CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Mengjie Pan,Huachen Lin,Lin Sun,Yulong Ying,Hong Jia,Yu Liu
Research into electrode materials that are low-cost, possess high capacity, and exhibit long cycle life is pivotal for the advancement of supercapacitor technology. Herein, a CoP/P-C/MnO 2 @CC composite is synthesized by solution impregnation and high temperature phosphating. The unique combination of nanotubes and MnO 2 nanosheets reduces ion and electron transmission distance and significantly increases active sites. The CoP/P-C/MnO 2 @CC electrode demonstrates a specific capacitance of 742.0 F g −1 at 1 A g −1 , a substantial improvement over the counterpart prior to KMnO 4 immersion (459.4 F g −1 ). Furthermore, an asymmetric supercapacitor based on the CoP/P-C/MnO 2 @CC electrode was assembled, achieving a high energy density of 93.12 Wh kg −1 at a power density of 800 W kg −1 . Meanwhile, the device maintains 77.3 % of its original capacity after 8000 cycles, demonstrating good cycle stability. This study not only presents an attractive electrode material with unique structure, but also provides a referential methodology for developing superior electrodes.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 16
·6849-6860
·
IF 3.5
Li Xue,Liu Chenxi,Xu Anding,Wu Songping,Wang Liming
Silicon serves as a widely employed anode material in lithium-ion batteries (LIBs). However, its practical application faces significant challenges due to substantial volume expansion during lithiation and inadequate electrical conductivity, limiting its use in high-energy–density LIBs. In addressing these challenges, this study places a strong emphasis on developing a mass-producible method for fabricating high-strength nano-porous Si@C composites. This material shows great promise as an anode material for lithium-ion batteries, offering multi-stage stability. The research focuses on modifying commercial silicon powders, followed by a straightforward and large-scale multi-stage stabilization synthesis process, ultimately leading to the successful synthesis of robust nano-porous Si@C composites. Notably, these nano-porous Si@C composites demonstrate outstanding electrochemical performance, with a high discharging capacity of 3001.5 mAh g –1 at 0.2 A g –1 and 1407.9 mAh g –1 after 1000 cycles at 2 A g –1 . They exhibit an impressive rate capability of 856.4 mAh g –1 at 10 A g –1 , exhibiting an initial Coulombic efficiency of 82.5%. Overall, this systematic approach offers a promising advancement in developing high-performance Si-based anode materials for next-generation LIBs, with improved energy density and cycling stability.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2024
·
IF 3.2
Yuning Wang,Yang Chen,Yongjian Xu,Yatao Yan,Ming Chen,Mengting Shao,Qianhui Wu,Fang Guo,Jianhua Hou
The development of cheap, efficient and stable hydrogen-producing catalysts is the current research focus, especially the catalysts that can work stably in the whole pH range. In this work, a myrica rubra-like structure of P–Co 1-x S/C was synthesized by hydrothermal reaction, sulfurization and phosphorization using spherical flower-like cobalt glycerate (CoG) as precursor. The design of this multilevel structure of P–Co 1-x S/C effectively increases the specific surface area. The doping phosphorus and the protection of carbon layer greatly improve catalytic performance and enhance the stability of Co 1-x S in the hydrogen evolution reaction (HER) at full pH range. When the current density is 10 mA cm −2 , the HER overpotentials of P–Co 1-x S/C in acidic, alkaline and neutral solutions are 86, 93 and 167 mV, and respectively. The Tafel slopes of P–Co 1-x S/C in acidic, alkaline and neutral solutions are 82, 100 and 103 mV dec −1 , respectively. In addition, the electrocatalyst also displays excellent electrochemical long-term stability. After 2000 cycles or 20 h long-term testing, its catalytic activity remains stable without obvious decrease at full pH range.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lipeng Wu,Xiaomin Wang,Pengwei Zhao,Yongsheng Ji,Bin Li,Yongsheng Xu,Tao Liao,Qing Xia,Yang Li,Xiaobin Fan,Wenchao Peng
