JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Haiqiang Bai,Biao Liu,Ling Kang,Yanhong Wang,Jing Bai,Santosh Kumar Verma,Yunhua Xu
The ability of magnesium-based hydrogen storage materials to store and release hydrogen is hampered by their relatively slow rates. To address this, Mg-x% Co (x = 5, 10, 15) magnesium-rich hydrogen storage alloys were fabricated using reactive ball milling. The resulting alloys were multiphase, composed of Mg, Co, MgCo₂, and Mg₂CoH₅, which provided nucleation sites and improved hydrogen uptake. The reduced particle size and surface microcracks and pores enhanced hydrogen diffusion. The Mg-15 %Co alloy had the ability to take in 4.72 wt% hydrogen in 1 min when the temperature was set at 350°C. Hydrogenation resulted in the formation of a biphasic structure composed of Mg₂CoH₅ and Mg₆Co₂H₁₁. This structure destabilized the Mg-H bond and improved the kinetics of hydrogen release. The hydrogen release capacity first increased and then decreased with Co content, with Mg-10 %Co showing the best performance. Due to the combined action of ball milling and Co catalysis, the Mg-10 %Co alloy had an activation energy for hydrogen release of 113.65 kJ/mol, making it the alloy with the lowest such activation energy in the set. Differential scanning calorimetry (DSC) analysis confirms that cobalt addition reduces the hydrogen release peak temperature of Mg by 16.58–29.67 °C, with the Mg-10 % Co alloy exhibiting peak temperatures of 410.72–425.53 °C, attributed to synergistic decomposition of MgH₂ with intermediate hydrides like Mg₂CoH₅ and Mg₆Co₂H₁₁. The findings of this study indicate that alloying Mg-based alloys with transition elements while performing ball milling is a practical method for enhancing their hydrogen storage and release kinetics.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Archer Bright,Wuyi Zhang,Kaisong Xiang,Hao Chen,Hui Liu,Jun Wu
CuO-CeO 2 composite catalyst for low temperature CO oxidation was fabricated via an impregnation method. The prepared composite CuO-CeO 2 achieved 50 % and 100 % conversion at approximately ∼ 70℃ and ∼ 110℃ (denoted as T 50 and T 100 ), respectively. The enhanced catalytic activities were attributed to the formation of abundant CuO/CeO 2 heterostructures, which increased the concentration of oxygen vacancies in their lattices. In addition, the pore structure of the CuO-CeO 2 composite has also been optimized during the impregnation synthesis process. Compared with bare CeO 2 , which only possesses micropores, CuO-CeO 2 forms more mesopores on its surface, which assists in reducing the deposition rate of sulfate species on the surface. The SO 2 tolerance of the catalyst and hence its stability towards practical industrial flue gas treatment is significantly promoted. Furthermore, Density Functional Theory (DFT) was also performed to explore the mechanism of CO oxidation on the CuO-CeO 2 . It was found that the oxygen vacancy can be easily formed on the CuO/CeO 2 heterointerfaces; the adsorption energy (ΔG) of CO was therefore decreased to 0.15 eV, much lower than that of bare CeO 2 (0.53 eV). Besides, the center of f electrons of Ce in CeO 2 rises from −0.55 eV to – 1.71 eV by introducing CuO, suggesting that the f electrons in Ce become more active, which is beneficial for CO to adsorb.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2025
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IF 2.9
Zhenyi Chen,Shuo Li,Kun Feng,Zhen Wen,Jun Zhong
Low-level radioactive wastewater containing Co(II)–EDTA generated in the nuclear industry is harmful to the environment, but it is difficult to remove owing to the high stability of metal–organic complexes. Here, we report efficient contact-electro-catalysis (CEC) to achieve the decomplexation of Co(II)–EDTA by using commercial fluorinated ethylene propylene (FEP) powder as a dielectric catalyst. The reaction generated reactive oxygen species through solid–liquid interfacial charge transfer, disrupting the chemical bonds and then oxidizing the central atoms in Co(II)–EDTA to form Co(III)–EDTA with vacancies. The Co(III)–EDTA could be easily removed from the solution under alkaline conditions. The decomplexation efficiency reached a high value of 41.6%, with a constant reaction rate of 0.024 min−1 in 240 minutes. The FEP also exhibited excellent recyclability over 40 h without obvious changes. Unlike conventional advanced oxidation processes, this approach does not require the use of electrodes or chemical oxidants, leading to low energy consumption. This approach also holds great potential for green wastewater management via integration with ambient mechanical energy sources (e.g., wind and hydrostatic pressure).
