INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
·Vol. 48
·期 83
·32459-32468
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IF 7.2
Chengguo Yan,Qinan Wu,Jiaguang Zheng,Dan Li,Jiahuan He,Yugang Shu,Meijia Liu,Liuting Zhang
NaBH 4 has been considered as one of the ideal hydrogen carriers with comparatively high hydrogen capacities towards traditional hydrogen storage materials . However, the hydrogen generation from NaBH 4 needs excess water and costly catalysts to achieve a complete and fast hydrogen release. Herein, we report an innovative strategy to use solid-state multi-hydroxyl mannitol as a reactant towards NaBH 4 , which brings fast and controllable hydrogen release below 80 °C. More than 4.1 wt% H 2 (83% of the theoretical capacity) could be released totally from the NaBH 4 -mannitol composite with high purity. Structural and morphological studies further reveal that mannitol acts as a bi-functional additive to react with NaBH 4 during hydrogen release and protect NaBH 4 from moisture during storage. This work shows potential in developing all-solid-state hydrogen production systems with high-capacity borohydrides .
研究领域:
材料科学
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氢能
·
化学工程
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Xinkai Liu,Sisi Li,Hui Liu
Excessive pressure difference between hydrogen and oxygen generated from sodium borohydride might destroy proton exchange membrane, and too fast hydrogen production rate could even give rise to dangerous battery explosion. So it was urgent to encapsulate the surface of sodium borohydride with a controllable responsive polymeric shell for achieving the effective regulation of hydrogen generation. In this work, a core-shell capsule with sodium borohydride as the core and dopamine-containing copolymer as the shell was prepared. Transmission Electron Microscopy , Energy Dispersive X-Ray Spectroscopy, Fourier transform infrared spectra and Nuclear Magnetic Resonance Spectroscopy verified successful synthesis of the desired capsule. The encapsulated sodium borohydride exhibited good chemical stability and reversible photo-crosslinking under ultraviolet light irradiation . The dopamine-containing copolymer as the shell layer could effectively protect sodium borohydride core layer from the damage of surrounding aquifer media. Hydrogen generation determination indicated that the rate and yield of hydrogen production of core-shell capsule could be well regulated to cope with the change of external conditions such as pH, sodium chloride and ultraviolet light. It seemed that core-shell capsule with the copolymeric encapsulation might have great potential application prospects in fuel cells.
研究领域:
材料科学
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化学工程
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能源技术
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 6
·3120-3127
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IF 3.591
Yixuan Huang,Liyan Xie,Kangji Zhuo,Hao Zhou,Yanhui Zhang
MIL-101(Fe)-based composite materials and their application for the generation of H2 by the catalytic reduction of nitro organics are reported in this study. NaBH4 and water contribute hydrogen for the catalytic reduction of nitro organics, but the possibility of nitro organics as a potential hydrogen source is often overlooked due to the simplicity of the reaction. However, experiments have revealed that the reaction process is accompanied by the production of H2, which is affected by the concentration of nitro organics. Moreover, the reaction is more conducive to the generation of H2 compared to NaBH4 hydrolysis under the same conditions. Unlike specially catalyzing the expensive NaBH4 hydrolysis, hydrogen is a by-product of the reduction of pollutants by inexpensive catalysts (NaBH4 acted as an electron donor for the catalyst). Accordingly, the reaction mechanism of p-nitrophenol hydride reduction was optimized. This work provides a new perspective on the application of this reaction.
研究领域:
化学工程
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环境科学
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材料科学
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产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 90
·49287-49294
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IF 3.708
Xiao-Qiong Wu,Xing-Wen Wu,Jiang-Shan Shen,Hong-Wu Zhang
Developing robust and facile catalytic systems for converting nitroaromatic compounds to NH2-containing compounds are of importance to decrease or even eliminate their toxicity or risk in the environment. In view of in situ formed metal nanoparticles, the metal ion (Cu2+, Ag+, AuCl4−, Co2+ and Ni2+)/NaBH4 systems were employed to catalyze the reduction reaction of nitroaromatic compounds. By employing the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) as a model reaction, the effects of concentration of NaBH4, 4-NP and metal ions on the rate constants of the catalytic reduction reactions were systematically investigated. Apparent activation energies of these metal ion/NaBH4 catalytic systems were further measured and compared. In situ formed metal NPs could be characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Furthermore, these metal ion/NaBH4 systems were successfully employed to catalyze the reduction reaction of a series of other nitroaromatic compounds. These metal ion/NaBH4 catalytic systems investigated in this protocol are simple and do not require the preparation of metal nanoparticles in advance, compared with previous related reports.
