INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2011
·Vol. 36
·期 14
·8203-8208
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IF 4.057
Z.G. Zhang,H. Wang,M. Zhu
The major challenge of complex hydride for hydrogen storage is to release hydrogen at a moderate temperature with rapid kinetics. This paper reports a new composite system (NaBH 4 /ZnF 2 ) to generate hydrogen at a low temperature below 100 °C. The NaBH 4 and ZnF 2 mixture was prepared by a mechanical milling in a 2:1 M ratio. Dehydrogenation of the mixture during a heating process shows that the initial dehydrogenation temperature was below 100 °C with favorable kinetics. The structural analysis confirmed the formation of NaBF 4 and Zn in the reaction products. The study concerning the reaction mechanism reveals that ZnF 2 plays a role of reagent rather than catalyst. The produced intermediate of NaZnF 3 , however, affects the decomposition of the emitted B 2 H 6 . This work suggests that the extension of the decomposition mechanism of NaBH 4 /ZnF 2 composite system would favor the development of new catalysts for complex hydride systems.
研究领域:
材料科学
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能源化学
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无机化学
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储氢技术
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纳米催化
✓ 已验证
DOI
高影响因子
Energy Storage Materials
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2023
·
IF 20.4
Zhengtai Zha,Tianjiang Sun,Diantao Li,Tao Ma,Weijia Zhang,Zhanliang Tao
The issues of serious corrosion and dendrite growth in electrode surface hinder the commercialization of aqueous zinc batteries . A stable solid electrolyte interphase (SEI) on electrode surface is critical to improve electrochemical performance of Zn anode. Here, a novel zwitterion additive as an electrical double layer (EDL) regulator with SEI-forming capability is developed. The zwitterion exhibits preferential adsorption with Zn anode to construct a fast Zn 2+ migration channel. More importantly, a ZnF 2 SEI layer can be in-situ generated on the anode due to preferential electroreduction of zwitterion, which isolates Zn anode from electrolytes. Therefore, the symmetric cells with the proposed electrolyte survive long cycling stability over 600 h at 10 mA cm −2 and 10 mAh cm −2 . The merits of zwitterion additive are further demonstrated in the Zn||V 2 O 5 · n H 2 O full cell with a capacity retention of ∼80 % after 1000 cycles.
研究领域:
电化学
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储能
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材料科学
·
电池技术
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Fan Shi,Shuangyi Yuan,Ranran Hu,Hang Xiao,Shaolu Zhang,Chenyang Wang,Xiangtong Zhang,Huaibin Shen
Indium phosphide (InP)-based quantum dots (QDs) have emerged as a promising alternative to cadmium-containing QDs for photonic applications. Nonetheless, the evolution of the synthesis chemistry for InP-based QDs poses a significant challenge, particularly with regard to morphological control. This study demonstrates efficient morphological control of square and spherical green-emissive InP/ZnSe/ZnS QDs. The formation of square-shaped QDs is attributed to the fluoride-induced suppression of {111} facet growth, which promotes shell growth along the {100} facets. Conversely, spherical QDs emerge owing to weak suppression of {111} facet growth. The fluoride is derived from the reaction between ZnF2 powder and oleic acid. It has been demonstrated that coordination between TOP and oleic acid effectively impedes this reaction. Beyond photoluminescence, the QDs exhibit strong and narrow radioluminescence (RL) at 565 nm with a full width at half maximum (FWHM) of 42 nm under X-ray excitation with a light yield of 4.2 × 103 photons/MeV. A QD X-ray imaging film was demonstrated to successfully visualize the internal components of opaque objects. This work demonstrates a ligand-mediated strategy for the morphological control of InP-based QDs and highlights their potential for X-ray imaging.
