Review
Chemistry, Physical
Thi Thu Le, Claudio Pistidda, Van Huy Nguyen, Pardeep Singh, Pankaj Raizada, Thomas Klassen, Martin Dornheim
Summary: This review discusses the progress in using metal hydrides and complex metal hydrides as solid-state hydrogen storage materials, as well as improving their performance through nanoconfinement. Researchers believe that magnesium hydride and lithium borohydride are promising solid-state hydrogen storage materials, but issues of thermodynamic stability and kinetics need to be addressed.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Wen Zhu, Li Ren, Chong Lu, Hao Xu, Fengzhan Sun, Zhewen Ma, Jianxin Zou
Summary: This study introduces a novel method to address the stacking and oxidation issues of MXenes in nanoconfinement, successfully achieving the anchored growth of MgH2 nanoparticles on the surface of 3D Ti3C2Tx, leading to improved hydrogen sorption performances.
Article
Nanoscience & Nanotechnology
Qiwen Lai, Chulaluck Pratthana, Yuwei Yang, Aditya Rawal, Kondo-Francois Aguey-Zinsou
Summary: The thermodynamic behavior of complex borohydrides confined in mesoporous hollow carbon spheres was investigated, showing no variation of equilibrium plateau pressure upon changes in the hydrogen sorption temperatures. This is interpreted as a result of the high pressure within the carbon nanopores, providing a means to control the thermodynamics of nanosized hydrides.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Chulaluck Pratthana, Yuwei Yang, Aditya Rawal, Kondo-Francois Aguey-Zinsou
Summary: In this study, hollow carbon nano-spheres were used as a porous scaffold to confine LiAlH4 via solvent impregnation method. The nanoconfined LiAlH4@HCNs showed significant improvements in hydrogen sorption compared to its bulk counterpart.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Kevin Turani-I-Belloto, Carlos A. Castilla-Martinez, Didier Cot, Eddy Petit, Sofian Benarib, Umit B. Demirci
Summary: Ammonia borane NH3BH3 can be nano sized by confinement into various materials, showing improved dehydrogenation properties. Challenges and opportunities in developing nanosized ammonia borane are discussed to gain a better understanding of its potential.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Md A. Wahab, Mohammad R. Karim, Fahad S. Al-Mubaddel, Ibrahim A. Alnaser, Geoffrey Will, Ahmed Abdala
Summary: This study investigates the synergistic effects of sub-5 nm Fe nanoparticles supported on mesoporous carbon for catalyzing hydrogen storage properties of Mg(BH4)2. The study compares two methods for dispersing Fe NPs in MC and finds that the ultrasonication nanoconfinement method can effectively disperse the FeNPs and confine the MBH, resulting in improved hydrogen desorption properties. The study demonstrates the promising application of ultrasonication-mediated nanoconfined Fe NPs in mesoporous carbon for enhancing the hydrogen storage properties of metal-based hydrides.
JOURNAL OF ENERGY STORAGE
(2023)
Review
Crystallography
Cezar Comanescu
Summary: Energy production, distribution, and storage are crucial for various applications in our daily lives, such as renewable energy systems, electric vehicles, and consumer electronics. Hydrogen is the only element that promises high energy, emission-free, and sustainable energy, and metal hydrides have been explored as promising materials for this purpose. However, metal hydrides have limitations in terms of kinetics, operating temperatures, recyclability, stability, and environmental concerns. Nanotechnology offers a strategy to overcome these limitations by embedding reactive hydride compounds in nanosized graphene supports.
