APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Liuxiong Luo,Lin Su,Xuting Niu,Anyu Sun,Ouming Zhang,Tianyang Luan,Xinhui Cao,Shen Gong,Bing Liu
A computed in situ hetero-reaction map was developed to guide Pt-based alloy/carbide heterojunction design. • Semicoherent PtNiFeTi|TiC nano-heterojunctions were constructed on CNTs through microwave synthesis and annealing. • PtNiFeTi|TiC/CNT delivered 249 mV for OER and 25 mV for HER at 10 mA cm −2 in 1 M KOH. • An AEM water electrolyzer achieved 2.12 V at 1 A cm −2 and operated stably for ∼ 500 h. • Interfacial charge redistribution and d-band downshift account for the enhanced bifunctional activity and durability. Scalable green hydrogen production requires electrocatalysts that combine high activity with long-term stability at industrial current densities. Here, a computed in situ hetero-reaction map is proposed for efficient design of Pt-based multicomponent alloy/carbide nano-heterojunctions, built on descriptor-guided alloy screening and JMAK/Arrhenius thermodynamic-kinetic analysis. Guided by the map, strongly coupled PtNiFeTi|TiC/CNT heterojunctions are synthesized. In 1 M KOH at 25 °C, the catalyst delivers η 10 = 249 mV for OER (49.7 mV dec -1 ) and η 10 = 25 mV for HER (35.8 mV dec -1 ). In an anion-exchange membrane electrolyzer (60 °C, 1 M KOH), it achieves 2.12 V at 1 A cm −2 and operates stably for ∼ 500 h with only ∼ 0.26 V increase. Aberration-corrected Semicoherent interface between PtNiFeTi and TiC with an orientation relationship of PtNiFeTi [110] // TiC [110] is observed. DFT attributes the performance to interfacial charge redistribution and a downshifted alloy d-band center (−1.25 to −1.61 eV), optimizing key OER/HER intermediates. Overall, this work provides a practical route for rapid design and scalable fabrication of industrial-grade water-electrolysis catalysts. Data-guided in situ hetero-reaction mapping enables semicoherent PtNiFeTi|TiC nano-heterojunctions for durable AEM water electrolysis. Download: Download high-res image (210KB) Download: Download full-size image
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高影响因子
NANO
·
2026
·
IF 1.3
Kai Su,Hengyuan Liu,Zhengxin Li,Wenfeng Li
TiC nanoparticles were controllably synthesized via a molten salt method, employing Ti powder as the titanium source and high-crystallinity graphite and biomass-derived coconut shell carbon as the carbon source. The influences of the carbon source on the phase evolution, microstructure and oxidation of the products were elucidated using XRD, SEM, EDS and thermogravimetric analysis. The results indicate that coconut shell charcoal exhibits superior reaction kinetics, attributed to the high reactivity of amorphous carbon and the high specific surface area of the porous structure. TiC nucleation initiates as low as 700 ∘ C, and high-purity TiC nanoparticles are obtained at 900 ∘ C, exhibiting a distinctive coral-like wrinkled morphology derived from the biomass template effect. In contrast, the low reactivity of graphite requires a higher temperature to achieve TiC conversion. Coconut shell charcoal-derived TiC displays remarkably higher oxidation onset and peak temperature compared to graphite-derived TiC powder. This study elucidates the influence of carbon source on the structure and oxidation of TiC, providing a technical pathway for fabricating TiC-based functional materials with controllable morphology and superior comprehensive performance.
