INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Hui Liang,Dandan Chen,Damien Thiry,Wenjiang Li,Minfang Chen,Rony Snyders
High-energy density and low cost magnesium nanoparticles (Mg NPs)-based material are being sought to meet increasing capable of hydrogen (H 2 ) storage demand. Here, a kind of air-stable Mg NPs supported on porous structured multi-walled carbon tubes-polymethyl methacrylate (MWCNTs-PMMA) template is prepared owing to reversible well-distributed, dispersed and small-sized Mg/MgH 2 NPs. The aim is to improve the H 2 storage capacity, hydrogen sorption kinetics and thermodynamics of nano Mg-based system without using catalyst. The organic Mg precursor was directly in-situ reduced to metallic Mg NPs in MWCNTs-PMMA template by lithium naphthalide. The size distribution of reduced Mg nanoparticles is around 3.6 ± 0.2 nm, confirmed by XRD and TEM analyses, which is due to the strong interaction between Mg NPs and MWCNTs-PMMA via PMMA binding Mg 2+ , as well as the confinement of porous template hindered the growth and agglomeration of Mg NPs. Moreover, except H 2 , O 2 and H 2 O molecules can't infiltrate the porous structure of MWCNTs-PMMA resulted in the presence of air stable Mg NPs in the MWCNTs-PMMA. The work provides a new scope to prepare nano metal-based composite for H 2 storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Shuchao Jiang,Hongqi Shi,Yuzhe Xu,Jiaojiao Liu,Tie Yu,Guoqing Ren
Formic acid (FA, HCOOH) is regarded as one of the most promising carriers for hydrogen storage. However, the catalyst design for FA dehydrogenation into H2 with high efficiency is not clear. Here, we elucidate the rationale of size effect over the most commonly used Pd-based catalyst through supporting different Pd species, including single atoms, nanoclusters, and nanoparticles, on amine-functionalized active carbon (Pd/AC-NH2). The activity test presents that Pd/AC-NH2 with Pd nanoclusters exhibits the best turnover frequency (TOF) value of 40856 h–1 for 1 M FA at 328 K and even 1504 h–1 for neat FA at 308 K, which is comparable to the homogeneous catalysts and has been the first heterogeneous catalyst used in neat FA dehydrogenation under mild conditions. The comprehensive characterizations reveal that the size of Pd species affects the ratios of Pd0/Pd2+ and hydrogen spillover effect, which is crucial for the C–H cleavage and H2 desorption. Besides, the influences of amine groups on catalytic performance were further examined. This work provided an ingenious guideline to design efficient and practical catalysts for hydrogen storage under ambient conditions.
研究领域:
化学工程
·
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Chengbao Liu,Dongchen Shen,Zhengkai Tu,Song Li
Li + doping is regarded as an effective strategy to enhance the room-temperature hydrogen storage of metal-organic frameworks (MOFs). In this work, Li + is doped into both MIL-100(Fe) and MIL-100(Fe)/graphene oxide (GO) composite, and it is demonstrated that the hydrogen uptake of Li + doped MIL-100(Fe)/GO (2.02 wt%) is improved by 135% compared with Li + doped MIL-100(Fe) (0.86 wt%) at 298 K and 50 bar, which is ascribed to its higher isosteric heat of adsorption (7.33 kJ/mol) resulting from its more accessible adsorption sites provided by doped Li + ions and ultramicropores. Grand canonical Monte Carlo (GCMC) simulation reveals that Li + ions distributing in the interface between MIL-100(Fe) and GO within MIL-100(Fe)/GO composite is favorable for hydrogen adsorption owing to the increased number of adsorption sites, thus contributing to the enhanced hydrogen storage capacity. These findings demonstrate that MIL-100(Fe)/GO is a more promising Li + doping substrate than MIL-100(Fe).
