JOURNAL OF ALLOYS AND COMPOUNDS
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2017
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IF 3.133
Miaojun Huang,Hao Zhong,Liuzhang Ouyang,Chenghong Peng,Xiaoke Zhu,Weiheng Zhu,Fang Fang,Min Zhu
The application of NaBH 4 hydrolysis to hydrogen generation is currently obstructed by its regeneration. Finding a simple and low cost method to regenerate its hydrolysis byproduct is therefore important. Herein, the regeneration of NaBH 4 is obtained by reacting its direct hydrolysis byproduct, NaBO 2 ·2H 2 O, with a mixture of Mg and Mg 2 Si by ball milling. In this reaction, the reduced agents are only metal and intermetallic compounds , thus hydrogen in the regenerated NaBH 4 (H δ− ) derives solely from NaBO 2 ·2H 2 O (H δ+ ). The introduction of Mg 2 Si increases the NaBH 4 regeneration yield to 86%, which is the highest regeneration yield reported for NaBH 4 until now. The reaction mechanism was also clarified for the first time.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Energy Storage Materials
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2017
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IF 0
Hao Zhong,Liu Zhang Ouyang,Jian Shan Ye,Jiang Wen Liu,Hui Wang,Xiang Dong Yao,Min Zhu
The hydrolysis of NaBH 4 offers significant advantages for hydrogen storage in fuel cells, whereby suffers from the irreversibility . Thus, a simple and low cost method for NaBH 4 regeneration from its hydrolysis byproduct is crucial. Herein, we describe a single step method for NaBH 4 regeneration, which combines both hydrogen production and storage in the one step. In the process, a mixture of magnesium silicide and dihydrate sodium metaborate is reacted via ball milling under ambient conditions without the requirements of additional hydrogen sources . The hydrogen only comes from the splitting of H 2 O in the NaBO 2 ·2H 2 O that is a direct byproduct of NaBH 4 hydrolysis. The purified product demonstrates the same physicochemical properties as commercial NaBH 4 . Yields for NaBH 4 regeneration approaching 80% are achieved using this method. Mechanism study indicates that the high yield is likely to be beneficial from the formation of the Mg-O-Si-H conjugated structure. NaBH 4 regeneration using this process demonstrates a 30-fold reduction in cost over a previous study that used MgH 2 as the reduction agent.
研究领域:
化学
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材料科学
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能源存储
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DOI
International Journal of Applied Ceramic Technology
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2024
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IF 1.8
Yinghua Zhuang,Feng Sun,Lijuan Zhou,Changxi Jiang,Jianjun Wang,Shuang Li,Shengjun Liao
Silicon nitride (Si 3 N 4 ) ceramics using four compound sintering aids Er 2 O 3 –MgO, Er 2 O 3 –MgF 3 , Er 2 O 3 –Mg 2 Si, and Er 2 O 3 –Mg 3 N 2 . The effects of binary sintering aid types and temperatures on the microstructure, mechanical properties, and thermal conductivity of Si 3 N 4 ceramics were investigated. The depolymerization effect of fluorine atoms introduced by MgF 2 sintering additives on the silicate melt structure reduced the viscosity of the liquid phase. However, the existence of volatile phase leads to low density of Si 3 N 4 ceramics. While the additional Si and N atoms increase the concentration of solute atoms, which was conducive to sintering densification of Si 3 N 4 ceramics. Although Mg 2 Si and Mg 3 N 2 sintering aids produced higher viscosity liquid phase compared with MgF 2 , denser Si 3 N 4 ceramics were obtained at 1900°C. The Si 3 N 4 ceramics doped with 5 mol% Er 2 O 3 and 2 mol% Mg 3 N 2 at 1900°C showed the excellent properties: including the highest Vickers hardness (16.8 GPa), flexural strength (912 MPa), and fracture toughness (8.1 MPa m 1/2 ), as well as the desirable thermal conductivity (83 W/(m K)).
研究领域:
材料科学
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陶瓷工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Kang Chen,Mili Liu,Zhuoyin Peng,Hao Zhong,Lang Gan,Jincheng Huang,Jing Zhao,Hui Wang,Jiangwen Liu,Huaiyu Shao,Liuzhang Ouyang
LiBH 4 (LB in short) with a hydrogen capacity as high as 18.5 wt% and a low molecular weight (21.78 g mol −1 ) is among the most promising candidates for the hydrogen-based economy. However, current major technologies in (re)generation of LB rely heavily on energy-intensive processes, which greatly prohibits practical scaling-up of applications. Here we report a sustainable and effective approach to (re)generate LB via converting renewable H + in crystalline water into H - , achieving a desirable yield of ∼50%. This one-step synthesis method relies on the reaction between spent fuels, specifically LiBO 2 · x H 2 O, and Mg-based alloys to form LB under ambient atmosphere. Notably, our approach surpasses the efficiency of other conventional method, such as LiH-B-H 2 and MgH 2 -LiBO 2 systems, which not only bypasses the energy-intensive dehydration procedure of LiBO 2 · x H 2 O (∼470 ℃) but also eliminates the use of costly hydrides or high-pressure H 2 . Our findings indicate that Mg participated in the regeneration process prior to Al in Mg-Al alloys and [BH 4 ] - is gradually evolved from other intermediate species [BH x (OH) 4- x ] - ( x = 0, 1, 2, 3). By combining hydrogen release and efficient storage of hydrogen-rich substrate in a closed materials cycle, this study may shed light on a promising step toward application of renewable hydrogen in a fuel cell-based hydrogen economy.