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高影响因子
CERAMICS INTERNATIONAL
·
2017
·Vol. 44
·期 4
·3596-3605
·
IF 2.986
Zhongren Zhou,Yingjie Zhang,Peng Dong,Yixin Hua,Qibo Zhang,Ding Wang,Jianguo Duan,Zhen Zhang
The molten salt electrolytic method for the preparation of titanium carbide and silicon carbide composites has been subjected to a systematic investigation by experimental analyses and thermodynamic calculations . It has been confirmed that the electrolysis of high titanium slag in the presence of mixed graphite powders generates intermediates CaTiO 3 , Ti 2 O 3 , TiO, Fe 3 Si and objective carbonous products TiC/SiC. It has been furthermore found that the deoxidization process depends critically on a number of process parameters, namely, electrolyte composition, graphitic regime, reaction temperature, cell voltage and reaction time. After careful optimization of these parameters, TiC/SiC nanocomposites with particle sizes of 10–174 nm has been produced by electrolysis of high titanium slag and graphite mixtures in molar ratio of 1:2 referred to Ti:C under 3.2 V at 900 °C for 6 h in 1 mol%CaO-CaCl 2 -NaCl molten salt and with particle sizes of 12 nm~207 nm in 1 mol%CaO-CaCl 2 electrolyte.
研究领域:
材料科学
·
电化学
·
陶瓷与复合材料
·
无机合成
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高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2025
·
IF 7
Chang-Chen Ji,Zhi-Bo Li,Yun-Tao Xi,Zhao-Wen Ren,Ming-Yang Li,Guo-Dong Sun
The grain boundary control is requisite in the development of high-performance molybdenum (Mo) composites in the field of high-temperature applications. Meanwhile, strengthening these Mo-based materials without sacrificing their plasticity has been a huge challenge. In this study, we introduced TiC nanoparticles into the Mo alloy system to break the development bottleneck of the mechanical alloying (MA) approach: a large amount of oxygen impurities and large-size second-phase particles at grain boundaries (GBs). Unlike traditional oxides, TiC could undergo a purification effect to absorb a large number of oxygen impurities to generate in-situ and dispersed Ti 3 O 5 nanoparticles during the high-temperature SPS process. First-principles calculations also elucidated that these semi-coherent Ti 3 O 5 nanoparticles could enhance the interface bonding strength of the Mo GBs on account of the stronger Mo-Ti-O bonds. As a result, the average grain size of Mo-Ti 3 O 5 composite fabricated via spark plasma sintering (SPS) technology at 1200 °C is only 1.3 μm owing to the uniform dispersion of nanoscale second-phase particles. Meanwhile, our prepared ultrafine-grained Mo-Ti 3 O 5 composites possess outstanding mechanical properties, where the compressive yield strength, total strain-to-failure, and hardness of the Mo-Ti 3 O 5 composite are 1340 MPa, greater than 50 %, and 362.8 HV 0.5 , respectively. Our strategy using core-shell composite powder as a raw material provides a novel perspective for the preparation of high-performance refractory metals and has potential to be applied to relevant engineering applications.
研究领域:
材料科学
·
纳米技术
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DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2020
·Vol. 17
·期 4
·1629-1635
·
IF 1.762
Meihua Hu,Ning Bi,Mingming Liu,Shangsheng Li,Taichao Su
TiB 2 –B 4 C composites were in situ synthesized and consolidated by high pressure synthesis method from a mixture of TiC and B powders at the pressure and temperature of 5.0 GPa and 1500℃-1900℃. The phase composition, microstructure, density, hardness, thermal conductivity, and electrical resistivity of TiB 2 –B 4 C composites were analyzed. As the increase in the synthesis temperature, the products were TiB 2 and B 4 C phases and that crystallinity improved. TiB 2 –B 4 C composites were dense without obvious pores. TiB 2 –B 4 C composites synthesized at 1800℃ obtained the optimized performance, including the relative density of 98.2%, the Vickers hardness of 31.7 ± 1.2 GPa with the load of 9.8 N, the thermal conductivity of 30.3 ± 0.7 W/(m K), and the electrical resistivity of 3.3 × 10 −3 Ω cm, respectively. The grain size of the TiB 2 –B 4 C composites changed with the increase in synthesis temperature, leading to the changes in hardness, thermal conductivity, and electrical resistivity.
