APPLIED RADIATION AND ISOTOPES
·
2025
·
IF 1.8
Tao Gao,Xiang Gong,Jiali Liu,Sheng Hu,Wei Yu,Yuhong Liu,Jiwei Liang
A method for regulating the rutile and anatase ratio of TiO 2 products by adding tartaric acid is reported. By this method, TiO 2 with a specific anatase/rutile ratio exhibited excellent selective adsorption performance of 68 Ge and 68 Ga. Experiment shows that Tartaric acid assist synthesized TiO 2 enabled strong 68 Ge adsorption but negligible adsorption of 68 Ga. Meanwhile, the TiO 2 adsorption exhibited significant acid resistance, with minimal Ti 4+ leaching. In addition, the 68 Ga elution efficiency and 68 Ge breakthrough of radioactivity experiments demonstrated that synthesized TiO 2 achieved an initial 68 Ga elution efficiency of 75%, which remained about 65% after 200 elution cycles. Furthermore, over the four-month observation period, the 68 Ge breakthrough of the TiO 2 adsorbent did not exhibit a significant increase, remaining below 1×10 -5 . Generally, the synthesized TiO 2 adsorbent exhibits potential as a 68 Ge/ 68 Ga generator column adsorbent with outstanding acid-resistant, radiation-resistant, efficient 68 Ga elution and low 68 Ge breakthrough for long-term.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
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.
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Zeng Youze,Wang Xue,Qi Wei,Liu Changpeng,Lu Lanlu,Xiao Meiling,Li Kai,Xiao Fei,Shao Minhua,Xing Wei,Zhu Jianbing
The inherent scaling relationships between adsorption energies of oxygen-containing intermediates impose an intrinsic limitation on the maximum oxygen reduction reaction (ORR) activity, which represents one of the bottlenecks for the practical application of anion exchange membrane fuel cells (AEMFCs). To address this challenge, we align the 3 dz 2 orbital energy levels of Fe and Co to selectively customize the dissociative ORR pathway without the formation of OOH* intermediates, circumventing the conventional OH*-OOH* scaling relations. This rational design is achieved by atomic phosphorus(P) substitution, which not only optimizes orbital matching towards O-O cis-bridge adsorption, but also stabilizes the spontaneously adsorbed OH ligand as an electronic modifier. Due to these attributes, the well-designed FeCo-N/P-C catalyst demonstrates ORR performance with a current density of 251 mA·cm -2 at 0.9 V iR-free under 1.5 bar H 2 -O 2 , showing a competitive performance with state-of-the-art Pt-free electrocatalysts and meeting the 2025 DOE target (44 mA·cm -2 ). More importantly, the peak power density reaches as high as 0.805 W·cm -2 under 1.5 bar H 2 -air with negligible degradation observed over 10,000 cycles of voltage accelerated stress testing. This work offers a highly competitive electrocatalyst for AEMFCs and opens an effective avenue to bypass the constraints of linear scaling relations for ORR and beyond.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Honghui Yan,Xiangyu Wang,Yi Zhu,Yuding Zhu,Ruiqi Xin,Shunze Zhang,Meiling Chen,Song Li,Jeonghun Kim,Wenkai Zhu
Free formaldehyde poses significant health risks as a prevalent indoor organic pollutant, driving demand for efficient and renewable adsorption solutions. While Fe-CoPBA bimetallic metal-organic frameworks show potential for formaldehyde removal, their powdered crystalline form presents practical limitations including poor recyclability and secondary contamination. Herein, we developed a novel Fe-CoPBA@bamboo composite (Fe-Co@B) through solution blending, leveraging bamboo's inherent micro-nano hierarchical pores for Fe-CoPBA encapsulation. The Fe-CoPBA nanoparticles (NPs) successfully integrated into delignified bamboo conduits through hydroxyl-mediated ligand bonding and van der Waals interactions. Formaldehyde removal tests demonstrated Fe-Co@B's dual adsorption-catalysis mechanism effectively eliminates indoor free formaldehyde. The Fe-Co@B maintained stable removal efficiency for formaldehyde through 10 regeneration cycles while preserving structural integrity. Furthermore, the Fe-Co@B exhibits high reusability along with moisture and deformation resistance. Therefore, this work contributes to solving the current problem of indoor free formaldehyde pollution and provides research ideas for the development of new functional bamboo-based products.
