INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Ning Wei,Lipeng Zhang,Kexin Li,Yanyan Xu,Fan Zhao,Yaqiu Sun
Developing cost-effective, efficient, and durable oxygen evolution reaction (OER) electrocatalysts is essential for advancing water splitting to produce clean hydrogen, enabling sustainable energy conversion while reducing reliance on noble metals. Herein, we present a feasible approach for synthesizing a trimetallic selenide catalyst Ni 3 Se 2 @CoSe 2 @FeSe (Ni–CoFe–Se) with ultra-thin nanosheets morphology via the facile selenization of NiCoFe Prussian blue analogues (PBAs) to enhance the OER performance. By leveraging the synergistic interactions within the trimetallic selenide heterostructures and the rationally engineering rich heterointerfaces and defect, the electronic structure of Ni–CoFe–Se was optimized and high-density active sites were generated. The optimal Ni–CoFe–Se catalyst demonstrates excellent OER performance, achieving a low overpotential of 176 mV at 10 mA cm −2 in alkaline conditions, and exhibiting a low Tafel slope of 59 mV·dec −1 . The developed catalyst also possesses excellent stability and long-term durability in electrocatalytic applications. This work offers an effective strategy for designing non-noble metal catalysts through the collaborative integration of chemical composition tuning and structural engineering.
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Journal of Energy Storage
·
2025
·
IF 9.8
Xiao-liang Zhang,Jia-le Wang,Wan-ying Hou,Zhun Gao,Wen-chao Hou,Ya-hui Zhang,Shao-hua Luo,Qing Wang,Xin Liu,Sheng-xue Yan
This study centers on the synthesis and sodium-storage properties of CoSe 2 /FeSe 2 and its carbon-coated composite (CoSe 2 /FeSe 2 @C) derived from CoFe-based Prussian blue analogues (PBAs). The material offers high theoretical capacity for sodium-ion batteries (SIBs), but it suffers from severe structural degradation and poor electrical conductivity during cycling, leading to rapid capacity decay. Carbon coating is introduced to address these challenges by enhancing electronic conductivity, buffering volume changes, and improving ion diffusion kinetics. The CoSe₂/FeSe₂@C composite with a hollow nanostructure was obtained, which was prepared via co-precipitation, selenization, and carbon coating. Electrochemical measurements reveal that the composite boasts excellent electrochemical performance. It delivers a high reversible capacity of 443.5 mAh·g −1 at 0.1 A·g −1 , with 93.4 % capacity retention after 100 cycles, and 310.3 mAh·g −1 at 2 A·g −1 , maintaining 80.1 % retention after 500 cycles. The carbon coating significantly enhances conductivity, structural stability, and ion diffusion, endowing the material with superior cycling and rate capabilities. Through ex-situ XRD scanning and other characterization verifications, this work highlights the great potential of Prussian blue analogue (PBA)-derived materials as high-performance anodes for sodium-ion batteries.
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ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Qixian Zheng,Tingting Zhang,Suiting Ning,Xiangbin Chen,Tian Yu,Zhangheng Lai,Gangjian Tan,Xinfeng Tang,Ning Qi,Zhiquan Chen
As a typical argyrodite compound, Ag8SnSe6 is a very promising candidate for thermoelectric materials due to its inherently ultralow lattice thermal conductivity. However, the main obstacle to further improving its thermoelectric properties is its low intrinsic carrier concentration. Appropriate doping may increase the carrier concentration, but the electronic thermal conductivity will also increase simultaneously, which partially compensates for the optimized power factor. This is particularly prominent for materials with ultralow lattice thermal conductivity. In this study, SnI2 was introduced into Ag8SnSe6, which provides more carriers and thus successfully improves the electrical properties. The maximum power factor at 748 K is enhanced from 4.63 μW cm–1 K–2 to 5.83 μW cm–1 K–2 after adding 3 at. % of SnI2. Meanwhile, the substitution of I for Se weakens the chemical bonding strength, resulting in a lowered sound velocity. In addition, doping of I at the Se site also enhances the bond asymmetry, which causes a stronger lattice anharmonicity. As a result, an extremely low lattice thermal conductivity of 0.058 W m–1 K–1 is achieved at 748 K. Eventually, a high zT value of 1.36 was obtained through the above synergistic optimization, which is a 39% improvement compared to the pristine sample (0.98). Our study demonstrates that chemical bonding engineering is an effective way to further suppress the lattice thermal conductivity of Ag8SnSe6 and also provides guidance for improving the thermoelectric properties of other argyrodite compounds.
