid solubility exhibited various precipitation and phase transition behavior during annealing. After hot-press sintering, the MgAl2O4 ceramics showed improved mechanical performance with evenly precipitated 100 nm spheres.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
E. M. Bayan, V. Yu. Storozhenko, M. A. Bunin
Summary: Nickel ferrite thin films were synthesized using a new solid-phase pyrolysis method, and the impact of annealing temperature on their characteristics was investigated. The films exhibited a high-quality surface composed of nanocrystallites, indicating promising potential for various applications.
Article
Chemistry, Multidisciplinary
Qianwenhao Fan, Chuande Huang, Shibo Xi, Yong Yan, Jijiang Huang, Syed Saqline, Longgang Tao, Yihu Dai, Armando Borgna, Xiaodong Wang, Wen Liu
Summary: This study reports the development of a sintering-resistant MgO-doped Fe2O3 oxygen carrier with superior cyclic stability and high oxygen-carrying capacity. The unique solid solution mixture effectively reduces exergonicity and prevents structural transformations.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Duc Thang Le, Heongkyu Ju
Summary: Nanocrystalline Mn-Ni-Cu-O powder was synthesized from a mixed chloride aqueous solution using a co-precipitation method with the introduction of an oxidizing agent, resulting in fine ceramic particles with high density structure suitable for industrial thermistor application.
Article
Energy & Fuels
Xiaoning Hou, Shaojun Qing, Yajie Liu, Lei Zhang, Caishun Zhang, Gang Feng, Xiang Wang, Zhixian Gao, Yong Qin
Summary: The study successfully synthesized an efficient catalyst Cu1-xMgxAl3 ternary spinel oxide using a versatile and green method, showing promising performance in methanol steam reforming. The incorporation of magnesium into the spinel lattice helps to maintain stable catalytic performance and facilitate the in-situ formation of smaller nano copper metals.
Article
Materials Science, Multidisciplinary
Joao Lucas Nicolini, Edgar Andres Chavarriaga, Alex Lopera, Tiago Bender Wermuth, Claudia Garcia, Javier Alarcon, Alexandre Cas Viegas, Marcos Antonio Zen Vasconcellos, Oscar Rubem Klegues Montedo, Carlos Perez Bergmann, Sabrina Arcaro
Summary: Spinel ferrites, including CoFe2O4, synthesized via gel combustion using tris as an alternative fuel, have shown excellent properties for various applications. The oxidizer-to-fuel molar ratio significantly affects the formation and properties of the spinel ferrites.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Physical
Andoni Choya, Beatriz de Rivas, Juan Ramon Gonzalez-Velasco, Jose Ignacio Gutierrez-Ortiz, Ruben Lopez-Fonseca
Summary: The study focuses on supported bimetallic Co-Ni catalysts for methane oxidation, showing that simultaneous incorporation of nickel and cobalt enhances redox properties and increases active lattice oxygen species, leading to improved reaction rates. The most active catalyst exhibited stability during prolonged operation but irreversible deactivation in the presence of water vapor.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Materials Science, Multidisciplinary
Ali Sharifi, Raziye Hayati, Nader Setoudeh, Ghasem Rezaei
Summary: Cobalt ferrite oxide (CoFe2O4) was synthesized using two different methods, mechanochemical and combustion. The powder synthesized through combustion method showed higher saturation magnetization and coercive field compared to the one synthesized through mechanical milling, possibly due to the presence of Co3+ in the starting powder.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Chemistry, Inorganic & Nuclear
Michael P. Bubnov, Nina A. Skorodumova, Georgy K. Fukin, Roman Rumyantsev, Alexey A. Zolotukhin, Artem S. Bogomyakov, Vladimir K. Cherkasov
Summary: The study demonstrates the formation of solid solutions through a one-pot reaction involving a cobalt complex and similar complexes. The different metals ratios are well reproduced in the solid solutions, with confirmed magnetic and crystal structures. Dilution of the redox-isomeric compound with inert components results in a decrease in transition temperature, with the difference in molecules volumes between different metal pairs proposed as a potential explanation.
