Nature Communications
·
2026
·
IF 15.7
Lai Dingbo,Yu Jia,Ma Zi-Ang,Ye Xiaolin,Wang Chaoxi,Zhang Junqing,Wang Tuo,Zhao Zhi-Jian,Zhang Peng,Gong Jinlong
The electrochemical C–N coupling of biomass-derived 5-hydroxymethylfurfural (HMF) with methylamine offers a promising sustainable route to value-added amines. However, achieving high selectivity remains challenging due to competing side reactions, including C = O hydrogenation and C–C dimerization. This paper describes tailoring the surface structure of Ag catalysts to modulate HMF adsorption and intermediate hydrogenation behavior and thus enhancing C–N coupling selectivity. Ag nanoparticles, predominantly exposing the (111) facet, exhibit higher selectivity compared with Ag nanocubes mainly enclosed by (100) planes. The Ag(111) facet favors the C–N coupling pathway by regulating both adsorption geometry and hydrogenation ability. In-situ Raman spectroscopy and density functional theory (DFT) calculations reveal that an η 1 (C)-aldehyde adsorption configuration, dominant on Ag(111), enhances carbonyl electrophilicity and facilitates C = O polarization, promoting nucleophilic attack by methylamine. In contrast, the η 2 (C,O)–aldehyde configuration, more common on Ag (100), stabilizes the C = O bond, limiting its reactivity. Moreover, Ag(111) shows enhanced imine hydrogenation activity, further improving amine selectivity. This study highlights the significance of facet-dependent adsorption modulation in steering reaction pathways and advancing sustainable electrochemical synthesis.
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ADVANCED MATERIALS
·
2026
·
IF 26.8
Zhechen Fan,Shuhu Yin,Wenhao Miao,Yudie Zhou,Weiyi Zhao,Yixuan Yin,Hao Yu,Lin Lin,Lina Hou,Hao Wan,Ying Wang,Junjie Ge
Atomically dispersed Fe–N–C catalysts are regarded as promising alternatives to platinum-group-metal (PGM) catalysts for proton exchange membrane fuel cells (PEMFCs). However, their further development is hindered by inadequate utilization of active sites in membrane electrode assembly (MEA). Herein, we developed a high mass activity O–FeNC catalyst with high site density and enhanced site utilization. C═O groups function as hard base linkers, promoting the densification of FeN 4 sites through Lewis acid-base interactions. Moreover, they also direct interfacial alignment within triple-phase boundaries, leading to concentrated hydronium ions and accelerated oxygen permeation via regulated ionomer nanophase segregation. As a result, the obtained O–FeNC cathode delivered a current density of 66.45 mA cm −2 at 0.90 V iR-free , surpassing the US Department of Energy 2025 target (44 mA cm −2 at 0.9 V iR-free ), with a mass activity that is 59% higher than commercial Pt/C. The peak power densities reached 1.8 W cm −2 under H 2 –O 2 and 0.93 W cm −2 under H 2 –air, alongside demonstrated industrial scalability through gram-scale synthesis and a 500 W PGM-free cathode stack prototype.
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Journal of Energy Storage
·
2026
·
IF 9.8
Xiang Yu,Fengkai Wang,Wenqi Zhang,Rui Yang,Zhongyao Chai,Sidi Fan
Thin-film capacitors, utilized for capacitive energy storage, hold significant importance in modern power and electronic systems. To fulfill high-temperature demands, polymers with high glass transition temperatures are adopted for thin-film preparation. However, high-temperature energy density still suffers from exponentially increasing leakage currents. Here, we incorporate ZIF-8 metal-organic framework fillers in the matrix of poly ( m -phenylene isophthalamide) (PMIA) to prepare the composite films. ZIF-8 exhibits organic compatibility due to its organic ligands, and it owns self-stability, devoid of inducing the PMIA chain plasticization. Strong hydrogen bonds form between the amide groups in PMIA and imidazole rings in ZIF-8, optimizing the PMIA chain conformation with minimized free volume. Accompanied by electron scattering at the PMIA/ZIF-8 interfaces, leakage current is reduced by one order of magnitude. At a 0.3 wt% content, the film exhibits a breakdown strength of 688.9 MV·m −1 at 150 °C and 609.9 MV·m −1 at 200 °C. Furthermore, the polyhedron geometry of ZIF-8 intensifies interfacial polarization, yielding a high dielectric constant of 5.72 at 200 °C and 100 Hz, and a low dielectric loss confined by the hydrogen bonding network. These improvements achieve a maximum energy density of 12.88 J·cm −3 at 150 °C and 9.45 J·cm −3 at 200 °C, highlighting its potential for high-temperature energy storage.