研究领域:
材料科学
·
陶瓷
·
高压处理
·
复合材料
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DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2012
·Vol. 18
·期 25
·7862-7868
·
IF 5.925
Wei Guo,Yihua Shen,Mingxing Wu,Liang Wang,Linlin Wang,Tingli Ma
Low-cost quantum-dot sensitized solar cells (QDSSCs) were fabricated by using the earth-abundant element SnS quantum dot, novel TiC counter electrodes, and the organic disulfide/thiolate (T 2 /T − ) redox couple, and reached an efficiency of 1.03 %. QDSSCs based on I − /I 3 − , T 2 /T − , and S 2− /S x 2− redox couples were assembled to study the role of the redox couples in the regeneration of sensitizers. Charge-extraction results reveal the reasons for the difference in J SC in three QDSSCs based on I − /I 3 − , T 2 /T − , and S 2− /S x 2− redox couples. The catalytic selectivity of TiC and Pt towards T 2 /T − and I − /I 3 − redox couples was investigated using Tafel polarization and electrochemical impedance analysis. These results indicated that Pt and TiC show a similar catalytic selectivity for I − /I 3 − . However, TiC possesses better catalytic activity for T 2 /T − than for I − /I 3 − . These results indicate the great potential of transition metal carbide materials and organic redox couples used in QDSSCs. Graphical Solar cells : Quantum-dot sensitized solar cells (QDSSCs) were fabricated using counter electrodes based on earth-abundant SnS and TiC and the organic disulfide/thiolate (T 2 /T − ) redox couple (see figure). The loss of photocurrent in QDSSCs based on different redox couples (I − /I 3 − , T 2 /T − , and S 2− /S x 2− ) was ascribed to the inability of the redox couples to regenerate the sensitizer.
研究领域:
材料科学
·
可再生能源
·
光伏技术
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电化学
·
纳米材料
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Qing Xi,Huimin Yan,Fangxia Xie,Rui Li,Jianxin Liu,Caimei Fan,Zhixin Jin,Hongwei Wang
A directional photogenerated electron transfer channel from ZnIn 2 S 4 to Mo 2 TiC 2 -Ru was formed in ZnIn 2 S 4 /Mo 2 TiC 2 -Ru. • The interface electronic delocalization effect between Ru nanoclusters and Mo 2 TiC 2 synergistically optimizes the water dissociation and hydrogen evolution sites. • ZnIn 2 S 4 /Mo 2 TiC 2 -Ru exhibits excellent photocatalytic hydrogen evolution activity under both visible light and natural light conditions. The photocatalytic hydrogen evolution (PHE) rate on ZnIn 2 S 4 is severely limited by the low utilization of photogenerated electrons and the sluggish reaction kinetics. Driving the directional transfer of photogenerated electrons to the target site is crucial for enhancing the electron utilization efficiency and the PHE performance. Herein, this study rationally designed a ternary composite photocatalyst ZnIn 2 S 4 /Mo 2 TiC 2 -Ru C , in which Mo 2 TiC 2 -Ru C serves as an electron acceptor and efficient active site. The in-situ KPFM and Mott-Schottky results indicate that the establishment of interfacial electron transport channel accelerates the transfer of photogenerated electrons from ZnIn 2 S 4 to Mo 2 TiC 2 . Density functional theory (DFT) calculations verify the strong metal-support interaction (EMSI) and interfacial electron delocalization of Mo 2 TiC 2 -Ru C , which synergistically optimize the water dissociation at Ru nanocluster and the hydrogen evolution desorption at the Mo 2 TiC 2 terminal, promoting the efficient utilization of photogenerated electrons. Therefore, ZnIn 2 S 4 /Mo 2 TiC 2 -Ru C achieved a PHE rate of 6.15 mmol·g −1 ·h −1 under visible light, and demonstrated excellent potential for PHE application under natural light. This study provides a new paradigm for integrating electron transfer dynamics with active site engineering to improve the utilization efficiency of photogenerated electrons in the photocatalytic hydrogen evolution process. Download: Download high-res image (350KB) Download: Download full-size image
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2024
·Vol. 53
·期 6
·3167-3177
·
IF 2.2
He Jiangyi,Tu Jianyong,Xu Jianfeng,Chen Xu,Chen Xiang,Wang Dongying
Titanium carbide (TiC) exhibits excellent chemical stability and high electrical conductivity, making it suitable for composites with unique structures and exceptional absorption abilities. In this work, TiO 2 @TiC composites with varied morphology were synthesized by oxidizing TiC at 400°C, for various durations. With the increase of oxidation time, small white TiO 2 particles grew in situ on the surface of TiC particles, ultimately leading to the formation of a continuous structure in which TiO 2 covered the surface of the TiC particles. These results indicate that the impedance matching and electromagnetic wave (EMW) absorption properties of TiO 2 @TiC composites can be modified by adjusting the oxidation time. The minimum reflection loss (RL min ) of the highly oxidized TiO 2 @TiC composite (TO-4 sample) reached −16.2 dB at a thickness of 2.9 mm. When the thickness was increased from 1.2 mm to 4.7 mm, the composites achieved the broadest effective absorption bandwidth of 13 GHz (from 5 to 18 GHz). These enhanced EMW absorption properties can be ascribed to the presence of defects, pores, heterointerfaces, TiO 2 , and TiC within the composites, which induce dipole polarization loss, interface polarization loss, and conduction loss. This practical solution provides a method for preparing TiO 2 @TiC materials with EMW-absorbing properties using oxidation technology.
