INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2018
·
IF 4.229
Zhaomin Wang,Lu Yu,Limin Chang,Limin Wang,Yong Cheng
Owing to its high capacity of 994 mAh g −1 , low cost, and environmental friendliness , tin (Sn) is considered as an advanced anode material for high-capacity lithium-ion batteries (LIBs). Here, a facile strategy to fabricate core-shell structured Sn@NC composites with one-step and large-scale production is introduced in a liquid-phase reaction under room temperature . When used as anode materials for LIBs, the optimal Sn@NC composite delivers a high reversible discharge capacity of 761.2 and 476 mAh g −1 at a current density of 200 and 1000 mA g −1 after 200 cycles, respectively. A high capacity of 328.3 mAh g −1 can also be obtained even at a current density of 2000 mA g −1 . The excellent cycling stability and rate performance of the composite can be ascribed to the synergistic effect of the nanometer size of Sn powder and porous structure of the carbon shell, both of which can effectively reduce the absolute volume change of electrode during the repeated charge-discharge cycles, and thus lead to excellent electrochemical performances at both rate capability and cycling life.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2021
·
IF 6.425
Xiaobin Liu,Fanfan Liu,Xudong Zhao,Li-Zhen Fan
The development of dual-function anode materials for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) is exceedingly essential. Herein, with rationally designed hierarchical metal-organic framework (MOF)@MXene as a precursor, a novel sandwich-like CoP-NC@Ti 3 C 2 T x composite has been successfully fabricated by the following phosphorization reaction. As anode material for LIBs, the CoP-NC@Ti 3 C 2 T x composite exhibits remarkable electrochemical performance with high-rate capability (147.8 mAh g −1 at 2000 mA g −1 ; 245.6 mAh g −1 at 100 mA g −1 ) and ultralong cycling life (2000 cycles with a capacity retention over 100%). For SIBs, it delivers a discharge capacity of 101.6 mAh g −1 at a current density of 500 mA g −1 after 500 cycles. The well-designed sandwich-like composite effectively supports the easy access to electrolyte, facilitate the Li/Na ion transportation, and protect the active material from pulverization upon long cycling. In addition, the electrochemical reaction kinetics and Li-migration kinetics of the CoP-NC@Ti 3 C 2 T x composite have been pioneeringly illuminated by pseudocapacitive behavior calculation and density functional theory (DFT) computations, respectively. This work sheds light on the rational design and development of MOF/MXene-derived dual-function anode materials for Li/Na-storage.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2022
·Vol. 66
·期 1
·169-178
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IF 8.64
Wei Haisheng,Song Huaxing,Ren Yujing,Yan Xiaorui,Fang Geqian,Wang Wenhua,Ren Wanzhong,Zhu Mingyuan,Lin Jian
Metal-organic frameworks (MOFs) derived Co-based catalysts have received extensive attention in the chemoselective hydrogenation of nitroarenes, while they usually require a lot of solvent during the synthesis and identification of active species. This study explores a solid-phase synthesis strategy to obtain MOF precursors without using any solvent, which is then foamed and pyrolyzed to synthesize the Co@NC-X catalyst. It was found that a nitrogen-doped graphene shell can well encapsulate the Co nanoparticles. The resulting catalyst, which was pyrolyzed at 800°C, exhibited ~100% conversion for the hydrogenation of 3-nitrostyrene and >99% selectivity to 3-vinylaniline. This catalyst also showed excellent stability and good substrate universality for the hydrogenation of extensive substituted nitroarenes. Various characterizations revealed a positive relationship between the catalytic performance and the content of Co—N species tuned by pyrolysis temperature. This work provides a novel and green strategy to design an efficient Co-based catalyst for chemoselective hydrogenation.
研究领域:
催化
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材料科学
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化工
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绿色化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Ruixia Li,Minghui Shang,Taotao Zhe,Mingyan Li,Feier Bai,Zhihao Xu,Tong Bu,Fan Li,Li Wang
Developing electrode materials with excellent electrocatalytic properties for detecting pesticide residues plays a vital role in the safety of agricultural products and environmental applications. Herein, we designed a new electrochemical sensor on the basis of N-doped carbon hollow nanospheres modified with Sn/MoC Schottky junction (Sn/MoC@NC) for methyl parathion (MP) detection. The Sn/MoC@NC was prepared by self-assembled polymerization-anchoring strategy and high-temperature carbonization design. Sn/MoC Schottky junction and hollow nanosphere structure endow Sn/MoC@NC with a larger surface area, more active sites, and faster electron transfer , which is beneficial to enhancing its electrocatalytic performance. The structural characterizations and physicochemical properties of Sn/MoC@NC were explored through various microscopy, spectroscopic and electrochemical techniques. The experimental results confirmed that the calibration curve for current and MP concentration (0.05–10 μg/mL) was available under optimized conditions, and the sensitivity and detection limit were respectively determined to be 9.02 μA μM 1 cm 2 and 8.9 ng/mL. Furthermore, the constructed sensor displayed excellent selectivity , repeatability, and stability, which qualified it for use in detecting MP in grapes and tap water with satisfactory recovery. This work may provide some interesting prospects for constructing high-performance electrocatalysts for MP detection.