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JOURNAL OF ELECTRONIC MATERIALS
·
2025
·Vol. 54
·期 8
·6300-6314
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IF 2.5
Wang Longqin,Li Gang,Jiang Yunshan,Ma Haiguo,Deng Shukang,Deng Shuping
Here, we report that a combination of vacuum melting and spark plasma sintering efficiently enhances the thermoelectric properties of the PbTe-PbSe compounds. Thermal analysis results show that all the PbTe 1− x Se x samples have excellent thermal stability. Positron annihilation spectroscopy results indicate improvement of the crystal quality in all obtained PbTe 1− x Se x samples. X-ray photoelectron spectroscopy studies revealed the presence of Pb 2+ , Pb 4+ , Te 2− , Te 4+ , Se 2− states of Pb, Te, and Se. Meanwhile, replacing the isoelectronic cations with those of different electronegativity will lead to a variation in carrier concentration. All samples exhibit p -type conduction with carrier concentrations varying from 0.07 × 10 19 to 7.34 × 10 19 cm −3 , since carrier mobility changes from 4.7 to 727.7 cm 2 V −1 s −1 at room temperature. Therefore, the maximum figure of merit ( ZT ) value reaches 0.6 at 773 K for the PbSe 0.95 Te 0.05 sample benefiting from the greatly reduced thermal conductivity, which is three times more than the intrinsic PbSe. The peak ZT value of 0.70 at 773 K is obtained in PbTe 0.98 Se 0.02 due to the excellent power factor. Valuable insight can be obtained from a quantitative analysis of the thermoelectric transport in PbTe-PbSe compounds with the anion vacancies (Se 2− and Te 2− ). Graphical
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COMPOSITES PART B-ENGINEERING
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2026
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IF 14
Kaka Li,Dongjie Zhang,Zhongjun Cheng,Zhimin Xie,Sibo Kang,Yuyan Liu
Metal-based absorbing materials (MA) have attracted considerable attention in the field of electromagnetic wave absorption due to their low cost and excellent magnetic loss. However, their relatively high density, single electromagnetic loss mechanism, and poor corrosion resistance of the coating hinder practical applications. Constructing specific structures during the preparation of absorbing materials, and introducing self-healing functionality for enhancing absorbing coating durability represent a highly promising solution. Herein, a high-performance microwave absorbing material with self-healing capability was fabricated. By constructing sandwich/hollow structures during the compounding process of metal-based absorbing material carbonyl iron (CIP) with carbon materials, carbon-coated CIP (CMP@C) was successfully prepared. CMP@C exhibited excellent absorbing performance with a minimum reflection loss (RL min ) as low as −57.07 dB, and its density was reduced by nearly 5 g/cm 3 compared to pure CIP. Benefiting from the dynamic reversible self-healing characteristics of diselenide bonds (-Se-Se-), the damaged CMP@C-Coating after self-healing showed only a 0.08 GHz decrease in maximum effective absorbing bandwidth (EAB max ), demonstrating outstanding self-healing performance and absorbing stability. This study not only proves the effectiveness of constructing hollow and sandwich structures in CMP@C, but also highlights the tremendous potential of dynamic reversible -Se-Se-in self-healing absorbing coatings.
