Article
Chemistry, Multidisciplinary
Janina Kossmann, Maria Luz Ortiz Sanchez-Manjavacas, Jessica Brandt, Tobias Heil, Nieves Lopez-Salas, Josep Albero
Summary: The preparation of stable and efficient electrocatalysts using abundant and non-critical row-materials is crucial for their industrial implementation. This study presents a simple synthetic route to prepare Mn(ii) sub-nanometric active sites on a highly N-doped noble carbonaceous support, which not only enhances the stability of Mn(ii) sites against oxidation, but also provides a suitable coordination environment for electrochemical CO2 reduction.
CHEMICAL COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Y. L. Hu, M. Li, Y. D. Hou, X. N. Li, Z. M. Li, Z. L. Cheng, Y. Y. Shao, Y. H. Zheng, C. Dong
Summary: In this study, a multi-scale-phases coherent precipitation-strengthened Cu-based high-temperature alloy was designed, which inhibited the discontinuous precipitation and improved the stability of the y' phase through strong enthalpic interactions between elements. The addition of M element significantly reduced the softening rate of hardness and the rising rate of electrical resistivity at high temperatures, indicating a positive effect on the thermal stability of the alloy. Furthermore, multi-scale-phases coherent precipitation strengthening provides a new approach for the development of heat-resistant alloys with superior performance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Metallurgy & Metallurgical Engineering
Weixin Lou, Hongbo Xie, Xiaobo Zhao, Junyuan Bai, Hehang Zhang, Yi Wang, Xinze Li, Hucheng Pan, Yuping Ren, Gaowu Qin
Summary: In Mg alloys, precipitation on non-basal planes is limited but crucial. However, in an aged ultralight Mg-Li-Zn alloy, precipitates dominated by C15 Laves structure can form in various habit planes, resulting in three forms of strengthening-phases: precipitate-rod, precipitate-lath, and precipitate-plate. Moreover, the non-basal precipitates can transform into the basal (Mg, Li)Zn2 Laves structure with prolonged aging. These findings provide insights into the precipitation behaviors of multi-domain Laves structures and offer guidance for designing ultralight high-strength Mg-Li based alloys.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Hongbo Xie, Shanshan Li, Peijun Yang, Chuangwei Liu, Weitao Jia, Gaowu Qin
Summary: This study systematically investigated the precipitation behaviors of nano-sized secondary phases in grain boundaries. The results show that the minimization of GB elastic strain drives the segregation of solutes to the interfacial strain zones, and the selective substitution of solutes resulting in the nucleation of face-centered-cubic (FCC) phase from the bi-crystalline hexagonal closed-packed (HCP) lattices. The interphase boundary strain driven solute diffusion plus atomic shuffling can realize the growth of parent phase {1100}HCP lattices to the {110}FCC atomic-planes.
Review
Chemistry, Multidisciplinary
Yu Li, Tong-Bu Lu
Summary: Converting CO2 into chemicals using renewable electricity can achieve carbon neutrality by lowering cell voltage and increasing output value. This review summarizes the recent breakthroughs in combining CO2 reduction reactions with various anodic oxidation reactions and identifies major challenges and future prospects.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Review
Chemistry, Multidisciplinary
Robert Haaring, Phil Woong Kang, Zunmin Guo, Jae Won Lee, Hyunjoo Lee
Summary: As demand for a carbon-neutral society grows, research on CO2 electrolysis has become active. Flow and MEA cells with gas-diffusion electrodes (GDEs) achieve high production rates, but the complex interface of GDEs may affect the performance of catalysts with high intrinsic activity. High current densities can also lead to conductivity and mass transfer limitations as well as catalyst instability. Strategies such as controlling microenvironments and unique electrolyzer designs have been used to achieve high partial current densities for both gaseous and liquid products.