Article
Materials Science, Multidisciplinary
Yanghuan Zhang, Wei Zhang, Xin Wei, Zeming Yuan, Jingliang Gao, Shihai Guo, Huiping Ren
Summary: The addition of TiO2 in magnesium based materials improves the efficiency of mechanical milling and enhances the hydrogen storage performance, especially in the as-milled (x = 5) alloy. The alloy exhibits an amorphous and nanocrystalline structure, and the TiO2 content has a slight effect on the thermodynamic properties of the alloys. The optimal hydrogen storage property is shown in the as-milled (x = 5) alloy due to its minimum dehydrogenation apparent activation energy.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Chengxiang Zhu, Ming Chen, Miaomiao Hu, Donghui He, Yijin Liu, Tong Liu
Summary: The Mg-Nb@C nanocomposite was synthesized using reactive gas evaporation method, showing excellent hydrogen adsorption and desorption performance. Small Mg particles with Nb catalyst effectively improved the hydrogen sorption kinetics.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Xin Wei, Wei Zhang, Hanfeng Sun, Zeming Yuan, Qilu Ge, Yanghuan Zhang, Yan Qi
Summary: In this study, Mg95-xAl5Yx (x = 0-5) composites were successfully prepared to improve the sluggish kinetics and poor thermodynamics of Mg-based materials. The substitution of Y for Mg resulted in the formation of second phase Mg24Y5 and improved thermal stability. Additionally, the initial decomposition temperature of the Mg-Al-based alloy could be significantly reduced by the addition of yttrium.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
Li Ren, Wen Zhu, Yinghui Li, Xi Lin, Hao Xu, Fengzhan Sun, Chong Lu, Jianxin Zou
Summary: In this study, 2D TiO2 nanosheets with abundant oxygen vacancies were used to fabricate a flower-like MgH2/TiO2 heterostructure with enhanced hydrogen storage performances. The heterostructure exhibited improved hydrogen desorption temperature, desorption rate, and capacity retention. The synergistic effects of multi-valance of Ti species, accelerated electron transportation caused by oxygen vacancies, formation of catalytic Mg-Ti oxides, and stabilized MgH2 NPs confined by TiO2 nanosheets contributed to the high stability and kinetically accelerated hydrogen storage performances of the composite. The strategy of using 2D substrates with abundant defects to support nano-sized energy storage materials to build heterostructure is promising for the design of high-performance energy materials.
NANO-MICRO LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Wei Chen, Lei You, Guanglin Xia, Xuebin Yu
Summary: By utilizing Co-doped nanoporous carbon scaffolds as a structural host, this study successfully enhanced the hydrogen storage performance of NaAlH4 by removing Co nanoparticles to improve the catalytic effect and stability of nanoconfined spaces, achieving lower hydrogen storage temperature and higher cyclic stability.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Yanghuan Zhang, Hanfeng Sun, Wei Zhang, Zeming Yuan, Xin Wei, Jinliang Gao, Huiping Ren
Summary: This study focuses on investigating the effect of Ce partial substitution of La on the comprehensive hydrogen storage performances of La10-xCexMg80Ni10 alloys. It was found that the presence of Ce in the alloys resulted in grain refinement and decreased stability of the hydride, leading to lower dehydrogenation temperature and enthalpy. Additionally, the dehydrogenation activation energy of the alloys was distinctly reduced by composition adjustment, indicating improved hydrogen storage performances.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nanoscience & Nanotechnology
YongJun Cho, ShinYoung Kang, Brandon C. Wood, Eun Seon Cho
Summary: Nanoencapsulation using graphene derivatives allows the fabrication of two-dimensional nanocomposites with unique microstructures. This study focuses on using B-doped and N-doped graphene as nanoencapsulation media to alter the hydrogen storage kinetics of graphene-Mg composites. The addition of foreign nonmetal elements improves hydrogen uptake and accelerates absorption kinetics through charge transfer and surface deformation of Mg nanoparticles.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Chaochao Dun, Sichi Li, Linfeng Chen, Robert D. Horton, Mark D. Allendorf, Brandon C. Wood, Vitalie Stavila, Jeffrey J. Urban
Summary: A novel nanoconfined Li2Mg(NH)(2)@reduced graphene oxide (rGO) composite is developed with a minimum weight penalty of only 2 wt.%. The presence of rGO improves the kinetics of dehydrogenation and enhances the reversible hydrogen storage performance of the metal amide.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Energy & Fuels
David Michael Dreistadt, Julian Puszkiel, Jose Maria Bellosta von Colbe, Giovanni Capurso, Gerd Steinebach, Stefanie Meilinger, Thi-Thu Le, Myriam Covarrubias Guarneros, Thomas Klassen, Julian Jepsen
Summary: In this paper, a gas-to-power (GtoP) system for power outages is digitally modeled and experimentally developed. The system consists of a solid-state hydrogen storage system and an air-cooled fuel cell, demonstrating fast, stable, and reliable responses.
