INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2016
·
IF 3.205
Kangkang Yang,Qilu Yao,Wei Huang,Xiangshu Chen,Zhang-Hui Lu
In this work, a series of Ni 1-x M x (M = Cr, Mo, W) nanoparticles (NPs) have been successfully synthesized via a simple surfactant-aided co-reduction method and employed as highly efficient and cost effective catalysts for hydrogen generation from aqueous solution of ammonia borane (NH 3 BH 3 , AB) at room temperature . It is found that the as-synthesized NiM NPs (M = Cr, Mo, W) exhibit much higher catalytic performance for the hydrolysis of AB as compared to that of pure Ni NPs. In addition, among all the Ni 1-x M x (M = Cr, Mo, W) NPs, the Ni 0.9 Cr 0.1 , Ni 0.9 Mo 0.1 , and Ni 0.8 W 0.2 NPs show the highest catalytic activities with the turnover frequency (TOF) values of 10.7, 27.3 and 25.0 mol H 2 (mol metal min) −1 , respectively. Remarkably, these optimized NiM catalysts can also perform efficiently in the hydrolysis of hydrazine borane (N 2 H 4 BH 3 , HB). The present low-cost and high-performance of the NiM catalysts system may encourage the practical application of AB and HB as the promising chemical hydrogen storage materials .
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2015
·Vol. 5
·期 1
·1-11
·
IF 5.578
Yao Qilu,Lu Zhang-Hui,Yang Kangkang,Chen Xiangshu,Zhu Meihua
Ultrafine ruthenium nanoparticles (NPs) within the mesopores of the SBA-15 have been successfully prepared by using a “double solvents” method, in which n -hexane is used as a hydrophobic solvent and RuCl 3 aqueous solution is used as a hydrophilic solvent. After the impregnation and reduction processes, the samples were characterized by XRD, TEM, EDX, XPS, N 2 adsorption-desorption and ICP techniques. The TEM images show that small sized Ru NPs with an average size of 3.0 ± 0.8 nm are uniformly dispersed in the mesopores of SBA-15. The as-synthesized Ru@SBA-15 nanocomposites (NCs) display exceptional catalytic activity for hydrogen generation by the hydrolysis of ammonia borane (NH 3 BH 3 , AB) and hydrazine borane (N 2 H 4 BH 3 , HB) at room temperature with the turnover frequency (TOF) value of 316 and 706 mol H 2 (mol Ru min) −1 , respectively, relatively high values reported so far for the same reaction. The activation energies ( E a ) for the hydrolysis of AB and HB catalyzed by Ru@SBA-15 NCs are measured to be 34.8 ± 2 and 41.3 ± 2 kJ mol −1 , respectively. Moreover, Ru@SBA-15 NCs also show satisfied durable stability for the hydrolytic dehydrogenation of AB and HB, respectively.
研究领域:
纳米催化
·
能源材料
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无机化学
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氢气储存与释放
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多相催化
✓ 已验证
DOI
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 14
·4466
·
IF 4.927
Xue Li,Jun Wu,Fan Fang,Hongping Li,Lei Wang,Hui Wan,Guofeng Guan
Based on the acid–base neutralization, the (1-methylimidazolium)(tetrazol-1-yl)borane was successfully synthesized by taking advantage of the acidity of the tetrazole and the basicity of the 1-methylimidazole borane complex. Through HRMS, NMR, and FT−IR, the structure of synthetic compounds was characterized in detail. Concerning about the (1-methylimidazolium)(tetrazol-1-yl)borane, it had an ignition−delay time of about 25 ms and a density specific impulse over 351 s·g/cm3, making it a suitable candidate for green hypergolic fuels. Moreover, it also demonstrated that introducing tetrazole into the borane could be an appropriate strategy to adjust the performance of the energy of those borane compounds.Keywords:borane;azole;hypergolic fuel;acid–base neutralization
研究领域:
化学
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材料科学
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能源研究
✓ 已验证
DOI
PubMed
高影响因子
BMC PLANT BIOLOGY
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2022
·Vol. 22
·期 1
·1-14
·
IF 5.26
Cheng Pengfei,Feng Liying,Zhang Shuoyu,Li Longna,Guan Rongzhan,Long Weihua,Xian Zhihui,Zhang Jiefu,Shen Wenbiao
Background Cold stress adversely influences rapeseeds ( Brassica napus L.) growth and yield during winter and spring seasons. Hydrogen (H 2 ) is a potential gasotransmitter that is used to enhance tolerance against abiotic stress, including cold stress. However, convenience and stability are two crucial limiting factors upon the application of H 2 in field agriculture. To explore the application of H 2 in field, here we evaluated the role of ammonia borane (AB), a new candidate for a H 2 donor produced by industrial chemical production, in plant cold tolerance. Results The application with AB could obviously alleviate the inhibition of rapeseed seedling growth and reduce the oxidative damage caused by cold stress. The above physiological process was closely related to the increased antioxidant enzyme system and reestablished redox homeostasis. Importantly, cold stress-triggered endogenous H 2 S biosynthesis was further stimulated by AB addition. The removal or inhibition of H 2 S synthesis significantly abolished plant tolerance against cold stress elicited by AB. Further field experiments demonstrated that the phenotypic and physiological performances of rapeseed plants after challenged with cold stress in the winter and early spring seasons were significantly improved by administration with AB. Particularly, the most studied cold-stress response pathway, the ICE1-CBF-COR transcriptional cascade, was significantly up-regulated either. Conclusion Overall, this study clearly observed the evidence that AB-increased tolerance against cold stress could be suitable for using in field agriculture by stimulation of H 2 S signaling.