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Z.W. Zhu,Q.R. Zheng
Comparisons were made between the samples mechanochemically (MOF-5(M)) and solvothermally (MOF-5(S)) prepared for the development of efficient hydrogen storage medium. Synthesized samples were undergone structural characterization as well as adsorption equilibrium measurements of hydrogen at temperature-pressure range 77 K–87 K and 0.1–10 MPa. Grand Canonical Monte Carlo (GCMC) simulations were further conducted to study the behaviors of hydrogen molecules adsorbed on MOF-5. It shows that, besides the advantage of large scale synthesis and a lower cost, mechanochemical method respectively brings about 207% and 90.5% increments in the specific surface area and the maximum excess adsorption capacity of hydrogen at 77 K within pressure range 0–10 MPa. Results also reveal that the crystal within MOF-5(M) is regular and distributing uniformly with a mean size only one tenth of that of the MOF-5(S); at 77 K within pressure range 0–10 MPa, Toth equation can predict the adsorption equilibrium data of hydrogen on two MOF-5 samples with a mean relative error less than 1.5%. It suggests that MOF-5(M) is more promising for hydrogen storage by adsorption for practical applications.
研究领域:
材料科学
·
能源研究
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 22
·14980-14990
·
IF 3.9
Xiaoyu Hu,Jinchuan Wang,Shangkun Li,Xuanhao Hu,Rongxing Ye,Linsen Zhou,Peilong Li,Changlun Chen
Extensive research has been devoted to developing metal nanoparticle (NP) doped porous materials with large hydrogen storage capacity and high hydrogen release pressure at ambient temperature. The ultra-sound assisted double-solvent approach (DSA) was applied for sample synthesis. In this study, tiny Pd NPs are confined into the pore space of HKUST-1, affording Pd@HKUST-1-DS with minimizing the aggregation of Pd NPs and subsequently the formation of Pd NPs on the external surface of HKUST-1. The experimental data reveal that the obtained Pd NP doped Pd@HKUST-1-DS possessed an outstanding hydrogen storage capacity of 3.68 wt% (and 1.63 wt%) at 77 K and 0.2 MPa H2 (and 298 K and 18 MPa H2), in comparison with pristine HKUST-1 and impregnated Pd/HKUST-1-IM. It is found that the storage capacity variation is not only ascribed to the different textural properties of materials but is also illustrated by the hydrogen spillover induced by different electron transport from Pd to the pores of MOFs (Pd@HKUST-1-DS > Pd/HKUST-1-IM), based on X-ray photoelectron spectroscopy and temperature desorption spectra. Pd@HKUST-1-DS, featuring high specific surface area, uniform Pd NP dispersion and strong interaction of Pd with hydrogen in the confined pore spaces of the support, displays the high hydrogen storage capacity. This work highlights the influence of spillover caused by Pd electron transport on the hydrogen storage capacity of metal NPs/MOFs, which is governed by both physical and chemical adsorption.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2013
·
IF 3.548
Qiang Zhao,Wen Yuan,Jianming Liang,Jinping Li
Metal−organic framework UiO-66 has high chemical and thermal stability. However, it is difficult to produce such Zr-based MOFs with good crystalline morphology. Here, highly pure metal−organic framework UiO-66 has been synthesized at low temperature (50 °C). The as-synthesized sample has been characterized by X-ray diffraction, thermogravimetric analysis , nitrogen adsorption , and scanning electron microscopy. Its hydrogen-storage capacity has been measured by means of an Intelligent Gravimetric Analyser. The results showed that UiO-66 was synthesized in octahedral crystals of well-defined sizes (150−200 nm) and had a high specific surface area (1358 m 2 /g). The as-synthesized UiO-66 showed a significant hydrogen uptake even at a moderate pressure, which increased to 3.35 wt% at 77 K and 1.8 MPa. A grand canonical Monte Carlo simulation (GCMC) has been employed to calculate the adsorption of hydrogen in UiO-66. The result of this simulation provided a theoretical foundation for the experimental results.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Yongyang Zhu,Liuzhang Ouyang,Hao Zhong,Jiangwen Liu,Hui Wang,Huaiyu Shao,Zhenguo Huang,Min Zhu
