International Journal of Electrochemical Science
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2023
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IF 1.5
Dacheng Zhang,Linlin Wang,Qian Wu,Yujie Yang,Jingli Xu
In this work, a novel N/O Co-doped hollow carbon nanocapsule-supported Ge nanoparticles nanocomposite (Ge-N/O-CNCs) was successfully prepared by a facile heating reflux method. N/O codoped hollow carbon nanocapsule-supported Ge nanoparticles not only relieve the agglomeration of Ge nanoparticles and control the volume expansion, but also facilitate the rapid transmission of electrons. In LIBs, the unique Ge-N/O-CNCs nanoarchitecture was used as the anode material. At a high current density of 1 A g -1 , it remains a stable specific capacity of 448 mAh g -1 remained after 100 cycles. Additionally, even at 3.2 A g -1 , this material exhibited a high-rate specific capacity of 350 mAh g -1 .
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2018
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IF 5.667
Yongbin Zhang,Yongfei Huang,Yongkang Yue,Jianbin Chao,Fangjun Huo,Caixia Yin
Because of the high toxicity of hydrazine, the development of ultrasensitive fluorescent probes for hydrazine has been challenging. In this work, an ultrasensitive fluorescent probe based on o -phthalaldehyde has been exploited for hydrazine. The probe was designed based on creating an efficient fluorophore by incorporating hydrazine into o -phthalaldehyde framework via an intermolecular condensation-cyclization reaction. The probe could quickly detect hydrazine and displayed a high sensitivity for hydrazine with a LOD of 1.9 nM (0.06 ppb), which is far below the U.S. Environmental Protection Agency standard (10 ppb). Moreover, the probe was successfully applied to the detection of hydrazine in real water samples and hydrazine vapor.
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Catalysts
·
2026
·Vol. 16
·期 10
·919
·
IF 4.5
Guanghua Chen,Ning Cao,Zhonghao Deng,Xiangqing Zhang,Xiao Wang,Chong Peng,Liling Fang,Xusheng Ao,Shaobin Tan,Weibin Qiu
Nitrate, as a core component of water pollution, poses a severe threat to the ecological environment and human health. Electrochemical ammonia synthesis via nitrate reduction (NO3RR) is a highly promising sustainable technology, yet the simultaneous achievement of high activity and high selectivity remains a critical challenge in this field. Conventional Cu-based catalysts suffer from insufficient intrinsic activity and sluggish reaction kinetics. Moreover, the Cuδ+active sites are prone to valence evolution and structural reconstruction during electrocatalysis, making it difficult to meet the demands of long-term industrial-scale operation. To break through the aforementioned bottlenecks, this study proposes a rare-earth-regulated electronic structure engineering strategy. By constructing a Cu 3d–O 2p–La 4f gradient orbital coupling system, the surface chemisorption behavior of transition metals is precisely optimized, and the electron transfer pathway is efficiently modulated. The introduction of La not only strengthens electron delocalization and transport through the gradient orbital channel to enhance the adsorption and activation capability of NO3−, but also stabilizes the Cuδ+active sites via its unique 4f electronic structure, optimizes the adsorption energy of key intermediates, and synergistically boosts the catalytic performance. Experimental results demonstrate that the optimized La0.02-CuOxelectrode exhibits no obvious performance degradation after continuous operation for 30 h at a large current density of 2.5 A cm−2, delivering an ammonia yield of 186.99 mg·h−1·cm−2and a Faradaic efficiency of 94.39%. This rare-earth orbital coupling strategy provides a new research insight for the rational design of highly stable Cu-based NO3RR catalysts.
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ACS Sustainable Chemistry & Engineering
·
2026
·Vol. 14
·期 29
·13042-13055
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IF 7.6
Lau Chun-Yin,Li Xinwei,Zhang Yanlin,Rangarajan Goutham,Tse Ho-Yin,Zhuang Huichuan,Leu Shao-Yuan,Farnood Ramin R.
