JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Qimeng Peng,Ju Fu,Gang Chen,Dong Feng,Tianbiao Zeng
Antimony sulfides exhibit a tremendous potential owing to the high theoretical specific capacity from multiple redox storage mechanisms for sodium-ion batteries (SIBs). However, these bottlenecks, including low electrical conductivity , poor ionic diffusion kinetics, and severe volume expansion, still restrict the development of antimony sulfide as SIBs anodes. Meanwhile, in view of long-term interests and practical application, the cost-efficient preparation methods become an imminent challenge to the advancement of high-performance SIBs anodes. Here, a novel three-step strategy, composed of co-precipitation, heat reduction processes, and sulfation conversion, was utilized to construct a “reinforced concrete” architecture, in which Sb 2 S 3 nanoparticles embedded in N-doped carbon matrix (NC) modified by carbon nanotubes (CNTs), denoted as Sb 2 S 3 /CNTs/NC. As the “cement block”, the N-doped 3D carbon matrix can promote the electron migration and reduce the aggregation of active materials upon cycling. In terms of “rebars” (i.e., 1D CNTs) for ensuring the anode integrality during incessant sodiation/de-sodiation processes, they function as binders and stabilizers , which intimately cross-link with Sb 2 S 3 nanoparticles and carbon matrix, accommodate the volume change, and maintain the fast transfer of electron transfer inside the whole composite. Benefiting from these merits of the hierarchical structure (i.e., 3D NC and 1D CNTs), as an anode for SIBs, Sb 2 S 3 /CNTs/NC demonstrates an improved sodium storage capability with an initial specific capacity of 770.80 mAh g −1 at 0.1 A g −1 and a superior initial coulombic efficiency (ICE) of 79.90%. Moreover, even at a high current density of 1.0 A g −1 , a reversible capacity of 313.54 mAh g −1 can be delivered after 350 long cycles, indicating the stable cyclicity. The Sb 2 S 3 /CNTs/NC with designed construction and enhanced electrochemical performance could provide a new perspective on low-cost, time-saving, and exercisable synthesis approach for high-performance sulfide-based anodes.
研究领域:
材料科学
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电化学
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能源存储
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Sehrish Mehdi,Yanyan Liu,Huijuan Wei,Hao Wen,Ruofan Shen,Zhikun Peng,Huanhuan Zhang,Xianli Wu,Chengming Wang,Shuyan Guan,Tao Liu,Baojun Li
Zeolitic imidazole framework (ZIF-67)-derived Co metal catalysts have gained attention as competitive catalysts due to their high metal loading and superior metal dispersion. However, the problems of Co cluster aggregation during use and difficulty in collection of the powder catalyst from the reaction system need to be solved. In this work, Co-based nanoparticles (NPs) are fabricated on a Ni foam. The monolithic catalyst, Co–NC/NF, has been prepared by the pyrolysis of the ZIF-67/NF precursor using manual coating. The characterization confirms the embedding and uniform distribution of Co NPs (10–20 nm) in the N-doped C matrix. The optimized Co–NC/NF600 reveals satisfactory catalytic activity upon hydrolysis of ammonia borane with a hydrogen evolution (rB = 1176 mL min–1 g–1Co), a turn over frequency (TOF = 180 h–1), and an apparent activation energy (Ea = 64 kJ mol–1). The catalytic activity of Co–NC/NF600 with Co and CoOx as active sites has the best rank among the previously reported Co monolithic catalysts. The superior stability and reusability of the catalyst with ∼ 90% retention after five uses are demonstrated under mild NH3BH3 hydrolysis conditions, originating from the high antiaggregation ability of the active sites and the easy recollection of the catalyst. The adopted novel strategy has the potential to synthesize monolithic catalysts applicable in other fields of heterogeneous catalysis in industrial applications such as energy storage and conversion.
研究领域:
材料科学
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催化
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能源存储与转换
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化学工程
✓ 已验证
DOI
高影响因子
ACS Nano
·
2024
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IF 15.8
Yunxia Duan,Yongming Xia,Yuxuan Ling,Shijie Zhou,Xuehui Liu,Yinghui Lan,Xiong Yin,Yusen Yang,Xiaoying Yan,Minghui Liang,Song Hong,Lipeng Zhang,Leyu Wang
Manipulating the local coordination environment of central metal atoms in single-atom catalysts (SACs) is a powerful strategy to exploit efficient SACs with optimal electronic structures for various applications. Herein, Co-SACs featured by Co single atoms with coordinating S atoms in the second shell dispersed in a nitrogen-doped carbon matrix have been developed toward the selective hydrogenation of halo-nitrobenzene. The location of the S atom in the model Co-SAC is verified through synchrotron-based X-ray absorption spectroscopy and theoretical calculations. The resultant Co-SACs containing second-coordination shell S atoms demonstrate excellent activity and outstanding durability for selective hydrogenation, superior to most precious metal-based catalysts. In situ characterizations and theoretical results verify that high activity and selectivity are attributed to the advantageous formation of the Co–O bond between p-chloronitrobenzene and Co atom at Co1N4–S moieties and the lower free energy and energy barriers of the reaction. Our findings unveil the correlation between the performance and second-shell coordination atom of SACs.
