ENERGY
·
2017
·
IF 4.52
J. Yan,C.Y. Zhao,Z.H. Pan
Cyclic stability is a key factor in the design of thermochemical heat storage systems . Because carbon dioxide (CO 2 ) may react with heat storage materials and lead to a decrease in energy storage efficiency, the effect of CO 2 on Ca(OH) 2 /CaO and Mg(OH) 2 /MgO systems is investigated in this study. The experimental results show that CO 2 reacts with CaO in the water vapor that appears during the heat release process. Therefore, in the design of Ca(OH) 2 /CaO systems, CO 2 should be cleared from the system. The results from Mg(OH) 2 /MgO systems show that CO 2 only slightly reacts with MgO and Mg(OH) 2 during heat storage and release processes. This study indicates that carbonic acid (H 2 CO 3 ) could easily react with CaO/Ca(OH) 2 to form CaCO 3 during heat release processes. Generally, the remaining CO 2 reduces the reversibility of Ca(OH) 2 /CaO systems but has only a slight influence on Mg(OH) 2 /MgO systems. In addition, the experimental results show that carbonate shell does not exist in rehydration for both of the CaO/MgO samples, but the influence of CO 2 on the entire process increases after each cycle.
研究领域:
材料科学
·
能源工程
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DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2026
·
IF 7.3
Wancheng Ge,Yongqiang Zhang,Shufang Zhang,Rongfang Zhao,Man Xiao,YuRou Qiu,Dizhu Yue,Rongfa Zhang
Although Mg alloys exhibit excellent application prospects in some areas where lightweighting is very critical, their poor corrosion resistance severely restricts their engineering applications. In this study, a near-neutral pH solution mainly containing hexamethylenetetramine (HMTA), sodium phytate, K 2 ZrF 6 , Na 2 B 4 O 7 and Na 3 PO 4 was selected and MAO coatings were successfully prepared on WE43 Mg alloys by micro-arc oxidation (MAO) under different constant voltages. The fabricated MAO sample under 520 V achieves good corrosion resistance and its i corr value is three orders of magnitude lower than that of Mg substrate. Then, the corrosion inhibition behavior and the underlying mechanism of electrolytic components on Mg alloys were systematically investigated. The results elucidate, for the first time, that before MAO treatment, Mg substrate is initially corroded and then the micro-corrosion areas are healed by the MAO solution through adsorption stage, chemical reaction stage and surface deposition stage. Before MAO treatment, all electrolytic components synergistically passivate the Mg substrate. Among four electrolytic components, the anticorrosive ability on WE43 Mg alloys is ranked as 360 g/L HMTA >5 g/L Na 3 PO 4 > 2 g/L K 2 ZrF 6 > 12 g/L sodium phytate. These results will provide a basis for future screening of suitable electrolytes and the preparation of high corrosion-resistant coatings.
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Minghong Huang,Liuzhang Ouyang,Jiangwen Liu,Hui Wang,Huaiyu Shao,Min Zhu
In this work, flower-like MoS 2 spheres are synthesized via a hydrothermal method and the catalytic activity of the as-prepared and bulk MoS 2 on hydrolysis of Mg is systematically investigated for the first time. The Mg-MoS 2 composites are prepared by ball milling and the hydrogen generation performances of the composites are investigated in 3.5% NaCl solution. The experimental results suggest that the as-prepared MoS 2 exhibits better catalytic effect on hydrolysis of Mg compared to bulk MoS 2 . In particular, Mg-10 wt% MoS 2 (as-prepared) composite milled for 1 h shows the best hydrogen generation properties and releases 90.4% of theoretical hydrogen generation capacity within 1 min at room temperature. The excellent catalytic effect of as-prepared MoS 2 may be attributed to the following aspects: three-dimensional flower-like MoS 2 architectures improve its dispersibility on Mg particles; make the composite more reactive; hamper the generated Mg(OH) 2 from adhering to the surface of Mg; and increase the galvanic corrosion of Mg. In addition, a hydrogen generator based on the hydrolysis reaction of Mg-0.2 wt% MoS 2 composite is manufactured and it can supply a maximum hydrogen flow rate of 2.5 L/min. The findings here demonstrate the as-prepared flower-like MoS 2 can be a promising catalyst for hydrogen generation from Mg.