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LANGMUIR
·
2025
·
IF 3.9
Jun Yu,Yi Liu,Mengqi Wang,Xiaoxin Guo,Xingyu Zhang,Yihang Dong,Jiawei Yan,Keqin Zhang,Yuqing Liu
Hydrophilic modification of materials is crucial for optimizing the performance of flexible supercapacitors, which are promising energy-storage devices for flexible and wearable electronics. However, enhancing the wettability of coaxial electrospun membranes to facilitate the uniform growth of active materials and improve electrochemical performance remains a key challenge. Herein, we propose a hydrophilic modification strategy using ethanolamine (MEA) heat treatment, which significantly enhances the wettability of coaxial electrospun CNT/MOF-5/PAN/PVDF (C-MNF) membranes and promotes the uniform in situ growth of Co3O4 nanoneedles. Characterization results reveal that hydrophilic modification improves the penetration and diffusion of Co2+ ions within the substrate, optimizing the nucleation and growth environment for Co3O4 crystals. By integrating multiple mechanisms such as Zn2+/Co2+ ion exchange, Fe3+-induced oxidation, and spontaneous crystal transformation, the material’s interface structure and electrochemical performance were synergistically enhanced. The resulting Co3O4@C-MNF composite electrode achieved a mass-specific capacitance of 310 F g–1 at 0.5 A g–1, with good rate performance (250 F g–1 at 10 A g–1) and low interfacial resistance (∼51 Ω). A symmetric supercapacitor device constructed with the modified material exhibited a maximum energy density of 4.94 Wh kg–1, high cycling stability (94.2% capacity retention after 8000 cycles), and stable output in various bending states. These results highlight the potential of the device for flexible, wearable energy storage applications and provide an approach and material system for the design of high-performance flexible supercapacitors.
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ACS Sensors
·
2026
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IF 10.9
Pang Lok Tim,Lam Miu Ling,Szeto Cheuk Chun,Chen Ting-Hsuan
Urinary cystatin C (uCysC) has emerged as an endogenous biomarker for renal impairment. In managing renal pathologies, early screening and monitoring of disease progression are crucial for both at-risk individuals and diagnosed patients. The ultimate goal is to prevent and mitigate the associated risks of morbidity and mortality, thereby promoting longevity. However, conventional methods for quantifying uCysC have limitations that hinder their applications in point-of-care for resource-limited settings. In this study, we provide a sample-to-answer quantitative rapid test to monitor uCysC levels. The device uses a vent for urine sampling with a fixed volume, gravitational sedimentation for effective on-device reaction, and a dual-microbead immunoassay for the length-based visual quantification of uCysC. The achieved limit of detection (LOD) is 33.33 ng/mL, with excellent selectivity, pH level tolerance, and high accuracy. This all-in-one device bypasses peripheral lab settings to enable low-cost testing of renal impairment, which will benefit both general users and medical practitioners for telemedicine applications and large-scale disease self-management.