研究领域:
纳米材料
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量子点
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X射线成像
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合成化学
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光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2025
·Vol. 12
·期 16
·4804-4811
·
IF 6.4
Liang Ma,Yi-Lei Lv,Bing-Wei Miao,Guo-Ren Zhu,Wenlong Liu,Sheng-Ping Guo,Ru-Ling Tang
Short-wave ultraviolet optical crystals are widely used in various fields. Exploring organic–inorganic hybrid compounds is an effective approach for discovering crystal materials that simultaneously possess large band gaps and birefringence. In this work, two novel organic–inorganic hybrid fluorosilicates, (C2H7N4O)2SiF6 and (C2H4N4)4ZnSiF6·H2O, were obtained. (C2H7N4O)2SiF6 has the largest band gap among organic–inorganic hybrid fluorosilicates and a unique [(C2H7N4O)2SiF6]∞ layered structure, while (C2H4N4)4ZnSiF6·H2O has the largest birefringence (0.282@0.546 μm) among reported organic–inorganic hybrid fluorosilicates. In addition, we systematically analyzed the structural and optical properties upon transformation from (C2H7N4O)2SiF6 to (C2H4N4)4ZnSiF6·H2O.
研究领域:
材料科学
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光学材料
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无机化学
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晶体工程
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·
IF 15.7
Wang Mingxu,Yang Jinyu,Ji Haoran,Li Ziyue,Wang Fengmei,Fang Fang,Ruan Jiafeng,Sun Dalin,Wang Fei
Sodium-ion batteries are promising as next-generation energy storage batteries, while suffer from the limited energy density. Initially anode-free sodium batteries effectively alleviate this predicament, but they are primarily hindered by uneven plating/stripping behavior, especially at high rates and low temperatures. Herein, we propose a fluorinated sodiophilic interphase towards high-rate and low-temperature initially anode-free sodium batteries. Systemically comparison between various interphase reveals that Na-alloying-metal containing interphase with high Na adsorption energy and low lattice mismatch facilitates uniform spherical Na plating under high current densities. Besides that, the in-situ formed sodium fluoride strengthens the mechanical properties of the interphase and regulates Na deposition. The optimized BiF 3 -derived interphase enables stable Na plating/stripping for over 2800 hours with an average Coulombic efficiency of 99.90%, high-rate capability at 20 mA cm −2 , and low-temperature adaptability at −30 °C. Coupled with Na 4 Fe 3 (PO 4 ) 2 P 2 O 7 positive electrode, initially anode-free full batteries deliver specific powers of 8257.5 W kg −1 at 25 °C and 486.9 W kg −1 at −30 °C (based on the mass of active materials). The assembled pouch-cell operate stably at a high rate of 7 C (1 C = 100 mA g −1 ). This work provides a strategic framework for advancing initially anode-free sodium battery technology.
研究领域:
电化学储能
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材料科学
·
能源化学
·
纳米材料
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界面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2026
·
IF 4.9
Wei Zhang,Rui Tong,Xiangmin Zhao,Wei Gao,Xue Wang,Xinhui Yang
Ga and F co-doped ZnO (GFZO) thin films were prepared on quartz substrates via the sol-gel spin-coating method, followed by annealing in O 2 , Ar, N 2 , and H 2 atmosphere. The effects of annealing atmosphere on the structure, optical transmission, electrical properties, and thermal stability of GFZO films were systematically investigated. All GFZO films exhibited a typical wurtzite structure with a c-axis preferential orientation. The average optical transmittance of GFZO films annealed in Ar, N 2 , and O 2 atmospheres exceeded 90% in the visible region, while that of the H 2 -annealed sample was about 60%. The resistivity values of GFZO films annealed in Ar, N 2 , and H 2 atmospheres ranged from 1×10 -3 to 3×10 -3 Ω·cm at room temperature, whereas the film annealed in O 2 showed a much higher resistivity of 7.887×10 5 Ω·cm. Notably, the GFZO thin films annealed in Ar or N 2 atmosphere can maintain a low resistivity of 8×10 -3 Ω·cm even at 500 °C while retaining excellent thermal stability. With high optical transmittance, low electrical resistivity, and outstanding thermal stability, the Ar and N 2 annealed GFZO thin films are highly suitable for transparent conductive thin film applications.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2026
