Science China-Chemistry
·
2026
·
IF 9.7
Lv Enmin,Diao Jiefeng,Wang Yilong,Yu Hongtao,Henkelman Graeme,Zhang Hao,Zhang Xuefeng,Dong Xinglong
Developing efficient non-precious oxygen reduction reaction (ORR) catalysts remains a critical challenge. Herein, a direct current (DC) arc plasma strategy was demonstrated to construct nitrogen-doped carbon-coated Ni-ZrC heterostructured nanoparticles ((Ni/ZrC)@NC NPs) with precisely tuned interfacial built-in electric fields (BIEFs). Theoretical studies reveal that the significant work function difference (Δ Φ ) drives an asymmetric charge redistribution at the Ni-ZrC heterointerface, shifting d-band centers to optimize the adsorption energy of oxygen intermediates and to reduce reaction energy barriers. In situ optical emission spectroscopy (OES) captures the dynamic plasma evolution (electron temperature ( T e ) at local thermal equilibrium (LTE): 10,330.9 K), elucidating real-time atomic/ionic flux variations and formation mechanism of the core-shell structure and heterostructure. The synergistic Ni-ZrC core and N-doped carbon shell cooperatively enhance charge transfer kinetics and expose abundant active sites. The resulting catalyst achieves exceptional ORR activity with a half-wave potential ( E 1/2 ) of 0.82 V, surpassing Pt/C (0.80 V), alongside superior methanol tolerance and 4e − selectivity. When deployed in both liquid and all-solid-state flexible zinc-air batteries (FZABs), the catalyst delivers superior metrics: peak power densities of 251.63 mW cm −2 (liquid) and 184.22 mW cm −2 (flexible), and stable operation for a long time. This work establishes a paradigm for manipulating interfacial electronic structures via BIEFs engineering, providing a versatile platform for high-performance energy conversion technologies.
✓ 已验证
产品关联
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2016
·
IF 1.34
Jun LI,Xin YANG,Zhe-an SU,Liang XUE,Ping ZHONG,Shuai-peng LI,Qi-zhong HUANG,Hong-wei LIU
C/C–ZrC–SiC composites with different ZrC–SiC contents were fabricated by precursor infiltration and pyrolysis. The effect of ceramic content on the microstructure and ablation resistance was investigated. Both the C/C–SiC and C/C–ZrC–SiC composites exhibited good ablation resistance under the plasma flame above 2300 °C. With the increase of ZrC content, a continuous oxide layer and a solid Zr–Si–O mesophase were formed during the ablation. And the structure of the formed oxides layer closely linked with the contents of ZrC–SiC ceramics. The solid ZrO 2 –ZrC and Zr–Si–O mesophase could increase the viscosity of SiO 2 moderately and improve the anti-scouring ability. The continuous SiO 2 –ZrO 2 –ZrC–SiC layer would serve as a thermal and oxygen barrier for preventing the substrate from further ablation. The C/C–ZrC–SiC composites with 27.2% ZrC and 7.56% SiC shows superior ablation resistance, and the mass and linear ablation rates are −3.51 mg/s and −1.88 μm/s, respectively.
研究领域:
材料科学
·
陶瓷基复合材料
·
高温材料
·
烧蚀防护
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Rana Mohsin Ali,Jie Wang,Tianhong Zhou,Yue Tian,Muhammad Usman,Hamza Khaliq,Muhammad Adnan,Zunaira Nasir,Ghulam Abbas Ashraf,Yusuke Yamauchi
To enhance the photocatalytic degradation of organic pollutants in peroxymonosulfate (PMS)-based systems, constructing heterojunctions by combining multiple semiconductors has proven more effective than single-component catalysts. In this study, a SnBi@ZrC nanocomposite was synthesized via a hydrothermal method and employed as a visible-light-responsive photocatalyst for PMS activation to degrade Rhodamine B (RhB). Optimal degradation was achieved at neutral pH using 0.45 g L −1 PMS and 0.3 g L −1 SnBi@ZrC, resulting in 98.12 % RhB removal within 20 min, with a reaction rate constant of 0.198 min −1 . Compared to pristine ZrC, the SnBi@ZrC heterojunction exhibited superior photocatalytic activity, attributed to its larger surface area (38.24 m 2 g −1 ), mesoporous structure (12.83 nm), and narrower band gap (1.63 eV), which collectively enhanced light absorption and charge separation. Reactive species quenching experiments confirmed the involvement of SO 4 •− , • OH, O 2 •− , and h + in the degradation process. The SnBi@ZrC catalyst also demonstrated excellent stability and reusability across four successive cycles. Based on experimental results, a possible degradation pathway and mechanism were proposed. These findings suggest that SnBi@ZrC nanocomposites hold significant promise for practical applications in wastewater treatment, particularly for the removal of dye-based and other organic contaminants under visible-light irradiation.