研究领域:
材料科学
·
电磁学
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DOI
高影响因子
Molecular Medicine Reports
·
2025
·Vol. 32
·期 2
·1-12
·
IF 3.5
Jingru Yu,Jiateng Su,Guo Yu,Zhongyang Zhang,Yue Wu,Gong Xiao,Xin Zhang,Juanjuan Hao
Tic disorder (TD) is a developmental neuropsychiatric disorder that primarily occurs during childhood and impacts the quality of life and psychosocial function of patients. The pathogenesis of TD involves the dysregulation of the cortico‑striato‑thalamo‑cortical (CSTC) circuit and metabolic abnormalities may serve an important role. The aim of the present study was to detect and analyze the metabolic abnormalities in the CSTC circuit in TD, providing a reference value for the study of its pathogenesis. A total of 10 male Wistar rats were randomly divided into the control (CK) group (n=5) and the TD group (n=5). Each rat received a daily intraperitoneal injection of 0.9% saline or 3,3'‑iminodipropionitrile for 7 consecutive days. Tissues were collected from the striatum and cortex, and ultra‑performance liquid chromatography‑tandem mass spectrometry was used to measure metabolite concentrations in the brain tissue samples. Significant differences in the metabolites and metabolic pathways of the CK and TD groups were observed. In the striatum, 13 differentially present metabolites were observed between the CK group and TD group, while 21 differentially present metabolites were identified in the cortex. In the CSTC circuit, the common significantly differentially present metabolites were progesterone, corticosterone, deoxycorticosterone, 11‑dehydrocorticosterone, chenodeoxycholic acid and hyodeoxycholic acid. The common differentially present metabolic pathways were ‘steroid hormone biosynthesis’ and ‘aldosterone synthesis and secretion’. Notably, the abnormality of the ‘tryptophan metabolism’ pathway was only present in the cortex. These results indicated that there were metabolic abnormalities in the CSTC circuit in TD. The most significantly differentially present metabolite was progesterone. ‘Steroid hormone biosynthesis’ and ‘aldosterone synthesis and secretion’ were the significantly altered metabolic pathways in TD.
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DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Yaqi Ren,Jie Dai,Bo Pang,Xiang Liu,Jie Yu
Isotropically conductive TiC/C hybrid nanofibers (TCCNFs) have been prepared by electrospinning for supercapacitor application for the first time. By changing the atmosphere of stabilization process, the TCCNFs with different TiC contents were successfully synthesized with uniform morphology and average diameter of about 100 nm. The TCCNFs stabilized in Ar contain much more TiC than those stabilized in air. The specific capacitance of the TCCNFs stabilized in Ar and air were measured to be 77.8 F g −1 and 130.0 F g −1 at the current density of 0.1 A g −1 , respectively, which were much higher than the pure TiC nanoparticles and reported carbon materials with similar specific surface area. The charge storage mechanisms were discussed by analyzing the capacitive and diffusion-controlled contributions to the total capacitance. Reversible valance change of Ti atoms was observed during charge/discharge process, indicative of the occurrence of pseudoreaction. The experimental results support that the higher specific capacitance of the TCCNFs may be caused by a synergistic enhancing effect between TiC and carbon. The capacitance retention reaches 98.9% and 93.0% for the TCCNFs stabilized in Ar and air after 25 000 cycles, respectively, showing excellent stability. The present work provides a novel conductive electrode material for supercapacitors with possible pseudocapacitance, worthy of further investigation.