·
IF 12.1
Yuan Zhong,Yi Li,Liangrui He,Yizhang Tang,Zhiwen Yang,Xujiang Yu,Jianhua Zhang,Wanwan Li
Quantum dot (QD)-based scintillators show promise for use as flexible X-ray imaging screens due to their high performance and scalable characteristics. However, conventionally used QD-based scintillators face severe limitations, including poor chemical stability and unavoidable toxic issues arising from heavy metals such as cadmium (Cd) or lead (Pb). Herein, a Cd/Pb-free liquid scintillator based on ZnSeTe-based core-shell QDs and an energy transfer donor molecule of 2,5-diphenyloxazole (PPO) is reported, which offers high efficiency and scalability. By adjusting the Te/Se ratios of ZnSeTe, an optimal balance between X-ray absorption and radioluminescence efficiency of ZnSeTe-based core-shell QDs is achieved, resulting in a blue-emitting scintillator with a light yield of 11 222 (±2%) photons MeV −1 beyond commercial Bi 3 Ge 4 O 12 . Furthermore, halogen passivation effectively eliminates trap states on the surface of ZnSeTe-based core-shell QDs, doubling the X-ray-excited fluorescence intensity. Consequently, the composite liquid scintillator, fabricated using PPO-composited ZnSeTe-based QDs, achieves a high light yield of 33 450 (±5%) photons MeV −1 and a low detection limit of 788.4 nGy s −1 . High-performance X-ray imaging with a spatial resolution of 6.7 line pairs (lp) mm −1 is achieved. This work introduces a novel approach for the development of eco-friendly QD-based scintillators with structural and optical modulation for high-performance X-ray imaging.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Guangtong Sun,Xinyu Wang,Wenbo Yu,Nina Pei,Wenjia Zhang,Luyang Sun,Pengfei Yue,Guoshang Zhang,Peixun Xiong,Qiongqiong Lu,Kexing Song
Sodium metal has attracted considerable interest as an anode for next-generation high-energy-density sodium-metal batteries, owing to its superior specific capacity, low electrochemical potential, and economic viability. Despite the advantages, sodium-metal anodes encounter critical challenges, such as side reactions and dendrite growth, which diminish Coulombic efficiency and compromise long-term cycling performance. In this work, a multifunctional artificial NaF-Zn hybrid interfacial layer is in situ formed on the sodium metal surface. Both NaF and Zn exhibit strong binding affinity for PF 6 − , which facilitates Na + desolvation and accelerates the formation of a homogeneous and NaF-rich solid-electrolyte interphase (SEI). The resulting homogeneous and mechanically stable SEI enhances Na ion transport, reduced the side reactions and suppresses the dendrite formation. Consequently, the symmetric cells based on NaF-Zn modified Na operate stably for 1900 h at a high current density of 3 mAh cm −2 , while the full cell with Na 3 V 2 (PO 4 ) 3 cathode maintains stability for 8000 cycles at a high rate of 20C with a capacity retention of 75%. Moreover, the full cell demonstrated outstanding stability even under extreme working conditions, including low temperatures of −20 °C, high cathode loading, and reduced N/P ratios.
研究领域:
储能
·
材料科学
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电化学
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电池技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Xiaobo Ding,Hailong Hu,Tailiang Guo,Fushan Li
InP quantum dots have received intensive attention due to their tunable emission wavelengths, narrow bandwidths, and high color purity. Nevertheless, InP quantum dots exhibit notable instability in a complex environment due to their highly oxidizable properties. In this study, we present a strategy for synthesizing InP@Al2O3 nanocomposites that have InP quantum dots evenly embedded in a hybrid substrate containing Al2O3 and coupling-interconnection layers of Si and Al. In addition, we used high-power UV irradiation to repair the defects generated during the synthesis process, leading to photoluminescence (PL) intensity increase of more than 10 times. InP@Al2O3 nanocomposites have demonstrated up to 9 h of laser stability, 30 days of water stability and acid stability and 20 days of alkali stability. It has far exceeded that of InP quantum dots and commercially available phosphors. Distal-type light-emitting diodes (LEDs) with stable and standard white emission can be realized by combining red and green InP@Al2O3 nanocomposites with blue LED chips.