Atomic Zn-N-C materials are synthesized by direct carbonization of ZIF-8, which maintains the rhombic dodecahedron morphology (RDM) with abundant nanopores. Zn-N-C-RDM shows enhanced catalytic activity with bisphenol A (BPA) as model pollutant and peroxydisulfate (PDS) as oxidant. Molecular dynamic (MD) calculations show that mean square displacement (MSD) of PDS, BPA, and H 2 O molecules in the nanotunnels decreases obviously with smaller pore size. Due to the confinement, the BPA ( d i = 1.0 nm) and PDS ( d i = 0.5 nm) can easily enter and confined in the cavities of Zn-N-C-RDM. PDS can be therefore activated more easily to degrade BPA due to their faster diffusion and shorter transfer routes. > 97 % degradation of BPA can therefore be achieved by Zn-N-C-RDM within 20 min. Quenching experiments, electron paramagnetic resonance (EPR) and open circuit potential (OCP) results indicate that O 2 •− radical dominate the degradation. According to the density functional theory (DFT) results, the binding sites of Zn-pyridinic N are the main active sites. This work provides new insights for improving activity in Fenton-like reactions in the field of environmental remediation.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Neurogastroenterology and Motility
·
2017
·
IF 2.457
Meng Li,Lu Xue,Hong-Yan Zhu,Hongjun Wang,Xue Xu,Ping-An Zhang,Geping Wu,Guang-Yin Xu
Background/Aims Gastric hypersensitivity contributes to abdominal pain in patients with functional dyspepsia. Recent studies showed that hormones induced by stress are correlated with visceral hypersensitivity. However, the precise mechanisms underlying gastric hypersensitivity remain largely unknown. The aim of the present study was designed to investigate the roles of corticosterone (CORT) on excitability of dorsal root ganglion (DRG) neurons innervating the stomach. Methods DRG neurons innervating the stomach were labeled by DiI injection into the stomach wall. Patch clamp recordings were employed to examine neural excitability and voltage-gated sodium channel currents. Electromyograph technique was used to determine the responses of neck muscles to gastric distension. Results Incubation of acutely isolated DRG neurons with CORT significantly depolarized action potential threshold and enhanced the number of action potentials induced by current stimulation of the neuron. Under voltage-clamp mode, incubation of CORT enhanced voltage-gated sodium current density of the recorded neurons. Pre-incubation of GF109203X, an inhibitor of protein kinase C, blocked the CORT-induced hyperexcitability and potentiation of sodium currents. However, pre-incubation of H-89, an inhibitor of protein kinase A, did not alter the sodium current density. More importantly, intraperitoneal injection of CORT produced gastric hypersensitivity of healthy rats, which was blocked by pre-administration of GF109203X but not H-89. Conclusions Our data strongly suggest that CORT rapidly enhanced neuronal excitability and sodium channel functions, which is most likely mediated by protein kinase C but not protein kinase A signaling pathway in DRG neurons innervating the stomach, thus underlying the gastric hypersensitivity induced by CORT injection.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Yue Han,Xuehui Tang,Xiangyu Wu,Hongyi Shi,Lei Huang,Lei Wei,Mingmin Li,Yue Zhang
l -Cysteine ( l -Cys) is a significant biomarker for various diseases, including liver disease, skin disorders, and Parkinson’s disease, making its detection crucial for diagnostic purposes. In this study, we present a novel colorimetric sensing platform for l -Cys detection. Using ZIF-8 as a precursor, a cobalt-based single-atom catalyst (Co-N-C) was synthesized through pyrolysis, adsorption, and activation processes. The resulting Co-N-C catalyst exhibited remarkable oxidase-like (OXD-like) activity, effectively facilitating the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to form oxTMB, which resulted in a distinct blue color. However, due to its strong reducibility, l -Cys can scavenge reactive oxygen species (ROS) generated by the Co-N-C catalyst, thus inhibiting the oxidation of TMB. By monitoring the color change in the solution, we developed a highly sensitive colorimetric assay for l -Cys detection. The assay demonstrates excellent selectivity and has a detection limit of 0.1 µM, with a linear detection range from 0.1 to 10 µM. This work offers an efficient approach for detecting l -Cys and establishes a new framework for designing high-performance nanozymes.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Cell Reports
·
2024
·
IF 7.5
Chenyin Wang,Meigui Yang,Dongyao Liu,Chaogu Zheng
