JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Chia-Tse Lee,Haoyuan Zheng,Chen Jin,Hang Che,Li Wang,Yuyuan Zhao,Shixuan He,Xinhua Wang,Yifeng Yu,Mi Yan
Metal nitrogen hydride (Li-Mg-N-H) is regarded as an ideal hydrogen storage material for automotive applications due to its advantages of high hydrogen storage capacity (5.6 wt%), low operating temperature, and good cycling performance, but the comprehensive hydrogen storage performance of this material still could be improved. For this reason, this paper constructed a Li-Na-Mg-N-H composite system by synthesizing NaMgH 3 to replace MgH 2 in the Li-Mg-N-H system. The improvement of the hydrogen absorption and desorption properties of the composite system after the replacement of MgH 2 by NaMgH 3 was investigated. Various properties and test results showed that the composite system after the replacement of MgH 2 by NaMgH 3 showed better hydrogen absorption and desorption properties. The initial/peak hydrogen release temperatures of Li-Na-Mg-N-H decreased from 135 ˚C/245 ˚C to 105 ˚C/145 ˚C, and the apparent activation energy of hydrogen release was reduced from 114.90 to 104.05 kJ/mol which means the kinetics of hydrogen absorption and desorption was greatly improved. The mechanism study shows that NaMgH 3 will react with LiNH 2 and forms the intermediate product Li 3 Na(NH 2 ) 4 during the hydrogen release process, which changes the hydrogen desorption pathway of the composite system and thus the hydrogen absorption and desorption kinetics were improved.
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Nature Communications
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2026
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IF 18.1
Wei Jiayang,He Weiyuqing,Liu Qiance,Lu Xin,Wang Peng,Song Weili,Takeda Osamu,Liu Gang,Matsubae Kazuyo,Yang Yongxiang,Zhu Hongmin,Jiao Shuqiang
Recycling end-of-life (EoL) NdFeB magnets is critical for securing supply of rare-earth element neodymium in the low-carbon transition. We develop a molten salt electrolysis recycling approach using EoL NdFeB magnet anodes and a consumable solid magnesium cathode, operating at 548–650 °C and 0.75–3 A·cm −2 cathodic current density. Selective neodymium dissolution and in situ formation of a liquid Mg– (12.0–15.1 mol%) Nd alloy with average current efficiency of 98.4% are achieved. With high recycling efficiency and continuous operation, this approach overcomes neodymium collection and scalability barriers of conventional chloride electrolysis. Life-cycle assessment shows that the proposed process lowers climate change impacts to 17.36–18.18 kg CO 2 eq. kg⁻¹ Nd, approximately 15% of that of primary production. Techno-economic analysis shows that neodymium metal production costs fall to 90.0 USD kg⁻¹ Nd at the 3000 A scale scenario, which is approximately one-third lower than the sales price of Nd metal. Such approach demonstrates significant potential for industrial-scale application and facilitates the integration of neodymium recycling into circular economy strategies.
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MICROCHIMICA ACTA
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2010
·Vol. 171
·期 3
·385-392
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IF 2.648
Yin Huanshun,Zhou Yunlei,Liu Tao,Cui Lin,Ai Shiyun,Qiu Yanyan,Zhu Lusheng
An amperometric biosensor for nitrite was prepared by immobilizing cytochrome c (Cyt c) on a gold electrode that was modified with Nafion and a Cu-Mg-Al layered double hydroxide (Cu-LDH). The Cu-LDH was characterized by Fourier transform infrared spectroscopy and powder X-ray diffraction. The UV-visible spectrum suggests that Cyt c retains its native conformation in the modified film. The direct electrochemical investigation indicated that the composite film represents a good platform for the immobilization of Cyt c as well as an excellent promoter for the electron transfer between Cyt c and the gold electrode. Moreover, the biosensor showed a remarkable bioelectrocatalytic activity for the oxidation of nitrite with a linear range from 0.75 to 123 μM. The detection limit is 2 × 10 −7 M (S/ N = 3). The biosensor was successfully applied to the determination of nitrite in food samples.