研究领域:
电化学
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材料科学
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环境科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
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IF 5.1
Haoran Yang,Xu Zhao,Ke Shang,Yu Zhang,Mian Li,Tingting Liu
Non-noble-metal nanomaterials, characterizing by their low cost, large surface area, abundant active sites, and superior conductivity, play a pivotal role in the development of advanced electrochemical sensors. In this study, cobalt oxalates recovered from waste lithium-ion batteries are employed as cobalt sources to successfully synthesize three-dimensional (3D) porous Co-Co 3 O 4 @NC-CNT microspheres via a straightforward hydrothermal method. The sensors based on Co-Co 3 O 4 @NC-CNT microspheres enable rapid, sensitive, and precise detection of hydrogen peroxide (H 2 O 2 ) and glucose. Under optimum conditions, when used for glucose detection, the Co-Co 3 O 4 @NC-CNT microspheres exhibit a rapid response time of 2.9 s, a low limit of detection (LOD = 0.066 μM), a high sensitivity of 104.73 μA cm −2 mM −1 , and a wide linear range of 0.01 to 16.0 mM. For H 2 O 2 detection, the 3D porous Co-Co 3 O 4 @NC-CNT microspheres demonstrate an excellent sensitivity of 238.74 μA cm −2 mM −1 , a low LOD of 0.128 μM, and a wide linear range of 0.04 to 16.0 mM. In addition, as non-enzymatic sensors for both glucose and H 2 O 2 , the 3D porous Co-Co 3 O 4 @NC-CNT microspheres showcase exceptional stability, repeatability, and remarkable resistance to interference from organic and inorganic molecules. Notably, the electrochemical sensors based on Co-Co 3 O 4 @NC-CNT microspheres demonstrate excellent accuracy in the quantitative determination of H 2 O 2 and glucose concentrations in real samples. This study not only establishes a promising industrial chain for the recycling of cobalt from spent devices to synthesize 3D porous and spherical Co-Co 3 O 4 @NC-CNT catalysts, but also paves the way for the sensitive and rapid detection of H 2 O 2 and glucose concentrations in real samples, along with other biosensing applications.
研究领域:
材料科学
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电化学
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环境科学
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纳米技术
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2020
·Vol. 26
·期 56
·12882-12890
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IF 4.857
Qiongguang Li,Yanhong Wang,Qiangqiang Tan,Ziyi Zhong,Fabing Su
Graphical Hollow core–shell anode : An SnO 2 @C@Co-NC anode material with hollow core–shell structure was structurally designed and synthesized by a heteroatom-doping and multiconfinement approach. This material can efficiently alleviate the volume expansion of the SnO 2 -based anode materials and exhibits much-enhanced electrochemical performance, including high rate performance and cycle stability, as well as superior capacity. To overcome the drawbacks of the structural instability and poor conductivity of SnO 2 -based anode materials, a hollow core–shell-structured SnO 2 @C@Co-NC (NC=N-doped carbon) composite was designed and synthesized by employing the heteroatom-doping and multiconfinement strategies. This composite material showed a much-reduced resistance to charge transfer and excellent cycling performance compared to the bare SnO 2 nanoparticles and SnO 2 @C composites. The doped heteroatoms and heterostructure boost the charge transfer, and the porous structure shortens the Li-ion diffusion pathway. Also, the volume expansion of SnO 2 NPs is accommodated by the hollow space and restricted by the multishell heteroatom-doped carbon framework. As a result, this structured anode material delivered a high initial capacity of 1559.1 mA h g −1 at 50 mA g −1 and an initial charge capacity of 627.2 mA h g −1 at 500 mA g −1 . Moreover, the discharge capacity could be maintained at 410.8 mA h g −1 after 500 cycles with an attenuation rate of only 0.069 % per cycle. This multiconfined SnO 2 @C@Co-NC structure with superior energy density and durable lifespan is highly promising for the next-generation lithium-ion batteries.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2023
·Vol. 38
·期 9
·2359-2368
·
IF 2.7
Ma Junjie,Liu Hangcheng,Tao Zeyu,Liu Jianfeng,Yuan Binxia,Pan Weiguo,Shi Zhengrong