In this study, an amorphous carbon-rich carbon nitride photocatalyst was prepared by nitric acid treatment of pyrolyzed melamine followed by nitrogen annealing. The resulting semiconductor material exhibited an up-shifted valence band that enhances the oxidizing power of photogenerated holes, enabling selective C α −C β bond cleavage of 2-phenoxy-1-phenylethanol (2-POE). Using 1.5 g L −1 of the optimized photocatalyst in acetonitrile, 2-POE underwent first-order conversion with a reaction rate of 2.55 h −1 under a 9 W blue LED light source. Product analysis showed the formation of benzaldehyde as the major product, confirming C−C bond scission with 93.1% selectivity. In addition, ring-opening reactions were observed, producing fumaric and maleic acids as the by-products. Photocatalytic depolymerization of organosolv lignin further demonstrated ring opening of the β-O-4 linking motifs, forming dicarboxylic acids analogous to those generated from 2-POE. These demonstrate a metal-free photocatalytic platform capable of promoting β-O-4 bond cleavage in lignin model compounds and inducing photocatalytic structural modification of organosolv lignin, accompanied by the formation of low-molecular-weight aliphatic dicarboxylic acids.
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ADVANCED MATERIALS
·
2026
·
IF 29.1
Yang Hu,Xiaoyue Lu,Mingche Huang,Erhong Song,Bowen Chen,Feiyan Cai,Yuefan Xu,Yinjie Ruan,Chaobin Zeng,Ling Lin,Yan Gu,Yusheng Ding,Dewei Ni,Shaoming Dong
The initial oxidation stage of high-entropy carbides (HECs) is a decisive yet poorly understood “black box” that governs their ultimate performance for ultra-high-temperature applications. Here, we unveil a powerful strategy—predesigning carbon vacancies—to fundamentally enhance HECs oxidation resistance. By integrating in situ x-ray diffraction (XRD) and in situ transmission electron microscopy coupled with electron energy loss spectroscopy (TEM-EELS), we provide the first direct, atomic-scale visualization of oxygen atoms preferentially occupying these predesigned vacancies during the incipient oxidation stage, leading to the dynamic formation of a metastable metal–carbon–oxygen (M–C–O) interfacial layer. Our combined experimental and theoretical analyses reveal a dual enhancement mechanism: kinetically, M–C–O suppresses both oxygen adsorption on the (111) surface and its subsequent inward diffusion; thermodynamically, they stabilize the HEC lattice at elevated temperatures, thereby increasing the energy barrier for M─C bond cleavage. This work not only deciphers the atomistic origin of enhanced oxidation resistance but also establishes a simple, general, and efficient design principle for next-generation ultra-high-temperature ceramics.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Yaning Gong,Dingyu Qiu,Xingchen He,Junhui Shao,Najun Li,Dongyun Chen,Hua Li,Qingfeng Xu,Jianmei Lu
Hybrid HfO 2 -PMA subnanobelts are synthesized by cluster–nuclei co-assembly. • Subnanometer belt morphology enhances piezoelectric polarization response. • Hf-O-Mo interfacial orbital coupling enhances charge separation. • PMA redox pairs act as electron buffers for efficient CO 2 activation. • Dilute CO 2 is efficiently converted into syngas via piezocatalysis. Efficient piezocatalytic conversion of dilute CO 2 into syngas offers a sustainable route for industrial flue gas valorization, yet conventional piezoelectric materials are often constrained by lattice rigidity and rapid charge recombination under weak mechanical stress. Herein, we constructed ultrathin 1D HfO 2 -phosphomolybdic acid (PMA) hybrid subnanobelts (SNBs) via cluster-nuclei co-assembly. The subnanometer architecture and flexible morphology induce an intense polarization response by leveraging the piezoelectric size effect, enabling HfO 2 -PMA SNBs to achieve remarkable CO and H 2 production rates of 4.5 and 5.8 mmol g −1 h −1 , respectively. In-situ FTIR spectra and density functional theory (DFT) calculations reveal that the asymmetric Hf-O-Mo interfacial coordination induces spontaneous electron transfer from HfO 2 to PMA, constructing a robust built-in electric field. Concurrently, the reversible redox properties of PMA clusters further enrich interfacial electron density and facilitate CO 2 adsorption and activation through Hf-O-Mo coupling, lowering the formation energy barrier of the key *COOH intermediates. This interfacial electronic structure engineering strategy establishes a novel paradigm for mechanical-energy-driven CO 2 conversion and offers a new approach for designing emerging sub-nanometer piezocatalysts. Download: Download high-res image (202KB) Download: Download full-size image
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ADVANCED POWDER TECHNOLOGY
·
2026
·Vol. 37
·期 9
·105408
·
IF 4.5
Xiaoying Huang,Mingliang Xiang,Xiao Jin,Min Nie,Wei Xu,Rie Umetsu,Qing Yang,Yanan Chen,Jun-Qiang Wang,Yan Zhang