Article
Energy & Fuels
Allan J. M. Araujo, Francisco J. A. Loureiro, Laura I. Holz, Vanessa C. D. Graca, Joao P. F. Grilo, Daniel A. Macedo, Carlos A. Paskocimas, Duncan P. Fagg
Summary: This article analyzes the electrode performance of misfit-layered calcium cobaltite as a cathode and anode for solid oxide fuel cell and solid oxide electrolysis cell, respectively, using electrochemical impedance spectroscopy. The addition of Ce0.8Gd0.2O2-delta as a composite electrode phase significantly improves the electrochemical processes and reduces the polarization resistance. Short-term stability testing demonstrates that the composite material shows stable current density and no observable microstructure delamination at 700°C.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
D. Pukazhselvan, David Alexandre Reis Silva, K. S. Sandhya, Sara Fateixa, Aliaksandr Shaula, Helena Nogueira, Igor Bdikin, Duncan Paul Fagg
Summary: This study demonstrates the transformation of zirconia additive into zirconium hydride and its significant impact on lowering the dehydrogenation temperature of magnesium hydride. The results provide evidence of the chemical transformation of zirconia and support the formation of an active in situ product, zirconium hydride, which enables low temperature dehydrogenation of magnesium hydride. The study also highlights the dispersion of tiny nanoparticles on the surface and the formation of highly active in situ nanocatalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Allan J. M. Arajo, Francisco J. A. Loureiro, Joao P. F. Grilo, Daniel A. Macedo, Carlos A. Paskocimas, Duncan P. Fagg
Summary: This study investigates the electrochemical properties of composite electrodes of Ba2Co9O14/Ce0.8Gd0.2O2-delta (BCO/CGO) and finds that the composite with 50% vol CGO exhibits a significantly lower polarisation resistance at 600 degrees C. This is attributed to the increased triple-phase boundary length resulting from enhanced percolation of both phases. The findings present a high-performing oxygen electrode for solid oxide electrochemical systems.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Green & Sustainable Science & Technology
Luis Alves, Laura I. Holz, Celina Fernandes, Paulo Ribeirinha, Diogo Mendes, Duncan P. Fagg, Adelio Mendes
Summary: This article provides an overview of various technologies for NOx and N2O emissions mitigation, including selective catalytic reduction, catalytic decomposition, and selective non-catalytic reduction. These technologies have limitations, which has spurred interest in the development of new strategies. Electron beam irradiation and electrochemical reduction are identified as promising technologies with potential for innovation in this field.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Energy & Fuels
Zinaida Shakel, Francisco J. A. Loureiro, Isabel Antunes, Sergey M. Mikhalev, Duncan P. Fagg
Summary: Liquid phase sintering (LPS) is widely used to lower the sintering temperature of proton-conducting ceramics. However, it negatively affects the bulk conductivity of the material. In this study, different sintering strategies were compared and it was found that the Two-step approach minimized the impact of the sintering additive and maintained a higher hydration capacity. However, this approach led to lower bulk conductivity and higher grain boundary conductivity. This work provides new insights for further studies on improving conductivity.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Erika Michela Dematteis, Jussara Barale, Giovanni Capurso, Stefano Deledda, Magnus H. Sorby, Fermin Cuevas, Michel Latroche, Marcello Baricco
Summary: Hydrogen, an efficient energy carrier produced from renewable sources, plays a vital role in the transition towards CO2-free energy. This study focuses on Ti-rich Ti(Fe,Mn)0.90 alloys and their deuterides, determining their crystal structure and analyzing the influence of Mn substitution on structural properties during reversible deuterium loading. The research provides valuable insights into hydrogen storage, structural knowledge, and the application of TiFe-type alloys in integrated hydrogen tank for energy storage systems.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Environmental
A. M. Neves, J. Puszkiel, G. Capurso, J. M. Bellosta von Colbe, T. Klassen, J. Jepsen
Summary: In this study, a comprehensive kinetic model was developed using the separable variable method to describe the dehydrogenation behavior of MgH2 and LiBH4 under different operative conditions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Rafael A. Raimundo, Vinicius D. Silva, Luciena S. Ferreira, Francisco J. A. Loureiro, Duncan P. Fagg, Daniel A. Macedo, Uilame U. Gomes, Rodinei M. Gomes, Marcio M. Soares, Marco A. Morales
Summary: This work investigates the magnetic behavior and electrocatalytic properties of CoFe2/CoFe2O4 composite and CoFe2 alloy obtained through proteic sol-gel synthesis. The samples were characterized using microscopy, XRD, Mossbauer spectroscopy, and magnetometry. The results show that both samples exhibit promising magnetic properties and demonstrate good electrochemical stability for the oxygen evolution reaction (OER). These materials based on transition metals, Co and Fe, have great potential in energy storage and conversion systems due to their high performance and low cost.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Applied