研究领域:
环境科学
·
材料化学
·
光催化
·
水处理技术
·
纳米材料
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Qiang Gao,Cheng Han,Xiaozhou Wang,Yingde Wang
Polymeric precursors with refractory metal in the main chain while still possess meltable/soluble characteristics are highly desired for ultra-high temperature ceramics (UHTCs). Herein, we proposed a stepwise synthesis of polyzirconosilane (PZCS) with Zr-C-Si-N polymeric chain. The reaction mechanism was discussed based on the frontier molecular orbital theory and atom transfer radical polymerization , which was initiated and propagated by a low oxidation state active specie of Cp 2 Zr(II). The PZCS precursor has excellent soluble and meltable properties with a softening point of 80.8 ~ 89.2 o C, which could be spun into green fibers by melt spinning technique. The ceramization process of PZCS was studied, and the resulted SiZrNC multinary ceramics were composed of ZrC/SiC nanocrystals embedded by graphitized carbon phase. The excellent mouldable properties, oxygen-free compositions and high Zr content of PZCS make it an ideal precursor for the preparation of UHTCs matrixes and fibers.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2025
·Vol. 23
·期 1
·e70110
·
IF 2.3
Donglin Lu,Yuqin Shen,Niansheng Huang,Yuzong Gao,Xianle He,Li Wen,Zhe Zhao
The rapid development of the integrated circuit industry has significantly increased the demand for high-performance substrates. Silicon nitride (Si 3 N 4 ) ceramics, recognized for their excellent thermal and mechanical properties, have become a key focus of research. This study first examines the use of ZrC, characterized by low oxygen content and strong oxygen absorption capacity, as a sintering aid to enhance the thermal conductivity of Si 3 N 4 . The effects of ZrC-MgO binary additives and ZrC-Sc 2 O 3 -MgO/MgSiN 2 ternary additives on the density, phase composition, microstructure, thermal conductivity, and mechanical properties of Si 3 N 4 were investigated. Results indicate that in the binary system, ZrC reacted with oxygen on the surface of Si 3 N 4 during sintering, reducing the secondary phase content, and thinning the intergranular phase. This process resulted in abnormal grain growth and improved thermal conductivity (103.73 W·m −1 ·K −1 ) but decreased bending strength (464.33 ± 19.31 MPa). In contrast, the ternary system with Sc 2 O 3 effectively inhibited abnormal grain growth, thereby enhancing mechanical properties. Samples with MgSiN 2 exhibited higher thermal conductivity (90.01 W·m −1 ·K −1 ) but slightly reduced bending strength (646.00 ± 22.93 MPa) compared to those with MgO. These findings offer strategies for optimizing additive systems in Si 3 N 4 ceramics to achieve thinner grain boundaries and a balance between thermal conductivity and mechanical performance.
研究领域:
材料科学
·
陶瓷
·
电子材料
·
热管理
✓ 已验证
产品关联
DOI
高影响因子
Advances in Applied Ceramics
·
2016
·
IF 1.162
Xueyu Tao,Zhimei Xiang,Shixiang Zhou,Yabo Zhu,Wenfeng Qiu
A preceramic polymer for ZrC was successfully synthesised by chemical reaction between zirconium oxychloride (ZrOCl2·8H2O) and 2-Hydroxybenzyl alcohol via a one-pot route. The molecular structure, thermal properties and pyrolysis behaviour of the precursor were investigated. The results indicated that the precursor might be Zr–O–Zr chain polymer with 2-Hydroxybenzyl alcohol as ligand. The precursor was air-stable and exhibited excellent solubility in common organic solvents. The conversions from precursor to ZrC powders were investigated by TG-DTA, X-ray diffraction, Scanning electron microscope, TEM and Raman spectrum. The precursor underwent a thermal decomposition in four steps, and ZrC powders were formed at 1300°C via carbothermal reduction reaction of ZrO2 and carbon in argon with ceramic yield of 63.0%. The ZrC particles were fine and exhibited irregular polyhedron morphology with average size in the range of 100–300 nm.