With the rapid advancement of power electronics toward high-frequency and miniaturization, there is an urgent demand for soft magnetic composites (SMCs) that possess both high permeability and low core loss. Herein, a novel Cr-O&(Ni,Zn)Fe 2 O 4 synergistic hybrid insulation was synthesized on FeSiBCCr amorphous powders via sequential hydrothermal and chemical co-precipitation methods. The oxygen partial pressure during annealing was optimized using 0.8 wt.% carbon powder to enhance the crystallinity and magnetic properties of the ferrite insulating coating. The resulting SMCs exhibited a saturation magnetization ( M s ) of 140.0 emu/g and an effective permeability ( μ e ) of 35.03. Notably, the core loss P 50mT/1MHz was reduced to 2143.10 mW/cm 3 , which is 50.72% lower than that of the core sample prepared by using raw powder without ferrite insulating coating. This synergistic hybrid insulation effectively suppresses inter-particle eddy currents and reduces domain wall pinning, offering a high-performance solution for high-frequency power electronics.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Yuxin Zuo,Wenjie Wei,Yaran Wang,Shen Wang,Zhongjun Wang,Yu Shu,Zhiqi Liu
Linear low-density polyethylene (LLDPE) films have garnered significant attention. However, their poor thermal insulation properties and limited functionality severely restrict applications. This study prepared an LDH/LLDPE composite film (LD-1.5%K) with excellent optical properties and high-performance infrared insulation by blending γ-(methacryloyloxy) propyltrimethoxysilane (KH570) dry-modified layered double hydroxide (D200) with LLDPE. D200 exhibits a refractive index close to LLDPE. Its incorporation significantly reduces the average infrared transmittance of LLDPE films. Surface modification of D200 with KH570 promotes uniform blending with LLDPE. As a result, the LD-1.5%K film delivers outstanding optical properties (high visible light average transmittance of 90.8%, and low haze of 23.5%) The film also achieves low infrared average transmittance. This low infrared transmittance endows LD-1.5%K film with excellent heat retention (up to 4°C) and recyclable stability. Consequently, this approach promotes crop growth and offers good economic value. Applying LD-1.5%K in areas with strong ultraviolet radiation and cold climates is effective. It provides a promising solution for future cultivation in harsh environments.
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CARBOHYDRATE POLYMERS
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2026
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IF 13.2
Jinpeng Zhai,Chao Liu,Lijuan Sun,Beichen Xue,Yongxin Wu,Rui Xiao
Biomass-derived carbohydrates, as abundant and renewable feedstocks, hold great promise for producing porous carbon materials (PCMs) applicable in CO 2 capture and syngas purification. This study presents a novel strategy for synthesizing N, O-dual doped carbon (NOC) materials through co-pyrolysis using 5-hydroxymethylfurfural (5-HMF) and chitosan (CTS) as precursors, wherein 5-HMF acts as a structural modulator. Combining experimental characterization with density functional theory (DFT) calculations, this work systematically investigated the synergistic mechanism between functional group evolution and carbon framework construction during co-pyrolysis, and elucidated the influence of N, O doping configurations on CO 2 adsorption selectivity. The results indicate that the incorporation of 5-HMF promotes a three-step reaction pathway introducing N, O-containing functional groups such as imine group (C=N) and carbonyl (C=O). The NOC prepared at 800 °C exhibited a CO 2 /H 2 selectivity of 43.4 and a CO 2 /(CO + H 2 ) multicomponent selectivity of 24.4 in a continuous flow (CO 2 /CO/H 2 , 25 °C, 1 bar). Theoretical calculations further revealed that the synergistic coupling of pyridinic N and carbonyl groups on the carbon surface significantly enhances surface polarity and Lewis basicity, thereby strengthening the selective adsorption of polar CO 2 molecules via Lewis acid-base interactions and electrostatic induction.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yanzhi Cai,Xue Huang,Laifei Cheng,Yalong Chai,Zixuan Yu,Mingxing Chen,Shaoxiong Ren,Jiaoe Dang
Achieving self-supporting superflexible binder-free composites where all components serve simultaneously as structural backbones and microwave-absorbers is a technical challenge. This study successfully combined several microwave absorbing materials, including Fe 3 O 4 , NiCo-MOF derivatives, and CNTs, into a binder-free self-supporting superflexible Buckypaper in one step through directional pressure filtration. Fe 3 O 4 -CoNi-MOF was in-situ grown on a single CNT to form a magnetic MOF-coated CNT (CNT@MOF), which was then subjected to high-temperature carbonization to obtain a magnetic MOF-derived carbon-coated CNT (CNT@Fe 3 O 4 /CoNi-C). The combination of Fe₃O₄/CoNi-MOF and CNTs simultaneously promotes magnetic loss and dielectric loss, thereby significantly enhancing impedance matching and electromagnetic energy attenuation capabilities. The optimal carbonization temperature for the CNT@Fe 3 O 4 /CoNi-C Buckypaper is 700 ℃, at which the minimum reflection loss (RL min ) is −58.12 dB and the absorption bandwidth is 5.02 GHz. The interweaving of CNTs forms a robust yet superflexible skeleton, while the in-situ growth of Fe₃O₄/CoNi-MOF derivatives on a single CNT enhances the structural stability of the skeleton. The Buckypaper remains intact after repeated 2 mm-radius curling, knotting, 180° bending. Therefore, this study presents new insights into the preparation of self-supporting, superflexible MOF-derived microwave absorption materials.