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PubMed
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DESALINATION
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2025
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IF 9.8
Ya'’nan Zhao,Liyang Zhao,Yi'’na Yang,Tianran Zhao,Chunna Yu,Chang Zhao,Guangjian Xing
Freshwater scarcity and energy shortages stand as two of the most pressing global challenges confronting modern society. The integration of solar-driven interfacial evaporation with the hydrovoltaic effect emerges as a highly promising strategy to address both issues simultaneously. In this study, we report the development of Janus Nb 2 CT X /graphene aerogels (NGAs) specifically engineered to synergistically facilitate solar-driven seawater evaporation and hydrovoltaic power generation. The Janus NGAs were fabricated via a combination of hydrothermal reaction, freeze-drying, and surface modification techniques, yielding a three-dimensional porous architecture with distinct hydrophilic-hydrophobic asymmetry—a key structural feature for their dual-functional performance. Under 1 sun irradiation, the optimized NGA-3 sample achieved a high seawater evaporation rate of 1.64 kg·m −2 h −1 and an exceptional photothermal conversion efficiency of 86.61 %, attributed to the reduced water evaporation enthalpy (1904 kJ·kg −1 ) induced by the formation of intermediate water within the aerogel's porous structure. Meanwhile, the Nb 2 CT X MXene component enhances broadband sunlight absorption through the localized surface plasmon resonance (LSPR) effect, further boosting photothermal conversion. Concurrently, the NGAs exhibit robust hydrovoltaic performance: in NaCl solution, NGA-3 generated a stable output voltage of 147 mV under 1 sun and 236 mV under 3 sun. A peak power density of 197 μW·cm −2 was achieved in 10 wt% NaCl solution, demonstrating its adaptability to high-salinity environments. Additionally, the NGAs maintain excellent salt resistance and long-term operational stability. The synergistic integration of efficient photothermal conversion and electricity harvesting in the Janus NGAs offers a viable solution to alleviate global freshwater and energy pressures.
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ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Liangyuan Chen,Jiangfeng Liu,Jitao Shang,Jin-Xiu Liu,Zhaofu Zhang,Xiaolin Liu,Du Wang,Yan Zhao
The instability of Zn anodes arising from uncontrolled deposition remains a critical bottleneck for zinc-metal batteries. Here, a sustainable Zn/Cu co-deposition strategy is reported via a cost-effective ethanol-based hybrid electrolyte (EtZCL-Cu) containing ZnCl 2 and insoluble Cu(OH) 2 additives. The high Cl − concentration enables continuous Cu 2+ release via complexation-driven Cu(OH) 2 dissolution, facilitating spontaneous Zn/Cu displacement-alloying reactions during cycling. This dynamic reconstruction mechanism ensures long-term exposure of zincophilic Cu sites on the electrodeposited Zn surface, thereby effectively preventing the defunctionalization of zincophilic alloy interfaces. The reconfigurable alloy interface maintains zero nucleation overpotential and enables dendrite-inhibited Zn electrodeposition, achieving exceptional cycling stability (>6000 h) in Zn symmetric cells. The ethanol solvent and Cl − complexed Cu + /Cu 2+ redox couple cooperatively increase the capacity of the activated carbon cathode full cells, delivering >90 mAh g −1 over 10,000 cycles at 0.5 A g −1 , with 95.9% capacity retention. This work establishes a sustainable interfacial engineering paradigm through electrolyte-mediated in situ alloying, effectively addressing the critical challenge of zincophilic interface defunctionalization in Zn-metal battery systems.
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JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Zhiguo Dong,Qian Chen,Xixi Ma,Yun Chen,Zixuan Wu,Weiwei Li,Jinfeng He,Chuanrun Li,Liang Ge,Haiyang Yan
In addition to the characteristics of monovalent anion perm-selective membrane (MAPM), the separation efficiency between monovalent and divalent anions (e.g., Cl − /SO 4 2− ) can be potentially influenced by the co-ion transport especially through cation exchange membranes (CEMs) in selectrodialysis. However, in such a process, the separation mechanism remains unclear and needs to be addressed. Hence, in this study, the role of co-ion transport in selectrodialysis for mono/divalent anion separation was systematically investigated in a new perspective. Results indicated that the CEM (e.g., SYMC membrane) that has a loose structure, a low ion exchange capacity, and a high transport number for SO 4 2− (0.133) exhibited a high co-ion flux of SO 4 2− and thus a high selectivity of Cl − /SO 4 2− (17.6) in selectrodialysis. Apart from the CEM properties, the paired cation (e.g., K + and Na + ) that has a high diffusion coefficient exhibited a high co-ion transport of SO 4 2− and thus a high selectivity (17.6−18.0). In addition, a high current efficiency (77.3 %), and a low operating expense (0.03 $ kg −1 ), capital expenditure (0.35 $ kg −1 ), and total cost (0.38 $ kg −1 ) can be obtained. These findings suggest that co-ion transport of SO 4 2− through CEM is beneficial for the selective separation of mono/divalent anions in selectrodialysis, offering practical guidance for industrial application of MAPMs to achieve a high selectivity.