Article
Chemistry, Multidisciplinary
M. A. Islam, A. K. M. Akther Hossain
Summary: This research work focuses on the magnetic properties, nature of the magnetic phase transition, magnetocaloric effect, and critical scaling of magnetization of various Co1-xCrxFe2O4 (x = 0, 0.125, 0.25, 0.375, and 0.5) samples. The results show that the magnetocaloric effect is reliable for samples with x = 0.125, 0.250, and 0.375.
Article
Chemistry, Multidisciplinary
Paulina Summa, Marta Gajewska, Li Li, Changwei Hu, Bogdan Samojeden, Monika Motak, Patrick Da Costa
Summary: Solution combustion synthesis can serve as an alternative pathway for synthesizing mixed oxide catalysts similar to hydrotalcite-derived catalysts. Samples prepared using solution combustion synthesis exhibited higher activity and selectivity compared to the reference hydmtalcite-based catalyst.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Thermodynamics
Marieta K. Zakaryan, Narine H. Amirkhanyan, Khachik T. Nazaretyan, Suren L. Kharatyan, Khachatur V. Manukyan
Summary: This work presents the combustion synthesis mechanism using hexamethylenetetramine as fuel and nickel nitrate as oxidizer. Detailed investigations reveal the multistage decomposition of the oxidizer and sublimation of the fuel, resulting in the release of nitrogen, hydrazine, and methane. The highly exothermic reactions between nitrogen oxides emitted during the decomposition of the oxidizer and methane and hydrazine determine the maximum temperature of combustion. Excessive amounts of hydrazine and methane reduce nickel oxide to nanoscale nickel, which readily consolidates into samples of high relative densities.
COMBUSTION AND FLAME
(2023)
Article
Chemistry, Physical
Vladimir E. Antonov, Vitaly D. Muzalevsky, Nikita S. Orlov
Summary: The study reveals that the miscibility gap in solid interstitial MeHx solutions exhibits a symmetric pattern in T-x projection, and the pressure vs. temperature dependence of the isomorphic phase transformation is determined by the reaction Me + (z/2)H2 = MeHz with a fixed z value. The experimental data of standard Gibbs energy for isomorphic transformations in Pd-H, Pd-D, Ni-H, and Ni-D systems can be explained by considering the mixing Gibbs energy and literature data of pure metal Me and hydride MeHz.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Prawal P. K. Agarwal, Devon Jensen, Chien-Hua Chen, Robert M. Rioux, Themis Matsoukas
Summary: Reducing the thickness of the native oxide layer is crucial in enhancing the reactivity and heat release during the oxidation of boron particles. This can be achieved by adding Mg, which undergoes an exothermic redox reaction to reduce the native oxide and enrich metallic boron. The synthesized Mg/B solid solutions exhibit a core-shell structure, prolonging the shelf life and promoting heat release, making them promising as energetic materials.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
V. D. Zhuravlev, A. Dmitriev, E. V. Vladimirova, I. M. Giniyatullin, D. Pereverzev, E. A. Sherstobitova
Summary: The solution-combustion synthesis of NixCo3 - xO4 (x < 1) spinels using citric acid-glycine mixtures as a dual fuel was investigated, revealing that a decrease in combustion temperature resulted in the synthesis of NiCo2O4 spinel with minimal amounts of glycine and citric acid. On the other hand, an increase in the fuel content led to higher reaction temperatures and the formation of non-stoichiometric spinels NixCo3 - xO4 (x < 1) with an admixture of double oxides NiyCo1 - yO (y = 0.71-0.77) after annealing.
INTERNATIONAL JOURNAL OF SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS
(2021)
Article
Materials Science, Ceramics
D. Pereverzev, I. M. Giniyatullin, E. V. Vladimirova, V. D. Zhuravlev, A. Dmitriev
Summary: The article discusses the synthesis of spinel NiCo2O4 using hydrothermolysis, precipitation of oxalates, and ultrasonic aerosol pyrolysis methods. The different synthesis methods result in variations in morphology, porous structure, specific surface area, and pore volume of the obtained samples.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