研究领域:
生物分析化学
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电化学传感
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食品分析
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生物传感器
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分子诊断
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BIOMASS & BIOENERGY
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2026
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IF 7
Yingying Zhu,Zhong Wang,Jinze Li,Yumeng Ren,Chao Zeng,Geng Chen
Mg-Zn-Fe LDH was anchored on phosphate-modified reed straw biochar. • Mg 1 Zn 1 Fe-LDH@PBC reached a surface area of 394.466 m 2 g −1 . • The adsorbent efficiently removed RhB, MO, and OTC from water. • Maximum RhB adsorption capacity reached 659.2 mg g −1 . • Removal efficiency remained around 70% after five cycles. Sustainable conversion of waste biomass into high-performance adsorbents provides an effective route for organic wastewater remediation. In this study, phosphate-modified reed straw biochar-supported layered double hydroxide composites (LDH@PBC) were synthesized via a facile co-precipitation method. Binary and ternary LDHs containing Mg 2+ , Zn 2+ , and Fe 3+ were constructed on the biochar matrix, and their adsorption performance toward rhodamine B (RhB), methyl orange (MO), and oxytetracycline (OTC) was systematically evaluated. The optimized Mg 1 Zn 1 Fe-LDH@PBC exhibited a well-developed porous structure, abundant surface functional groups, and the highest specific surface area of 394.466 m 2 g −1 . Owing to the synergistic effects of phosphate-modified biochar and Mg-Zn-Fe LDH nanosheets, the composite maintained stable adsorption efficiency over a broad pH range. The optimized Mg 1 Zn 1 Fe-LDH@PBC achieved a maximum experimental RhB adsorption capacity of 659.2 mg g −1 under the optimized dosage condition. In contrast, Langmuir isotherm fitting gave theoretical maximum monolayer adsorption capacities of 944.898, 696.552, and 303.146 mg g −1 for RhB, MO, and OTC at 298 K, respectively. Kinetic and isotherm analyses suggested that the adsorption process may be associated with multiple interactions, including electrostatic attraction, ion exchange, hydrogen bonding, π–π interactions, and possible surface complexation. In addition, the removal efficiency remained around 70% after four adsorption–desorption cycles, indicating favorable reusability. This work highlights a promising biomass-derived LDH/biochar adsorbent for efficient and sustainable removal of multiple organic pollutants from water.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Shinjae Lee,Hayoung Jeong,Hyungjin Choi,Chaewon Lee,Donghyeon Kim,Eonu Nam,Na Hye Kim,Hyeongeon Lee,Jeong Woo Han,Kwangjin An
Ru 1 /Mg(OH) 2 enables hydrogen-free catalytic fractionation of lignocellulose in water. • Single-atom Ru anchored on defect-rich Mg(OH) 2 forms active Ru–O–Mg sites. • C α –OH of β–O–4 linkages acts as an intrinsic hydrogen source for cleavage. • DFT reveals a low-barrier dehydrogenation-assisted β–O–4 scission pathway. • Up to 50.7 wt% aromatic monomers are produced without external hydrogen. Lignin-first biorefining offers a promising route for producing renewable aromatic chemicals; however, most reductive catalytic fractionation (RCF) strategies rely on external hydrogen, limiting their scalability and safety. Here, we report a Ru 1 /Mg(OH) 2 catalyst that enables self‑hydrogen supplied catalytic fractionation (SCF) of lignocellulose in water without external H 2 . The catalyst delivers a remarkably high lignin monomer yield of 50.7 wt% from birch sawdust, approaching the theoretical maximum. Comprehensive characterization (XRD, TEM, XAFS, XPS, Raman, and ESR) reveals that Ru is predominantly atomically dispersed on Mg(OH) 2 and interacts strongly with proton-missing oxygen defects to form unique Ru–O–Mg interfacial sites. These sites generate highly basic oxygen species that promote C α –OH dehydrogenation and subsequently facilitate β–O–4 bond cleavage. Model compound studies confirm that the C α –OH group serves as the intrinsic hydrogen donor, while isotope-labeling experiments and kinetic analysis identify C α –H activation as the rate-determining step. Density functional theory calculations further establish that the dehydrogenation-assisted β–O–4 cleavage pathway has the lowest activation barrier (0.31 eV), validating the endogenous hydrogen mechanism. Collectively, this study provides fundamental insights into hydrogen-free lignin depolymerization and establishes Ru 1 /Mg(OH) 2 as a highly efficient platform for green and scalable lignocellulose valorization. Lignin-first biorefining offers a promising route for producing renewable aromatic chemicals; however, most reductive catalytic fractionation (RCF) strategies rely on external hydrogen, limiting their scalability and safety. Here, we report a Ru 1 /Mg(OH) 2 catalyst that enables self-hydrogen supplied catalytic fractionation (SCF) of lignocellulose in water without external H 2 . The catalyst delivers a remarkably high lignin monomer yield of 50.7 wt% from birch sawdust, approaching the