MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Peihong Deng,Nana Tang,Shuting Shi,Chuanqin Zhou,Aiting Chen,Quanguo He
In this study, a preparation of hollow nanoscale tubular polysulfide Co 9 S 8 is reported, along with its use in building an electrochemical sensor that can detect dopamine (DA). Utilizing electrochemically reduced graphene oxide (ErGO) as a substrate, the Co 9 S 8 -ErGO/GCE sensor was made by attaching Co 9 S 8 nanotubes to a glassy carbon electrode (GCE) surface. The use of ErGO in the sensor fabrication process not only improves the conductivity but also effectively prevents the aggregation of Co 9 S 8 . A large number of hollow Co 9 S 8 nanotubes are anchored on ErGO, providing more catalytic active sites for electrode reactions. The constructed sensor shows remarkable DA detection ability, with a notable rise in peak current, thanks to the synergistic action of Co 9 S 8 and ErGO. This sensor has a lower detection limit of 4.0 nM and a wide linear range of 0.01–0.1 µM, 0.1–2.0 µM, and 2.0–10 µM. It is also possible to quantify DA in actual samples using Co 9 S 8 -ErGO/GCE, meeting clinical requirements for reproducibility, selectivity and accuracy.
研究领域:
材料科学
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生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2022
·
IF 4
Xingyue Wu,Chengchao Wang,Ze Wang,Yong Qin,Yong Kong
Nanostructured hybrids of Co 9 S 8 and polypyrrole (PPy) were grown on carbon cloth (CC) for battery-type supercapacitor electrode. Zeolitic imidazolate framework (ZIF-67) was first self-assembled on CC, which was further hydrothermally converted to Co 9 S 8 . After electrodeposition of PPy on the surface of CC/Co 9 S 8 , the electrochemical performances of the CC/Co 9 S 8 /PPy were greatly enhanced. After 2500 cycles of charge/discharge, the capacity retention can remain 83.5%. The high cyclic stability of the CC/Co 9 S 8 /PPy might be due to the buffered volume change of Co 9 S 8 during the redox process by the introduction of PPy shell.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yuyu Guo,Shuting Li,Dianyu Xu,Jinxi Han,Zhengqiang Xia,Sanping Chen,Jun Hu,Liping Wei,Zhong Chen,Gang Xie,Shengli Gao,Qi Yang
The surface charge distribution is regarded as a key factor affecting the electrocatalytic performance. Herein, we report a strategy to regulate the surface charge distribution in carbon-based electrocatalyst to enhance its activity and stability in oxygen reduction reaction (ORR). The sample obtained in a sealed reactor N,S co-doped carbon encapsulate Co 9 S 8 nanoparticles (Co 9 S 8 @CNS-S) exhibits excellent ORR performance. X-ray photoelectron spectroscopy, kelvin probe force microscopy and density functional theory simulation were used to investigate the mechanism of performance improvement. The enhanced ORR activity was due to the exposed more positive charge of surface carbon atoms by N, S elements doping synergistic with Co 9 S 8 nanoparticles (NPs). The improved ORR stability was attributed to the carbon layer combination with Co 9 S 8 NPs which greatly suppresses the generation of H 2 O 2 , thus avoiding the erosion of H 2 O 2 on carbon layer during electrocatalysis. This work provides a strategy to regulate electrocatalyst surface charge distribution to achieve active and stable ORR electrocatalyst.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Fei-fei Wang,Lan Xu,Ping Wang,Yan Zhang
Developing highly-efficiency, cost-effective, high-throughput and durable bifunctional electrocatalysts for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) is of paramount important for water splitting. Herein, we report an economical method for the synthesis of WS 2 /Co 9 S 8 core-shell nanoparticles arrayed on hollow-porous carbon fiber (WxCoyS@HCF) via simple electrospinning method and followed by calcination . The WxCoyS@HCF catalysts exhibited pronounced electrocatalytic activity and remarkable stability in electrolyte solution . The excellent electrocatalytic activities can be attributed to the best synergetic effect of appropriate molar ratio of WS 2 and Co 9 S 8 as well as the hollow-porous structure can provide more potential implantation sites.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Jinlu Li,Qin Li,Jie Sun,Yuanyuan Ling,Kai Tao,Lei Han
The design and controlled preparation of hollow and porous metal sulfide arrays are an important issue for electrochemical energy storage and conversion because of their unique structural merits including large surface areas, shortened diffusion paths, and rich reaction sites. Herein, a hollow and porous Co9S8 microplate array (MPA) was successfully fabricated by a facile self-sacrifice template strategy, which involved the uniform growth of a metal–organic framework microplate template on Ni foam (NF) and annealing in air, followed by an anion-exchange reaction with S2– ions. The resulting Co9S8-MPA/NF as a binder-free electrode for a supercapacitor shows a high specific capacitance of 1852 F g–1 (926 C g–1) at 1 A g–1 and an excellent cycling stability (86% retention after 5000 cycles at 20 A g–1). Moreover, a hybrid supercapacitor (HSC) constructed with Co9S8-MPA/NF and activated carbon exhibits an outstanding energy density of 25.49 Wh kg–1 at a high power density of 800 W kg–1 and a long-term stability of 92% capacitance retention after 5000 cycles at 10 A g–1. It is worth noting that the prepared all-solid-state HSC can light a red light-emitting diode for 2 min, proving to be a great practical application prospect. These excellent electrochemical behaviors show that this effective conversion strategy offers more possibilities for the development of high-performance energy storage metal sulfide materials.