研究领域:
催化
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材料科学
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化学工程
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物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
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2022
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IF 11.889
Umar Abdulbaki Danhassan,Xin Zhang,Riying Qi,Mahmoud M. Ali,Kuichuan Sheng,Hongjian Lin
Biochar (BC) is a low-cost and electroactive adsorbent for removing sulfide in aqueous media, which toxifies aquatic organisms and corrodes water treatment facilities. However, it lacks a pore structure for sulfide ion (S 2- ) mass transfer to active sites. Herein, it is shown that nickel-modified biochar (BC-Ni) adsorbed S 2- 2.72-fold faster than BC alone and attained a 1244 ± 252 mg-sulfide/g maximum adsorption capacity due to markedly increased mesopores, while BC attained 583 ± 250 mg-sulfide/g. Factors influencing S 2- sorption and theoretical sorption kinetics and isotherms models were evaluated. Structural and surface compositions of BC and BC-Ni were examined using state-of-the-art characterizations. The results suggest that S 2- was adsorbed via pore diffusion, pore filling, and cation bridging and oxidized to elemental sulfur and sulfate with quinone and hydrogen peroxide generated from dehydrogenation of hydroquinone on the BC-Ni by metallic nickel in the carbon matrix. This study would spur biomass valorization and desulfurization.
研究领域:
环境科学
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水处理
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
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2023
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IF 13.1
Xuhao Liu,Runzhe Yao,Siqi Wang,Yaqing Wei,Bin Chen,Wei Liang,Caiyun Tian,Chengyu Nie,De Li,Yong Chen
The emerging SiP 2 with large capacity and suitable plateau is proposed to be the alternative anode for Li-ion batteries. However, typical SiP 2 still suffers from serious volume expansion and structural destruction, resulting in much Li-consumption and capacity fading. Herein, a novel stretchable and conductive Li-PAA@PEDOT:PSS binder is rationally designed to improve the cyclability and reversibility of SiP 2 . Interestingly, such Li-PAA@PEDOT:PSS hydrogel enables a better accommodation of volume expansion than PVDF binder (e.g. 5.94% vs. 68.73% of expansivity). More specially, the SiP 2 electrode with Li-PAA@PEDOT:PSS binder is surprisingly found to enable unexpected structural recombination and self-healing Li-storage processes, endowing itself with a high initial Coulombic efficiency (ICE) up to 93.8%, much higher than PVDF binder (ICE = 70.7%) as well. Such unusual phenomena are investigated in detail for Li-PAA@PEDOT:PSS, and the possible mechanism shows that its Li-PAA component enables to prevent the pulverization of SiP 2 nanoparticles while the PEDOT:PSS greatly bridges fast electronic connection for the whole electrode. Consequently, after being further composited with carbon matrix, the SiP 2 /C with Li-PAA@PEDOT:PSS hydrogel exhibits high reversibility (ICE> 93%), superior cyclability (>450 cycles), and rate capability (1520 mAh/g at 2000 mA/g) for LIBs. This highly stretchable and conductive binder design can be easily extended to other alloying materials toward advanced energy 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
JOURNAL OF POWER SOURCES
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2017
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IF 6.395
Hanna He,Qi Zhang,Haiyan Wang,Hehe Zhang,Jiadong Li,Zhiguang Peng,Yougen Tang,Minhua Shao
Inferior electronic conductivity and sluggish sodium ion diffusion are still two big challenges for TiO 2 anode material for Na ion batteries (SIBs). Herein, we synthesize TiO 2 /C composites by the pyrolysis of MIL-125(Ti) precursor and successfully introduce defects to TiO 2 /C composite by a simple magnesium reduction. The as-prepared defect-rich TiO 2-δ /C composite shows mooncake-shaped morphology consisting of TiO 2-δ nanocrystals with an average particle size of 5 nm well dispersed in the carbon matrix. When used as a SIBs anode, the defect-rich TiO 2-δ /C composite exhibits a high reversible capacity of 330.2 mAh g −1 at 50 mA g −1 at the voltage range of 0.001–3.0 V and long-term cycling stability with negligible decay after 5000 cycles. Compared with other four TiO 2 /C samples, the electrochemical performance of defect-rich TiO 2-δ /C is highly improved, which may benefit from the enhanced electronic/ionic conductivities owing to the defect-rich features, high surface area rendering shortened electronic and ionic diffusion path , and the suppress of the TiO 2 crystal aggregation during sodiation and desodiation process by the carbon matrix.