研究领域:
植物学
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农业科学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 50
·期 3
·1060-1068
·
IF 4.174
Run-Ze Yuan,Peng-Fei Cui,Shu-Ting Guo,Guo-Xin Jin
Herein, we describe the synthesis of tetraphenylphosphonium o-carboranyl dithiocarboxylate (Ligand 1) and methyldithiocarboxyl-o-carborane (Ligand 2). The complexes [Cp*M(o-C2B10H11CS2)Cl] (M = Ir (3); Rh (4)) and [Cp*M(o-C2B10H11CS2)2] (M = Ir (5); Rh (6)) have been synthesized based on Ligand 1. The selective B–H bond activation of Ligand 2 has also been explored, leading to the synthesis of the B–H activated complex [Cp*Ir(o-C2B10H10CS2CH3)Cl] (7) and four of its substituted derivatives (8, 9, 10 and 11). All of these compounds have been characterised through single-crystal X-ray diffraction, NMR, IR spectroscopy and elemental analysis.
研究领域:
无机化学
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配位化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 28
·
IF 1.768
Yumeng Luo,Yafei Lu,Ning Li,Yun Li,Xiaoa Zhang,Shicheng Qi
Novel segmented carborane-containing polyurethane (PUR 2–5) is synthesized from hydroxyl-terminated carborane-containing prepolymer (P3) as soft segment and isocyanate-terminated carborane-containing prepolymer (P5) as hard segment by different ratio of P3 and P5. The prepared carborane-containing polyarylesters and polyurethanes (PURs) are characterized by Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance spectroscopy (NMR). Their mechanical properties and thermal stability are measured, while the dosage of carborane biphenol is 5–10 wt %, the tensile strength is up to 20 MPa, and thermal gravimetric analyzer (TGA) curves indicate that the carborane group effectively reduces the degradation rate of carborane-containing polyurethane, which is fairly stable above 300°C and with char yield exceeding 40%. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42227.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 50
·35562-35568
·
IF 3.9
Fenglong Wu,Jin Song
Herein, we synthesized a hydrophilic support formed from amorphous Cr2O3 and KIT-6 containing P123 using a simple solvent-free thermal method for Co species. The obtained catalyst (denoted as Co/Cr2O3-F-X) exhibits high activity for hydrogen production from ammonia borane (NH3BH3). The optimal Co/Cr2O3-F-0.5 exhibits the highest catalytic performance with the turnover frequency (TOF) value of 111.1 min−1. Advanced characterizations suggest the high catalytic performance is attributed to the synergistic effect of the strong interaction between amorphous Cr2O3 and KIT-6 containing P123 and improved wettability of the catalyst.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2021
·
IF 4.354
Hao Song,Yao Xiao,Zhuohua Zhang,Wanjin Xiong,Ren Wang,Liangcheng Guo,Taigang Zhou
A simple and efficient copper-catalyzed selective transfer hydrogenation of nitriles to primary amine-boranes and secondary amines with an oxazaborolidine–BH3 complex is reported. The selectivity control was achieved under mild conditions by switching the solvent and the copper catalysts. More than 30 primary amine-boranes and 40 secondary amines were synthesized via this strategy in high selectivity and yields of up to 95%. The strategy was applied to the synthesis of 15N labeled in 89% yield.