研究领域:
材料科学
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电化学
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能源存储与转换
✓ 已验证
DOI
高影响因子
DESALINATION
·
2024
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IF 8.3
Hanjin Jiang,Yanan Guo,Zhiwen Zou,Le Zhao,Zhi Wang,Dong Wang,Xiaoyi Wang,Ling Zhang,Chaoquan Hu
Harvesting freshwater via solar interfacial evaporation is a promising strategy with net-zero emissions. To achieve long-term stable freshwater acquisition, researchers have developed dynamic solar-driven water evaporators. However, these evaporators exhibit limited evaporation rates due to the insufficient photothermal conversion properties of the materials used. In this study, we prepared Co 9 S 8 /CoNiO 2 /Au composite materials through in-situ topological transformation, thereby improving the effect of the heterogeneous crystal lattice mismatch on electron transport. By embedding these materials into a spherical polyurethane sponge, we developed a new type of self-rotating evaporator with a solar full-spectrum absorbance of 95.84 %. The evaporator stably exhibited an evaporation rate of 3.10 kg m −2 h −1 within 240 h in saturated brine. The present work provides insights into the preparation of photothermal composites and the development of high-efficiency stable solar evaporators.
研究领域:
材料科学
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环境科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2024
·
IF 6
Yanan Zhang,Nuo Xu,Jipeng Xu,Chi Shan,Junlei Chen,Liyuan Guo,Long Qin,Fan Wu,Wenhuan Huang
The micro/nano-structural design of 2D-interlayers greatly enhances the electrochemical energy and kinetics as supercapacitor electrode. Herein, a hetero-Co9S8 QDs doped 2D CoNi-LDH with the proper content was constructed through diverse sulfurization times, showing 3D flower-like microsphere. The highly dispersed active QDs on 2D layers promoted both rapid ion/electron transfer kinetics and electrochemical storage capacity, which were evidenced by experiments and density function theory calculations. As a result, the assembled hybrid supercapacitor QDs-Co9S8/CoNi-LDH//activated carbon displays a maximum energy density of 33.3 Wh·kg-1 at a power density of 820.0 W·kg-1. Furthermore, the in-depth analysis of interlayer ion diffusion and formation of quantum dots in heterostructure provide a good way for synthesizing high performance electrode materials with adjustable size and composition.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yali Lu,Yu Ma,Huanyu Liang,Hui Zhang,Yujia Ouyang,Yue Zhu,Huanlei Wang
Carbon materials stand out as anode materials in both lithium-ion batteries and potassium-ion batteries as they are capable of sustaining stable electrochemical cycles, yet limited reversible capacities hinder their further development for practical applications. In this work, carbon materials are rationally designed to integrate with metal sulfides, resulting in a structure of metal-catalyzed nitrogen and sulfur-codoped carbon nanotube-encapsulated Co9S8 nanoparticles. Synthesized by sequential chemical vapor deposition and a sulfidation process, this hybrid structure exhibits high capacities for lithium and potassium storage while maintaining long cycling stability. As a lithium-ion/potassium-ion battery anode, the hybrid delivers a reversible specific capacity (808/429 mA h g–1 at 0.1 A g–1), great rate performance (437/145 mA h g–1 at 10 A g–1), and excellent cyclability. Furthermore, a lithium-ion/potassium-ion hybrid capacitor utilizing this anode can attain substantial energy density and elevated power density (89 W h kg–1/136 W h kg–1 at 4750 W kg–1/1280 W kg–1) simultaneously. Detailed kinetic analyses show that the excellent electrochemical performance originates from a synergistic effect of Co9S8 and functional carbon at a certain ratio. This work may provide useful insights for the application of carbon-based anodes that chemically integrated with metal sulfides for electrochemical energy storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemElectroChem
·
2021
·Vol. 9
·期 3
·e202101566
·
IF 4.59
Xinlin Chen,Ran Jiang,Cunku Dong,Hui Liu,Jing Yang,Xiwen Du