Summary Microbial metabolites that can modulate neurodegeneration are promising therapeutic targets. Here, we found that the short-chain fatty acid propionate protects against α-synuclein-induced neuronal death and locomotion defects in a Caenorhabditis elegans model of Parkinson’s disease (PD) through bidirectional regulation between the intestine and neurons. Both depletion of dietary vitamin B 12 , which induces propionate breakdown, and propionate supplementation suppress neurodegeneration and reverse PD-associated transcriptomic aberrations. Neuronal α-synuclein aggregation induces intestinal mitochondrial unfolded protein response (mitoUPR), which leads to reduced propionate levels that trigger transcriptional reprogramming in the intestine and cause defects in energy production. Weakened intestinal metabolism exacerbates neurodegeneration through interorgan signaling. Genetically enhancing propionate production or overexpressing metabolic regulators downstream of propionate in the intestine rescues neurodegeneration, which then relieves mitoUPR. Importantly, propionate supplementation suppresses neurodegeneration without reducing α-synuclein aggregation, demonstrating metabolic rescue of neuronal proteotoxicity downstream of protein aggregates. Our study highlights the involvement of small metabolites in the gut-brain interaction in neurodegenerative diseases.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xueai Li,Kexin Jin,Xiangyan Qu,Yuning Shi,Chunsheng Wang,Wanchun Guo,Kesong Tian,Yahui Wang,Haiyan Wang
The dispersion of diverse magnetic metallic in a single particle plays an important role in microwave absorption; however, its contribution is not clear due to the challenge of controllable synthesis of magnetic bimetallic nanoparticles in one micro/nanostructure. Herein, a series of magnetic bimetallic nanoparticles separately confined growth in a hollow multi-shell microsphere with proper impedance matching characteristic were prepared, which can be used as theoretical models to elucidate magnetic coupling effect between diverse magnetic metallic nanoparticles in a single particle on electromagnetic attenuation. The coupling effect of magnetic Co and Fe nanoparticles dispersed in different shell effectively enhance the microwave absorption performance of void@Fe@SiO 2 /Co/C particles with minimum reflection loss (RL min ) of −62.3 dB (RL=-20 dB, 99 % absorption) at a thickness of 2.05 mm, provoking the maximum radar cross-section (RCS) reduction value of perfect electric conductor (PEC) 37.37 dBm 2 . Meanwhile, broad effective bandwidth (EBW, RL≤-10 dB, ≥90 % absorption) response of 7.04 GHz at a thickness of 2.44 mm was achieved. These findings can provide guidance for the designation of novel magnetic broadband microwave absorbing materials (MAMs).
✓ 已验证
产品关联
DOI
高影响因子
iScience
·
2024
·
IF 4.6
Chenliang Zhou,Shaoyuan Shi,Xingyu Zhang,Yuting Sun,Guan Peng,Wenjing Yuan
Constructing platinum-like materials with excellent catalytic activity and low cost has great significance for hydrogen evolution reaction (HER) during electrolysis of water. Herein, palladium nanoparticles (NPs) deposition on the surface of Co NPs using nitrogen-doped carbon (NC) as substrate, denoted as N-ZIFC/CoPd-30, are manufactured and served as HER electrocatalysts. Characterization results and density functional theory calculations validate that Pd-Co heterojunctions with NC acting as “electron donators” promote the Pd species transiting to the electron-rich state based on an efficient electron transfer mechanism, namely the N-C polar bonds induced strong metal-support interaction effect. The electron-rich Pd sites are beneficial to HER. Satisfactorily, N-ZIFC/CoPd-30 have only low overpotentials of 16, 162, and 13 mV@-10 mA cm −2 with the small Tafel slopes of 98 mV/decade, 126 mV/decade, and 72 mV/decade in pH of 13, 7, and 0, respectively. The success in fabricating N-ZIFC/CoPd opens a promising path to constructing other platinum-like electrocatalysts with high HER activity.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Zhouxi Tan,Mingkang Zhang,Shuai Zhao,Yihua Huang,Zhengren Huang
Low strength and poor performance of SiC–WC composite for seals, attributable to the use of a large amount of liquid phase sintering additives, limit the application prospects of these materials. This study focuses on preparing high-strength, high-toughness, and wear-resistant SiC–WC composite using a small amount of aluminum and carbon black as sintering additives. The results revealed that the specimen containing 50 wt% WC exhibited the maximum flexural strength and fracture toughness of 645.9 MPa and 7.49 Mpa m 1/2 , respectively. These improvements were attributed to the deoxidizing and solid-solution effects of Al and the reinforcing effect of the WC second phase. Moreover, the specific wear rate was measured at 8.06 × 10 −7 mm 3 N −1 m −1 , which was 56.9 % lower than that of monolithic SiC. Results from Raman spectral analysis provided evidence of the presence of W–O bonds on the wear surface, indicating that the SiO 2 film could be successfully replaced by a WO 3 film.