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2026
·
IF 7.3
Yuzhu Shen,Wei Sun,Yueheng Zhang,Xiang Xiong,Hongbo Zhang,Ziwei Wang
Ultra-high-temperature ceramic-modified C/C composites are vital for hypersonic vehicles, but their repeated service capability is hindered by oxide-scale degradation during cyclic ablation. This study evaluates the reusability of C/C-ZrC-SiC composites via cyclic oxy-acetylene ablation tests. Three Y-modification configurations were investigated: coating-only, matrix-only, and dual-integration. Results indicate that the dual-modified composite exhibited optimal resistance after three 60 s ablation cycles at ∼2600°C, achieving a linear ablation rate of −0.015 μm/s and a mass ablation rate of −0.016 mg/s (a 108% improvement over the reference). Mechanistically, the YSi 2 -modified coating rapidly formed a viscous Y 2 Si 2 O 7 -containing oxide layer during the initial stage to seal surface defects. In subsequent cycles, YF 3 in the matrix continuously replenishes the damaged scale with Y-containing species, promoting the formation of stable Zr 0 . 82 Y 0 . 18 O 1 . 91 and suppressing the martensitic transformation of ZrO 2 . This internal-external synergistic self-healing mechanism substantially enhances the reusability and long-term reliability of aerospace thermal structural components.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 1
·707-715
·
IF 5.532
Shibin Wu,Keru Song,Fengyue Shi,Jianwen Wang,Songyu Hu,Guangdong Zhao
In this study, ZrC–SiC composite ceramics were prepared with varying Zr/Si molar ratios using sol–gel method. Composites were characterized by Fourier-transform infrared spectroscopy (FT–IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), transmission electron microscopy (TEM), scanning electron microscopy (SEM), Raman spectroscopy , and energy-dispersive X-ray spectroscopy (EDS). FT–IR analysis confirmed macromolecular network structure of composites, in which the precursor is composed of polyvinyl butyral (PVB) as main chain, silane molecules are interlinked via –OH moieties in PVB side chains, and Zr atoms are crosslinked with Si in corresponding proportion. Ceramic precursor begins to decompose at a temperature exceeding 1300 °C and is completely transformed into ZrC–SiC composite ceramics with corresponding Zr/Si molar ratio at 1600 °C. Raman spectroscopy and TEM results reveal that after annealing at 1600 °C, ZrC powder uniformly covers surface of SiC ceramics, and high-crystallinity graphite carbon covers ZrC powder.
研究领域:
材料科学
·
陶瓷与复合材料
·
无机化学
·
纳米材料
·
高温材料
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
·
IF 9.879
Yuchen Tong,Zhufeng Hu,Min Wang,Chao Yang,Junbo Xu
In the present study, CF-ZrO 2 /ZrC composites with controllable coating thickness were prepared by an in-situ sol-gel method. Through pretreatment , the carbon fibers surface changed from hydrophobic to hydrophilic and the polar groups on the surface significantly increased, which increased the interface affinity and ensured the stabilities of uniform ZrO 2 /ZrC coatings preparation. The coating layer increases the thickness of the composites, prolonged the mass and heat transfer on the composites surface. The dense ZrO 2 /ZrC coating prevents further oxidation of internal C by oxidative gas. As a result, after 4 cycles sol-gel, the mass ablation rate of the composite is decreased from 0.046 to 0.022 mg s −1 , under the butane flame for 120s. And the thermal decomposition temperatures are 10.8%–15% higher than those of the original carbon fiber. Thus, this in-situ sol-gel method is a feasible for preparing carbon fiber self-reinforced composites with uniform coating and designable structure, which can effectively improve the ablative resistance ability and thermal decomposition temperature of composites.