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Yao Li,Tuoyu Lin,Meiwei Guo,Liying Zhang,Sen Qiao
Microbial piezoelectric-synthesis of formate from CO 2 reduction was achieved. • Energy band theory mechanism dominates piezoelectric electron generation by MoSe 2 . • The system exhibited high efficiency of hydraulic kinetic energy conversion. • Good scalability and stable performance for formate production was demonstrated. Piezoelectric-driven microbial synthesis processes promise green production of valuable chemicals by directly utilizing the abundantly-available hydraulic kinetic energy in various water bodies. However, their practical application is currently hindered by the sluggish reaction kinetics and limited knowledge on the catalytic mechanisms. Additionally, the potential of such bio-hybrids for chemical synthesis by utilizing carbon dioxide as sole carbon source is largely unexploited. Here, we constructed an efficient microbial piezo-synthesis (MPS) system, consisting of molybdenum diselenide nanoflowers and Shewanella oneidensis MR-1 cell, for autotrophic formate synthesis. The piezoelectric catalysis mechanisms by which piezoelectric electrons are generated and transferred across the biohybrid interface were elucidated. Energy band theory mechanism dominates the piezoelectric electron generation in this system, enabling efficient uptake of piezoelectric electrons by S. oneidensis MR-1 to drive CO 2 reduction and metabolism. Powered by hydraulic kinetic energy, the MPS system achieved efficient formate synthesis (5.3 mg·L −1 ·h −1 ) with superior stability. Overall, our work lays an important scientific basis for optimized design of piezoelectric- bio-hybrid, and unveils a tremendous potential of the water body as a self-powered green factory for chemical production coupled with carbon reduction. Download: Download high-res image (247KB) Download: Download full-size image
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
C.C. Wang,Y. Zhu,Y.M. Hu,M.R. Dong,J.K. Liu
In this paper, Ag 8 SnS 6 powder was synthesized by the one-pot method, then prepared into Ag 8 SnS 6 and Selenization treated Ag 8 SnS x Se 6-x thin films. The effects brought by the amounts of added Se powder during the annealing process on the product phases, structures, and morphologies are characterized, and the electrochemical property and the cell efficiency as assembled into the counter electrode (CEs) for dye-sensitized solar cells (DSSCs) were investigated. It showed Se into the Ag 8 SnS 6 lattice occupied the site of S to transform into Ag 8 SnS x Se 6-x . And the thin film also became unflatten since the particles became larger after Se doping. The cell efficiency of Ag 8 SnS x Se 6-x CEs reached 4.26%, which was increased by 28.31% compared to that of Ag 8 SnS 6 CEs. Ag 8 SnS x Se 6-x CEs performed lower charge transfer resistance (Rct) and (△EPP), and an increased△E value between the conduction band level of CEs and the redox potential of electrolyte. After 10 cycles, the almost unchanged cathode/anode current density implied the Ag 8 SnS x Se 6-x CEs received good structure stability. Selenization treatment was able to facilitate electron transport and enhance the electrocatalytic activity, and as expected to be a promising method in improving the performance of the DSSCs.
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ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Hui Wang,Weili Wang,Qianqian Xie,Di Wu,Jiayu Cao,Huilin Chen,Meng Gao,Huizhen Zheng,Xi Liu,Jie Jiang,Wenjie Li,Xiaoming Cai,Sergey V. Gudkov,Ruibin Li
Fine particulates (FPs) are a major class of airborne pollutants. In mammals, FPs may reach the alveoli through the respiratory system, cross the air–blood barrier, spread into other organs, and induce hazardous effects. Although birds have much higher respiratory risks to FPs than mammals, the biological fate of inhaled FPs in birds has rarely been explored. Herein, we attempted to disclose the key properties that dictate the lung penetration of nanoparticles (NPs) by visualizing a library of 27 fluorescent nanoparticles (FNPs) in chicken embryos. The FNP library was prepared by combinational chemistry to tune their compositions, morphologies, sizes, and surface charges. These NPs were injected into the lungs of chicken embryos for dynamic imaging of their distributions by IVIS Spectrum. FNPs with diameters <16 nm could cross the air–blood barrier in 20 min, spread into the blood, and accumulate in the yolk sac. In contrast, large FNPs (>30 nm) were mainly retained in the lungs and rarely detected in other tissues/organs. In addition to size, surface charge was the secondary determinant for NPs to cross the air–blood barrier. Compared to cationic and anionic particles, neutrally charged FNPs showed the fastest lung penetration. A predictive model was therefore developed to rank the lung penetration capability of FNPs by in silico analysis. The in silico predictions could be well validated in chicks by oropharyngeal exposure to six FNPs. Overall, our study discovered the key properties of NPs that are responsible for their lung penetration and established a predictive model that will greatly facilitate respiratory risk assessments of nanoproducts.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yajie Guo,Kelun Jia,Fei Dai,Yongjie Liu,Chunrui Zhang,Jibo Su,Ke Wang