研究领域:
环境科学
·
催化化学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Shujun Qiu,Guangfa Cai,Wenjin Huang,Jiaxi Liu,Hailiang Chu,Yongpeng Xia,Yongjin Zou,Lixian Sun
The hydrolysis of NaBH 4 is a promising method for hydrogen generation. However, the reaction rate is very slow without suitable catalysts, making the development of efficient non-noble-metal catalysts a key research focus. In this work, we successfully prepared carbon dots-derived nanosheets (CDNS) and used them as a support for loading CoB particles, resulting in CoB/CDNS catalysts. The effects of different heating temperatures and metal loading amounts on the hydrogen generation rate (HGR) of NaBH 4 hydrolysis were systematically studied through structural characterization and performance testing. The experimental results demonstrated that the optimal Co 2 B/CDNS 600 catalyst exhibited superior catalytic activity, achieving an HGR of 5333 ± 65 mL H2 ·g − 1 Co–B ·min − 1 and an apparent activation energy of 38.9 ± 2.2 kJ·mol −1 . After five cycles, this catalyst retained 60.42 %–70.62 % of its initial performance. This retention is attributed to the presence of more defects and abundant functional groups in CDNS 600 as catalyst carrier. Consequently, the agglomeration of CoB particles with appropriate loading amounts was effectively suppressed. This work establishes a new pathway for developing efficient cobalt-containing catalysts for heterogeneous catalysis to rapidly generate hydrogen.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 8.3
Chenxi Shang,Zhendong Gao,Boxuan Lu,Huaxia Zhou,Tingting Tang,Tayirjan Taylor Isimjan,Xiulin Yang
Rare-earth metal-based materials have rapidly gained attention as leading candidates for high-performance hydrogen storage, offering a promising direction for the advancement of clean energy technologies. In this study, a novel composite catalyst (Fe–Dy 2 O 3 /CoB) was constructed by introducing the rare-earth metals dysprosium (Dy), which significantly enhanced the catalytic performance of sodium borohydride hydrolysis. The experimental findings revealed that the Fe–Dy 2 O 3 /CoB catalyst demonstrated outstanding hydrogen generation efficiency (5512.4 mL min −1 g −1 ), accompanied by a notably low apparent activation energy (47.81 kJ mol −1 ) at 25 °C. Our results reveal that the incorporation of dysprosium not only optimized the electronic structure of the catalyst but also significantly improved the adsorption and activation of reactants. Additionally, the inclusion of iron imparted magnetic properties to the catalyst, facilitating easy separation and recycling via an external magnetic field. Notably, the hydrogen generated via this catalytic system is sufficient to power fuel cell-driven small vehicles, fully showcasing its practical application capability in on-demand hydrogen supply scenarios. This work highlights the untapped potential of rare-earth elements in tailoring the electronic structure of multi-component catalysts. It establishes a generalizable strategy for designing next-generation hydrogen generation systems based on NaBH 4 hydrolysis.
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高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
W. Chen,L.Z. Ouyang,J.W. Liu,X.D. Yao,H. Wang,Z.W. Liu,M. Zhu
Sodium borohydride (NaBH 4 ) hydrolysis is a promising approach for hydrogen generation , but it is limited by high costs, low efficiency of recycling the by-product, and a lack of effective gravimetric storage methods. Here we demonstrate the regeneration of NaBH 4 by ball milling the by-product, NaBO 2 ·2H 2 O or NaBO 2 ·4H 2 O, with MgH 2 at room temperature and atmospheric pressure without any further post-treatment. Record yields of NaBH 4 at 90.0% for NaBO 2 ·2H 2 O and 88.3% for NaBO 2 ·4H 2 O are achieved. This process also produces hydrogen from the splitting of coordinate water in hydrated sodium metaborate. This compensates the need for extra hydrogen for generating MgH 2 . Accordingly, we conclude that our unique approach realizes an efficient and cost-effective closed loop system for hydrogen production and storage.
研究领域:
材料科学
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化学工程
·
能源技术
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yuxin Li,Guolang Zhou,Jingzhou Yin,Jianmei Chen,Chao Tang,Cheng Liu,Qiaoqi Li,Tianshi Wang,Feng Li,Chao Yao,Lili Zhang
The production of hydrogen from sodium borohydride (NaBH 4 ) with a suitable catalyst is a promising route for the hydrogen industry. The exploration of the energy-saving catalysts with visible light response and photothermal effect is necessary for utilizing solar energy in hydrogen utilization from hydrolysis of NaBH 4 . In this study, a series of photo-thermal catalysts of Co x FeAl layered double hydroxides (Co x FeAl-LDHs x = 4, 6, 8) with abundant oxygen vacancy (V o ) are successfully synthesized for photo-thermal synergic catalytic H 2 generation from hydrolysis of NaBH 4 . Co x FeAl-LDHs differ in bandgap, V o concentration, and photo-thermal performance, with Co 6 FeAl-LDH show the highest concentration of V o and most efficient photo-thermal performance under 400–700 nm irradiation. Co 6 FeAl-LDH can significantly lower the activation energy of the hydrolysis of NaBH 4 ( E a = 35.46 kJ mol −1 ) and demonstrates excellent photo-thermal synergic performance with H 2 generation rate of 3.38 mol g −1 h −1 without additional heat source. The mechanism study shows that the h + , ∙OH, and V o in Co x FeAl-LDHs also play essential roles in the hydrolysis of NaBH 4 . This work develops a hydrotalcite-based photo-thermal synergistic catalyst, which provides a new approach for the design of sodium borohydride hydrolysis catalysts for hydrogen production.