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Xinkang Peng,Xulong Song,Wei Cao,Zhenchen Tang,Tingting Wang,Yunxia Wen,Zhinan Wu,Tong Zhou,Han Lin,Xiaohua Lu,Tuo Ji,Jiahua Zhu
2,5-Furandicarboxylic acid (FDCA), an important platform chemical, is often synthesized from hydroxymethylfurfural (HMF), while the energy efficiency of the reaction is limited by the slow hydroxymethyl oxidation, resulting in poor technoeconomy. In this study, a bimetallic Au–Pd microwave-responsive catalyst was designed to achieve high-efficiency synthesis of FDCA by coupling microwave-activated peroxyl radical formation from hydrogen peroxide (H2O2). Pd sites were responsible for dissociating H2O2 into peroxyl radicals (·OOH), and Au sites accepted peroxyl radicals and oxidized HMF into FDCA. The microwave-boosted reaction synergy on the bimetallic Au–Pd dual active centers enabled the reaction to occur at near-room temperature (45 °C) and reached the highest FDCA yield of 88 mol % at 65 °C. Experimental and electric-field DFT studies revealed that microwaves increased the rate constant of H2O2 decomposition by 1.6-fold compared to conventional heating methods, with an ultrahigh H2O2 utilization rate of 90%. This work provides a new platform for highly efficient peroxyl radical formation with microwave energy, which can be extended to a wider range of oxidation reactions with accelerated reaction kinetics and enhanced energy efficiency.
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2024
·Vol. 14
·期 9
·1082
·
IF 2.9
Qingpeng Li,Jiaxing Liu,Tiancheng Jiang,Xiaoyun An,Na Wang,Zhixiu Xu,Wanyuan Guo,Liang Zhang,Xiaofeng Liu
To improve the storage stability and conductivity of aluminum powder in an aqueous environment, the surface of aluminum powder was treated to form silica film by the sol–gel method, then was treated with conductive modification to introduce nanocarbon black particles so that conductive aluminum powder could be prepared to solve the application bottleneck of aluminum powder in water-borne heavy-duty anticorrosive coatings. The structure, surface morphology, and composition of the modified aluminum powder were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray photoelectron spectroscopy (XPS), and X-ray powder diffraction (XRD). The corrosion resistance and electrochemical properties were measured using a hydrogen evolution test and an 2electrochemical test. The results showed that there was a compact SiO2film formed on the surface of the prepared conductive aluminum powder, and the conductive filler nanocarbon black was uniformly grafted on the surface. According to the hydrogen evolution test at 100 h/50 °C, conductive aluminum powder with 5 wt% carbon black exhibited the best hydrogen evolution effect, with a hydrogen evolution amount of only 0.5 mL. The prepared conductive aluminum powder was applied to the water-borne coatings, and the storage stability test, electrochemical polarization test, and neutral salt spray test were further conducted. The water-borne coatings prepared with conductive aluminum powder still showed good performance and had no reaction after 6 months of storage. Compared with the coating containing SiO2-modified aluminum powder, the coating exhibited better corrosion resistance.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）