JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Liang Liu,Baocang Liu,Xuan Xu,Peng Jing,Jun Zhang
The electrochemical oxidation of glycerol is considered as a promising route to generate high value-added products. Rationally tuning the electronic structure of Pt catalysts by supporter and modifier is desirable for promoting the activity and stability of glycerol electrooxidation reaction (GEOR). In this work, we report Pt–Bi hybrid nanoparticles anchored hollow titanium nitride nanowires grew on carbon cloth (Pt 1-x -Bi x /TiN HNWs/CC (0≤ x ≤ 1)) as a self-supported monolithic electrode for efficient GEOR. Contributed by 3D porous nanotube structure, high corrosion resistance and conductivity of TiN, and strong electronic coupling effect of Pt, Bi, and TiN, the optimized Pt 0.95 -Bi 0.05 /TiN HNWs/CC electrode exhibits good catalytic activity and stability for GEOR. It shows a high peak current density of 88.4 mA cm −2 or 306.7 mA mg Pt −1 in 0.05 M glycerol +1.0 M KOH solution. After continuous electrolysis for 8 h in 0.05 M glycerol +1.0 M KOH solution at a constant potential of 0.85 V versus reversible hydrogen electrode (vs. RHE), a high glycerol conversion of 87.0%, a moderate selectivity of 36.6% for glyceric acid , and a good stability were achieved, which is superior to other compared electrodes and most of the reported Pt–Bi catalysts.
研究领域:
电化学
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材料科学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 31
·15175-15184
·
IF 3.925
Hai Wang,Jinxia Huang,Xiaobo Wang,Zhiguang Guo,Weimin Liu
Transition metal nitrides have good metallic conductivity and high pseudocapacitance, which have drawn extensive attention in the research of Zn-ion energy storage systems. In this paper, we present a novel fabrication of carbon cloth-supported TiN-coated carbon nanotube composites (TiN/CNTs@CC and TWC) via a CVD–ALD method using ethanol, TiCl4 and H2O as precursors. The prepared TWC composites can be used as self-supported electrodes with good flexibility and conductivity. Electrochemical performance tests show that the TiN/CNTs@CC electrode has a high specific capacitance of 363.5 F g−1 at 0.5 A g−1, good rate capability and excellent cycling stability with 92.9% capacity retention over 10 000 charge/discharge cycles. Impressively, the assembled zinc ion hybrid capacitor can achieve a high energy density of up to 81.8 W h kg−1 at a power density of 137.7 W kg−1. Even at a power density of 3013.7 W kg−1, a high energy density of 26.4 W h kg−1 is still achieved. This study provides a new insight into the application of nitride-derived carbon materials in zinc-ion hybrid capacitors.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2022
·
IF 4.654
Xiang Li,Yawei Liu,Peng Xu,Xigang Du,Gang Mi,Binglong Mao,Jun Zhang
Titanium dioxide–titanium nitride composite (TiO2–TiN) nanoparticles (NPs) were used as a support to load nickel nano particles for the dehydrogenation of ammonia borane (AB) which is a new method. The composite support was fabricated via a simple ultrasonic mixing route, followed by the in situ loading of Ni NPs using a liquid-phase reduction reaction method where sodium borohydride was adopted as a reducing agent. The synthesized samples were characterized by X-ray diffraction spectra (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Ultra Violet-Visible (UV–vis) analyses. The characterization results show that the Ni NPs uniformly dispersed on the support and existed in both zero and oxidized states. Compared with bare TiO2, Ni loading on TiO2–TiN exhibited a higher catalytic activity toward dehydrogenation of AB both under dark and under sunlight irradiation. Ni/10%TiN–TiO2 showed a hydrogen evolution rate with a turnover frequency (TOF) of 8.01 molH2·min–1·molcat–1 at 25 °C under sunlight. The loading of Ni NPs lowered the band gap energy of TiO2, resulting in the enhanced absorption of sunlight. The addition of TiN that acts as electron scavengers improved the separation efficiency of electron–hole pairs. Titanium dioxide–titanium nitride composites play an important role in improving the catalytic dehydrogenation of AB by nickel-based catalysts.