研究领域:
有机化学
·
催化化学
✓ 已验证
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2021
·
IF 3.605
Yunfei Yan,Jianbo Li,Tao Jia,Haojie Li,Kaiming Shen,Ziqiang He
TiO2-based photocatalysts are promising materials that show great potential in the field of catalysis due to their excellent properties including nontoxicity, high photocatalytic performance, and outstanding thermal and chemical stability. However, several challenges exist regarding TiO2 applications for catalytic hydrogen production. In this work, Fe- and graphene-comodified TiO2 (Fe–rGO/TiO2) was synthesized via a two-step solvothermal method. In addition, the effect of Fe3+ and graphene addition upon the catalytic performance of TiO2 was investigated based on the ammonia borane hydrogen production reaction, and the catalysts were characterized by SEM, XRD, XPS, UV–vis, FT-IR, and Raman methods. Batch experiments showed that the synthesized Fe–rGO/TiO2 composites exhibited high photocatalytic performance for hydrogen production from ammonia borane under visible-light irradiation. Moreover, the highest photocatalytic hydrogen production rate (1235.32 μmol·min–1·gcat–1) of 2%Fe–1%rGO/TiO2 was observed under visible-light irradiation at 25 °C, and the photocatalytic activity of the sample remained almost unchanged after the fifth cycle. The XRD, XPS, FT-IR, and Raman analyses showed that Fe and graphene successfully modified TiO2 and the presence of Ti4+. In addition, the extended visible-light absorption range and a reduction of the band gap of Fe–rGO/TiO2 were demonstrated by UV–vis diffuse reflectance spectra and calculation of the band gap. Also, the preparation of hydrogen from the hydrolysis of ammonia borane photocatalyzed by TiO2 composites was discussed. These findings are crucial for designing TiO2-based photocatalysts with high performance for photocatalytic hydrogen production.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Junhong Luo,Jinchuan Wang,Xingwen Feng,Jinguang Cai,Weizhi Yao,Jiangfeng Song,Changan Chen,Deli Luo
In this paper, we report an in-depth study of the post-milled 4AB/Mg 2 NiH 4 sample, with a special focus on the promoting mechanism of Mg 2 NiH 4 on the dehydrogenation of AB. A combination of X-ray diffraction (XRD), Fourier transformation infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) characterizations, together with selective isotopic labelling and other designed experiments, revealed that AB and Mg 2 NiH 4 react with each other from the starting phase of the dehydrogenation process, which eventually results in the formation of Mg Ni B N H complexes. On the other hand, it was found that the reaction between AB and Mg 2 NiH 4 cannot proceed directly, but requires phase transition of normal AB to its mobile phase AB* to occur first. Hence, the promoting mechanism of Mg 2 NiH 4 on the dehydrogenation of AB is attributed to its promoting effect on phase transition of normal AB to AB* under mild conditions and in particular its chemical modification of AB with Mg and Ni.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Energy & Environmental Materials
·
2021
·Vol. 6
·期 1
·e12292
·
IF 15.122
Ruofan Shen,Yanyan Liu,Hao Wen,Xianli Wu,Zhikun Peng,Sehrish Mehdi,Tao Liu,Huanhuan Zhang,Shuyan Guan,Erjun Liang,Baojun Li
The dissociation of water is the rate-determining step of several energy-relating reactions due to high energy barrier in homolysis of H-O bond. Herein, engineering vacancy-atom ensembles via injecting oxygen vacancy (V O ) into single facet-exposed TiO 2 -Pd catalyst to form V O -Pd ensemble is proposed and implemented. The outstanding activity of as-prepared catalyst, 1.5-PdTV O , toward water dissociation is established with a turnover frequency of 240 min −1 in ammonia borane hydrolysis at 298 K. Density functional theory simulation suggests that the V O -Pd ensemble is responsible for the high intrinsic catalytic activity. Water molecules tend to be dissociated on V O sites and ammonia borane molecules on Pd atoms. Those H atoms from water dissociation on V O combine with H atoms from ammonia borane on Pd atoms to generate H 2 . This insights into engineering vacancy-atom ensembles catalysis provide a new avenue to design catalytic materials for important energy chemical reactions.
研究领域:
材料科学
·
催化化学
·
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
Yang Luo,Yao Tian,Shiyu Yang,Jing Jiang,Aike Liu,Hejun Gao,Lunhong Ai
Efficient and controllable release of hydrogen from solid hydrogen storage materials is a promising way to produce hydrogen safely and on-demand. The development of economical, highly active, easily recyclable catalysts is critical for practical applications, which remains a great challenging. Herein, the easily controllable and cost-effective corrosion strategy is ingeniously developed to simply prepare ultralow-content ruthenium coupled with nickel hydroxide on nickel foam (Ru–Ni–NF). After experiencing the spontaneous oxidation-reduction reactions between the reactive NF and Ru 3+ , ultrafine Ru nanoparticles decorated nickel hydroxide nanosheets are in situ intimately grown on porous NF networks. The optimal Ru–Ni–NF catalyst exhibits the excellent performance for catalytic hydrolysis of ammonia borane with a high turnover frequency (TOF) of 539.6 mol H2 mol Ru −1 min −1 at 298 K and a low apparent activation energy of 36.4 kJ mol −1 , due to the synergistic effect between Ru nanoparticles and nickel hydroxide nanosheets. Furthermore, the Ru–Ni–NF catalyst possesses easy separation and outstanding durability, which is superior to powdered catalysts. This study provides a facile and economical strategy for the preparation of ultralow-content noble metal supported metal foam-type catalysts for dehydrogenation of ammonia borane.
研究领域:
材料科学
·
催化化学
✓ 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）