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JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Xuanting He,Jihan Lu,Jiaxiang Liu,Zixuan Wu,Boyu Li,Zhong Chen,Wenquan Tao,Zhuo Li
Effectively addressing crude oil spills remains a global challenge due to its high viscosity and limited flow characteristics. In this study, we successfully prepared a modified sponge (PCP@MS) by embedding the photothermal material of Co-HHTP and coating the melamine sponge (MS) with low-surface-energy polydimethylsiloxane (PDMS). The PCP@MS exhibited outstanding hydrophobicity with WCA of 160.2° and high oil absorption capacity of 59–107 g/g. The PCP@MS showed high separation efficiency of 99.2% for various oil-water mixtures, along with notable self-cleaning properties and mechanical stability. The internal micro-nano hierarchical structure on the sponge surface significantly enhanced light absorption, synergizing with the photo-thermal conversion properties of Co-HHTP, enabled PCP@MS to achieve a surface temperature of 109.2 °C under 1.0 solar light within 300 s. With the aid of solar radiation, PCP@MS is able to heat up quickly and successfully lowering the viscosity of the surrounding crude oil, resulting in an oil recovery rate of 8.76 g/min. Density functional theory (DFT) calculation results revealed that Co-HHTP featured a zero-gap band structure, rendering advantageous electronic properties for full-wavelength light absorption. This in situ solar-heated absorbent design is poised to advance the practical application of viscous oil spill cleanup and recovery.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Dan Sun,Qilong Chen,Yi He,Yang Bai,Changhua Li,Rui Gou,Chuanfang Zhang,Xinbo Xu,Haichao Zhang
The main aim of this study was to exploit the advantages of dopamine and tetraaniline (TA) to enhance the physical barrier properties and active anti-corrosion performance of composite coatings ; in this study, the growth of polydopamine on the surface of Co-MOF enhanced its compatibility with waterborne epoxy, and Co-MOF-PDA-TA (MP-TA) was successfully synthesised by adding dopamine and tetraaniline via Michael addition , confirmed through characterisation methods such as Fourier-transform infrared spectroscopy, X-ray diffraction and scanning electron microscopy. MP-TA can be added as a nanofiller additive to water-based epoxy coatings, and a detailed study on the corrosion resistance of the prepared composite coatings showed that the composite coating containing 0.50wt% MP-TA/WEC exhibits good anti-corrosion performance with an impedance modulus at low frequency (0.01 Hz) of 7.253 × 10 9 Ω cm 2 because TA not only prolongs the time required for corrosion ions to reach the interface but also forms a passivation film on the steel surface. Moreover, the reduced TA can be oxidised to EB or even LEB by releasing two electrons, which further promotes the formation of a passivation film, providing a good pathway for the application of MP-TA as a multifunctional additive.
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MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
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2024
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IF 6.1
Qiang Liu,Jiarui Yang,Guoqing Tian,Zhenhui Huang,Liying Shen,Chuyan Hu,Baihan Wang,Kaiyang Wang,Shuang Feng,Feng Ye
Materials with high specific strength and toughness are urgently needed in the fields of electronic packaging, armor, and aerospace. SiC/Al composites show good potential for these applications but the problem of mutual exclusion of strength and toughness still needs to be solved. Herein, we propose a new strategy to simultaneously enhance its strength and toughness from the perspective of structural optimization and interface enhancement. Inspired by the nacre structure, a 3D-(SiC–Si 3 N 4 )/Al co-continuous composite was prepared by freeze-casting combined with the pressure infiltration method. During the process, elongated Si 3 N 4 grains were introduced into the ceramic framework to design the internal lamella wall structure and increase the contact area with the aluminum substrate. Moreover, a favorable interfacial bonding was designed between Si 3 N 4 and Al to improve interface wettability . The reliable microstructure of porous 3D-(SiC–Si 3 N 4 ) preform was tailored through the adjustment of initial solid loading and the α-Si 3 N 4 component. The effects of initial solid loading and the α-Si 3 N 4 component on the microstructure, interfacial wettability, and mechanical properties of the final composites were investigated. The results showed that the SiC–Si 3 N 4 /Al composites possess high flexural strength (769 MPa) and fracture toughness (15.1 MPa m 1/2 ), which is superior to data reported in general literature. Numerous elongated β-Si 3 N 4 grains are produced on the ceramic skeleton, forming an interlocking structure with the aluminum matrix, which increases the contact area with the aluminum substrate. A chemical reaction layer was formed at the interface of the composite, greatly improving the interfacial bonding strength. This work provides a promising design guideline for developing and optimizing high-strength and tough composite.