研究领域:
材料科学
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催化
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能源材料
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纳米技术
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光化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Tete Daniel Koudama,Congxuan Su,Yihe Zhao,Xiaodong Wu,Ke Yuan,Sheng Cui,Xiaodong Shen,Xiangbao Chen
Ceramic aerogels are promising candidates for high-temperature thermal resistance and thermal insulation materials. However, their application can be restricted by their brittleness when exposed to harsh conditions. Herein, this study has developed a novel synthesis process based on a sol-gel method and carbothermal reduction-nitridation to produce a porous TiN composite aerogel from an organic/inorganic hybrid. The resulting TiN displays a polyhedral particle size of around 30–60 nm with nanoscale pores. In addition, the TiN aerogel demonstrates a high BET-specific surface area of 653.42 m 2 /g and a very low thermal conductivity of 0.046 W/(m·K). Furthermore, the TiN aerogel composite displays a good thermal difference with no shrinkage and cracks of the morphology during the butane blazing torch at 1300 °C for 10 min under air environment, demonstrating its excellent thermal insulation property and anti-oxidation characteristics. The gas-solid reaction mechanism of TiN aerogel based on the Gibbs free energy calculations is also proposed.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-14
·
IF 14.7
Zhao Jia,Urrego-Ortiz Ricardo,Liao Nan,Calle-Vallejo Federico,Luo Jingshan
Electrocatalysis holds the key to enhancing the efficiency and cost-effectiveness of water splitting devices, thereby contributing to the advancement of hydrogen as a clean, sustainable energy carrier. This study focuses on the rational design of Ru nanoparticle catalysts supported on TiN (Ru NPs/TiN) for the hydrogen evolution reaction in alkaline conditions. The as designed catalysts exhibit a high mass activity of 20 A mg −1 Ru at an overpotential of 63 mV and long-term stability, surpassing the present benchmarks for commercial electrolyzers. Structural analysis highlights the effective modification of the Ru nanoparticle properties by the TiN substrate, while density functional theory calculations indicate strong adhesion of Ru particles to TiN substrates and advantageous modulation of hydrogen adsorption energies via particle-support interactions. Finally, we assemble an anion exchange membrane electrolyzer using the Ru NPs/TiN as the hydrogen evolution reaction catalyst, which operates at 5 A cm −2 for more than 1000 h with negligible degradation, exceeding the performance requirements for commercial electrolyzers. Our findings contribute to the design of efficient catalysts for water splitting by exploiting particle-support interactions.
研究领域:
材料科学
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电化学
·
能源材料
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催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yu-Xin Liao,Qi-Rui Zhang,Zhi-Lin Zheng,Jing Shao,Liang Ma,Ping-Li Qin,Xiang-Bai Chen
The design of functional materials with efficient light absorption and charge separation is crucial for photocatalytic energy conversion. Herein, a plasmonic TiN/TiO 2 /ReS 2 ternary hybrid is prepared, which exhibits exceptional photocatalytic activity caused by the plasmon-mediated light absorption and multi-interfacial charge separation. The ternary hybrids were synthesized by heating TiN, Re, and S sources at high pressure and temperature. The TiN was partially oxidized to form TiN/TiO 2 hybrids, which were then embedded in ReS 2 nanoflowers through Ti-S bonds, creating a 3D flower-like structure with multiple interfaces. The plasmon resonance of TiN and the bandgap excitations of ReS 2 and TiO 2 endow the hybrids with efficient light absorption in UV–VIS-NIR region. Additionally, the novel embedded structure and the multiple interfaces between TiN, TiO 2 , and ReS 2 facilitate the formation of built-in electric fields and multi-channel charge transfer, which efficiently quicken photoinduced carriers’ migration and hot electron injection. Consequently, the TiN/TiO 2 /ReS 2 hybrids demonstrate a high-efficiency photocatalytic hydrogen generation rate, which is 12.1 times that of commercial P25. Notably, the hybrids also exhibit high photocatalytic activity under near-infrared light irradiation. This study offers innovative insights into the design of photocatalysts and suggests that the prepared materials could be utilized in solar-driven energy conversion applications.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Hongbing Wang,Yifei Yang,Linsen Zhou,Jun Chen,Linan Lin,Xinchun Mao,Wei Cui,Yunxi Yao
The reactive interfacial sites upon supported catalysts provide an alternative pathway to enable the reactants activation in an energetically favorable mode, thus decreasing the energy barrier and promoting the catalytic efficiency. By virtue of structural characterization, in-situ spectroscopic analysis, kinetic assessments and density functional theory (DFT) calculations, supported Pt/TiN catalysts are systematically studied to interrogate H 2 O activation on the Pt-TiN interfacial sites and its catalytic function during the low-temperature water gas shift (WGS). It is found that the partially oxygen-covered TiN surface is highly efficient for H 2 O activation by oxygen-assisted dissociation with an energy barrier of 0.41 eV, much less than that on metallic Pt surface. The formed hydroxyls binding on Ti sites, observed by in-situ X-ray photoelectron spectroscopy (XPS) and temperature programmed desorption (TPD), could readily react with the adjacent CO adsorbed on Pt clusters with the reaction energy barrier of 0.43 eV to attain the individual catalytic cycle. Benefiting from the enhanced H 2 O activation, the catalytic turnover rate of CO-H 2 O reaction on Pt/TiN is 3.8 and 20.3 times higher than that on traditional Pt/TiO 2 and Pt/SiO 2 at 403 K, respectively. The interfacial reactive sites are the origin of low-temperature WGS on Pt/TiN catalysts.