研究领域:
材料科学
·
陶瓷复合材料
·
抗烧蚀性能
·
溶胶-凝胶工艺
·
表面改性
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2016
·
IF 2.933
Xiaowu Chen,Shaoming Dong,Yanmei Kan,Haijun Zhou,Jianbao Hu,Dengke Wang
Three-dimensional (3D) C f /SiC-ZrC-ZrB 2 composites were successfully fabricated by sol-gel process combined with reactive melt infiltration (RMI) method. With H 3 BO 3 and PVA as raw materials for gel precursor, a porous C-B 4 C matrix was first introduced into the 3D carbon fiber preform by impregnation of the gel precursor, followed by heat-treatments of pyrolysis and carbothermal processes at 1500 °C in Ar atmosphere . Then molten ZrSi 2 alloys were infiltrated into the 3D C f /C-B 4 C preform to obtain 3D C f /SiC-ZrC-ZrB 2 composites. Based on thermodynamic analysis , the formation mechanism of SiC-ZrC-ZrB 2 matrix was revealed. Oxidation resistance and ablation resistance properties of the fabricated 3D C f /SiC-ZrC-ZrB 2 composites were tested using a muffle furnace and a plasma wind tunnel equipment, respectively. The flexural strength of the as prepared composites and its strength retention after oxidation were evaluated. It is revealed that the 3D C f /SiC-ZrC-ZrB 2 composites showed superior flexural strength , good oxidation resistance and excellent anti-ablation properties.
研究领域:
材料科学
·
陶瓷基复合材料
·
高温材料
·
航空航天工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
XianYue Jiang,CaiXia Huo,HongFei Chen,NingKun Liu,KaiJiao Li,JianCheng Wang,Na Zhu,Shuo Yu,AiJun Li,Qixian Zhang,Suxuan Du
Three kinds of spraying powders with different mole ratio: #3 (TaC:ZrC:SiC = 0.6:1.2:3), #2 (TaC:ZrC:SiC = 0.6:1.2:2), #1 (TaC:ZrC:SiC = 0.6:1.2:1) were prepared by spray granulation. TaC-ZrC-SiC (TZS) multicomponent composite coatings were prepared on C/C composites with SiC coating by atmospheric plasma spraying. The ablation behavior and anti-ablation mechanism of TZS multi-component composite coating were investigated by using 4.2 MW/m 2 oxyacetylene flame. After ablation, the TZS coating presents three different ablated morphologies: ablated center region, ablated transition region and ablated edge region. In the ablation edge region, a protective SiO 2 -encapsulated TaC/ZrC core-shell structure formed, while the transition region was dominated by Ta 2 Zr 6 O 17 composite oxide generated through solid-phase reaction between Ta 2 O 5 and ZrO 2 . Notably, the TZS-#3 coating exhibited no peeling in its ablation center, demonstrated the lowest mass ablation rate among the three coatings, and ultimately showed superior ablation resistance.
研究领域:
材料科学
·
陶瓷涂层
·
高温材料
·
烧蚀防护
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2016
·
IF 3.997
Shugang Chen,Yanzi Gou,Hao Wang,Ke Jian,Jun Wang
In order to prepare ZrC-ZrB 2 nanocomposite ceramics with high temperature stability from single-source precursors, the reactions of ZrCl 4 , allyl amine, allyl-MgCl and borane were employed to synthesize suitable precursors. The meliorated ZrNCB precursor had favorable solubility and higher ceramic yield (68.8 wt%), which was then transformed to ZrC-ZrB 2 ceramics at different temperatures. The main phase of the ceramics was amorphous at 1000 °C. As the temperature increased, the amorphous phases started to crystallize, resulting in the appearance of ZrC and ZrB 2 peaks. The content of ZrC and ZrB 2 phases was relatively high in the nanocomposite ceramics at 1600 °C (over 80 wt%). The ZrC-ZrB 2 nanocomposite ceramics showed good high temperature stability up to 2000 °C. Oxidation test indicated that an oxide layer was formed on the ceramic surface at 1700 °C under air to prevent further oxidation of the ceramics. With excellent high temperature and oxidation resistances , the ZrC-ZrB 2 nanocomposite ceramics have potential application for advanced rocket engines and nuclear industry.
研究领域:
材料科学
·
陶瓷
·
高温材料
·
纳米复合材料
·
航空航天工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）