Sodium borohydride (NaBH4) has been identified as one of the most promising hydrogen storage materials; however, it is still challenging to produce NaBH4 with low cost and high efficiency, which are largely determined by the sources of boron and hydrogen and reducing agents used. Herein, we report an economical method to produce NaBH4 by ball milling hydrated borax (Na2B4O7·10H2O and/or Na2B4O7·5H2O) with different reducing agents such as MgH2, Mg, and NaH under ambient conditions. The direct use of natural hydrated borax avoids the dehydration process (at 600 °C) and consequently reduces cost and improves overall energy efficiency. A high yield of 93.1% can be achieved for a short ball mill duration (3.5 h) for Na2B4O7·5H2O-NaH-MgH2 system. In this system, H2 is generated in situ which subsequently reacts with Mg forming MgH2. Low cost Mg is therefore employed to replace the majority of MgH2, leading to an attractive yield of 78.6%. To further reduce the cost of raw materials and improve the utilization of hydrogen source in the hydrated borax, Na2B4O7·10H2O is used to partially substitute for Na2B4O7·5H2O, leading to a complete replacement of MgH2. Compared with literature results, the optimized recipe features low cost and high efficiency since it utilizes hydrogen from the hydrated water in natural borax and avoids high temperatures. Our finding is expected to facilitate applications of NaBH4 for hydrogen storage.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2025
·
IF 4.4
Chengguang Lang,Lei Zhang,Cheng-Jie Yang,Hanwu Dong,Hao Zhong,Chung-Li Dong,Jun Chen,Aijun Du,Yi Jia,Liuzhang Ouyang,Xiangdong Yao
Solid-state hydrogen storage materials with optimal binding energy are essential for hydrogen storage and transportation applications and pose long-standing challenges. Current technologies, including molecular physisorption materials (e.g., metal–organic frameworks (MOFs), carbon nanotubes (CNTs), activated carbons (ACs)) and atomic chemisorption materials (e.g., MgH 2 , LiBH 4 , NH 4 BH 4 ), fall short of meeting practical application requirements. Therefore, designing and constructing new solid-state hydrogen storage materials at the atomic level is critically important. In this study, the use of defect engineering is explored to modulate hydrogen adsorption sites on TiO 2 surfaces. The results demonstrate that low-coordinated titanium (Ti) atoms on TiO 2 can serve as effective hydrogen adsorption sites, storing hydrogen through molecular chemisorption with significantly enhanced adsorption energy compared to Ti atoms in high coordination states. Moreover, the adsorbed hydrogen remains in molecular form, facilitating easy desorption at room temperature, unlike titanium hydride, which requires high temperatures for desorption. This approach provides a promising pathway for developing efficient hydrogen storage materials by leveraging the unique properties of low-coordinated Ti atoms on TiO 2 surfaces.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2016
·
IF 3.205
Yu-Jie Zhong,Hong-Bin Dai,Min Zhu,Ping Wang
Hydrous hydrazine (N 2 H 4 ⋅H 2 O) has attracted considerable interest as a potential hydrogen carrier for vehicular or portable applications. But currently, most of published experimental works focus on dilute N 2 H 4 ⋅H 2 O solution with a limited hydrogen capacity to 2 wt%, which is well below the practical requirements. Herein, we report the catalytic decomposition of concentrated N 2 H 4 ⋅H 2 O solution over a La 2 O 3 -supported Ni Pt alloy catalyst . The Ni Pt/La 2 O 3 catalyst prepared by a one-pot co-precipitation method shows exceptionally high catalytic activity and 100% selectivity towards hydrogen generation from N 2 H 4 ⋅H 2 O at ambient temperatures. In particular, our study has demonstrated, for the first time, that the system composed of concentrated N 2 H 4 ⋅H 2 O solution, high-performance Ni Pt/La 2 O 3 catalyst and appropriate amount of alkali promoter can yield a material-based hydrogen capacity of 6 wt%. This finding is of clear significance for promoting the practical application of N 2 H 4 ⋅H 2 O as a viable hydrogen carrier.