In order to reveal the relationship between the structure and the electrochemical oxygen reduction reaction (ORR) activity of different double transition metal decorated catalysts, three different double transition metal and N co-doped carbon material cathode catalyst materials (FeCo–NC, FeNi–NC and CoNi–NC) were prepared in this study. The FeCo–NC catalysts synthesised in this study still showed high ORR activity under alkaline conditions, with a half-wave potential of 0.783 V RHE , a mass activity (MA) of 11.36 A/g (0.77 V RHE ) and an ultimate current density of − 4.46 mA cm −2 ; after 30,000 cycles, the half-wave potential only decreased to 99.3% of the initial potential. Meanwhile, we employ MS to establish three different double transition metal and N co-doped graphene catalysts and to calculate and analyse their desorption properties, leading to the FeCo–NC material being the model with the highest ORR activity, which is consistent with the experimental results. Graphical Abstract
研究领域:
电化学
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材料科学
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催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Ruru Fu,Qingze Jiao,Xueting Feng,Huanhuan Zhu,Chao Yang,Caihong Feng,Hansheng Li,Yaoyuan Zhang,Daxin Shi,Qin Wu,Yun Zhao
As an efficient non-precious metal catalyst for the oxygen evolution reaction (OER), phosphides suffer from poor electrical conductivity , so it is still a challenge to reasonably design their structures to further improve their conductivity and OER performances. Here, we present a novel Ni 5 P 4 / N -doped carbon@CoFeP/ N -doped carbon composite (Ni 5 P 4 /NC@CoFeP/NC) as electrocatalysts for OER. This elaborate structure consists of Ni 5 P 4 /NC derived from Ni-MOF and CoFeP/NC derived from CoFe-Prussian blue analog MOF (Co-Fe PBA). The cube-like CoFeP/NC are scattered and uniformly coated on the sheet of Ni 5 P 4 /NC flowers. Among them, NC can enhance the conductivity of phosphides, while CoFeP/NC can increase the electrochemical active area, which benefit the properties of Ni 5 P 4 /NC@CoFeP/NC. Notably, the Ni 5 P 4 /NC@CoFeP/NC catalyst possesses outstanding OER performances with a low overpotential of 260 and 303 mV at a current density of 10 and 100 mA·cm −2 , an ultra-low Tafel slope of 31.1 mV·dec -1 and excellent stability in 1 M KOH. XPS analysis shows that proper chemical composition promotes the oxidation of transition metal species and the chemisorption of OH – , thus accelerating the OER kinetics. Therefore, this work provides a hopeful method for designing and preparing transition metal phosphide/carbon composite as OER electrocatalysts.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Zhiwen Chen,Siming Fei,Chenghao Wu,Peijun Xin,Shoushuang Huang,Linnéa Selegård,Kajsa Uvdal,Zhangjun Hu
Transition-metal oxides (TMOs) are potential candidates for anode materials of lithium-ion batteries (LIBs) due to their high theoretical capacity (∼1000 mA h/g) and enhanced safety from suppressing the formation of lithium dendrites. However, the poor electron conductivity and the large volume expansion during lithiation/delithiation processes are still the main hurdles for the practical usage of TMOs as anode materials. In this work, the CoSnO3@NC@MnO@NC hierarchical nanobox (CNMN) is then proposed and fabricated to solve those issues. The as-prepared nanobox contains hollow cubic CoSnO3 as a core and dual N-doped carbon-“sandwiched” MnO particles as a shell. As anode materials of LIBs, the hollow and carbon interlayer structures effectively accommodate the volume expansion while dual active TMOs of CoSnO3 and MnO efficiently increase the specific capacity. Notably, the dual-layer structure of N-doped carbons plays a critical functional role in the incorporated composites, where the inner layer serves as a reaction substrate and a spatial barrier and the outer layer offers electron conductivity, enabling more effective involvement of active anode materials in lithium storage, as well as maintaining their high activity during lithium cycling. Subsequently, the as-prepared CNMN exhibits a high specific capacity of 1195 mA h/g after the 200th cycle at 0.1C and an excellent stable reversible capacity of about 876 mA h/g after the 300th cycle at 0.5C with only 0.07 mA h/g fade per cycle after 300 cycles. Even after a 250 times fast charging/discharging cycle both at 5C, it still retains a reversible capacity of 422.6 mA h/g. We ascribe the enhanced lithium storage performances to the novel hierarchical architectures achieved from the rational design.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Yuan Chen,Hao Guo,Fan Yang,Ning Wu,Junye Zhang,Liping Peng,Bingqing Liu,Zhilan Pan,Wu Yang
