SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Shiteng Long,Yang Qin,Huafeng Fu,Jia Hu,Hansong Xue,Yu'an Chen,Fusheng Pan
Developing medium temperature hydrogen storage materials is important for the practical application of the Studies have demonstrated that V-based catalysts exhibit exceptional catalytic activity in the dehydrogenation of MgH 2 at medium levels. However, the V-base catalysts primarily concentrates on hydrogen desorption, and there is a necessity for further enhancement of hydrogen absorption properties. To solve this problem, herein we prepared a bimetallic oxide. Co can enhance the hydrogen absorption and desorption properties of MgH 2 as the catalyst and it influences the performance of hydrogen absorption more obviously than the hydrogen desorption performance. It is found that MgH 2 catalyzed by Co 3 V 2 O 8 can absorb 1.31 wt% hydrogen within 30 min even under room temperature and can release 3.41 wt% hydrogen within 120 min at temperatures as low as 225 °C. The activation energy of MgH 2 -6 wt.%Co 3 V 2 O 8 is determined to 68.5 kJ/mol, which is 50.2 % lower than that of Ball-MgH 2 . XRD combined with TEM measurements revealed that the in-situ formed Co and V 2 O 3 can weaken the H H and Mg H bonds respectively to improve the hydrogen storage properties of MgH 2 . These discoveries provide guideline of the further design of high efficiency catalysts for Mg-based hydrogen storage materials.
研究领域:
材料科学
·
化学工程
·
催化
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 19
·11424-11438
·
IF 10.7
Siyuan Chen,Yanhong Wang,Shuanshi Fan,Xuemei Lang,Gang Li
Hydrate-based hydrogen storage is considered one of the most promising hydrogen storage technologies, but its slow formation kinetics impedes its applicability. In this study, a novel method to enhance hydrate nucleation and hydrate growth was proposed. Ultra-rapid and high hydrogen storage was achieved by the new method of quasi-simultaneous formation (q-SF) of propane–hydrogen hydrates. And different kinetic hydrate additives (KHAs) were introduced to enhance the kinetics of hydrate formation. The results demonstrated that this method implemented the transition of progressive nucleation to instantaneous nucleation of hydrogen hydrate, with the enhancing growth kinetics of hydrate. In the study of KHAs, sodium dodecyl sulfate (SDS) had a significant promoting effect on propane–hydrogen hydrate growth, and high-concentration SDS could achieve higher water-to-hydrate conversion. The maximum hydrogen uptake was 67.50 cm3 cm−3 hydrate (0.628 wt%) at 274.15 K and the initial pressure of 18.2 MPa with a system of 0.1 wt% SDS coupled with stirring. The time from hydrate nucleation to the maximum hydrogen uptake of 90% (t90) was only 21 min, and the average hydrate growth rate was 289.28 × 10−2 cm3 cm−3 hydrate·min−1. As far as we know, this is the fastest hydrate growth rate among hydrate-based hydrogen storage technologies so far. A mechanism was proposed to explain the promoting effect of q-SF on hydrate formation kinetics. This work provides unique insights into enhancing the kinetics of hydrogen hydrates, which would contribute to the further development of hydrate-based hydrogen storage technologies.
研究领域:
化学工程
·
能源技术
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Gaofeng Chen,Zhiwei Wang,Na Guo,Lei Liu,Huina Zhu,Qun Wang,Tingzhou Lei
Alcohols, being a substantial category of hydrogen storage liquid fuels, exhibit promising development potential. Alcohol-based hydrogen storage liquid fuels can be efficiently produced from biomass-derived syngas (CO and H2). Considerable efforts have been made in the conversion of syngas to alcohols through a higher alcohol synthesis (HAS) reaction. However, inevitably, there will be significant generation of H2O and C1 byproducts (CO2 and CH4). In this study, a hydrophobic CoCuSNT@C60 catalyst modified with fullerene (C60, an all-carbon cage molecule) was designed to hinder the formation of H2O and C1 byproducts. The hydrophobic C60 shortened the retention of H2O on the active site interface, restraining the water–gas shift reaction. This leads to a significant decrease in CO2 generation, accompanied by an increase in the CO conversion and selectivity toward alcohols. The hydrophobic CoCuSNT@C60 catalyst was characterized by X-ray diffraction, Fourier transform infrared spectra, N2 adsorption–desorption isotherms, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. Compared to the unmodified CoCuSNT, the C60-modified hydrophobic CoCuSNT@C60 catalyst possesses higher CO hydrogenation activity and high alcohol selectivity, along with an impressive stability of up to 350 h to meet industrial applications.
研究领域:
能源化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Jing Lin,Zhanyi Cao,Lianshan Sun,Fei Liang,Limin Wang
Ti 1.4 V 0.6 Ni + x LiAlH 4 ( x = 0.5, 1, 1.5, 2, 2.5, wt.%) composites were prepared by ball-milling, and the effects of LiAlH 4 content on structure and electrochemical properties of the composites were investigated systematically. The addition of LiAlH 4 to the Ti 1.4 V 0.6 Ni alloy significantly affected the morphology and size of the composite particles . The electrochemical cycling stability and rate dischargeability of the composite electrodes benefitted from adding some LiAlH 4 ( x = 1), which however deteriorated when the LiAlH 4 content increased further. The positive effect of LiAlH 4 on the electrochemical performance of the studied alloy was caused by suppression of the dissolution of active components of the Ti 1.4 V 0.6 Ni hydrogen storage alloy.