ACCOUNTS OF CHEMICAL RESEARCH
(2023)
Article
Nanoscience & Nanotechnology
Kishor Kumar Johari, Durgesh Kumar Sharma, Ajay Kumar Verma, Ruchi Bhardwaj, Nagendra S. Chauhan, Sudhir Kumar, Manvendra Narayan Singh, Sivaiah Bathula, Bhasker Gahtori
Summary: The inclusion of full-Heusler in the half-Heusler matrix is a well-studied method to reduce the lattice thermal conductivity of ZrNiSn alloys. Excess nickel in ZrNiSn can lead to the formation of full-Heusler and/or half-Heusler alloys with niobium defects, which affect the electronic and phonon transport properties. In this study, germanium doping and excess nickel were investigated for their implications on the thermoelectric transport of ZrNiSn. The synthesized alloys showed optimized electrical power factors and lattice thermal conductivity, with a ZT value of 1.06 at 873 K.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Aditya Prajapati, Rohan Sartape, Miguel T. Galante, Jiahan Xie, Samuel L. Leung, Ivan Bessa, Marcio H. S. Andrade, Robert T. Somich, Marcio Reboucas, Gus T. Hutras, Nathalia Diniz, Meenesh R. Singh
Summary: To reduce atmospheric CO2 levels, it is important to develop and integrate electrochemical CO2 capture and reduction technologies. This study presents a systematic protocol and successfully integrates the CO2 capture and reduction processes to produce value-added products.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Materials Science, Ceramics
Lidan Liu, Taoyong Liu, Piao Liu, Qianxing Huang, Hua Gui, Anxian Lu
Summary: In this work, CuO-doped MgO-Al2O3-SiO2 based glasses were successfully synthesized using conventional melt quenching method, and the influence of CuO content on the structure and properties of the glasses was investigated. The results showed that CuO acted as a glass modifier to depolymerize the silicate network, with the main crystalline phase being alpha-cordierite. The presence of Cu2+ ions in the octahedral sites was confirmed by the characteristic absorption band around 750 nm on the optical transmittance spectra, and luminescence caused by Cu+ ions resulted in a decrease in luminescence lifetime.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Je In Lee, Wook Ha Ryu, Kook Noh Yoon, Eun Soo Park
Summary: By systematically designing Mg-based bulk metallic glass matrix composites containing primary alpha-Mg phases, the developed materials exhibit significantly higher compressive fracture strength and specific strength compared to commercial Mg alloys. The presence of dispersed primary alpha-Mg phases in the composite materials inhibits rapid shear band propagation and promotes the formation of multiple shear bands, leading to enhanced plasticity and work hardening. These results suggest a promising strategy for fabricating Mg-based BMGMCs with high specific strength and enhanced plasticity for lightweight structural applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Chemistry, Multidisciplinary
Wanling Zhang, Wenbiao Zhang, Jingwen Tan, Yi Tang, Qingsheng Gao
Summary: This review provides an overview of Chevrel phases (CPs) with the chemical formula of MxMo6T8 (T = S, Se, and Te) as noble-metal-free electrocatalysts. It focuses on the representative efforts made and progress achieved in exploring the crystal structure and surface configurations to enhance efficiency. The design, fabrication, and catalytic performance of CPs are discussed in detail, and the potential of CPs in electrocatalysis is highlighted. The review aims to deepen the understanding of CPs and inspire the development of more cost-efficient catalysts.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Kenta Sonoda, Muneaki Yamamoto, Tetsuo Tanabe, Tomoko Yoshida
Summary: The synthesis of α-phase (alpha-Ga2O3) with high photocatalytic activity for CO2 reduction and water splitting was achieved for the first time by calcination of GaOOH obtained from a direct reaction of liquid Ga metal with water. The conversion of GaOOH to α-Ga2O3 at temperatures above 623 K led to well-crystallized samples at 723-823 K, promoting the photocatalytic CO2 reduction with water to produce CO, H2, and O2. This study demonstrated the high photocatalytic activity of α-Ga2O3 for converting CO2 to CO without a cocatalyst.
Article
Nanoscience & Nanotechnology
Shuhui Lv, Qiang Yang, Xiaoling Lv, Fanzhi Meng, Xin Qiu
Summary: Intermetallic phases in Mg-8Zn-6Al-1Sm alloys in both as-cast and peak-aged conditions were investigated. The study identified various intermetallic phases, such as Mg44Al15Zn41, Mg5Zn2Al2, Mg-32(Al,Zn)(49), and Al2Sm. Aging treatment showed a possible phase transformation and revealed precipitate constituents, including i phase, MgZnAl cubic phase, MgZn2 phase, Mg4Zn7 phase, and aperiodic structures. The study also found multiple orientation relationships between precipitates and the Mg matrix, and observed ordering planar faults in MgZn2 precipitates. The calculations demonstrated the superior strengthening effect of Mg-Zn-Al precipitates and attributed the high strength of the alloy to semi-continuous intermetallic skeletons and Mg-Zn-Al precipitates.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Review
Chemistry, Physical
Yu Chen, Chong Liu, Shien Guo, Tiancheng Mu, Lei Wei, Yanhong Lu
Summary: This review discusses the capture, sensing, and conversion of CO2 using MXene and MXene-based materials, and summarizes the underlying mechanisms. The findings provide new insights for efficient CO2 utilization and widespread applications.