theoretical maximum. Comprehensive characterization (XRD, TEM, XAFS, XPS, Raman, and ESR) reveals that Ru is predominantly atomically dispersed on Mg(OH) 2 and interacts strongly with proton-missing oxygen defects to form unique Ru–O–Mg interfacial sites. These sites generate highly basic oxygen species that promote C α –OH dehydrogenation and subsequently facilitate β–O–4 bond cleavage. Model compound studies confirm that the C α –OH group serves as the intrinsic hydrogen donor, while isotope-labeling experiments and kinetic analysis identify C α –H activation as the rate-determining step. Density functional theory calculations further establish that the dehydrogenation-assisted β–O–4 cleavage pathway has the lowest activation barrier (0.31 eV), validating the endogenous hydrogen mechanism. Collectively, this study provides fundamental insights into hydrogen-free lignin depolymerization and establishes Ru 1 /Mg(OH) 2 as a highly efficient platform for green and scalable lignocellulose valorization. Download: Download high-res image (237KB) Download: Download full-size image
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Results in Surfaces and Interfaces
·
2026
·
IF 6.2
Jinbei He,Hualiang Huang,Xiaotao Zheng
To address the severe corrosion of Mg alloys caused by oxalic acid generated by high-temperature oxidation in automotive engine coolant, this study employed electrochemical testing, surface characterizations, and theoretical calculations to investigate the corrosion inhibition performance, long-term protective mechanism, and adsorption behavior of sodium laurate (SL) on AZ91D Mg alloy in oxalic acid solution. The results indicated that the corrosion inhibition efficiency of 1 g/L SL reached 98.28% in oxalic acid solution, and excellent inhibition performance could still be maintained after 96 h immersion. The adsorption of SL followed the Langmuir adsorption isotherm model, and it could form a dense and stable hydrophobic protective film on the alloy surface. Theoretical calculations showed that SL molecules adsorbed on the alloy surface through a tilted configuration with carboxyl groups as active sites, forming a stable hydrophobic layer through synergistic physicochemical adsorption and effectively inhibiting the alloy corrosion.
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DESALINATION
·
2026
·
IF 9.9
Yaoxian Hu,Binbin Zhou,Xinyu Xiao,Hui Su,Wensen Liu,Zhaowu Zhu,Tao Qi
Dual roles of electronic effect and steric hindrance in NOPs are decoupled. • A structure-performance paradox in linear and branched NOPs is revealed. • The intrinsic Li + /Mg 2+ micro-solvation divergence (CIP vs. SSIP) is uncovered. • A dual-parameter model is established to predict extraction capacity and selectivity. This study proposes a synergistic electronic effect and steric hindrance regulation mechanism in neutral organophosphate-extraction systems targeting efficient Li and Mg extraction from salt lake brines. Using tributyl phosphate (TBP), tripentyl phosphate (TAP), and triisoamyl phosphate (TIAP) as model extractants, we decoupled the dual roles of linear-chain elongation and branching in alkyl chain structures. The former enhances the P O electron density and intrinsic Li + affinity via the positive inductive effect, whereas branched structures govern the selectivity via steric hindrance. Combined molecular dynamics (MD) simulations and density functional theory (DFT) calculations revealed that Li + forms a compact four-coordinate contact-ion pair (CIP, [Li·2L·H 2 O·TFSI]), whereas Mg 2+ exists as a bulky six-coordinate solvent-separated ion pair (SSIP, [Mg·4L·2H 2 O] 2+ ). This difference considerably amplifies steric sieving. Specifically, the bulky branched chains of TIAP impose a severe conformational energy penalty (97.5 kJ/mol) on the crowded Mg 2+ shell, strongly suppressing Mg 2+ coordination. Consequently, the extraction efficiency of TIAP is comparatively low in pure Li + systems (60.5%) but surges to 83% in high-Mg backgrounds under the synergistic action of steric Mg 2+ rejection and the Hofmeister effect, achieving a superior separation factor of 215.0. Finally, a quantitative dual-parameter model that accurately explains the extraction capacity (TAP > TBP > TIAP) and selectivity (TIAP > TAP > TBP) trends was established. This study provides deep molecular insights into Li + /Mg 2+ separation along with a robust theoretical framework for rational design of selective ligands for complex brines. Download: Download high-res image (94KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Ziming Xin,Chendao Ruan,Jing Wang,Yuejin Zhang,Jiyan Shi