研究领域:
材料科学
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能源存储
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纳米技术
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2018
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IF 5.116
Yufei Li,Libo Shi,Xuan Cai,Hongli Zhao,Xiangheng Niu,Minbo Lan
Quantification of superoxide anions (O 2 − ) is of great significance for the pathological research of many diseases. In this work, a non-enzymatic electrochemical sensor for superoxide sensing was fabricated on the basis of metal-organic frameworks (MOFs)-derived porous carbon matrix loaded with Pt and Co nanoparticles (denoted as Pt-Co-PC). Zeolitic imidazolate framework-67 (ZIF-67) was utilized as the precursor through a one-step calcination under N 2 atmosphere to prepare cobalt nanoparticles-porous carbon composites (denoted as Co-PC). Pt-Co-PC was then obtained by using a facile galvanic replacement procedure with Co-PC and chloroplatinic acid solution. Furthermore, the home-made screen printed gold electrodes (SPGEs) were used to immobilize the as-synthesized materials, constructing Pt-Co-PC modified electrochemical sensors. The recommended Pt-Co-PC/SPGE sensors exhibit excellent electrochemical performance for the detection of O 2 − with an extremely low detection limit of 0.118 μM (S/N = 3) and a high sensitivity of 6.218 × 10 −4 mA μM −1 cm −2 . Meanwhile, the proposed sensors possess superior reproducibility and stability. More importantly, our sensors have successfully captured the electrochemical signals of O 2 − released from Hela cells, which means the fabricated sensors have potential application of monitoring O 2 − in pathological and biological fields.
研究领域:
电化学
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生物传感器
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纳米技术
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分析化学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2023
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IF 6.1
Qiong Wu,Jing Yu,Mingjin Zhang,Yinran Xiong,Lijia Zhu,Bo Wei,Ting Wu,Yiping Du
The liver is a major organ in metabolism, and alterations in serum lipids are associated with liver disorders. Here, a rapid, easy, and reliable screening technique based on lipidomic profiling was developed using machine learning and surface-assisted laser desorption ionization mass spectrometry (SALDI MS) for liver cancer diagnosis. A graphitized carbon matrix (GCM) was created for serum lipid profiling in SALDI MS and demonstrated a better performance for neutral lipids analysis than conventional organic matrices. The fingerprint of serum lipids, including triacylglycerols (TGs), diacylglycerols (DGs), cholesteryl esters (CEs), glycerophospholipids (GPs), and other components, could be directly obtained by GCM-assisted LDI MS without extraction. Five machine learning methods were applied to distinguish liver cancer (LC) patients from healthy controls (HC) and chronic hepatitis B (CHB) patients. The best diagnostic performance was attained by linear discriminant analysis (LDA), which has a confusion matrix accuracy of 98.3 %. The receiver operating characteristic (ROC) curve for liver cancer exhibited an area under the curve (AUC) of 0.99, indicating a high degree of prediction accuracy. One-way ANOVA analysis revealed that numerous TGs were down-regulated in LC group. The results demonstrated the viability of GCM-assisted LDI MS as a valuable diagnostic tool for liver cancer.
研究领域:
医学诊断
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质谱技术
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机器学习
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癌症研究
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脂质组学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2018
·
IF 5.091
Dong Xiang,Xiangjie Bo,Xiaohui Gao,Cheng Du,Ping Li,Liande Zhu,Wei Chen
Nonprecious-metal electrocatalysts have been intensively investigated, but how to keep a balance between their sustainability and competitive performance for the oxygen reduction reaction (ORR) is still a big challenge for energy applications. In this work, a type of bimetal- and nitrogen-codoped mesoporous carbon electrocatalyst (FeCo-N/C-800) was successfully synthesized via a simple hydrothermal method , followed by a calcination process at 800 °C in nitrogen atmosphere and an acid-etching process. The obtained FeCo-N/C-800 can act as a high-performance ORR catalyst with high onset and half-wave potentials (0.94 and 0.85 V), a large limiting current density (5.94 mA cm −2 ) and a four-electron reaction process in 0.1 M KOH solution, which can be comparable with commercial Pt/C catalyst. Additionally, the FeCo-N/C-800 exhibited superior long-term durability and high methanol tolerance. The excellent electrocatalytic performance of the FeCo-N/C-800 can be ascribed to the mesoporous structure (bimodal pores system), the synergetic interaction of the multiple ORR active sites, suitable N-doping level and the highly conductive carbon matrix. These structural features can promote efficiently the mass and electron transfer , provide abundant active sites for the adsorption and reaction of oxygen molecules, and thus improve the reaction kinetics. The present study not only provides a strategy for the synthesis of carbon-based electrocatalyst with high ORR catalytic activity and stability, but also demonstrates that the bimetal- and nitrogen-codoped carbon materials could be a class of competitive candidate for non-noble metal-based electrocatalysts.
研究领域:
电化学
·
材料科学
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能源材料
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催化
✓ 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）