GREEN ENERGY & ENVIRONMENT
(2022)
Article
Chemistry, Multidisciplinary
Xiaodong Wu, Na Yang, Yuanxiao Ji, Xuexia He, Qi Li, Ruibin Jiang, Zhibin Lei, Zonghuai Liu, Jie Sun
Summary: This research investigates the phase transformation from TiO2 to TinO2n-1 and characterizes the phase composition and interface structures of the products at different temperatures using transmission electron microscopy. The crystallographic features of the observed interfaces have been calculated based on modified invariant line theory, confirming the consistency of the experimental observation and calculated results.
Article
Chemistry, Physical
Sujanya Maria Ruban, C. I. Sathish, Kavitha Ramadass, Stalin Joseph, Sungho Kim, Venkata D. B. C. Dasireddy, In Young Kim, Ala'a H. Al-Muhtaseb, Yoshihiro Sugi, Ajayan Vinu
Summary: Ordered mesoporous carbon nitrides (MCN) with tuneable nitrogen contents and basicity were prepared and used for catalyzing Knoevenagel condensation reactions. The chemical structure and nitrogen content of the materials were finely tuned by adjusting the calcination temperature. The optimized C3N5 catalyst showed enhanced catalytic activity and stability compared to other mesoporous basic catalysts.
Article
Chemistry, Multidisciplinary
Yoshihiro Sugi, Stalin Joseph, Kavitha Ramadass, Sathish Clastinrusselraj Indirathankam, Selvarajan Premkumar, Venkata D. B. C. Dasireddy, Jae-Hun Yang, Ala'a H. Al-Muhtaseb, Qing Liu, Yoshihiro Kubota, Kenichi Komura, Ajayan Vinu
Summary: The isopropylation of naphthalene over USY zeolite resulted in the formation of all eight possible DIPN isomers, operated under kinetic and/or thermodynamic controls at different reaction temperatures. Triisopropylnaphthalene isomers were also formed, with the predominance of certain isomers depending on temperature and reaction period, indicating a combination of kinetic and thermodynamic controls in the selectivities. Large cavities of the zeolite allowed the formation of all TriIPN isomers without steric restriction.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2021)
Article
Polymer Science
Gregor Lavric, Ana Oberlintner, Inese Filipova, Uros Novak, Blaz Likozar, Urska Vrabic-Brodnjak
Summary: The study found that polysaccharide-based films with added CNC are the most suitable for packaging purposes, and better dispersal of nanocellulose in chitosan than in alginate was observed. By adding CNC, the hydrophobicity of chitosan and alginate films increased, and chitosan with 3% CNC showed the highest contact angle and 15% lower moisture absorption compared to pure chitosan.
Article
Polymer Science
Edita Jasiukaityte-Grojzdek, Filipa A. Vicente, Miha Grilc, Blaz Likozar
Summary: The study aims to explore the conversion of wood into products through a circular economy approach to maximize value. By utilizing reaction productivity, optimizing by-products, and reducing waste, environmental burdens can be minimized, and environmental issues can be addressed through the implementation of bio-economic principles.
Article
Green & Sustainable Science & Technology
Akinola David Olugbemide, Ana Oberlintner, Uros Novak, Blaz Likozar
Summary: The valorization study focused on utilizing corn stover waste biomass after pretreatment with deep eutectic solvent (DES) for enhanced biomethane production. Different pretreatment conditions were tested, showing a significant increase in biomethane production, indicating a strong potential for DES-pretreatment in improving biomethane yields.
Article
Engineering, Chemical
Ana Jakob, Miha Grilc, Janvit Terzan, Blaz Likozar
Summary: The study reports the solubility and temperature dependence of bio-based levulinic acid (LA), furfural (FF), and hydroxymethylfurfural (HMF) using Fourier-transform infrared (FTIR) spectroscopy as the detection method. The data obtained are crucial for designing biorefinery processes and optimizing reaction yields through selective compound extraction.
Article
Green & Sustainable Science & Technology
Venkata D. B. C. Dasireddy, Blaz Likozar
Summary: Nanocomposite Cu-Mn-O nano-particle (CuMnNP) and nano-sheet (CuMnNS) catalysts were successfully prepared via a one-step hydrothermal method without any templating reagent. CuMnNS showed enhanced crystal lattice oxygen reactivity and higher O2 adsorption/storage capacity compared to CuMnNP. Additionally, CuMnNS demonstrated superior catalytic activity in the preferential oxidation (PROX) pathway of CO.