A metal porous carbon (Ni@NC) supported nickel/cobalt layered double hydroxide (NiCo-LDH) (Ni@NC@NiCo-LDH) with a cauliflower morphology was synthesized by a successive double template method . At first a nickel metal-organic framework (Ni-MOF) was prepared and used as a sacrifice template to produce metal porous carbon (Ni@NC). Then the prepared conductive porous carbon material was exploited as a substrate for in-situ growing of ZIF-67 on its surface. Lastly the obtained Ni@NC@ZIF-67 was further used as a sacrifice template to prepare the final electrode material Ni@NC@NiCo-LDH by Ni 2+ etching and co-precipitation. The cooperation of Ni@NC with excellent conductivity and NiCo-LDH with superior pseudocapacitive property yielded a synergistic effect , which effectively improved the electrochemical performance of the resulted electrode material. And the special flower morphology exposed more redox active sites and provided proper charge transport path for enhanced electrochemical performance. The prepared Ni@NC@NiCo-LDH exhibited a high specific capacitance of 1761.8 F·g −1 at the current density of 1 A·g −1 . The assembled Ni@NC@NiCo-LDH//AC asymmetric supercapacitor also displayed an acceptable energy density (39.27 Wh·kg −1 at the power density of 757.21 W·kg −1 ) and ultrahigh cycling stability (94.74% capacitance retention after 25000 cycles at 10 A g −1 ).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Feng Zhou,Xiaofeng Ke,Yihuang Chen,Mei Zhao,Yun Yang,Youqing Dong,Chao Zou,Xi'an Chen,Huile Jin,Lijie Zhang,Shun Wang
The scarcity, high cost and susceptibility to CO of Platinum severely restrict its application in alkaline hydrogen oxidation reaction (HOR). Hybridizing Pt with other transition metals provides an effective strategy to modulate its catalytic HOR performance, but at the cost of mass activity due to the coverage of modifiers on Pt surface. Herein, we constructed dual junctions’ Pt/nitrogen-doped carbon (Pt/NC) and δ-MoC/NC to modify electronic structure of Pt via interfacial electron transfer to acquire Pt-MoC@NC catalyst with electron-deficient Pt nanoparticles, simultaneously endowing it with high mass activity and durability of alkaline HOR. Moreover, the unique structure of Pt-MoC@NC endows Pt with a high CO-tolerance at 1,000 ppm CO/H 2 , a quality that commercial Pt-C catalyst lacks. The theoretical calculations not only confirm the diffusion of electrons from Pt/NC to MoC/NC could occur, but also demonstrate the negative shift of Pt d -band center for the optimized binding energies of *H, *OH and CO.
研究领域:
材料科学
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催化化学
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理论计算
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yiting Lei,Yulong Ma,Yonggang Sun,Liqiong Wang,Yingbo Zhu,Jinpeng Wei,Bolong Zhao,Li Zhu
Lignin, as a kind of biomacromolecule, plays a crucial role in the development of renewable energy sources. However, achieving excellent catalytic efficiency and selectivity towards expected products over a single catalytic system remains a significant challenge. The adjustment of acidic sites is an effective strategy to enhance hydrodeoxygenation (HDO) activity and product selectivity. This strategy facilitates charge transfer and activates substrate migration with the catalyst. Therefore, it is necessary to understand the relationship between the structure and activity of acid sites in catalysts, and construct synergistic Brønsted-Lewis sites. In this study, the incorporation of Ni@NC active phase derived from metal-organic frameworks (MOFs) significantly enhanced both the strength and quantity of Lewis acid sites (LASs) in the Ni@NC-HZSM-5 composite catalyst. This enhancement facilitated the cleavage of C Ar –OCH 3 bonds in lignin oil. Furthermore, the abundant Brønsted acid sites (BASs) present in HZSM-5 markedly promoted the cleavage of C Ar –OH bonds. Efficient conversion of real lignin oil was achieved through the synergistic action of the dual-acid sites, resulting in the conversion of 98.50 % and the C 6+ cycloalkane selectivity of 95.05 %. This study proposed a novel approach to the efficient upgrading of lignin-based bio-oil into alternative fuels using heterogeneous catalysts.
研究领域:
生物化学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）