Francesco Andreatta, Alfredo Rondinella, Matteo Zanocco, Giovanni Capurso, Roberto Vendramin, Alessandro Guarino, Lorenzo Fedrizzi
Summary: This study investigates the use of graphene in polyester powder coatings on aluminium alloy AA6060. The coatings exhibit high barrier properties, electrical conductivity, and thermal conductivity. Graphene contents up to 10 wt% were added to the composite powder coatings. Electrochemical impedance spectroscopy was used to assess the barrier properties and electrical parameters of the coatings. The results showed that the introduction of graphene above 1 wt% led to an increase in coating capacitance and a decrease in coating resistance, indicating the presence of graphene-rich agglomerates in the coatings. Additionally, preliminary evaluation showed that the incorporation of graphene improved heat dissipation in the coatings.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Chemistry, Applied
Alfredo Rondinella, Ruben Offoiach, Francesco Andreatta, Giovanni Capurso, Luigi Calabrese, Edoardo Proverbio, Lorenzo Fedrizzi
Summary: In this study, a warning system using electrochemical impedance spectroscopy (EIS) measurements was developed to monitor the service status of organic coatings over large areas. The repeatability of measurements on surfaces with gradually increasing size was verified. A threshold value of normalized impedance modulus was set as a detectable warning signal for testing and maintenance of protective organic coatings. The monitoring lasted for nearly two years, validating the threshold value for long immersion times. The introduction of a defect could be easily detected through this system and the results were not significantly affected by disturbing factors. Additionally, a portable potentiostat was found to equally discern the state of protection of the organic coating, making the measurement system suitable for monitoring coated surfaces used in the naval industry.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Chemistry, Physical
Thayse R. Silva, Rafael A. Raimundo, Vinicius D. Silva, Jakeline Raiane D. Santos, Luciena S. Ferreira, Allan J. M. Araujo, Francisco J. A. Loureiro, Fausthon F. da Silva, Duncan P. Fagg, Daniel A. Macedo
Summary: This research presents a simplified sol-gel method combined with an adapted hydrothermal process to synthesize MnCo2O4 nanoparticles on nickel foam catalyst. The catalyst possesses a large surface area and the absence of binders promotes adhesion of the active material, which boosts the electrocatalytic reactions. The structural, microstructural, and surface properties of the MnCo2O4 electrode are studied through XRD, FESEM, TEM, FTIR, Raman, and XPS analysis. The electrode exhibits excellent electrochemical stability, with an overpotential of 296 mV (at 25 mA cm-2 current density) and a Tafel slope of 82 mV dec � 1, indicating its great potential for future applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Energy & Fuels
Vanessa C. D. Graca, Laura I. V. Holz, Allan J. M. Araujo, Francisco J. A. Loureiro, Duncan P. Fagg
Summary: To address the urgent need for alternative energy transfer methods, Proton Ceramic Membrane Reactors (PCMRs) are being investigated as a clean alternative for energy production and chemical synthesis. This study focuses on using niobium (oxy)nitride with proton ceramic conducting materials as a new composite electrode for PCMRs applications, specifically in the synthesis and fuel use of ammonia. The chemical compatibility and thermal stability of the composite electrode material were assessed, and the electrode mechanism under hydrogenation/de-hydrogenation conditions was studied using electrochemical impedance spectroscopy.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Zinaida Shakel, Francisco J. A. Loureiro, B. M. G. Melo, D. Pukazhselvan, Sergey M. Mikhalev, Aliaksandr L. Shaula, Duncan P. Fagg
Summary: This work provides a detailed analysis of the electrochemical properties of lithium titanium phosphate grain boundary in all-solid-state lithium-ion batteries. The addition of boron significantly improves both the bulk and grain boundary conductivities due to Li-enrichment associated with charge compensation for the boron doping. Detailed analysis using the brick layer model and space charge analysis reveals a lower depletion of Li+ species at the grain boundary of the boron-doped sample, leading to a higher intrinsic grain boundary conductivity and overall conductivity.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Materials Science, Multidisciplinary
Vanessa C. D. Graca, Laura I. V. Holz, Francisco J. A. Loureiro, Glenn C. Mather, Duncan P. Fagg
Summary: In recent years, there has been increasing interest in transition metal oxynitrides due to their attractive properties, such as high conductivity, hardness, and catalytic activity. Among them, niobium oxynitrides have shown great potential for various applications. This study focuses on the impact of ammonolysis conditions on the crystalline phase formation of niobium oxynitride compounds. The results demonstrate that careful control of ammonolysis conditions can tailor the anion composition, cation/anion ratio, and crystallographic structure of the materials.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