研究领域:
材料科学
·
金属功能材料
·
能源存储
·
电化学
·
氢能技术
✓ 已验证
DOI
高影响因子
APPLIED ENERGY
·
2024
·
IF 10.1
Yaning Kong,Honglin Yu,Mengqi Liu,Guodong Zhang,Fei Wang
Hydrate was considered to be the next generation hydrogen storage material , and hydrate-based hydrogen storage (HBHS) would play an important role in future hydrogen economy, but sluggish hydrate formation kinetics presents huge technological challenge for its application. Herein, a nano promoter of -SO 3 − @PSNS was prepared by soap-free emulsion polymerization , and a dual kinetic promoter system (L-methionine/-SO 3 − @PSNS) was applied to enhance the formation kinetics of mixed H 2 /DIOX hydrate. At a moderate condition (12 MPa and 274.15 K), hydration efficiency under a driving force of 2.1 MPa is significantly enhanced by the synergy of the dual kinetic promoters, hydrate induction time reduces from 443.2 ± 209.73 min to 24.7 ± 17.16 min, while hydrate growth rate increases by 43.75%, and hydrogen storage capacity is up to 0.473 ± 0.041 wt% that increases by 62.8%. At a more moderate condition (10 MPa and 274.15 K) with an extremely low driving force of 0.1 MPa, enhanced hydrate formation was obtained in a composite promotion system of the dual kinetic promoters and dual thermodynamic promoters (THF/DIOX), which also performs exceptionally in term of recycling. The presence of a small amount (0.35 mol%) of THF reduces the induction time by 93.5%, and hydrate growth rate increases by 130.18%, while satisfactory hydrogen storage capacity (0.346 ± 0.017 g/g) is still remained in mixed H 2 /DIOX/THF hydrate, the structure of which was confirmed by Raman spectrum . This work presents an effect approach on enhancing the formation kinetics of H 2 -contained hydrate under low driving force, and this finding provides important insight for HBHS.
研究领域:
物理化学
·
能源材料
·
气体储存
·
化学工程
·
纳米材料科学
·
分子模拟
·
可持续能源
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Yanying Gong,Jing Lin,Chao Yu,Runze Li,Chengchun Tang,Yang Huang
Formic acid (FA) has garnered considerable interest as a sustainable energy source because of its high hydrogen storage capability and convenient transportability. However, efficient dehydrogenation of FA requires highly selective and efficient catalysts. This study explores the potential of C and O co-doped boron nitride (BNC,O) as a support for Pd nanoparticles in FA dehydrogenation. The BNC,O support has been synthesized through high-temperature pyrolysis and subsequently functionalized with −NH2 groups to enhance the dispersion and anchoring of ultrafine Pd nanoparticles (∼2.1 nm). In comparison to the unmodified catalyst, the resulting Pd/BNC,O-A catalyst demonstrates a significant enhancement in catalytic activity for FA dehydrogenation, achieving an initial turnover frequency (TOF) of 522.0 h–1 at 298 K and 1560.9 h–1 at 338 K with nearly 100% hydrogen selectivity. Characterization techniques reveal that the incorporation of C and O heteroatoms and −NH2 groups into the BNC,O support facilitates the formation of small and well-dispersed Pd nanoparticles while also forming a strong metal–support interaction. The −NH2 groups further promote FA dehydrogenation by acting as proton scavengers. This study highlights the promising potential of C and O co-doped, −NH2 functionalized BNC,O as a support for Pd-based catalysts for efficient FA dehydrogenation.
研究领域:
材料科学
·
催化
·
能源存储
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2013
·Vol. 1
·期 35
·10184-10192
·
IF 0
Jie Shao,Xuezhang Xiao,Lixin Chen,Xiulin Fan,Leyuan Han,Shouquan Li,Hongwei Ge,Qidong Wang
A system of 2LiH–MgB2 and its hydrogenated 2LiBH4–MgH2 is an attractive candidate for hydrogen storage. However, its hydriding–dehydriding kinetics have to be further improved for practical application. In the present work, three kinds of Ni–B nanoparticles with different crystalline states and particle sizes were prepared by wet-chemical reduction and mechanochemical methods, and then introduced into a 2LiH–MgB2 composite for catalytic enhancement. The catalytic roles of Ni–B nanoparticles on the hydriding–dehydriding properties were investigated systematically. The results show that all of the Ni–B nanoparticles can significantly enhance the hydriding–dehydriding kinetics of the 2LiH–MgB2 composite, resulting in no incubation period for the formation of MgB2 during dehydrogenation. The more disordered the amorphous structure and the smaller sized the Ni–B particles are, the better the catalytic effect that is obtained. Microstructure analyses clearly reveal the formation of the MgNi3B2 phase in the dehydriding process, which acts as the nucleation agent for MgB2 formation determined by an edge-to-edge model. Directly doping with Ni–B nanoparticles in the 2LiH–MgB2 system shows a higher hydrogen desorption capacity of 9.4 wt% and obtains a better catalytic efficiency than doping with NiCl2.
研究领域:
材料科学
·
储能材料
·
无机化学
·
纳米催化
·
氢储存
✓ 已验证
DOI
危险品化学品经营许可证（带存储）