Search results for: Lixian Sun

Items from 1 to 20 out of 105 results

article

Inducing One‐Step Dehydrogenation of Magnesium Borohydride via Confinement in Robust Dodecahedral Nitrogen‐Doped Porous Carbon Scaffold (Adv. Mater. 40/2024)

Yuxiao Jia, Bo Han, Jianchuan Wang, Sicheng Yuan, more

Advanced Materials > 36 > 40 > n/a - n/a

Porous Carbon Scaffolds A dodecahedral activated N‐doped porous carbon scaffold is synthesized and used for the nanoconfinement of Mg(BH₄)₂. Precise activation control enables a transformation from microporous carbon materials to mesoporous ones with extremely high specific surface area and pore volume, and hence the efficient nanoconfinement of Mg(BH₄)₂, realization of one‐step dehydrogenation and...

article

Inducing One‐Step Dehydrogenation of Magnesium Borohydride via Confinement in Robust Dodecahedral Nitrogen‐Doped Porous Carbon Scaffold

Yuxiao Jia, Bo Han, Jianchuan Wang, Sicheng Yuan, more

Advanced Materials > 36 > 40 > n/a - n/a

A dodecahedral activated N‐doped porous carbon scaffold is synthesized and used for the nanoconfinement of Mg(BH₄)₂. The optimized mesoporous scaffold possesses an accumulated pore width of 2.65 nm, high specific surface area (3955.9 m² g⁻¹), and large pore volume (2.15 cm³ g⁻¹), providing ample space for the confinement of Mg(BH₄)₂ particles and numerous surface active sites for interactions with...

article

Interfacial Domino Effect Triggered by β‐Alanine Cations Realized Highly Reversible Zinc‐Metal Anodes

Gaozhi Guo, Chenchen Ji, Jiadong Lin, Tianlong Wu, more

Angewandte Chemie International Edition > 63 > 33 > n/a - n/a

Realizing durative dense, dendrite‐free, and no by‐product deposition configuration on Zn anodes is crucial to solving the short circuit and premature failure of batteries, which is simultaneously determined by the Zn interface chemistry, electro‐reduction kinetics, mass transfer process, and their interaction. Herein, this work unmasks a domino effect of the β‐alanine cations (Ala⁺) within the hydrogel...

article

Interfacial Domino Effect Triggered by β‐Alanine Cations Realized Highly Reversible Zinc‐Metal Anodes

Gaozhi Guo, Chenchen Ji, Jiadong Lin, Tianlong Wu, more

Angewandte Chemie > 136 > 33 > n/a - n/a

article

Zincophilic Anionic Hydrogel Electrolyte with Interfacial Specific Adsorption of Solvation Structures for Durable Zinc Ion Hybrid Supercapacitors

Gaozhi Guo, Chenchen Ji, Hongyu Mi, Chao Yang, more

Advanced Functional Materials > 34 > 2 > n/a - n/a

The rechargeable zinc ion hybrid supercapacitors (ZHSCs) are critically hindered by the low Coulombic efficiency and poor lifespan due to the continuous water‐induced side reactions and uncontrolled dendrite growth of the Zn anode. Herein, a zincophilic anionic hydrogel electrolyte (PSCA/Zn(OTf)₂) is constructed by incorporating the dodecyl sulfate anions ((OSO₃R)⁻) micelles to manipulate the solvation...

article

Tetrabutylammonium Bromide Functionalized Ti₃C₂T_x MXene as Versatile Cathode Buffer Layer for Efficient and Stable Inverted Perovskite Solar Cells

Ping Cai, Ling Ding, Ziming Chen, Dianhui Wang, more

Advanced Functional Materials > 33 > 30 > n/a - n/a

2D Ti₃C₂T_x MXene, possessing facile preparation, high electrical conductivity, flexibility, and solution processability, shows good application potential for enhancing device performance of perovskite solar cells (PVSCs). In this study, tetrabutylammonium bromide functionalized Ti₃C₂T_x (TBAB‐Ti₃C₂T_x) is developed as cathode buffer layer (CBL) to regulate the PCBM/Ag cathode interfacial property for...