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Journal of Materials Chemistry B
·
2025
·
IF 5.7
Siyue Wang,Xiaotian Guan,Shuqing Sun
C-reactive protein (CRP) is a well-established biomarker whose plasma levels increase significantly during inflammatory and infectious episodes. It plays a vital role in the diagnosis of bacterial infections, autoimmune diseases, and cardiovascular risk assessment. However, conventional detection techniques often struggle to balance high sensitivity with a broad dynamic range. Here, we developed and validated a novel fluorescence-based aptasensor named AuCA (AuNP-enhanced CRISPR Aptasensor), which integrates nucleic acid aptamers, magnetic beads (MBs), gold nanoparticles (AuNPs), and the CRISPR/Cas12a system for robust CRP quantification. In this system, MBs functionalized with aptamer 1 selectively captured the target protein, while AuNPs co-modified with aptamer 2 and a Cas12a activation sequence (Trigger) enabled efficient signal transduction. Upon target binding, the Trigger activated the Cas12a/crRNA complex, initiating trans-cleavage of fluorescent reporters and producing a markedly amplified signal. The optimized AuCA platform achieved a low detection limit of 60 ng/mL and a quantifiable range of 0.1 -150 µg/mL. It exhibited excellent specificity and resistance to biological interference, ensuring reliable measurements even in complex sample matrices. When applied to clinical human plasma, AuCA demonstrated strong concordance with results from a commercial immunoturbidimetric assay. AuCA allowed the simultaneous detection of both standard and hypersensitive CRP (hsCRP), supporting comprehensive full-range CRP (frCRP) analysis with strong potential for clinical application.
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Journal of Energy Storage
·
2025
·
IF 9.8
Changxu Yang,Jiahe Zhang,Shuo Zhang,Zhenyang Song,Duanyi Li,Chuqin Wang,Ke Wang,Jingang Liu
Si/C anode is regarded as a competitive candidate for next generation lithium-ion batteries due to its outstanding specific capacity. However, the practical application of Si/C anode is still obstructed by its significant volumetric variation during charging and discharging. Numerous studies have demonstrated that polyimide (PI) can effectively mitigate volumetric deformation. However, the majority of these investigations have predominantly utilized insoluble PI, whose high-temperature imidisation process would produce large internal stresses and holes that are detrimental to the performance of the battery. In this study, two types of soluble polyimides were synthesized and applied to Si/C anode: a fluorine- and silicon-containing variant and a fluorine- and amino-group-containing variant. Both PI-FS and PI-FN have relatively well bonding properties. Meanwhile, PI-FN, which introduces amino groups, has lower energy gap and better conductive ability. Compared with PVDF, the PI-based binder changes the component distribution of the solid electrolyte interface and significantly improves the cycling stability of the Si/C anode.
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Advanced Energy Materials
·
2017
·Vol. 7
·期 15
·1700087
·
IF 16.721
Ting Jin,Yongchang Liu,Yang Li,Kangzhe Cao,Xiaojun Wang,Lifang Jiao
NaVPO 4 F has received a great deal of attention as cathode material for Na-ion batteries due to its high theoretical capacity (143 mA h g −1 ), high voltage platform, and structural stability. Novel NaVPO 4 F/C nanofibers are successfully prepared via a feasible electrospinning method and subsequent heat treatment as self-standing cathode for Na-ion batteries. Based on the morphological and microstructural characterization, it can be seen that the NaVPO 4 F/C nanofibers are smooth and continuous with NaVPO 4 F nanoparticles (≈6 nm) embedded in porous carbon matrix. For Na-storage, this electrode exhibits extraordinary electrochemical performance: a high capacity (126.3 mA h g −1 at 1 C), a superior rate capability (61.2 mA h g −1 at 50 C), and ultralong cyclability (96.5% capacity retention after 1000 cycles at 2 C). 1D NaVPO 4 F/C nanofibers that interlink into 3D conductive network improve the conductivity of NaVPO 4 F, and effectively restrain the aggregation of NaVPO 4 F particles during charge/discharge process, leading to the high performance.
研究领域:
材料科学
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电化学
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纳米技术
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能源存储
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无机非金属材料
·
固态化学
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高影响因子
SCRIPTA MATERIALIA
·
2018
·
IF 4.163
Lili Guan,Jian Li,Xiwen Song,Jinxiao Bao,Tao Jiang
Flash sintering of Sm 2 O 3 doped CeO 2 ceramics can be triggered at 25 °C due to the presence of graphite. The current density rise non-linearly to a set limit value in the voltage control stage under an initial electric field of 30 V cm −1 . The calculated conductivity activation energy in this stage is 0.30 eV, which is closely in relation to the electronic conduction of graphite. As graphite is beginning to oxidize, the conductivity of the sample rapidly decreases. While graphite has been completely oxidized, the specimen temperature provides adequate support for the persistence of flash sintering process .