研究领域:
催化
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材料科学
·
化学工程
·
表面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2018
·Vol. 28
·期 1
·423-430
·
IF 1.34
Wang Bin,Du Jinjing,Gao Shoukun,Fang Zhao,Zhu Jun,Li Linbo
NiFe 2 O 4 /nano-TiN ceramics were fabricated by a two-step cold-pressing sintering process. Effect of sintering atmosphere (air, nitrogen, argon) on the synthesis process of NiFe 2 O 4 /nano-TiN ceramics was investigated. The DSC-TG and XRD analysis results indicated that besides principal phases of NiO and NiFe 2 O 4 , new-phase Ni 3 TiO 5 formed in the sintered ceramics under the three sintering atmospheres, and metallic phase including iron and nickel appeared in the sintered samples with inert gas (nitrogen, argon) sintering condition. Microstructure analysis results showed that considerable quantity of micropores appeared in the ceramic samples sintered under inert gases (argon, nitrogen), but lower porosity (3.0, 3.6%) and higher densities (4.78 g/cm 3 , 4.51 g/cm 3 ) can be obtained, comparing to the both values (14.4%, 4.17 g/cm 3 ) for the ceramic samples sintered under air atmosphere. Besides, the average bending strength and elastic modulus of the samples sintered under argon is 113.75 MPa and 7.13GPa, which is higher than that of 75.12 MPa, 5.42GPa and 91.96 MPa, 6.26GPa for the samples synthesized under air and nitrogen, separately. When changing sintering atmosphere from air to inert gases (argon, nitrogen), the fracture model of the 4 wt.%nano-TiN/NiFe 2 O 4 ceramics synthesized at 1400 °C for 4 h transformed from intergranular fracture to intergranular-transgranular fracture.
研究领域:
材料科学
·
陶瓷工程
·
固态化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Longhua Sun,Xiaodong Meng,Jie Zhang,Yongqiang Meng,Manyun Wang,Xueqin Zhou,Chao Chen,Ji Zhou,Christopher W. Bielawski,Jianxin Geng
The hybridization of carbon materials with metal compounds is a promising approach for designing advanced composites. However, the standard methodologies are often limited in practical terms by the complicated synthetic routes and/or an inability to control the structures of the resulting materials. Herein, we describe a one-pot strategy for synthesizing a N-doped porous graphitic carbon that is hybridized with oxygen-doped titanium nitride (designated O–TiN@N-PGC) and show that the composite displays outstanding chemisorption and electrocatalytic effects in sulfur cathodes. The method employs urea as nitrogen source and thus avoids the use of dangerous and toxic ammonia gas. The unique structure of O–TiN promotes the electrocatalytic conversion of sulfur species found in sulfur cathodes. Li–S cells that are prepared using the O–TiN@N-PGC as a sulfur host exhibit remarkable performance in terms of specific capacity (1408 mA h g −1 at 0.1 C), rate capacity (604 mA h g −1 at 4 C), and cycling stability (513 mA h g −1 after 1000 cycles at 0.5 C). Moreover, an areal capacity of 7.6 mA h cm −2 is achieved under a high sulfur loading of 5.7 mg cm −2 . The results establish a facile and efficient strategy for integrating metal nitrides in porous carbons , particularly for use in contemporary energy technologies.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Jinghui Zhu,Caiming Jiao,Tuo Kang,Liubiao Zhong,Sanfei Zhao,Yejun Qiu
Aiming to commercialize Li S battery, it is very important to achieve high sulfur loading alongside superior electrochemical performance. In this work, a novel composite material with sandwich structure constructed by titanium nitride nanoparticles and boron nitride‑carbon nanofibers (BNC-TiN-BNC), has been successfully prepared through electrospinning and spraying method, and applied as the interlayer in Li S batteries. Compared with the BNCNF interlayer, the sandwich-like BNC-TiN-BNC interlayer shows more excellent chemical adsorption for soluble lithium polysulfides (LiPSs) via the polar effects of the Ti S and S N bonds, and furthermore, the uniform distribution of TiN nanoparticles , filling in the pores between the nanofibers as packing layer of the BNC-TiN-BNC interlayer, can retard the migration of LiPSs more effectively by physical barriers. By introducing the BNC-TiN-BNC interlayer, the electron transfer , capacity and cycling life of Li S batteries have been improved significantly, especially at high current density . With the sulfur loading of 2.5 mg cm −2 , the cell with BNC-TiN-BNC interlayer delivers a high initial discharge capacity of 642.3 mA h g −1 at high current density of 2.0C, and the capacity remains 594 mA h g −1 with only the decay rate of 0.025% over 300 cycles.