✓ 已验证
产品关联
DOI
高影响因子
Petroleum Science
·
2025
·
IF 6.1
Zhi-Cai Zhang,Jia-Kun Wu,Chao Wang,Zhi-Qiang Hou,Yao Tang,Hao Li,Jiao Yang,Jun Gao,Yi-Kan Yang,Yang-Bin Liu,Xiao-Ping Ouyang,Hai-Kuo Wang
With the global oil and gas industry increasingly targeting ultra-deep well development, the demand for wear resistance in polycrystalline diamond compact (PDC) bits is increasing. However, further improvement of the mechanical properties of PDC incurs prohibitively elevated costs and stringent technological challenges. Here, we present a two-stage high-pressure infiltration (HPI) methodology involving cobalt removal pretreatment followed by lubricant infiltration. The successful infiltration of lubricants into diamond micropores has been systematically verified, and the effects of lubricant phase composition, infiltration pressure, and temperature on infiltration depth have been thoroughly investigated. Fractal dimension analysis characterizes the pore structure of cobalt-removed diamonds, revealing a strong correlation between the fractal dimension and friction coefficient reduction. Tribological testing confirms the formation of lubricating films at friction interfaces, achieving a 71.5% reduction in the coefficient of friction for lubricant-containing diamond materials. This straightforward strategy opens a gate to developing the next generation of self-lubricating diamond materials.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yinsheng Gu,Jia Sun,Tingyan Huang,Fang Wang,Yuchen Sheng,Yingwei Lu,Paifeng Luo
CsPbI 3 is a promising light-absorbing material for photovoltaics due to its excellent thermal stability and optimal bandgap. However, poor film quality and interfacial defects severely restricted the improvement of such devices. In addition, systematic studies on the selection of hole transport layers for inverted CsPbI 3 perovskite solar cells remain limited. In this work, we systematically compared the optoelectronic properties of four HTLs and their effects on the quality of CsPbI 3 films, including NiO X , MeO-2PACz, and their composite films. Specially, the NiO X /MeO-2PACz composite HTLs demonstrated improved substrate coverage and enhanced charge transport characteristics, thereby improving the crystallinity of CsPbI 3 films and the performance of the final device. Furthermore, dimethylammonium chloride (DMACl) compound was employed as a CsPbI 3 surface passivator, with Cl - compensating for I - vacancies to suppress Pb 0 defects and DMA + improving moisture stability. Additionally, the energy level mismatch between the ETL and PVK was significantly reduced after DMACl passivation. Through this dual-side synergistic strategy, the best-performing inverted CsPbI 3 PSCs achieve an impressive power conversion efficiency (PCE) of 15.05 % and a short-circuit current density (J sc ) of 20.9 mA cm −2 . Additionally, the unencapsulated optimized device retains 80 % of its initial PCE after 800 h of storage in dry air.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Ying Wang,Shanze Liu,Fangbiao Wang,Xin Fan,Qi Chen,Youjin Zheng
The high-pressure effect can effectively regulate the bandgap width of thermoelectric materials, thus optimizing the material properties. In this study, the high temperature and high pressure (HPHT) technique was employed to synthesize In-filled, Te/S double-substituted skutterudite-based thermoelectric materials. The effects of synthesis pressures ranging from 2.0 to 3.5 GPa on their phase structure, microstructure, and thermoelectric properties were systematically investigated. XRD and EDS analyses confirm the phase-pure synthesis of In 0.05 Co 4 Sb 11.3 Te 0.6 S 0.1 . The experimental results combined with first-principles calculations indicate that the pressure-induced bandgap widens from 0.245 eV at 2.0 GPa to 0.270 eV at 3.0 GPa, resulting in not only an exponential decay of the conductivity but also a significant increase in the absolute value of the Seebeck coefficient. The analysis based on the Callaway model demonstrates that introducing In, Te, and S elements strengthens grain boundaries, increases point defects, and enhances resonance scattering, thereby effectively reducing lattice thermal conductivity. At 773 K, the 3.0 GPa sample exhibits the lowest thermal conductivity of 1.56 Wm −1 K −1 and a maximum zT value of 1.20, representing a 40.18 % increase over that of the sample synthesized at 2.0 GPa and an 11.02 % increase over that of the Co 4 Sb 11.3 Te 0.6 S 0.1 sample. In addition, the sample synthesized at 3.5 GPa demonstrates excellent mechanical performance, exhibiting a Vickers hardness of 11.12 GPa. New strategies have been provided for the development of materials with both high thermoelectric and mechanical properties.
