Article
Engineering, Environmental
Geo Jong Kim, Hyun Tae Hwang
Summary: Hydrogen from sodium borohydride can be generated by thermolysis or hydrolysis, but both methods have drawbacks such as high temperatures required or safety concerns. A new process, thermal hydrolysis of SBH, is proposed to address these issues and achieve efficient hydrogen production.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Chemistry, Physical
Umit B. Demirci
Summary: Sodium borohydride (NaBH4) has been considered as a promising hydrogen storage material, but its hydrolysis still faces numerous obstacles. This article aims to assess the progress made in hydrolysis of NaBH4 and summarize the newly acquired knowledge.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Kaaviah Manoharan, Vasantha Kumar Palaniswamy, Kannan Raman, Rajashabala Sundaram
Summary: This study focuses on the effective storage of hydrogen using NaBH4/Ah-BN nanocomposite, which shows enhanced specific surface area and favorable binding energy for hydrogen storage. Thermal analysis confirms a two-step dehydrogenation process, while electrochemical testing reveals high discharge capacity and hydrogen storage efficiency. Overall, the prepared NaBH4/Ah-BN nanocomposite demonstrates promising potential as a hydrogen storage system and electrode material for hydrogen fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Kaicheng Xian, Bo Nie, Zigen Li, Mingxia Gao, Zhenglong Li, Congxiao Shang, Yongfeng Liu, Zhengxiao Guo, Hongge Pan
Summary: A synergetic approach was developed to improve the properties of lithium borohydride (LiBH4) for solid-state hydrogen storage, by constructing an active porous core-shell network structure with optimized TiO2 fraction, enabling effective confinement of LiBH4 and enhancement of hydrogen sorption properties.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Jikai Ye, Guanglin Xia, Xuebin Yu
Summary: By reacting graphene-wrapped Al with LiBH4, this study achieved the destabilization of LiBH4, improving the reaction efficiency between LiBH4 and Al and demonstrating complete dehydrogenation and hydrogenation of LiBH4.
MATERIALS TODAY ENERGY
(2021)
Article
Chemistry, Physical
Amanda Berger, Ainee Ibrahim, Craig E. Buckley, Mark Paskevicius
Summary: Due to insufficient resources, high cost, and safety concerns of Li-ion batteries, alternative technologies are being explored. Multivalent metal batteries with solid-state electrolytes show potential for future battery applications. Divalent hydrated closo-monocarborane salts demonstrate improved ionic conductivity and oxidative stability as solid-state electrolytes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Review
Energy & Fuels
Luckywell Seyitini, Basim Belgasim, Christopher Chintua Enweremadu
Summary: Cost effective heat storage methods can promote the utilization of solar thermal and heat recovery systems for industrial applications, reducing the use of conventional heat sources. Solid state sensible thermal energy storage (TES) systems, especially those using natural stones as heat storage media, have been shown to be a viable option due to their low cost, local availability, and environmental friendliness. This study reviews the state of research on solid state sensible heat storage systems, including the materials used, numerical and experimental evaluations, and environmental impact. Further research is needed to improve thermal performance and durability of solid-state TES systems and characterize thermal properties of natural solid materials for heat storage purposes.
JOURNAL OF ENERGY STORAGE
(2023)
Review
Chemistry, Physical
Mirela Dragan
Summary: This literature review discusses the challenges and obstacles of sodium borohydride hydrolysis, and presents various catalysts and reactor systems for hydrogen generation. Although promising, there are still challenges to be addressed.
Article
Chemistry, Physical
O. V. Netskina, E. S. Tayban, V. A. Rogov, A. M. Ozerova, S. A. Mukha, V. I. Simagina, O. V. Komova
Summary: In the study, it was found that cobalt catalysts are more active than nickel catalysts in the hydrolysis of sodium borohydride. One reason for the lower activity of nickel catalysts is the presence of hydrogen on its surface, which interferes with reactant adsorption. The addition of cobalt to nickel catalysts can enhance hydrogen generation rate.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Mariya Shchelkanova, Georgiy Shekhtman, Svetlana Pershina, Emma Vovkotrub
Summary: The sodium-vanadium oxide NaV3O8 was synthesized via solid-state method, and its properties and conductivity were characterized. The results showed that NaV3O8 has a relatively high conductivity, and various testing methods were used for material characterization and performance comparison.
Article
Chemistry, Physical
Haizhen Liu, Li Xu, Yu Han, Xin Chen, Peng Sheng, Shumao Wang, Xiantun Huang, Xinhua Wang, Chenglin Lu, Hui Luo, Shixuan He, Zhiqiang Lan, Jin Guo
Summary: A gaseous and solid-state (G-S) hybrid hydrogen storage system has been developed with a high volumetric hydrogen storage density and energy storage efficiency. It combines gas and solid-state hydrogen storage technologies to store hydrogen at low working pressure, showing promise for stationary hydrogen storage applications.
GREEN ENERGY & ENVIRONMENT
(2021)
Article
Chemistry, Physical
V. P. Vasiliev, O. V. Kravchenko, M. V. Solovev, A. S. Zyubin, T. S. Zyubina, A. A. Zaytsev, A. V. Shikhovtsev, L. N. Blinova, Y. A. Dobrovolsky
Summary: In this study, a comparison is made on the composition and properties of Mg(BH4)2(NH3)n (n = 1, 2, 3) complexes obtained through different synthesis methods, and a systematic analysis is carried out on the thermal decomposition characteristics and gas composition released.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Jae Seon Koh, Do Hoon Kim, Se Hyeok Lee, Min Soo Kim
Summary: The aim of this study was to produce sufficient hydrogen for high-power fuel cell applications through acid-accelerated hydrolysis of sodium borohydride (SBH) with liquid water. The experimental results showed that the conversion of SBH was >= 95%, and a maximum of 6.71 wt% gravimetric hydrogen density was achieved. It was also found that the rate of hydrogen generation could be controlled through the feed injection rate, and the reactant temperature and excess stoichiometric number had significant effects on the hydrogen production.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Polymer Science
Ahmed Abutaleb
Summary: Non-noble CuxNi1-x (x = 0, 0.1, 0,2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1) alloy nanoparticles supported on PVDF-HFP nanofibers were successfully fabricated through electrospinning and in situ reduction. The catalysts exhibited the formation of bimetallic NiCu alloy supported on PVDF-HFP and showed better catalytic activity for SBH hydrolysis compared to monometallic counterparts. The Cu-0.7 Ni-0.3/PVDF-HFP catalyst demonstrated the best catalytic performance with low activation energy and satisfying stability.
Article
Materials Science, Multidisciplinary
Hao-Cheng Thong, Alexis Payne, Jia-Wang Li, Yue-Yu-Shan Cheng, Jacob L. Jones, Ke Wang
Summary: The excellent piezoelectric properties of lead-free potassium sodium niobate (KNN) ceramics have been reported in the past 15 years, but the poor reproducibility of these properties has hindered industrial development due to a lack of understanding of processing aspects. Chemical inhomogeneity during processing is a critical challenge for KNN-based ceramics, as their properties are strongly dependent on composition. In this study, in-situ temperature-dependent X-ray diffraction and thermogravimetric analysis were used to investigate chemical reactions during solid-state synthesis, revealing that chemical homogeneity is sensitive to reactant competition, explaining the chemical inhomogeneity in KNN and other lead-free piezoelectric ceramic systems prepared via solid-state synthesis.
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)