研究领域:
材料科学
·
电化学
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高影响因子
Brain Sciences
·
2022
·Vol. 12
·期 7
·880
·
IF 3.333
Qiao-Qiao Qian,Qian-Qian Tan,Dan Sun,Qing Lu,Ying-Ying Xin,Qian Wu,Yong Zhou,Yang-Xi Liu,Pei-Chao Tian,Zhi-Sheng Liu
Background: Tic disorders (TDs), including Tourette syndrome, are childhood-onset neuropsychiatric disorders characterized by motor and/or vocal tics that commonly affect children’s physical and mental health. The pathogenesis of TDs may be related to abnormal neurotransmitters in the cortico-striatal-thalamo-cortical circuitry, especially dopaminergic, glutamatergic, and serotonergic neurotransmitters. The purpose of this study was to preliminarily investigate the differences in the three types of neurotransmitters in plasma and urine between children with TD and healthy children. Methods: We collected 94 samples of plasma and 69 samples of urine from 3–12-year-old Chinese Han children with TD before treatment. The plasma and urine of the same number of healthy Chinese Han children, matched for age and sex, participating in a physical examination, were collected. Ultra-performance liquid chromatography-tandem mass spectrometry was used to detect the three types of neurotransmitters in the above samples. Results: The plasma levels of norepinephrine, glutamic acid, and γ-aminobutyric acid, and the urine levels of normetanephrine and 5-hydroxyindoleacetic acid were higher in the TD children than in healthy children. The area under the curve (AUC) values of the above neurotransmitters in plasma and urine analyzed by receiver operating characteristic curve analysis were all higher than 0.6, with significant differences. Among them, the combined AUC of dopamine, norepinephrine, normetanephrine, glutamic acid, and γ-aminobutyric acid in the 8–12-year-old subgroup was 0.930, and the sensitivity and specificity for TD were 0.821 and 0.974, respectively (p= 0.000). Conclusions: There are differences in plasma and urine neurotransmitters between TD children and healthy children, which lays a foundation for further research on the pathogenesis of TD.Keywords:tic disorders;Tourette syndrome;neurotransmitter
研究领域:
医学
·
神经科学
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DOI
PubMed
高影响因子
MATERIALS CHARACTERIZATION
·
2023
·
IF 4.7
Zhaoxin Zhong,Biao Zhang,Yuhan Ren,Jian Ye,Jiawei Zhang,Feng Ye
In this study, bioinspired web-liked multiphase (TiB + TiC+Ti 3 Si)/TC4 composites were successfully constructed by employing the boron-modified polysilazane polymer as a source of B/C/Si. The bioinspired architecture consisted of long TiB nanowires with ultra-high aspect ratios (up to 48.2) acting as ‘web’, and hybrid spheroidal TiC and rod-like Ti 3 Si particles serving as ‘nodes’. The multiphase reinforcements were grown through the unique SLS (solid-liquid-solid) mechanism based on multiple liquid phases at the core-shell TC4@B m PSZ interface. The enhanced strength of bioinspired web-liked composites was attributed to the synergistic load transfer of hybrid reinforcements. Notably, the flexural strength reached up to 1863 MPa with a high crack-initiation toughness (K Ic ) of 17.8 MPa·m 1/2 . The insights gained from this study provided a promising design approach for developing of high-performance TMCs with high reinforcement content, utilizing polymer instead of traditional ceramic powder.
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高影响因子
危险品化学品经营许可证（带存储）