研究领域:
材料科学
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能源科学
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化学工程
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DOI
高影响因子
Acta Biomaterialia
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2026
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IF 10.4
Yihui Sun,Yingshuai Wang,Qianbo He,Min Zhao,Jiaru Guo,Chunjie Xu,Qiupeng Yan,Yanchun Chen,Bingqiang Zhang,Hongmei Du,Jing Huo,Yong Zhang,Haoyun Zhang,Yingjun Guan,Qianjun He
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease characterized by progressive motor neuron degeneration in the brain and spinal cord, with mutant superoxide dismutase 1 (SOD1) induced oxidative stress and neuroinflammation as key pathogenic drivers. Here, we uncover that mutant SOD1 is both a Fenton-like agent able for catalytical generation of ·OH and a hydrogenation catalyst for H 2 scavenging reactive oxygen species. To enhance the bioavailability of H 2 , we develop an orally administered Mg 2 Si nanosheets based feed for sustained release of high-amount H 2 . On an ALS model of hSOD1 G93A transgenic mice, Mg 2 Si feed remarkably delays ALS progression, improves the motor performance of ALS mice, and extends their lifespan. Histopathologically, oral Mg 2 Si treatment ameliorates motor neuron degeneration, misfolded SOD1 aggregation and reactive gliosis in spinal cord, while protecting neuromuscular junctions and ameliorating muscle atrophy during disease progression. Transcriptomic analysis demonstrates the H 2 -mediated down-regulation of both oxidative stress and neuroinflammatory pathways in response to the suppression of NLRP3 inflammasome activation. The proposed strategy of catalyzed hydrogen therapy offers an inspiration for metalloproteases-related neurodegenerative diseases treatment. Statement of Significance Amyotrophic lateral sclerosis (ALS) is an incurable and devastating neurodegenerative disease lacking effective clinical interventions. Although hydrogen gas (H 2 ) exhibits promising neuroprotective potential, conventional H 2 therapy is severely limited by unstable and transient H 2 release, failing to sustain long-term treatment requirements for chronic ALS pathogenesis. To overcome this bottleneck, we engineer oral administrable Mg 2 Si nanosheets that enable sustained H 2 release via gastrointestinal retention, achieving stable long-term hydrogen supplementation in vivo . Mechanistically, Mg 2 Si-derived H 2 efficiently eliminates excess free radicals triggered by toxic mutant SOD1, and further disrupts the pathological crosstalk between oxidative stress and neuroinflammation in ALS. In transgenic ALS mice, dietary Mg 2 Si intervention markedly ameliorates motor dysfunction and effectively delays disease progression. Collectively, this study firstly applies Mg 2 Si nanomaterial-based sustained hydrogen therapy for ALS treatment, establishes a novel gastrointestinal hydrogen delivery strategy, and provides an innovative and clinically translatable paradigm for the design of hydrogen delivery systems against neurodegenerative disorders. Download: Download high-res image (244KB) Download: Download full-size image
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PubMed
高影响因子
FUEL
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2019
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IF 5.128
Xue-Ke Li,Zhi-Min Zong,Yi-Feng Chen,Zheng Yang,Guang-Hui Liu,Fang-Jing Liu,Xian-Yong Wei,Bao-Jun Wang,Feng-Yun Ma,Jing-Mei Liu
A highly active difunctional Ni-Mg 2 Si/γ-Al 2 O 3 was prepared by thermally decomposing nickel tetracarbonyl onto γ-Al 2 O 3 impregnated with Mg 2 Si. The non-catalytic hydroconversion (NCHC) and catalytic hydroconversion (CHC) of the extract ( E ) and extraction residue (ER) from Yinggemajianfeng lignite were investigated over Ni-Mg 2 Si/γ-Al 2 O 3 at 240 °C in n -hexane. Benzyloxybenzene and oxybis(methylene)dibenzene were used as lignite-related model compounds to speculate the possible mechanisms for the catalytic hydrocracking and hydrogenation over Ni-Mg 2 Si/γ-Al 2 O 3 . As a result, more organic matter in ER was converted to soluble portion (SP) by the CHC than by the NCHC. The main SP from the CHC are chain alkanes and cyclanes, while that from the NCHC is rich in arenes and oxygen-containing organic compounds. The results indicate that Ni-Mg 2 Si/γ-Al 2 O 3 effectively catalyze the hydrocracking of >C alk –O– linkages and the hydrogenation of aromatic rings in E and ER.