研究领域:
材料科学
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催化化学
·
可再生能源
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Miaolian Ma,Wanpeng Zhou,Yu Zhang,Qisen Huang,Zhixuan Hu,Liuzhang Ouyang
Herein, natural lignin is used for the first time as a catalyst for the methanolysis of NaBH 4 . Lignin exhibits excellent catalytic activity for the methanolysis of NaBH 4 , and the HGR value is as high as 20425 mL H 2 ·g cat −1 ·min −1 at room-temperature. It is still satisfactory even at − 20 ℃, with a HGR of 2182 mL H 2 ·g cat −1 ·min −1 , which is the highest value reported in the literature to date. In addition, the study of kinetic reaction orders for NaBH 4 methanolysis catalyzed by lignin indicates that the catalytic methanolysis of NaBH 4 obeys first-order kinetics with respect to both of NaBH 4 concentration and catalyst dosage. The activation energy for the methanolysis catalysis by lignin is calculated to be 19.5 kJ·mol −1 at low temperature of − 20 ∼ 25 ℃. The lignin retain over 66% of the original catalytic activity at the end of fifth consecutive reuse, and the catalytic activity can be completely recovered through simple acid treatment.
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DOI
高影响因子
HYDROMETALLURGY
·
2023
·
IF 4.7
Anyang Tang,Jiahe Zhang,Huazhen Cao,Huibin Zhang,Guoqu Zheng
The synthesis of refractory rhenium (Re) powders is significant for the production of rhenic products. In this work, the ultra-fine Re nanoparticles were synthesized via a combination of aqueous-phase reduction and rapid hydrogen reduction using NH 4 ReO 4 as Re source. The theoretical reduction route was determined by investigating the Eh-pH diagram of the Re -H 2 O system and conducting thermodynamic calculations. The optimal results were achieved by adjusting the experimental parameters like acid type, initial acidity, molar ratio of BH 4 − : ReO 4 − , feed rate of reductant, reaction temperature (T), and reaction time (t). The amorphous Re powders with minor oxide inclusions can be prepared under the optimized conditions of [HCl] = 1.35 mol L −1 , BH 4 − : ReO 4 − molar ratio = 5.32, feed rate = 15 mL min −1 , reaction temperature = 30 °C, and reaction time = 30 min. The maximum reduction efficiency reaches 99.5%. After annealing in hydrogen for 30 min, the crystalline Re nanoparticles with low oxygen content can be obtained. This work demonstrates the feasibility and efficacy of rapidly synthesizing ultra-fine Re nanoparticles in a solution-based approach.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2017
·
IF 2.714
Peng Li,Sen Li,Yu Wang,Yu Zhang,Guo-Zhi Han
Increasing application of noble-metal nanoparticles (MNPs) urges the development of a nontoxic and environmentally friendly synthesis methodology. In this paper,using β-Cyclodextrin (β-CD) as reducer and stablizer, a green synthetic approach of monodispersed silver nanoparticles (AgNPs) with diameter between 10–25 nmin aqueous alkaline medium is reported. By varying the molar ration of β-CD/AgNO 3 , the size of as-prepared silver particles can be readily controlled. Furthermore, the formation mechanism of the AgNPs was discussed. On the basis, the catalytic activity of the as-prepared AgNPs was studied toward reduction of p -nitrophenol by NaBH 4 . The experimental results shown that surface modified by β-CD can improve the catalytic activity of the silver nanoparticles.
研究领域:
材料科学
·
纳米技术
·
环境化学
·
催化
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·Vol. 46
·期 55
·28156-28165
·
IF 5.816
Jiaguang Zheng,Meijia Liu,Fuying Wu,Liuting Zhang
NaBH 4 has been widely considered as a low-cost hydrogen storage material with high gravimetric hydrogen capacity of about 10 wt%. However, its strong thermodynamic stability severely hinders the application of NaBH 4 to obtain hydrogen. In this study, multi-hydroxyl xylitol, for the first time, was chosen as a protic hydrogen carrier to destabilize and react with NaBH 4 . The NaBH 4 -xylitol composites were easily prepared through hand-milling, which leads to the fast liberation of hydrogen from moderate temperatures lower than 80 °C with more than 3.6 wt% hydrogen desorption capacity. Besides, over 80% of hydrogen could be efficiently released in NaBH 4 -xylitol composite. The dehydrogenation process is proved to be completely impurity-free and controllable by altering the NaBH 4 /xylitol ratios and operating temperatures. The reaction between NaBH 4 and xylitol is investigated to be similar to an alcoholysis procedure, however no observable liquid phase takes place before and after the dehydrogenation of NaBH 4 -xylitol composite, showing a great potential to produce hydrogen under low temperatures through solid-state carriers.
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DOI
高影响因子
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