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CHINESE JOURNAL OF CATALYSIS
·
2026
·
IF 17.2
Junbo Tian,Peng Zheng,Shuang Deng,Yongjun Ji,Tengfei Zhang,Zhiyi Sun,Wenxing Chen,Yi-Chi Wang,Lin Gu,Dong Su,Guangwen Xu,Ziyi Zhong,Fabing Su
Understanding reconstructed interfacial sites is crucial for enhancing the catalytic conversion efficiency, as these sites can facilitate reactant adsorption, transformation, and desorption. Herein, we report an unconventional interfacial structure of Pt σ + –O–Ti 4+ –H δ + –oxygen vacancy (OV), in which atomic hydrogen binds to Ti 4+ sites via a charge-compensation mechanism involving subsurface OVs. This restructuring induced by hydrogen creates electron-rich Pt centers and interfacial oxygen, resulting in spatial elongation of the Pt–O and O–Ti bonds. This Pt σ + –O site, stabilized by –Ti 4+ –(H–OV), promotes the activation of CO adsorption/interfacially absorbed oxygen and interfacial lattice oxygen, effectively coupling the Langmuir-Hinshelwood and Mars-van Krevelen pathways. These sites facilitate the rapid CO 2 formation and desorption. Consequently, this system achieves complete CO conversion at 120 °C with an ultralow Pt loading of 0.17 wt% (even in the presence of 0.005% SO 2 and 10% vol H 2 O) and a 59-fold increase in turnover frequency compared to the control sample lacking this interfacial structure.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Qingling Tang,Zhongben Pan,Zixing Xie,Lingbo Cai,Hongwei Chu,Han Pan,Dechun Li
The structure of a new oxygen-rich bismuth oxyselenide, Bi 14 O 24 Se, is resolved. • Bi 14 O 24 Se combines a wide 2.47 eV band gap with unexpectedly strong broadband nonlinear absorption. • Bi 14 O 24 Se enables ultrafast pulses and narrow-linewidth coherent lasing. Bi 2 O 2 Se is a representative bismuth oxyselenide for optoelectronic and photonic applications, but its narrow bandgap and free-carrier background limit stable optical modulation. While defect engineering, doping, and heterostructure construction can improve local properties, they remain constrained by the intrinsic Bi 2 O 2 Se framework. Exploring new Bi-O-Se phases therefore offers a route to reconstruct the crystal framework and band-edge electronic structure. Here, by adjusting the Bi 2 O 3 /Bi 2 Se 3 precursor ratio and conducting the solid-state reaction under a flowing O 2 /Ar atmosphere, we steer the Bi-O-Se system toward an oxygen-rich composition region and identify Bi 14 O 24 Se as a structurally defined oxygen-rich bismuth oxyselenide phase. Electronic-structure calculations reveal a wide bandgap and strong oxygen-state participation at the band edges. Electron localization function analysis further distinguishes the local bonding characteristics, revealing appreciable bond-centered electron localization along the Se O linkages and a more strongly polarized electron distribution across the Bi O interactions. Experimentally, Bi 14 O 24 Se exhibits a distinct optical absorption edge, good thermal stability, and pronounced near-infrared saturable absorption, with modulation depths of 18.3% and 13.5% at 1 and 1.5 μm, respectively, as well as low saturation intensities of 0.52 and 0.16 kW/cm 2 . These results establish Bi 14 O 24 Se as a structurally defined oxygen-rich bismuth oxyselenide and provide a new material basis for understanding how oxygen-rich frameworks reshape the structure-electronic-optical relationship in Bi-O-Se phases. Download: Download high-res image (186KB) Download: Download full-size image
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危险品化学品经营许可证（带存储）