研究领域:
化学工程
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能源科学
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DOI
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
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2020
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IF 4.748
Fang-Jing Liu,Jia-Pei Guo,Guang-Hui Liu,Lei-Lei Bie,Yun-Peng Zhao,Zai-Xing Huang,Xian-Yong Wei
Lignites are promising candidates as feedstocks for producing chemicals rather than used as solid fuels. Herein, a mesoporous silica-coated Fe 3 O 4 supported magnetic solid base (MSB) was prepared for catalytic hydrocracking (CHC) of Xiaolongtan lignite (XL). The effect of reaction temperature on aromatic production through CHC was investigated. The results showed that the MSB with abundant mesoporous structures has strong basic sites and superparamagnetism, which can effectively enhance producing soluble portions and aromatics from hydrocracking of XL. Both the yields of the soluble portions and aromatics from CHC of XL increased with raising reaction temperature. The maximum yield of the soluble portions reached 78 wt% at 300 °C from CHC. Phenols are the main group component from CHC of XL at 300 °C, which could be mainly generated from the cleavage of C–O bridged bonds in XL. Both the yields of phenols and arenes from CHC at 300 °C are twice more than those from CHC. It was proposed that the MSB could catalyze splitting H 2 to release active H − and facilitate H − transfer to cleave the C–O bridged bonds, resulting in producing higher yields of aromatics.
研究领域:
化学工程
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能源科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
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IF 3.779
Z.H. Tan,L.Z. Ouyang,J.M. Huang,J.W. Liu,H. Wang,H.Y. Shao,M. Zhu
A convenient, high-density and low-cost hydrogen supply technology is essential to hydrogen energy system by providing hydrogen to fuel cell component. Magnesium silicide (Mg 2 Si) can be a good hydrolysis candidate due to its low cost and ability of releasing hydrogen gas during hydrolysis process. However, previous studies have demonstrated that Mg 2 Si could easily produce large amount of silanes during hydrolysis reaction, which may cause serious problem of explosive danger when in contact with air. Here it is the first time that Mg 2 Si was used for generation of hydrogen by a simple and convenient one-step hydrolysis reaction. In this study, hydrolysis kinetics and mechanisms of Mg 2 Si in NH 4 Cl and NH 4 F solutions were investigated. The silanes could be almost completely turned into hydrogen by introduction of fluorine ion during the hydrolysis reaction of Mg 2 Si, leading to very low silanes content in the produced hydrogen. The kinetic studies indicated that when the concentration of the NH 4 F solution increased to 13.0%, the hydrogen generation rate and the reaction yield were improved significantly and reached the best performance, producing 466 mL g −1 H 2 in 10 min and 616 mL g −1 H 2 in 30 min at 25 °C. The activation energy was calculated to be 37.3 ± 0.8 kJ mol −1 . Furthermore, the hydrogen yield and the hydrolysis rate of Mg 2 Si can be further improved by high-energy ball milling. After ball milling for 2 and 5 h, the hydrogen generation yield in 30 min increased to 698 and 771 mL g −1 , respectively, and the activation energy was decreased to 23.9 ± 0.6 kJ mol −1 and 12.9 ± 0.1 kJ mol −1 , respectively. The results revealed that NH 4 F can be a promising reagent for promoting the hydrolysis of Mg 2 Si for onsite hydrogen supply.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
FUEL
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2018
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IF 4.908
Min Zhang,Xian-Yong Wei,Zheng Yang,Dao-Guang Teng,Yan Xue,De-Wu Meng,Zhi-Min Zong
A highly active magnetic solid superbase (MSSB) was prepared by impregnating Mg 2 Si onto γ-Al 2 O 3 -coated ferroferric oxide nanoparticles via one-pot synthesis method and successfully applied in the catalytic hydroconversion (CHC) of the extraction residue (ER) from Naomaohu lignite. Large amounts of chain alkanes and arenes were detected in the soluble portion (SP) from the non-catalytic hydroconversion of the ER, while oxygen-containing organic compounds are predominant in the SP from the CHC of the ER, indicating that MSSB catalyzes the cleavage of C O bridged bonds in the ER. Oxybis(methylene)dibenzene was used as the lignite-related model compound to evaluate the catalytic activity of MSSB. The results show that MSSB facilitates heterolytically splitting H 2 to release H − and subsequent H − transfer, leading to the cleavage of C O bridged bonds.
研究领域:
化学工程
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能源科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）