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Jicheng Wang,Shilei Ding,Bei Ding,Zhipeng Hou,Licong Peng,Yilan Jiang,Fengshan Zheng,Zhaochu Luo,Yu Ye,Jinbo Yang,Yanglong Hou,Rui Wu
Exchange bias (EB) effects play a crucial role in modern magnetic memory technology. Recently, the van der Waals heterostructures have shown potential for investigating mechanisms of the EB effect owing to their tunable physical properties and flexibility in fabrication. However, due to low magnetic ordering temperatures for most van der Waals magnets, establishing EB in van der Waals antiferromagnet/ferromagnet heterostructures at room temperature is challenging. In this study, we fabricate (Fe0.56Co0.44)5GeTe2 (FCGT)/Fe3GaTe2 (FGaT) heterostructures with magnetic ordering temperatures of each component well above room temperature to achieve a room-temperature EB effect. It is found that the sign and magnitude of the EB field can be efficiently controlled by manipulating the Néel order of FCGT. The manipulation of the Néel order shows significant magnetic field dependence. A strong preset field induces a switch in the Néel order of FCGT, which aligns the interfacial magnetization at the FCGT/FGaT interface, leading to robust EB, as revealed by both transport measurements and macrospin model calculations. Our findings demonstrate the intrinsic manipulation and switchability of room-temperature EB in all-van der Waals heterostructures and further emphasize the potential of two-dimensional spintronic devices.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Lu Wen,Chaojie Li,Houqun Xiao,Huazhou Hu,Ruizhu Tang,Chengsi Hu,Chuanming Ma,Chaobin Lai,Luocai Yi,Qingjun Chen
The ZrCo alloy, considered an ideal candidate material for hydrogen (or its isotope) storage to replace uranium in the ITER, faces challenges due to its susceptibility to hydrogen-induced disproportionation, which leads to a diminished cycling life. To address this, we investigated the substitution of V and Cr for Zr and Co. Our study reveals that this substitution not only refines the grain size and expands the lattice constant but also significantly enhances the kinetics of hydrogen absorption. Notably, the Zr 0.95 V 0.05 Co 0.85 Cr 0.15 alloy demonstrates a remarkable 98.8 % reduction in the time required to absorb 90 % of its full capacity compared to ZrCo. This alloy also exhibits superior isotope effects under H 2 and D 2 environments, along with lower enthalpy and entropy for dehydrogenation, contributing to a reduced dehydrogenation temperature and enhanced resistance to disproportionation. After 50 cycles of hydrogen absorption and desorption, the hydrogen storage capacity of Zr 0.95 V 0.05 Co 0.85 Cr 0.15 alloys decreases by only 5.7 %, significantly outperforming other reference samples and demonstrating its exceptional anti-disproportionation capability. These results indicate that the Zr 0.95 V 0.05 Co 0.85 Cr 0.15 alloy exhibits the best resistance to hydrogen-induced disproportionation. Moreover, post-50 cycling analysis confirms that the phase of the alloy is still dominated by the ZrCo phase, indicating its excellent structural stability. Our findings offer valuable insights into optimizing ZrCo-based alloys for enhanced hydrogen storage performance and cycling stability, providing potential references for advancements in hydrogen isotope storage materials design.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xuechao Liu,Mao Chen,Chunyan Shi,Guoqi Liu,Hongxia Li,Hailong Wang,Bingbing Fan,Yongqiang Chen
In this work, polycrystalline cubic boron nitride (PcBN) carbide insert was prepared by a six-anvil high-pressure apparatus at 1500 °C and 5.5 GPa, integrated sintering with different alloy substrates of the Co content. This work studied the effects of different Co content in alloy substrates on phase composition, microstructure, and mechanical properties of the PcBN carbide insert. The result shows that the binder reacted with cBN particles to produce AlN, AlCo, TiB 2 , W 2 B, and Co 2 B. At the same time, transgranular fracture is wide spread in the sintered body. The flexural strength and hardness of the PcBN carbide insert first increase and then fall. When the alloy substrate is WC-11.5 wt% Co, the PcBN carbide insert shows excellent comprehensive performance, with the flexural strength and hardness reaching 1675.67 MPa and 4100.51 Hv, respectively. Through integrated sintering, Co in the alloy substrate diffused and reacted with the binder in the cBN network at the bonding interface, forming a transition area that significantly improves the bonding strength.