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IONICS
·
2024
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IF 2.4
Yan Qiang,Zhu Wenxu,Ma Xiaoxue,Liu Na,Liu Yucheng,Xia Meichen
A series of ether-functionalized paramagnetic ionic liquids, 1-(2-methoxyethyl)-3-alkylimidazolium tetra thiocyanate cobalt [C n 2O1IM] 2 [Co(NCS) 4 ] ( n = 1, 2, 3), was synthesized and characterized. The density, surface tension, refractive index, and electrical conductivity of these ionic liquids were measured at 293.15 to 343.15 K at intervals of 5 K, and their thermal expansion coefficients α were calculated. The molecular volume was obtained by measuring the pore volume and porosity. Based on Glasser theory, the standard entropy S 0 (298 K), lattice energy U POT , surface entropy S a , and surface enthalpy, H of the ionic liquids were calculated, and the reason why the ionic liquid is in a molten state at room temperature was explained from the perspective of lattice energy. The molar surface Gibbs energy was introduced to improve the traditional Eötvös equation, which was combined with the refractive index to estimate the surface tension, obtaining a fitting index exceeding 0.99. Finally, the relationship between the electrical conductivity of the ionic liquids and temperature was investigated, and the activation energy, molar electrical conductivity, and electrical conductivity diffusion coefficient of the ionic liquids were obtained. The relationship between their properties was summarized. Compared with previously reported ionic liquids using 1-(2-methoxyethyl)-3-methylimidazolium as a cation, this type of ionic liquid has higher density and a smaller coefficient of thermal expansion.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Dexin Chen,Yunxuan Ding,Xing Cao,Licheng Sun
Electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) offers a sustainable pathway for biomass valorization and green H 2 generation, yet its multi-electron transfer process demands efficient catalysts to overcome kinetic bottlenecks. Herein, we demonstrate that the spatial configuration of Co species in Ni hydroxides (Ni(OH) 2 ) dictates alcohol oxidation activity by modulating interfacial electron transfer dynamics. Engineered heterostructured Co 3 O 4 -Ni(OH) 2 outperforms planar NiCo layered double hydroxide (LDH), achieving 106 % higher current density with nearly 100 % yields and Faradaic efficiencies of the target product. Experimental and theoretical results reveal that the heterointerface optimizes alcohol adsorption and accelerates electron transfer kinetics via interfacial charge distribution. Engineering of interfacial electronic properties enables the catalyst to be versatile for the electrooxidation of variant substituted alcohol substrates. Those insightful results establish a paradigm for catalyst design methodology in biomass upgrading through regulating charge transfer pathways.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Jiaqi Wang,Shuangjun Li,Jingjing Zhao,Kaihong Liu,Bo Jiang,Hexing Li
Photothermal catalysis of CO 2 hydrogenation holds great potential in achieving carbon neutrality . However, the rational design of cost-effective photothermal catalysts with high performance for CO 2 hydrogenation is an ongoing challenge. Herein, we employed CuCo y BOₓ composite catalysts by incorporating both CuBOₓ and amorphous CoBOₓ to efficiently catalyze the CO 2 hydrogenation. Besides the high selectivity (98.0%), the optimized CuCo 5 BO x demonstrated a remarkable CO yield of 124.7 mmol g⁻¹ h⁻¹ under illumination at 300°C, which was 3 times higher than the traditional thermocatalysis. Experimental results and theoretical calculations demonstrated CuBOₓ acted as a photocatalyst , donating electrons to CoBOₓ active sites. Coupling boron-oxygen species with CuCo bimetallic-oxides synergically enhanced the CO 2 adsorption capacity and accelerated charge transfer, thereby enhancing the photothermal synergistic effect and consequently boosting the catalytic activity. This study establishes an approach for the rational design of non-precious metal-boride catalysts, enabling efficient photothermal conversion of CO 2 into CO under mild conditions.
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