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DOI
高影响因子
JOURNAL OF HYDROLOGY
·
2026
·
IF 6.3
Bowen Li,Tingting Yang,Shibin Liu,Meng Yao,Jun Dong
The uneven distribution of colloidal Mg(OH) 2 in heterogeneous porous media poses a significant challenge for its effective application in groundwater remediation. To address this issue, this study introduces a novel approach using xanthan gum (XG) as a viscosity modifier to enhance the migration of colloidal Mg(OH) 2 into low permeability zone. Results indicate that XG is highly compatible with colloidal Mg(OH) 2 , viscosity modified colloidal Mg(OH) 2 (VMC-Mg(OH) 2 ) exhibits significant shear thinning properties. The increased viscosity effectively reduces the deposition of colloidal Mg(OH) 2 and facilitates its return to groundwater. With the addition of XG to the system, the collision efficiency ( η ) between colloidal Mg(OH) 2 and porous media decreased from 0.00865 to 0.00142, while the attachment efficiency ( α ) was reduced from 0.4858 to 0.1038. These variations notably enhance the migration performance of colloidal Mg(OH) 2 , with C/C 0 increasing from 0.12 to 0.94. The incorporation of XG also leads to a substantial increase in colloidal Mg(OH) 2 sweep efficiency in low permeability zone, rising from 53.6 % to 92.5 % as the XG concentration increased from 0 mg/L to 200 mg/L. Moreover, the simulation of collision efficiency ( η ) and attachment efficiency ( α ) accurately predicts the migration of VMC-Mg(OH) 2 in heterogeneous porous media, with a maximum error of 5.39 %. These findings highlight the significant potential of VMC-Mg(OH) 2 as a reactive reagent for remediating contamination in low permeability zone
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产品关联
DOI
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2017
·
IF 4.396
Huimin Xu,Zhonghua Zhang,Zili Cui,Aobing Du,Chenglong Lu,Shanmu Dong,Jun Ma,Xinhong Zhou,Guanglei Cui
Herein we present a strong anion receptor-assisted Mg-ion electrolyte, which is synthesized from tris(2H-hexafluoroisopropyl) borate (THFPB) and MgO in 1,2-dimethoxyethane (DME). The as-prepared borate magnesium oxide complex (BMOC) electrolyte delivers exceptional electrochemical performances, including extremely high anodic stability (up to 4.2 V vs. Mg), non-corrosivity to stainless steel and aluminium foils , and reasonable ionic conductivity of 1.74 × 10 − 4 S cm − 1 . In addition, by virtue of the non-nucleophilic characteristic of the BMOC electrolyte, S ||BMOC ||Mg cells have been assembled, which show a high stable discharge capacity of 1030 mAh g − 1 for 15 cycles and one well-defined voltage plateau of ≈ 1.1 V vs. Mg, yielding a desirable energy density beyond 1100 Wh kg − 1 based on the weight of sulfur in cathodes.
研究领域:
电化学
·
储能
·
材料科学
·
电池技术
·
无机化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Zan Jiang,Jianguang Yuan,Huanqing Han,Ying Wu
As an important member of complex hydrides , Mg(BH 4 ) 2 has a high gravimetric capacity (14.9 wt%). In this study, the Mg(BH 4 ) 2 was synthesized by the ion exchange method. Afterwards, the Mg(BH 4 ) 2 composites with different amounts (2, 5, 10, 25 and 50 wt%) of carbon nanotubes (CNTs) were prepared by mechanical milling. Effects of the CNTs on the microstructural evolution and hydrogen storage properties were investigated. The onset desorption temperature of the Mg(BH 4 ) 2 -5 wt% CNTs is decreased to lower temperature around 120 °C from 275 °C. The desorption plateau of Mg(BH 4 ) 2 -5 wt% CNTs is the highest, which ascribes that CNTs causes the reaction pathway change. Additionally, the Mg(BH 4 ) 2 -5 wt% CNTs shows the best dehydriding kinetics properties, and can desorb 6.04 wt% hydrogen within 2000 s at 300 °C. The dehydrogenation activation energy of the Mg(BH 4 ) 2 -5 wt% CNTs is decreased to 130.2 kJ/mol H 2 , which is much lower than that of pure Mg(BH 4 ) 2 .