研究领域:
化学工程
·
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Liang Dan,Hui Wang,Jiangwen Liu,Liuzhang Ouyang,Min Zhu
Highly fine, dispersive, and active catalysts are essential for lowering the operating temperature of MgH2, a promising high-capacity material for solid-state hydrogen storage. In this work, ultrafine Ni nanoparticles (2–6 nm) are synthesized from the precursor nickel acetylacetonate (C10H14NiO4) on the surface of MgH2 by H2 plasma reduction process, followed by further ball milling. The obtained composite could rapidly release more than 6.5 wt % H within 10 min at 275 °C. Even at a low temperature of 225 °C, up to 6 wt % H could be desorbed. The MgH2–Ni composite also exhibits excellent low-temperature hydrogenation kinetics and almost no capacity degradation over nine hydrogenation/dehydrogenation cycles. The significant improvement in the hydrogen-storage properties is attributed to the in situ formation of ultrafine and stable Mg2NiH0.3 nanocrystals during cycling. This work provides a convenient approach to synthesize ultrafine metal nanoparticles for catalytic applications in the field of high energy storage density hydride materials.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Sohail Yasin,Jianfeng Shi,Song Yihu,Chen Qi,MaioMiao Yang,Wenzhu Peng,Ce Zheng,Yang Li,Chaohua Gu
Rubber nanocomposites used for hydrogen (H 2 ) energy storage demand tailored mechanical and compressed gas permeation properties. Herein, deep eutectic solvent (DES) is used as a promising silica dispersant to mediate the mechanical and gas swelling behavior of nitrile rubber (NBR) nanocomposites. The results reveal that DES improves the mechanical deformational stress and lowers the swelling degree with well-dispersed silica in NBR, allowing the preparation of high-performance nanocomposites with potential applications in preventing H 2 leakage in high-pressure equipment facilities. Under 0.01 and 90 MPa H 2 pressures at 24 °C and 37 °C, the NBR nanocomposites with DES demonstrate lower swellings, and the improved crosslinking density and nanofillers dispersion enhance the mechanical properties while retaining the dissipation of the Mullins effect. This sheds light on the mechanical failure mechanism and the design of tailorable high-pressure rubber sealings.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Meijia Liu,Shuchun Zhao,Xuezhang Xiao,Man Chen,Chenghua Sun,Zhendong Yao,Zhencan Hu,Lixin Chen
Magnesium hydride (MgH 2 ) offers large capacity for hydrogen storage , but poor thermodynamics and kinetics for releasing hydrogen. In this work, the novel 1D bamboo-shaped carbon nanotubes (BCNTs) are firstly used as carriers for the self-assembly of MgH 2 (denoted as MgH 2 @BCNTs). The high specific surface area (262.3 m 2 g -1 ) and large diameter (over 80 nm) of BCNTs contribute to extremely high loading capacity (76.8 mass fraction), small particle size (15–20 nm) and uniform distribution of MgH 2 nanoparticles (NPs). The well-defined MgH 2 @BCNTs shows remarkably improved thermodynamics and kinetics for H 2 adsorption and desorption. In particular, it starts to release hydrogen at about 220 °C, near 170 °C lower than that of the commercial MgH 2 , as well it tends to be hydrogenated even at a relatively low temperature of 100 °C by absorbing 3.56 wt% H 2 . Moreover, a reversible capacity up to 5.79 wt%, including the “dead weight” of BCNTs, and is well maintained after 10 cycles. The dehydrogenation E a and Δ H of MgH 2 @BCNTs can be reduced to 97.97 kJ/mol and 68.92 kJ/mol, which are 111.24 kJ/mol and 6.07 kJ/mol lower than those of the commercial MgH 2 , respectively. By high pressure densification treatment, the MgH 2 @BCNTs system achieves an exceptional volumetric capacity up to 65.90 g/L without obvious performance degeneration, resulting from the special structure of BCNTs with inner intervals which works as supports under ultra-high pressure of 750 MPa. Our innovative design of 1D BCNTs supporting MgH 2 NPs with high loading weight offers new strategy to synchronously improve the gravimetric and volumetric capacity, as well as the hydrogen storage kinetics and thermodynamics of the nanoconfinement system in the future.
研究领域:
材料科学
·
能源科学
✓ 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）