article

Enhanced Hydrogen Storage Properties of LiAlH₄ by Excellent Catalytic Activity of XTiO₃@h‐BN (X = Co, Ni)

Sheng Wei, Jiaxi Liu, Yongpeng Xia, Huanzhi Zhang, more

Advanced Functional Materials > 32 > 13 > n/a - n/a

The high desorption temperature and slow kinetics still restrict the applications of LiAlH₄ in hydrogen storage. To solve the above problems, NiTiO₃@h‐BN and CoTiO₃@h‐BN prepared for the first time are introduced into LiAlH₄ by ball milling. LiAlH₄ doped with 7 wt% NiTiO₃@h‐BN, selected as an optimal doping sample, starts to release hydrogen at 68.1 °C, and the total amount of hydrogen released is...

article

A Versatile Approach to Boost Oxygen Reduction of Fe‐N₄ Sites by Controllably Incorporating Sulfur Functionality

Chunfeng Shao, Lingmin Wu, Haocheng Zhang, Qike Jiang, more

Advanced Functional Materials > 31 > 25 > n/a - n/a

Although atomically dispersed Fe‐N₄ on carbon materials (Fe‐NC) have enormous potential for the oxygen reduction reaction (ORR), precise control over the electronic structure of Fe to enhance the catalytic performance and a full understanding of the catalytic mechanism remain elusive. Herein, a novel approach is designed to boost the kinetic activity of single Fe‐N₄ centers by controlling S‐doped...

article

Nanostructured Cobalt‐Based Electrocatalysts for CO₂ Reduction: Recent Progress, Challenges, and Perspectives

Zhangsen Chen, Gaixia Zhang, Lei Du, Yi Zheng, more

Small > 16 > 52 > n/a - n/a

CO₂ reduction reaction (CO₂RR) provides a promising strategy for sustainable carbon fixation by converting CO₂ into value‐added fuels and chemicals. In recent years, considerable efforts are focused on the development of transition‐metal (TM)‐based catalysts for the selectively electrochemical CO₂ reduction reaction (ECO₂RR). Co‐based catalysts emerge as one of the most promising electrocatalysts...

article

A facile one-pot method to prepare nitrogen and fluorine co-doped three-dimensional graphene-like materials for supercapacitors

Diancheng Duan, Fang Hu, Jiaojun Ma, Hongliang Peng, more

Journal of Materials Science: Materials in Electronics > 2019 > 30 > 21 > 19505- 19512

Nitrogen and fluorine co-doped three-dimensional(3D) graphene-like material, MP-700, is successfully prepared using a one-pot method by directly pyrolyzing melamine and PTFE in N₂ flow. This 3D graphene-like material has a high specific surface area (1309 m² g⁻¹) and the N and F contents are is 19.03 and 0.41 at.%, respectively. Furthermore, it shows the high specific capacitance of 230 F g⁻¹ at 0...

article

Preparation and thermal performances of microencapsulated phase change materials with a nano-Al₂O₃-doped shell

Sheng Wei, Zhijun Duan, Yongpeng Xia, Chaowei Huang, more

Journal of Thermal Analysis and Calorimetry > 2019 > 138 > 1 > 233-241

High-performance phase change materials (PCMs) are regarded as a promising strategy in thermal energy storage applications. However, pure PCMs exhibit some inherent disadvantages such as leakage, low thermal conductivity and poor thermal cycling stability. Herein, this work presents novel microencapsulated PCMs with nano-Al₂O₃-enhanced shell materials due to the high thermal conductivity and mechanical...

article

Two dimensional holey carbon nanosheets assisted by calcium acetate for high performance supercapacitor

Chenglong Cai, Qingli Sui, Zhe She, Heinz-Bernhard Kraatz, more

Electrochimica Acta > 2018 > 283 > C > 904-913

Nanostructured carbon materials are the first preference for fabricating electrodes as they have intrinsic conductivity, excellent chemical stability and high surface area. In this report, a novel two dimensional (2D) holey carbon nanosheet was prepared by pyrolysis of a composite of resorcinol–formaldehyde resin (RF) and calcium acetate (CA), followed by acid etching and base activation. The results...