研究领域:
材料科学
·
无机化学
·
能源材料
·
纳米材料
·
固态储氢
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DOI
高影响因子
Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·291
·
IF 38.5
Shi Yuan,Zhang Ziyi,Bai Lei,Li Dingding,Shi Jingbo,Yue Zongye,Yuan Tianyu,Bai Jinbo,Bai Jintao,Leng Kunyue,Li Xiaolin,Wang Xuejing,Qu Yunteng
Metal–nitrogen–carbon catalysts have emerged as promising alternatives to costly platinum group catalysts in fuel cells and metal–air batteries; however, further enhancement of their activity in both alkaline and acidic media is still required. Here, we present a FeMg–N–C dual-atom catalyst that demonstrates excellent oxygen reduction reaction (ORR) performance, achieving notably high half-wave potentials (E 1/2 ) of 1.004 V in alkaline media and 0.881 V in acidic media. Additionally, the FeMg–N–C catalyst delivers peak power densities of 530.1 mW cm −2 in Zn–air cells and 1.06 W cm −2 in H 2 –O 2 fuel cells. Experimental and theoretical analyses reveal that the enhanced ORR activity arises from the spin state transition of Fe sites from low spin to medium spin, induced by adjacent Mg sites. This medium-spin Fe site exhibits strong adsorption of *O 2 and weak adsorption of *OH, effectively facilitating the initial ORR step and the removal of *OH. This work paves a novel pathway to design and construct well-performing electrocatalysts via the spin regulation strategy.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Chaoying Zhang,Qian Jia,Guoqiang Li,Feng Li,Haitao Cui,Congming Li,Lei Li
An ultramicroporous variant of Mg-MOF-74 is synthesized through a mixed-linker strategy incorporating ethylenediaminetetraacetic acid (EDTA) as exotic linker. • An exclusive H 2 O adsorption site is created based on the uncoordinated oxygen atoms of EDTA. • The hydrogen-bonding network within EDTA-modified frameworks enhances CO 2 adsorption by 14.3 % via the formation of carbonates. • Incorporating EDTA molecules increases the CO 2 /N 2 selectivity by a factor of 2.28 compared to pristine Mg-MOF-74. • The EDTA-modified Mg-MOF-74 outperforms the pristine Mg-MOF-74 with a two-fold enhancement in CO 2 uptake under humid conditions. Mg-MOF-74 ([Mg 2 (DOBDC)]) represents a high-performance solid adsorbent for carbon capture, however, its CO 2 uptake decreases significantly under humid flue gas conditions due to competitive adsorption between H 2 O and CO 2 molecules. Herein, a mixed-linker modification strategy is employed by integrating ethylenediaminetetraacetic acid (EDTA) into the Mg-MOF-74 framework. This approach preserves the original one-dimensional pore structure while altering the coordination environment of Mg 2+ sites, reducing their coordination number to five. The resulting structure with uncoordinated oxygen atoms from EDTA serves as exclusive adsorption centers for H 2 O thereby protecting the CO 2 adsorption capacity. The optimized MOFs exhibits a high CO 2 adsorption capacity (6.4 mmol/g, at 1 bar) and outstanding CO 2 /N 2 selectivity (346). In humid CO 2 /N 2 (15:85, v:v, at 314 K, RH% = 86%) breakthrough experiment, the EDTA-modified frameworks maintain stable CO 2 uptake (3.92 mmol/g), consistent with dry performance, whereas the pristine Mg-MOF-74 shows a great reduction (2 mmol/g). In-situ FTIR further reveals that the incorporation of EDTA facilitates the formation of hydrogen bonding and carbonate species, synergistically enhancing the moisture resistance of MOF materials. Moreover, the modified material retains stable breakthrough times over six consecutive adsorption-desorption cycles under high-humidity conditions, demonstrating its great potential for scalable industrial carbon capture applications.
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DOI
高影响因子
Advanced Sustainable Systems
·
2025
·Vol. 9
·期 6
·2500061
·
IF 6.1
Tengfei Wang,Xiaoyang Wei,Keyi Chen,Guyue Li,Zhang Chen,Yanfeng Gao,Chilin Li
Rechargeable magnesium batteries (RMBs) have attracted extensive attention due to the high volumetric capacity and natural abundance of magnesium (Mg) metal anode. However, the Mg metal anode in ether-based electrolyte systems often suffers from surface passivation, leading to the irreversible plating/stripping behavior of Mg. In this work, for the first time, an effective strategy is proposed to modify the Mg metal anode by in situ alloy formation using a chlorine-free organic metal compound, triphenyl bismuth (TPB). Through electrochemical reduction, an Mg-Bi alloy forms uniformly on the Mg metal anode surface, providing abundant nucleation sites for Mg, allowing for smooth and stable Mg deposition and suppressing the occurrence of short circuits. In a 1,2-dimethoxyethane (DME)-based electrolyte system, the addition of TPB significantly improves the electrochemical performance of Mg anode, enabling stable cycling for up to 170 h at a low overpotential. Similarly, in the tetraethylene glycol dimethyl ether (G4) electrolyte system, excellent performance is observed, achieving stable cycling of 240 h. This work confirms the feasibility of using chlorine-free organic metal additives to improve the Mg anode interface and provides new possibilities for enhancing the practical applications of RMBs.