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Jun Cao,Chengsheng Wang,Zechao Xu,Kelan Yan,Liming Shen,Zheng Huang,Lingjie Zhang,Runhua Fan,Ningzhong Bao
Metamaterials exhibiting simultaneous negative permittivity (ε < 0) and negative permeability (μ < 0) offer exceptional electromagnetic properties, enabling advanced applications such as subwavelength imaging, wireless power transfer, and advanced antenna systems. Chromium-based selenium spinel composites have emerged as promising candidates for random double-negative metamaterials (DNMs), although achieving tunable and desired double-negative characteristics remains challenging. Here, CoCr2Se4, distinguished by high magnetic spin resonance in high-frequency fields and low conductivity, was selected to modulate the electromagnetic properties of CuCr2Se4-based composites. A series of (1 − x)CuCr2Se4·xCoCr2Se4 samples were synthesized via a solid-state reaction. Double-negative properties were achieved in the MHz frequency ranges, specifically within 841–1000 MHz for x = 0.2, 638–1000 MHz for x = 0.4, and 484–1000 MHz for x = 0.6. The negative permittivity arises from the plasma oscillations of delocalized carriers, well described by the Drude model. Meanwhile, negative permeability is explained through the suppression of eddy currents–due to the low conductivity of CoCr2Se4-which mitigates skin-depth limitations and enhances magnetic resonance. This composite design not only reduces electromagnetic attenuation but also improves magnetic responsiveness under alternating fields. By clarifying the selection rationale for metallic ferromagnetic spinel composites, this work enhances the theoretical understanding and tuning mechanisms of negative ε and μ. It thereby broadens the scope of metamaterial research and facilitates the development of single-phase double-negative materials, especially for low-frequency near-field applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jinyuan Dong,Silan Chen,Xiaotian Wang,Yuguang Mao,Xiaoxiao Jing,Zhixu Ouyang,Jiabao Ding,Jianjun Tian,Yujin Ji,Youyong Li,Wu-Jun Shi,Yang Han,Weifeng Zhang
Co3Sn2S2 (CSS) possesses robust surface states and high conductivity derived from Co atoms with Weyl points located only 60 meV above the Fermi level (Ef), revealing the probability of tuning the electronic band structure of CSS by doping with transition metal atoms. Here, Fe, Ni, and Cu atoms have been successfully incorporated into CSS, which turns out that the Fe0.1–CSS possesses better activity than CSS and IrO2 with an overpotential of 298 mV to reach the current density of 10 mA cm–2 and a Tafel slope of 358.3 mV dec–1 in 1 M KOH. The Fe0.1–CSS also shows better activity and stability than IrO2 as an anode for the anion exchange membrane water electrolyzer in 1 M KOH. Besides, the density functional theory results indicate that the band structure of CSS is adjusted by the incorporation of transition metal atoms, which is related to the regulation of Ef and thus the variation in electrolytic performance. Our findings provide a strategy to further engineer the activity of a topological semimetal, which provides a direction toward material design for catalysis and beyond.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）