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Dinghao Sun,Rong Du,Jin Zhang,Heng Zhang,Yi Li,Hang Xiao,Haibo Wang,Qingzhu Sun,Zhiyuan Ma
Improving the dispersion and compatibility of fillers in epoxy resin (EP) is crucial for enhancing the thermal stability, mechanical properties, and tribological performance of coatings. This study presents a novel biomimetic modification strategy. MoS2–TiN hybrid fillers are uniformly dispersed in the EP matrix and strongly bonded through comodification with polydopamine (PDA) and γ-aminopropyltriethoxysilane (KH550). The successful synthesis of MoS2–TiN@(PDA+KH550) fillers is confirmed by using Fourier transform infrared spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Scanning electron microscopy, transmission electron microscopy, and dispersion tests show that the aggregation of MoS2 and TiN is alleviated. Compared to pure EP, the PDA@MoS2–KH550@TiN (2:1)/EP (PMT2@EP) coating shows significant improvements in several aspects. In terms of thermal stability, the residual carbon rate at 800 °C increased from 9.38 to 11.98%. For mechanical properties, the storage modulus increased by 7.2%, the glass transition temperature (Tg) increased by 24.6%, the tensile strength increased by 42.1%, the tensile modulus increased by 60.9%, the hardness increased by 58.3%, and the flexural strength increased by 59.1%. Additionally, the coating exhibits enhanced tribological performance, with a reduction in the friction coefficient of 81.8% (from 0.555 to 0.101) and a decrease in the wear rate of 77.8% (from 11.64 × 10–5 mm3/(N m) to 2.58 × 10–5 mm3/(N m)). This biomimetic interface design provides important experimental and technical support for developing high-performance, wear-resistant, low-friction EP coatings.
研究领域:
材料科学
·
聚合物复合材料
·
摩擦学
·
表面工程
·
纳米材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Physics
·
2022
·
IF 11.021
Hua He,Wei Huang,Zhiguang Guo
Facing the problems of fossil energy shortage and solid surface icing, the use of solar energy to remove surface ice accumulation is a promising solution. Here, we propose a superhydrophobic coating with a photothermal effect for anti-icing and de-icing and defrosting performance. We designed the coating using a simple secondary spray method. That is, a bonding substrate (epoxy resin) is first constructed on the glass substrate , then a protective layer (polydimethylsiloxane(PDMS)) mixed with SiC/TiN composite particles is sprayed onto the epoxy resin surface, and finally dried to obtain a photothermal superhydrophobic coating. In this design, the coating shows (I) excellent superhydrophobicity (water contact angle = 155°, sliding angle = 4°), (II) excellent photothermal effect (the surface temperature of obtain coating rapidly rose to 111.8 °C under 1 sun), and (III) good chemical and mechanical stability. As a result, the coating shows excellent anti-icing, de-icing, and defrosting properties. For example, the coating can significantly extend the icing time. In the face of surface frozen water droplets, frost layers, and large areas of ice cover, the coating can rapidly photothermally remove surface ice layers under 40 mW cm −2 light irradiation. As a result, the coating is simple to prepare and has excellent superhydrophobic, photothermal anti-icing/de-icing, and defrosting properties. The study is of great significance for multifunctional applications.
研究领域:
材料科学
·
能源工程
·
表面工程
·
环境科学
✓ 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）