研究领域:
电化学
·
储能
·
材料科学
·
电池技术
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Sikang Wei,Yang Xu,Shihong Tian,Zhaohui Han,Lei Xu
In this study, Al-Mg-Sn-Ga anode material prepared by heating up to 800 °C in microwave field under different powers and heating up to 800 °C in conventional field is compared. The microstructure and corrosion morphology of aluminum alloy anode are observed by electron backscatter diffraction(EBSD) and scanning electron microscopy(SEM), and Tafel polarization curve , electrochemical impedance spectroscopy (EIS) and constant current are characterized by different melting modes. The results are showed that microwave can change the grain orientation of aluminum alloy anode and corrosion forms, compared to the conventional technology, the microstructure of the alloy electrode material can grow preferentially at (001), improve alloy anode electrochemical properties , by pitting corrosion forms into a uniform corrosion , improves the corrosion resistance of the anode and the anode utilization. At the same time, aluminum alloy anode has excellent discharge performance under microwave 2000 W treatment. The energy density and capacity density are 2729.3 Wh·kg −1 and 2596.6 mAh·g −1 , respectively, which are 44.03% and 42.26% higher than those of conventional muffle furnace melting. Therefore, microwave technology can improve the electrochemical performance by affecting the microstructure of alloy materials.
研究领域:
材料科学
·
电化学
·
金属腐蚀与防护
·
能源材料
·
功能材料
·
冶金工程
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 6
·411
·
IF 3.504
Xin Ye,Zimin Jiang,Linxin Li,Zhi-Hui Xie
NiAl-layered double hydroxide (NiAl-LDH) coatings grown in-situ on AZ31 Mg alloy were prepared for the first time utilizing a facile hydrothermal method. The surface morphologies, structures, and compositions of the NiAl-LDH coatings were characterized by scanning electron microscopy (SEM), three dimensional (3D) optical profilometer, X-ray diffractometer (XRD), Fourier transform infrared spectrometer (FT-IR), and X-ray photoelectron spectroscopy (XPS). The results show that NiAl-LDH coating could be successfully deposited on Mg alloy substrate using different nickel salts, i.e., carbonate, nitrate, and sulfate salts. Different coatings exhibit different surface morphologies, but all of which exhibit remarkable enhancement in corrosion protection in 3.5 wt % NaCl corrosive electrolyte. When nickel nitrate was employed especially, an extremely large impedance modulus at a low frequency of 0.1 Hz (|Z|f= 0.1 Hz), 11.6 MΩ cm2, and a significant low corrosion current density (jcorr) down to 1.06 nA cm−2are achieved, demonstrating NiAl-LDH coating’s great potential application in harsh reaction conditions, particularly in a marine environment. The best corrosion inhibition of NiAl-LDH/CT coating deposited by carbonate may partially ascribed to the uniform and vertical orientation of the nanosheets in the coating.
研究领域:
材料科学
·
腐蚀与防护
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DOI
高影响因子
Science China-Technological Sciences
·
2026
·Vol. 69
·期 4
·1420202
·
IF 5.1
Iqbal Mujahid,Yasin Aqeela,Guan Shaokang,Guo Jiacheng,Hou Yachen,Li Jingan,Tang Junnan
Ischemic stroke remains a leading global cause of mortality and disability, creating an urgent need for improved treatments. Biodegradable magnesium (Mg) alloy stents represent a promising advancement for cerebrovascular applications due to their inherent biocompatibility, mechanical suitability, and unique neuroprotective properties conferred by Mg ions. However, the clinical translation of Mg alloy stents, particularly for sensitive cerebral vasculature, is hindered by two major bottlenecks: uncontrolled rapid degradation leading to premature structural failure and delayed endothelialization contributing to restenosis and thrombosis. Addressing the critical issue of biological functionality, this study develops a novel sulfonated hyaluronic acid-tyrosine microsphere (S-HA-Tyr@microsphere) coating on ZE21B Mg alloy. Monodisperse S-HA-Tyr microspheres were precisely fabricated using microfluidics and stabilized via a visible-light catalyzed tris(2,2-bipyridyl)-dichlororuthenium(II)/Sodium persulfate (Ru/SPS) system, forming a robust dityrosine bond network. This multifunctional coating integrates corrosion resistance (primarily achieved through an established MgF 2 interlayer), strong anchoring (PDA layer), and enhanced bioactivity (S-HA-Tyr@microspheres). The S-HA-Tyr@microsphere coating significantly improved hemocompatibility, reducing hemolysis to 0.35% ( p < 0.01) and platelet adhesion by 83.7% ( p < 0.001). Crucially, it promoted endothelial cells (ECs) migration and proliferation ( p < 0.01) while inhibiting smooth muscle cells (SMCs) overgrowth ( p < 0.05) and inducing macrophage M2 polarization ( p < 0.01), demonstrating excellent cell-specific regulation. In vivo evaluation confirmed the efficacy: abdominal aortic implantation in rats for 28 d revealed a superior diameter retention for the coated implants compared to bare alloy ( p < 0.05) and showed continuous endothelium with reduced neointimal formation ( p < 0.01). This innovative coating strategy facilitates both degradation control and accelerated endothelialization, overcoming key biological barriers for the clinical application of biodegradable Mg alloy cerebrovascular stents.
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DOI
高影响因子
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