INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Ke Wang,Fei-teng Zhao,Sen-miao Zhao,Qi-yue Wang,Xiao-dan Mei,Jing-lan Huang,Hai-zhen Liu,Cun-ke Huang,Jin Guo
Developing efficient hydrogen storage technologies remains a critical challenge for advancing clean hydrogen energy applications. This study addresses the challenges of high dehydrogenation temperature and sluggish dehydrogenation kinetics in NaAlH 4 through the development of TiVC MXene-enhanced composite systems . In this paper, TiVC MXene was prepared by etching TiVAlC with HCl/LiF, and TiVC/NaAlH 4 composite systems were made via milling. The unit cell of NaAlH 4 expanded during milling due to M (M = Ti, V) point defects . The optimal 8 wt% TiVC-doped sample demonstrated remarkable performance: onset dehydrogenation temperature reduced to 90 °C and activation energy decreased by 41% in the 2 nd dehydrogenation step. Notably, the dehydrogenated product achieved 4.1 wt% hydrogenation capacity within 30 min at 120 °C. Structural and mechanistic analyses showed that TiVC decomposed, and its reaction products, such as M defects, Ti–Al alloy and Ti/V oxides , were the real catalysts. They enhanced NaAlH 4 's hydrogen-storage performance by offering active H and smaller Al particles . This work demonstrates the potential of MXene-derived multiphase catalysts for metal hydride storage systems.
研究领域:
材料科学
·
氢能存储
·
纳米材料
·
催化
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Haifeng Yao,Changbo Jia,Yongping Dong
Herein, a novel sandwich electrochemiluminescence (ECL) aptasensor was developed based on the resonance energy transfer (RET) with iridium complex doped silicate nanoparticles (SiO 2 @Ir) as energy donor and gold nanoparticles modified TiVC MXene (AuNPs@TiVC) as energy acceptor. Strong anodic ECL signal of SiO 2 @Ir was obtained through both co-reactant pathway and annihilation pathway. Electrochemical results showed that SiO 2 @Ir has good electron transfer rate and large specific surface area to immobilize more aptamers. AuNPs@TiVC apparently quenched the ECL signal of SiO 2 @Ir due to the ECL resonance energy transfer between them. In the presence of kanamycin (KAN), a sandwich type sensor was formed with the aptamer probes as connecters between the donor and the acceptor, resulting in the decrease of ECL intensity. Under the optimal condition, KAN could be sensitively detected in the range of 0.1 pg/mL to 10 ng/mL with a low detection limit of 24.5 fg/mL. The proposed ECL system exhibited satisfactory analytical performance, which can realize the detection of various biological molecules by adopting suitable aptamer.
研究领域:
分析化学
·
生物传感
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Magnesium and Alloys
·
2025
·
IF 13.8
Shixuan He,Dongdong Li,Xingqing Duan,Jinting Chen,Bogu Liu,Yawei Li,Haixiang Huang,Haoyuan Zheng,XinHua Wang,Ying Wu
Catalysis is an effective means to improve the slow kinetics of hydrogen absorption and desorption, as well as the poor cycle life of the 2LiBH 4 +MgH 2 composite system. In this study, The TiVC MXene was obtained by etching TiVAlC and introduced into 2LiH + MgB 2 by ball milling. Products obtained were heated and hydrogenated to prepare the 2LiBH 4 + MgH 2 (LMBH) system, which exhibits distinguished kinetic performance and capacity retention rate. In the LMBH + 6 wt% TiVC, a 9.3 wt% hydrogen is released within 35 min at 400 °C as well as hydrogenation is completed within 30 min at 350 °C, 9 MPa. Moreover, the capacity retention rate was up to 96 % after the 15 th cycle. During the heating and hydrogenation process, the TiH and V 8 C 7 are generated in-situ as active products, and stably exist in the subsequent process to catalyze the hydrogen absorption-desorption reactions of the composite. The presence of TiH/LiH/V 8 C 7 /MgB 2 interface improves the kinetic performance of the system. Reversibility is improved by inhibiting the generation of polyborane and the aggregation during the hydrogen absorption-desorption process. The interface structure-activity relationship is first elucidated that between bimetallic MXene and 2LiBH 4 + MgH 2 composite system during hydrogen absorption-desorption processes, providing a novel viewpoint and optimization path for the modification research of 2LiBH 4 + MgH 2 composites.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Fuge Chai,Jing Wang,Siyi Sun,Yongping Dong,Mingfu Ye
Cathodic ECL of TiO 2 was greatly enhanced by carboxylated MWCNTs. • TiVC MXene QDs were loaded onto MOF to form stable nanocomposite. • TiVC/MOF nanocomposite exhibited inhibiting effect on the cathodic ECL of TiO 2 . • An ECL sensor for chloramphenicol was fabricated based on its inhibiting effect. In this study, TiO 2 nanoparticles were employed as novel luminophore to obtain cathodic electrochemiluminescence (ECL) signal in the presence of K 2 S 2 O 8 under neutral aqueous condition. Carboxylated multi-walled carbon nanotubes (f-MWCNTs) served as co-reactant accelerators to facilitate the reduction of K 2 S 2 O 8 , resulting in greatly enhanced cathodic ECL signal. TiVC MXene quantum dots (TiVC QDs) were loaded onto MOF to form stable nanocomposite (TiVC/MOF) which could effectively suppress the cathodic ECL emission by blocking interfacial electron transfer and consuming SO 4 •− via chemical reaction. Based on the inhibiting effect of TiVC/MOF nanocomposite, an “off-on” mode ECL sensor was fabricated for the sensitive detection of chloramphenicol (CAP). Under the optimal condition, the proposed sensor exhibited a linear range of 0.1 μM-6 μM with a detection limit of 3.62 nM. Moreover, the ECL sensor showed satisfactory analytical performance in real samples, offering a reliable strategy for the sensitive detection of CAP. Carboxylated multi-walled carbon nanotubes (f-MWCNTs) could act as co-reactant accelerators to greatly enhance the cathodic ECL of TiO 2 nanoparticles. TiVC MXene QDs were loaded onto MOF to form stable nanocomposite (TiVC/MOF) which could effectively suppress the cathodic ECL emission. Based on the inhibiting effect of TiVC/MOF nanocomposite, an “off-on” mode ECL sensor was fabricated for the sensitive detection of chloramphenicol (CAP). The ECL sensor showed satisfactory analytical performance in real samples, offering a reliable strategy for the sensitive detection of CAP. Download: Download high-res image (178KB) Download: Download full-size image
✓ 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）