article

Effect of Pd overlayer and mixed gases on hydrogen permeation of Pd/Nb30Hf35Co35/Pd composite membranes

Erhu Yan, Haoran Huang, Ruonan Min, Ping Zhao, more

International Journal of Hydrogen Energy > 2018 > 43 > 31 > 14466- 14477

Effect of Pd overlayer and mixed gases on hydrogen permeation of Pd/Nb₃₀Hf₃₅Co₃₅/Pd composite membranes was investigated. The diameter of Pd particle increases with increasing sputtering power. With this change, the membrane shows a signification reduction in hydrogen permeability/or flux, but its durability and stability increases significantly, which can be mainly attributed to a decrease in hydrogen...

article

Cobalt(II) coordination polymers as anodes for lithium-ion batteries with enhanced capacity and cycling stability

Yumei Luo, Lixian Sun, Fen Xu, Siyue Wei, more

Journal of Materials Science & Technology > 2018 > 34 > 8 > 1412-1418

Coordination polymer Co-btca (H₄btca = 1,2,4,5-benzenetetracarboxylic acid) was synthesized using a simply hydrothermal method. In particular, the as-prepared Co-btca was applied as an anode material for lithium-ion battery for the first time. Single crystal X-ray diffraction results indicated that the as-prepared Co-btca displayed unique layer structure, which was beneficial to transport Li ions...

article

Enhanced thermal diffusivity and dehydrogenation of 2LiNH2MgH2 by doping with super activated carbon

Shujun Qiu, Wei Gao, Xingyu Ma, Hailiang Chu, more

International Journal of Hydrogen Energy > 2018 > 43 > 30 > 13975- 13980

Doping with the additives in metal-N–H system has been regarded as one of the most effective approaches to improve its hydrogen storage properties. Herein, we prepared super activated carbon (SuperC) through the activation of commercial activated carbon by KOH and evaluated its effect on dehydrogenation properties of 2LiNH₂MgH₂. Our studies show that doping with SuperC could effectively lower its...

article

Iron‐Mediated Azidomethylation or Azidotrideuteromethylation of Active Alkenes with Azidotrimethylsilane and Dimethyl Sulfoxide

Rui Zhang, Haifei Yu, Zejiang Li, Qinqin Yan, more

Advanced Synthesis & Catalysis > 360 > 7 > 1384 - 1388

A radical azidomethylation of various alkenes with azidotrimethylsilane and dimethyl sulfoxide has been achieved under mild reaction conditions, and the method efficiently introduces common and valuable azide and methyl groups into organic compounds. It offers a convenient method for preparing organic azides, which can be easily transformed into related amine derivatives and N‐heterocycles. Control...

article

Inducement of nanoscale Cu–BTC on nanocomposite of PPy–rGO and its performance in ammonia sensing

Ying Yin, Haitao Zhang, Pengru Huang, Cuili Xiang, more

Materials Research Bulletin > 2018 > 99 > C > 152-160

In this study, polypyrrole-nanofiber-coated reduced graphene oxide (PPy–rGO) was decorated with nanoparticles of Cu–BTC [Cu₃(BTC)₂(H₂O)₃, where BTC is short for benzene-1,3,5-tricarboxylate], a typical metal–organic framework, via a hydrothermal process combined with in situ chemical polymerization. The Cu–BTC nanoparticles enabled gas capture because of their large surface area and high affinity...

article

Theoretical studies of π-electron delocalization and localization on intramolecular proton transfer in the ground state

Hongliang Peng, Pengru Huang, Pinggui Yi, Fen Xu, more

Journal of Molecular Structure > 2018 > 1154 > C > 590-595

Proton transfer processes of 15 benzimidazole compounds are studied by density functional theory methods, and natural orbital energy index (NOEI) is introduced. Here, NOEI and nucleus independent chemical shift (NICS) are applied to estimate the π-electron localization and delocalization, respectively. Proton transfer potential energy surfaces are calculated to explore these processes, and the results...