Graphical One-dimensional nanoneedles : An efficient catalyst for overall water splitting is prepared by modulating the electron density of Co 2+ /Co 3+ via the formation of a CoO−Co 9 S 8 heterostructure. It is a great challenge to synthesize efficient electrocatalysts for overall water splitting, especially non-noble metal catalysts. Herein, one-dimensional polycrystalline nanoneedles composed of CoO−Co 9 S 8 nano heterostructures, in situ grown on carbon fiber paper are prepared for efficient overall water electrolysis. Due to strong electronic coupling, charge densities of Co 2+ /Co 3+ in Co 9 S 8 and Co 2+ in CoO are favorably modified at the interface of CoO and Co 9 S 8 , resulting in optimized reaction intermediates absorption and greatly enhanced bifunctional HER/OER activities. CoO−Co 9 S 8 /CFP delivers a current density of 10 mA cm −2 in alkaline electrolyte at overpotentials of 184 mV and 270 mV for HER and OER, respectively. When used as electrocatalyst for overall water splitting, it needs a low cell potential of 1.66 V to realize water electrolysis at 10 mA cm −2 . This work provides a new strategy to tune the electronic structures of transitional metal active sites via constructing nano heterostructures for efficient water electrolysis.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Ying Qi,Tao Zhang,Ningxiang Wu,Huarui Ding,Gongxun Yu,Jiabiao Lian,Li Xu,Jingxia Qiu,Sheng Li
Metal sulfides have been considered promising anode materials for sodium-ion batteries (SIBs) due to their high specific capacities. However, the poor electrical conductivity and sluggish electrochemical kinetics of metal sulfides are the critical factors that are limiting their applications. In this work, cobalt sulfides with heterostructures embedded in an N-doped carbon composite (CoS/Co9S8@NC) have been synthesized to further investigate Na+ diffusion in the SIBs. With contributions from the heterostructure, the N-doped carbon, and the unique morphology, the composite can deliver enhanced rate capability and cycling stability compared to Co9S8. This work depicts the change of Na+ diffusion under the influence of heterostructures, providing an effective strategy of material design for enhancing the electrochemical performance of sodium-ion storage.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yanan Wang,Zeshuo Meng,Xiliang Gong,Chao Jiang,Chenxu Zhang,Jian Xu,Yaxin Li,Jinyu Bao,Yanan Cui,Haibo Wang,Yi Zeng,Xiaoying Hu,Shansheng Yu,Hongwei Tian
The structural instability of Co 9 S 8 often degrades its electrocatalytic activity during long-term cycling, and rationally enhancing its structural stability remains challenging for energy conversion and storage applications. In this work, the density functional theory was used to predict the stability of Co 9 S 8. The calculated results showed that stability could be improved through Fe-doping at the octahedral site compared to pure Co 9 S 8 . To validate the theoretical results, several Fe-incorporated Co 9 S 8 hollow spheres ((Co 1-x Fe x ) 9 S 8 ) with different Co/Fe mole ratios were fabricated by a simple one-step hydrothermal method. The Mössbauer spectra indicated the preference of Fe replacement of Co at the octahedral site. The as-obtained (Co 0.92 Fe 0.08 ) 9 S 8 hollow spheres exhibited superior electrocatalytic performances with a low overpotential of 268 mV at the current density of 10 mA cm −2 , as well as a smaller Tafel slope of 63.9 mV dec −1 and robust stability toward oxygen evolution reaction for 60 h. The resulting (Co 0.94 Fe 0.06 ) 9 S 8 hollow spheres also exhibited a high capacity of 454 F g −1 at 1 A g −1 and amazing cycling stability with 94.03% capacity retention after 5000 cycles. The superior electrochemical performances look promising and suggest the relevance of the proposed approach for the construction of future improved structures.
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 MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Zhenxin Zhao,Zonglin Yi,Rong Niu,Jiajun Chen,Rajesh Pathak,Yongzhen Wang,Jeffrey W Elam,Xiaomin Wang
While neutral aqueous metal batteries, featuring cost-effectiveness and non-flammability, hold significant potential for large-scale energy storage, their practical application is hampered by the limited specific capacity of cathode materials (less than 500 mAh g −1 ). Herein, capacity-oriented CoS 2 and rate-optimized Co 9 S 8 cathodes are developed based on the aqueous copper ion system. The charge-storage mechanism is systematically investigated through a series of ex-situ tests and density functional theory calculations, focusing on the reversible transitions of Co 9 S 8 →Cu 7 S 4 →Cu 9 S 5 /Cu 1.8 S and CoS 2 →Cu 7 S 4 →Cu 2 S, which are associated with the redox reactions of Cu 2+ /Cu + ‖Co 2+ /Co and Cu 2+ /Cu + ‖S 2 2− /S 2− , respectively. The electrochemical results show that CoS 2 can exhibit a superior capacity of 619 mAh g −1 at 1 A g −1 after 400 cycles, while Co 9 S 8 maintains an outstanding rate performance of 497 mAh g −1 at 10 A g −1 (the retention rate is 95% compared to 521 mAh g −1 at 1 A g −1 ). As a proof of concept, an advanced CoS 2 //Zn hybrid aqueous battery demonstrates a working voltage of 1.20 V and a specific energy of 663 Wh kg cathode −1 . This work provides an alternative direction for developing sulfide cathodes in energetic aqueous metal batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 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）