Article
Polymer Science
Gregor Lavric, Aleksandra Zamljen, Janja Juhant Grkman, Edita Jasiukaityte-Grojzdek, Miha Grilc, Blaz Likozar, Diana Gregor-Svetec, Urska Vrabic-Brodnjak
Summary: The aim of this study was to isolate lignin from different sources and use it for paper surface to replace non-renewable resources. The coated papers showed promising barrier properties, with no significant difference in mechanical properties between coated and uncoated samples. The correlation between structural, morphological, and natural lignin-based factors was highlighted, emphasizing the potential for tuning functionality by design to optimize performance in the future.
Article
Engineering, Chemical
Anze Prasnikar, Venkata D. B. C. Dasireddy, Blaz Likozar
Summary: This article focuses on the selectivity control of CO2 hydrogenation by varying the chemical Cu oxidation state, the synergistic effect between copper, alkaline metal elements, and support, as well as the operational parameters. Perovskite-containing Cu/Sr/Ti materials were synthesized via the solution combustion method, and their physicochemical properties were characterized using various techniques. The results demonstrated the correlation between the properties and catalytic performance. Moreover, the optimal energy source and heating temperature were identified to improve the activity and stability of the catalyst.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Chemical
Akinola David Olugbemide, Blaz Likozar
Summary: The need for a circular economy model is increasing due to the growth of the human population and the decrease in natural resources. This study focused on the anaerobic digestion of rice husk to produce biogas and digestates. Optimum conditions for biogas production were determined based on particle size and dilution ratio. The resulting digestates were characterized and found to have potential as biofertilizers and nutrient sources for microalgae cultivation. The absence of heavy metals in the digestates confirmed their safety for application. The pH values and nitrogen content of the digestates were suitable for the cultivation of some microalgae strains.
Article
Green & Sustainable Science & Technology
Venkata D. B. C. Dasireddy, Blaz Likozar
Summary: The photocatalytic reduction of CO2 to methanol over bismuth-promoted BaTiO3 chemical photocatalyst was studied. Catalysts were prepared using different methods and characterized for phases and morphology. It was found that the addition of bismuth and barium improved the light absorption ability of the catalyst. Combustion-prepared samples showed higher basicity and water adsorption. The synergetic effect between bismuth and titanium resulted in the formation of methanol.
Article
Polymer Science
Ana Oberlintner, Blaz Likozar, Uros Novak
Summary: Cellulose nanocrystals (CNCs) were acetylated and incorporated into alginate (ALG) and chitosan (CH) film-forming solutions. SEM analysis showed improved compatibility between CH matrix and acetylated CNCs, resulting in a smooth surface layer, while ALG mixed better with pristine CNCs. ATR-FTIR analysis revealed structural changes in films after integration of pristine/modified CNCs. Water contact angle decreased and water vapor transmission rate increased with CNC esterification in CH. Mechanical properties showed the highest tensile strength in dry conditions and the opposite trend for elongation at break. TGA analysis suggested slight improvement in thermal stability.
Article
Engineering, Chemical
Mykola V. Nikolenko, Viktoriia D. Myrhorodska-Terentieva, Yuriy Sakhno, Deb P. Jaisi, Blaz Likozar, Andrii Kostyniuk
Summary: The kinetics of amylose leaching was studied in isothermal conditions at temperatures of 62-90℃ for native and modified starches. The activation energy for amylose leaching was found to be 192.3 kJ/mol for native starch at 62-70℃, and it decreased to 22 kJ/mol at 80-90℃. Similar patterns were observed for modified starches. The change in activation energy was attributed to the transition of the leaching process from the kinetic to the diffusion mode.
Article
Engineering, Chemical
Robert Hren, Katerina Naumoska, Urska Jug, Lidija Cucek, Blaz Likozar, Uros Novak, Annamaria Vujanovic
Summary: Japanese knotweed is an invasive alien plant species that rapidly expands in Europe and North America and is resistant to extermination. It causes significant ecological and economic damage by displacing native biodiversity and damaging infrastructure. Various techniques, such as chemical, biological, or mechanical methods, are used to eradicate the plant, with excavation being the preferred technique due to the extraction of high-value biocompounds. An environmental impact assessment of the extraction route for Japanese knotweed rhizome bark is conducted, showing that pilot-scale production has lower environmental burdens than lab-scale alternative mainly due to electricity requirements.
Article
Chemistry, Physical
Venkata D. B. C. Dasireddy, Natasa Zabukovec Logar, Janez Kovac, Blaz Likozar
Summary: The effect of oxygen mobility and nature in the V2O5-WO3/TiO2 catalyst on n-butane oxidative dehydrogenation was studied. The presence of NO resulted in high selectivity towards butadiene. The co-existence of O-2/NO favored butadiene production, and the presence of oxygen in the catalyst lattice promoted the insertion of oxygen into the lattice, leading to increased butadiene synthesis yield.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)