The progress of inexpensive, high-efficiency, and steady oxygen evolution reaction (OER) electrocatalysts is of great importance to promoting water splitting for green hydrogen production. Herein, tri-metallic NiCoFe selenide catalyst backed up by carbon fiber paper (CFP) was synthesized by a facile selenization of NiCoFe Prussian blue analogues (PBAs) for OER in alkaline solutions. The NiCoFe-Se/CFP inherited the porous nanostructure of the metal-organic frameworks (MOFs) precursors prepared by rapid cyclic voltammetry electrodeposition. Benefiting from the 3D hierarchical porous structure, optimized electronic structure of NiCoFe selenides and high conductivity, the synthesized electrocatalyst exhibits outstanding catalytic activity to the corresponding mono-metallic or bi-metallic selenides. Specifically, the NiCoFe-Se/CFP electrode demands an overpotential of 221 mV to attain the 10 mA cm −2 current density in 1.0 M KOH solution and a low Tafel slope of 38.6 mV dec -1 . The prepared catalyst also displays good stability and durability. These findings prove a feasible strategy to further improve the catalytic activities of non-precious metal based OER electrocatalysts by the cooperation of structure design and chemical component modification.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Meng Wang,Yanwen Zhou,Zhaohui Wang
The critical shortage of antifungal drugs and increasingly emerged resistant fungi urgently call for the development of novel fungicidal agents with translational potential. Although nanodrugs compose a new antifungal arsenal, the fungicidal efficacy barely exceeds clinical molecules. In this study, a CuFeSe 2 -PVP nano-blade, is unexpectedly discovered with ultrapotent intrinsic fungicidal efficacy. This nanostructure is facilely fabricated by a specific aqueous precipitation method with the nucleation of tetragonal eskebornite CuFeSe 2 at PVP chains. The unique semiconductor CuFeSe 2 -PVP demonstrates superior antifungal activity than the commonly used small-molecule drugs and metal nanoparticles in both planktonic fungi and biofilm. Intriguingly, electron microscopy visualizes that the nano-blades cut fungal membranes with fungi surfaces inserted by the blades. Such a membrane-piercing effect results in the loss of important intracellular components, including nucleic acids , proteins, and potassium ions. Increased intracellular reactive oxygen species (ROS) is also observed. Encouragingly, in mice with subcutaneous fungal infection, the nanodrug achieves absolute fungi clearance, effectively alleviating inflammation and promoting collagen fiber recovery. Moreover, the excellent biocompatibility of CuFeSe 2 -PVP promises great potential for further translation. This study not only provides a novel fungicidal drug candidate, but also inspires the future design of anti-fungal nanomedicine .
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Deng Long,Jia Liu,Hongyu Chen,Pei Liu,Kai Zheng,Yibo Zeng,Xinyi Chen,Shuang Li,Miao Lu
How to passivate the recombination in a photocatalyst is a big challenge to achieve efficient photocatalytic CO 2 reduction. Besides the heterojunction strategy, the design of intrinsic built-in electric field in a single phased photocatalyst can facilitate the transport while it does not introduce extra side reactions induced by the unbalanced photocarriers. This work utilizes the electronegative diversity between chalcogens and non-chalcogen element in a quarternary transition metal dichalcogenide of MoS x Se y N z to define localized built-in electric fields. It has been revealed that the nitrogen induced intrinsic dipole moments and potential energy have strenghthened the built-in electric fields, promoting the separation of photocarriers and the gathering of electrons around N sites, which has been found to improve the adsorption of intermediate products and lower the energy for methanol-oriented photoproduction route. Finally, the MoS x Se y N z has improved the photoproduction of methanol reduced from CO 2 by 162%.
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MOLECULES
·
2023
·Vol. 28
·期 6
·2629
·
IF 4.6
Xinru Ma,Xuxia Shai,Yu Ding,Jie Zheng,Jinsong Wang,Jiale Sun,Xiaorui Li,Weitao Chen,Tingting Wei,Weina Ren,Lei Gao,Shukang Deng,Chunhua Zeng
Thermoelectric (TE) technology, which can convert scrap heat into electricity, has attracted considerable attention. However, broader applications of TE are hindered by lacking high-performance thermoelectric materials, which can be effectively progressed by regulating the carrier concentration. In this work, a series of PbSe(NaCl)x(x = 3, 3.5, 4, 4.5) samples were synthesized through the NaCl salt-assisted approach with Na+and Cl−doped into their lattice. Both theoretical and experimental results demonstrate that manipulating the carrier concentration by adjusting the content of NaCl is conducive to upgrading the electrical transport properties of the materials. The carrier concentration elevated from 2.71 × 1019cm−3to 4.16 × 1019cm−3, and the materials demonstrated a maximum power factor of 2.9 × 10−3W m−1K−2. Combined with an ultralow lattice thermal conductivity of 0.7 W m−1K−1, a high thermoelectric figure of merit (ZT) with 1.26 at 690 K was attained in PbSe(NaCl)4.5. This study provides a guideline for chemical doping to improve the thermoelectric properties of PbSe further and promote its applications.Keywords:chemical doping;salt-assisted;NaCl doping;PbSe;thermoelectric material;thermoelectric performance
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