研究领域:
材料科学
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光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Shengliang Qi,Kaixin Zhu,Ting Xu,Weiguang Ma,Xu Zong
High-entropy (HE) design provides ample opportunities for accessing catalysts with unique physiochemical properties for advanced energy and environmental applications. Although a variety of multi-cationic high-entropy materials (HEMs) have been identified, HEMs consisted of multiple cationic and anionic elements are still limited. Herein, we present the design and synthesis of a series of rutile-structured high-entropy oxyfluorides (HEOFs), including [RuO 2 ] x [MgMnZnCoF 2 ] y , [MnO 2 ] x [MgMnZnCoF 2 ] y , [MoO 2 ] x [MgMnZnCoF 2 ] y , [SnO 2 ] x [MgMnZnCoF 2 ] y and [TiO 2 ] x [MgMnZnCoF 2 ] y (x:y = 3:1, 2:1, 1:1). All the HEOFs are obtained through mechanochemical alloying rutile-structured oxide and fluoride precursors and the HEOFs inherit the crystal structures of the skeleton oxides. Moreover, the HEOFs exhibit enhanced electrocatalytic oxygen evolution reaction (OER) activity than the corresponding one-element precursors. Typically, the best-performed HEOF [RuO 2 ] 3 [MgMnZnCoF 2 ] 1 catalyst requires an overpotential of 240 mV to achieve a current density of 10 mA cm −2 , which is lower than RuO 2 (291 mV). More impressively, the specific mass activity of [RuO 2 ] 3 [MgMnZnCoF 2 ] 1 is 537.1 A g Ru −1 at 1.55 V (vs RHE), which is ca. 7.6 times that of RuO 2 (70.5 A g Ru −1 ). The enhanced electrocatalytic OER performance obtained on [RuO 2 ] 3 [MgMnZnCoF 2 ] 1 is ascribed to the contribution of the different cationic and anionic elements that modulates the electronic structures of the pristine RuO 2 , which facilitates efficient OER kinetics. This work demonstrates the efficacy of high-entropy design towards approaching excellent catalysts for enhanced electrocatalysis.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Zhigang Gao,Lugui Cui,Yushi Chu,Luyue Niu,Jing Xiao,Jing Ren
In this work, rare earth ions (REs) including Yb 3+ /Er 3+ , Yb 3+ /Ho 3+ and Yb 3+ /Tm 3+ co-doped manganese oxyfluoride glasses were fabricated using melt quenching method. By fully utilizing the upconversion luminescence (UCL) of REs and regulating energy transfer between the different energy levels of RE ions and the 4 T 1 level of Mn 2+ , the output of UCL was regulated and even pure-red light can be achieved. Moreover, owing to the selective partitioning caused by phase-separation network structure in the oxyfluoride glass, the UCL intensity of glasses annealed for 72 h is significantly enhanced 58 times compared to the rapidly quenched samples.
研究领域:
材料科学
·
光学
·
光子学
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2024
·
IF 9.5
He Jinhua,Wang Chenhui,Liu Mingrui,Ramzan Muhammad,Long Zhiwei,Wu Xian-gang,Chen Yu,Zhong Haizheng
The potential use of large-size ZnSe quantum dots as blue emitters for display applications has greatly inspired the colloidal synthesis. Herein, we report the negative effects of side reactions of large-size ZnSe quantum dots. The side reactions between oleic acid and oleylamine generated amidation products and H 2 O, which led to the hydrolysis of Zn(OA) 2 to Zn(OH) 2 and the subsequent formation of zinc oxide (ZnO) and zinc bis[diphenylphosphinate] (Zn(DPPA) 2 ) precipitates. These side reactions resulted in the formation of a defective surface including a Se-rich surface and oxygen-related defects. Such negative effects can be overcome by adopting an etching strategy using potassium fluoride and myristic acid in combination. By overcoating a ZnS shell, blue emissive ZnSe/ZnS quantum dots with a maximum photoluminescence quantum yield of up to 91% were obtained. We further fabricated ZnSe quantum dots-based blue light-emitting diodes with an emission peak at 456 nm. The device showed a turn-on voltage of 2.7 V with a maximum external quantum efficiency of 4.2% and a maximum luminance of 1223 cd·m −2 .
研究领域:
材料科学
·
纳米技术
✓ 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）