article

A pyridine vapor sensor based on metal-organic framework-modified quartz crystal microbalance

Fen Xu, Lixian Sun, Pengru Huang, Yujia Sun, more

Sensors and Actuators B: Chemical > 2018 > 254 > C > 872-877

A novel pyridine vapor sensor has been prepared by modifying the Quartz crystal microbalance (QCM) with nanoscale metal-organic framework (NMOF, named as Al(OH)(1,4-NDC)). The preparation conditions for the sensor were optimized. Improved sensing performance was achieved by using dichloromethane (CH₂Cl₂) instead of N,N-dimethylformamide (DMF) to disperse the NMOF on the QCM. In addition, the sensor’s...

article

Hydrogen generation of a novel AlNaMgH3 composite reaction with water

Fen Xu, Xiangfei Zhang, Lixian Sun, Fang Yu, more

International Journal of Hydrogen Energy > 2017 > 42 > 52 > 30535- 30542

A novel hydrogen generation material with a high capacity of H₂ release had been successfully prepared by ball milling both NaMgH₃ and Al powder. The performances of H₂ generation of the material and effects of metals, salts or complex hydrides on this material are explored. The action mechanism of NaMgH₃, Bi and Li₃AlH₆ on AlH₂O reaction is investigated by means of XRD and calorimeter. The results...

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INFONA - science communication portal

Search results for: Lixian Sun

Inducing One‐Step Dehydrogenation of Magnesium Borohydride via Confinement in Robust Dodecahedral Nitrogen‐Doped Porous Carbon Scaffold (Adv. Mater. 40/2024)

Inducing One‐Step Dehydrogenation of Magnesium Borohydride via Confinement in Robust Dodecahedral Nitrogen‐Doped Porous Carbon Scaffold

Interfacial Domino Effect Triggered by β‐Alanine Cations Realized Highly Reversible Zinc‐Metal Anodes

Interfacial Domino Effect Triggered by β‐Alanine Cations Realized Highly Reversible Zinc‐Metal Anodes

Zincophilic Anionic Hydrogel Electrolyte with Interfacial Specific Adsorption of Solvation Structures for Durable Zinc Ion Hybrid Supercapacitors

Tetrabutylammonium Bromide Functionalized Ti₃C₂T_x MXene as Versatile Cathode Buffer Layer for Efficient and Stable Inverted Perovskite Solar Cells

Enhanced Hydrogen Storage Properties of LiAlH₄ by Excellent Catalytic Activity of XTiO₃@h‐BN (X = Co, Ni)

A Versatile Approach to Boost Oxygen Reduction of Fe‐N₄ Sites by Controllably Incorporating Sulfur Functionality

Nanostructured Cobalt‐Based Electrocatalysts for CO₂ Reduction: Recent Progress, Challenges, and Perspectives

A facile one-pot method to prepare nitrogen and fluorine co-doped three-dimensional graphene-like materials for supercapacitors

Preparation and thermal performances of microencapsulated phase change materials with a nano-Al₂O₃-doped shell

Two dimensional holey carbon nanosheets assisted by calcium acetate for high performance supercapacitor

Effect of Pd overlayer and mixed gases on hydrogen permeation of Pd/Nb30Hf35Co35/Pd composite membranes

Cobalt(II) coordination polymers as anodes for lithium-ion batteries with enhanced capacity and cycling stability

Enhanced thermal diffusivity and dehydrogenation of 2LiNH2MgH2 by doping with super activated carbon

Iron‐Mediated Azidomethylation or Azidotrideuteromethylation of Active Alkenes with Azidotrimethylsilane and Dimethyl Sulfoxide

Inducement of nanoscale Cu–BTC on nanocomposite of PPy–rGO and its performance in ammonia sensing

Theoretical studies of π-electron delocalization and localization on intramolecular proton transfer in the ground state

A pyridine vapor sensor based on metal-organic framework-modified quartz crystal microbalance

Hydrogen generation of a novel AlNaMgH3 composite reaction with water

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