Fe/Mg co-modified biochar enabled simultaneous PFAS adsorption and Cr(VI) reduction–immobilization. • Acid-washed Fe₄Mg₁-NBC showed enhanced removal, pore accessibility, and regenerability. • Experiments and DFT confirmed hierarchical pores, bimetallic sites, and interfacial synergy as key mechanisms. Simultaneous removal of per - and polyfluoroalkyl substances (PFAS) and hexavalent chromium (Cr(VI)) from water remains challenging because of their divergent adsorption, redox, and interfacial behaviors. Herein, Fe/Mg co-modified N-doped biochar (Fe₄Mg₁-NBC) was fabricated through a hydrothermal synthesis strategy followed by pyrolysis and acid washing for the synergistic remediation of PFAS/Cr(VI) co-contaminated water. The optimized Fe/Mg ratio regulated the pore architecture and surface chemistry, producing a hierarchically porous, partially graphitized carbon matrix enriched with oxygen-containing groups and highly dispersed Fe–O/Mg–O active sites. Fe₄Mg₁-NBC exhibited superior removal performance toward PFOA, PFOS, PFBA, PFBS, and Cr(VI) in both single-solute and binary systems, with favorable adsorption under weakly acidic conditions and moderate temperatures. Acid washing further improved performance by eliminating inactive residues, opening blocked pores, and exposing additional active sites, while more than 90% of the initial adsorption efficiency was retained after five regeneration cycles. XPS analysis revealed Fe 2+ /Fe 3+ transformation and Metal–F interactions, indicating that Cr(VI) removal proceeded through Fe-mediated reduction followed by Cr(III) immobilization, whereas PFAS uptake involved electrostatic attraction, coordination, hydrophobic interaction, and pore filling. DFT calculations further demonstrated that Fe/Mg co-doping markedly enhanced PFAS adsorption affinity, decreasing the adsorption energy from +0.43 eV on pristine biochar to −1.24 eV on Fe/Mg-NBC. Co-adsorption configurations also suggested that Fe and Mg sites provided complementary functions for Cr(VI) activation and PFAS stabilization in mixed systems. These findings establish Fe₄Mg₁-NBC as a reusable multifunctional adsorbent for efficient treatment of PFAS/Cr(VI)-contaminated water. Download: Download high-res image (167KB) Download: Download full-size image
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Journal of Water Process Engineering
·
2026
·
IF 6.6
Lingyi Chen,Chuzhan Jin,Huimin Zhang,Chunying Dong,Zhuohui Qian,Micong Jin,Meiqiang Cai
Sludge dewatering supernatant is phosphorus-rich yet underutilized because its high ionic strength and dissolved organic matter limit conventional adsorbents. Here, an Fe/Mg bimetallic sludge biochar (FeMg@SBC) was synthesized via one-step impregnation-pyrolysis for phosphate capture. FeMg@SBC exhibited a maximum adsorption capacity of 116.8 mg/g and maintained efficient phosphate removal over pH 3–11, consistent with the synergistic roles of Fe and Mg sites. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) revealed Fe-O-P and Mg-O-P linkages formed through ligand exchange with surface hydroxyl/oxide groups, while X-ray diffraction (XRD) confirmed adsorption-induced surface precipitation via metal-phosphate formation. Together with density functional theory (DFT) calculations identifying Fe/Mg-associated oxygen-containing groups as key active sites, these results indicate that phosphate immobilization was governed by coupled ligand exchange and surface precipitation. In real sludge dewatering supernatant, 1.0 g/L FeMg@SBC reduced phosphate from 131.9 to 40.2 mg/L, retained 65% of its initial capacity after five regeneration cycles, and showed low Fe and Mg leaching of 0.25 and 0.13 mg/L, respectively. The estimated production cost was 1.60 USD/kg. A conceptual process integration was further proposed, providing a cost-effective pathway for sludge valorization and closed-loop phosphorus recovery from sidestreams.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Huanhuan Gao,Jianzhong Liu,Tingting Suo,Haiou Wang,Jianren Fan
Directionally modulated Al-Mg-B/Al-Ti-V alloys enable dual-mode synergy. • Lower ignition thresholds, boost heat release, and enhance motor safety. • Agglomerate size reduced by 45.8% (AMB) and 54.8% (ATV), boosting energy release efficiency. • “On-demand” alloy design delivers predictable optimization for tailored fuels. Low energy release efficiency due to aluminum agglomeration remains a critical bottleneck limiting the performance of composite propellants. This study employs two directionally modulated ternary alloys, Al-Mg-B and Al-Ti-V, to optimize the full-cycle performance of HTPB composite propellants via multi-element synergy. Optimal alloy ratios are identified via combustion experiments. The selected alloys are subjected to thermal oxidation analysis, and the corresponding composite propellants are prepared. Systematic tests evaluate ignition, combustion, agglomeration, and products under high pressure. Results indicate that ternary alloy modification promotes efficient ignition, significantly increases combustion heat release, and markedly reduces pressure sensitivity. Specifically, the modification suppresses agglomeration (mean particle size reductions of 45.8% and 54.8%, respectively), thereby improving energy-release efficiency. Further investigation clarifies the mechanisms governing the behavior of Al-Mg-B and Al-Ti-V in composite propellants. These findings suggest that directionally modulated ternary alloys offer a viable strategy for simultaneously enhancing energy release and potentially improving motor operational safety.