研究领域:
材料科学
·
陶瓷
·
固体离子学
·
电场辅助烧结
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CERAMICS INTERNATIONAL
·
2022
·Vol. 48
·期 20
·30384-30392
·
IF 5.532
Shiyu Li,Suhua Chen,Caiyan Yu,Huiling Zhao,Yanfeng Yin,Xiaosheng Song,Ying Bai,Lijun Gao
The development of a polyanion cathode for sodium-ion batteries is expected to accelerate the application of sodium-ion batteries in large-scale energy storage systems . However, the poor electrode conductivity is still a great challenge. In this paper, the novel carbon composite polyanion compound Na 3.16 Fe 2.42 (P 2 O 7 ) 2 @C (NFP@C) is developed through high-energy ball milling followed by annealing. The porous NFP nanoparticles modified with dual-functional C-composited for amorphous carbon coating and carbon nanofibers interpenetrating deliver excellent capacity retention of 85.3% after 1000 cycles at 5 C, which is more outstanding than pure NFP. X-ray diffraction, in situ galvanostatic intermittent titration techniques, electrochemical impedance spectroscopy , and cyclic voltammetry were performed to investigate the stability and sodium diffusion of NFP@C. The results show that the systematic and comprehensive dual-functional conductive network modification enables NFP exhibit excellent electronic and ionic conductivities , thereby improving the rate capability and cycling stability. Furthermore, a soft package sodium-ion full battery assembled based on NFP@C reveals a high-capacity retention of 95.2% for 150 cycles at 0.5C. This carbon composite strategy is simple and efficient and could be easily and widely extended to other cathodes in grid-scale energy storage applications .
研究领域:
能源材料
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电化学
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电池技术
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纳米材料
·
可持续储能
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Xiang Qin,Yunkang Ji,Lijuan Nong,Chendi Wang,Huiting Li,Chunyu Xie,Lijun Ji,Aiping Zhu
C/Ti 3 C 2 /(001)TiO 2 hollow microspheres were prepared by combining the template method, self-assembly and hydrothermal method . Anatase TiO 2 nanosheets with rich oxygen vacancies formed on the microspheres and exposed active (001) facets due to the spherical surface. TC was removed 92.3% by C/Ti 3 C 2 /(001)TiO 2 -HMs within 160 min, 28.4% by TiO 2 and 49.5% by (001)TiO 2 /Ti 3 C 2 under the same condition. The high removal efficiency of C/Ti 3 C 2 /(001)TiO 2 -HMs could be because the oxygen vacancies exposed on the surface of (001)TiO 2 afforded more active sites, extended the light absorption range and promoted the generation of electron-hole pairs. The composite C/Ti 3 C 2 /(001)TiO 2 structure could suppress the recombination of electron-hole pairs and prolong their lifetime. The degradation pathway of TC was discussed. The TC removal efficiency of C/Ti 3 C 2 /(001)TiO 2 -HMs was confirmed by treating the wastewater from the Slender West Lake. The production principle of oxygen vacancy could be used for preparing MXene composites with excellent catalytic properties and the C/Ti 3 C 2 /(001)TiO 2 -HMs could be a potential choice for treating wastewater.
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NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 13
·6405-6411
·
IF 3.3
Xiaoming Zhou,Yang Liu,Liming Chen,Guohui Yuan
High-performance SiOx/C composites are currently one of the potential anodes for practical lithium-ion batteries. However, the dispersion of carbon in previous SiOx/C composites is usually uneven at the microscopic scale, where the anisotropic volume expansion generates continuous attenuation of coulombic efficiency in long-term cycling, resulting in a poor cycling performance. In the research reported here, the monodisperse SiOx/C spheres with a size of 200–1000 nm are prepared by a simple chemical polymerisation combined with high-temperature carbonisation. 3-Aminopropyltriethoxysilane and glutaraldehyde are selected as the silicon and carbon sources to form the spherical polymer by an aldimine condensation reaction. The organic carbon in the precursor is transformed in situ into amorphous carbon, which is uniformly located in the Si–O–Si framework at the ultrafine nanoscale. Because of the unique structural nature, the synthesised SiOx/C spheres demonstrate a long service lifespan together with a high coulombic efficiency. This work provides a practical design for reliable SiOx/C anodes.
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