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Journal of Energy Storage
·
2026
·
IF 10.7
Xu Zhang,Qifan Gu,Jiabao Bai,Guoting Long,Yana Liu,Yunfeng Zhu,Jiguang Zhang,Jun Wang,Rui Shi,Xiaohui Hu
VS 2 has attracted extensive attention as potential host material for Mg 2+ /Li + hybrid-ion batteries (MLHBs) because of its considerable capacity and large interlayer spacing. However, the relatively weak adsorption ability and huge volume variations lead to slow reaction kinetics and poor cycle lifespan, which greatly restricts their further application in MLHBs. Herein, we have proposed a synergistic engineering of morphology regulation and sulfur vacancy for the construction of hierarchical VS 2 microflower via two pivotal procedures, which is demonstrated as a high-energy density cathode for MLHBs. Specifically, such special microflower morphology with sufficient interspace and abundant sulfur vacancies can release the inner stress to maintain structural integrity, thus leading to enhanced cycling stability. Meanwhile, the synergistic effect of flower-like structure and abundant sulfur vacancies contributes to providing sufficient redox-active sites, facilitating charge transfer, improving Li + adsorption capacity, and accelerating ion diffusion, as verified by kinetic analysis and theoretical calculations. Consequently, the hierarchical VS 2 microflower exhibits a high reversible capacity of 488.8 mAh g −1 at 100 mA g −1 , an excellent energy density of 406.6 Wh kg −1 , and an ultralong cycling stability with a capacity retention of 72.8% at 4000 mA g −1 after 2000 cycles. Besides, surface-controlled capacitive contribution analysis coupled with in-situ electrochemical impedance spectra (EIS) measurements confirm the excellent reaction kinetics. Therefore, this work presents a synergistic engineering strategy that combines morphology regulation and vacancy introduction in the fabrication of VS 2 -based cathodes for advanced MLHBs.
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RENEWABLE ENERGY
·
2026
·
IF 9.1
Hanyuan Lv,Ruojiang Liu,Yi Fan,Ruolin Zhao,Jun Li,Feifan Hong,Haizhen Liu,Jin Guo,Zhiqiang Lan
Due to their large specific surface area and high porosity, porous carbon materials have emerged as a prominent research focus in the field of hydrogen storage. In this study, nanoporous carbon-coated V 2 O 3 nanorods (p-V 2 O 3 /C) were synthesized through high-temperature calcination under a gas mixture using a vanadium metal-organic framework (V-MOF) as a precursor, aimed at enhancing the hydrogen storage performance of MgH 2 . The incorporation of p-V 2 O 3 /C significantly reduced both the initial dehydrogenation temperature and the activation energy for dehydrogenation of MgH 2 to 192 °C and 88.6 kJ∙mol −1 , respectively. Notably, catalytic MgH 2 can desorb 5.35 wt% hydrogen even at a low temperature of 225 °C over a duration of 75 min, with an impressive capacity retention rate of 98.5% after 30 cycles of hydrogen absorption/release. The proposed catalytic mechanism indicates that the presence of metals such as V, VO, V 2 O 3 , and MgO in the composite system formed by p-V 2 O 3 /C with ball-milled MgH 2 serves to reduce the Mg-H bond strength, thereby facilitating easier dehydrogenation of MgH 2 . Additionally, incorporating MgO can stabilize the crystal interface of MgH 2 while impeding particle growth and enhancing its dehydrogenation process. In this work, the multiphase composite system based on p-V 2 O 3 /C has improved the kinetic performance for hydrogen storage in MgH 2 .
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危险品化学品经营许可证（带存储）