INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Meijing Cao,Jing Tian,Yang Zhou,WenLong Liu,Jin Dang,Weibing Li,Jiarun Li,Lei Wang
The low electrical conductivity and catalytic activity of transition metal sulfides have been identified as the primary factors limiting their application in the field of electrocatalytic water splitting. In this study, FeS 2 and Co-FeS x were initially synthesized through a hydrothermal method, followed by further annealing in an NH 3 atmosphere to obtain Co,N-FeS x . The introduction of Co led to adjustments in the electronic structure, resulting in the formation of FeS 2 /FeS (FeS x ) heterojunctions that facilitated accelerated charge transfer. Simultaneously, Co element doping increased the electrochemical active surface area, providing more active sites for the reactions. N element doping, on the other hand, introduced sulfur vacancies, thereby enhancing electrical conductivity and improving charge transfer efficiency. As a result, Co,N-FeS x exhibited significantly higher activities for the oxygen evolution reaction (OER) and overall water splitting compared to FeS 2 , with overpotentials of 290 mV and 330 mV, respectively, at a current density of 10 mA cm −2 . Furthermore, the catalyst demonstrated excellent stability. The designed structure of the catalyst provides theoretical support for the study of Fe-based catalysts in OER and overall water splitting.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Nano
·
2022
·
IF 13.364
Z. Yan,Z. Sun,L. Zhao,H. Liu,Z. Guo,Y. Qiu,P. Wang,L. Qian
In this work, via in-situ induction of phosphorus doping, FeS 2 microflowers with sulfur vacancies were rationally designed and fabricated for lithium-ion batteries (LIBs). Phosphorus doping enlarged interlayer spacings, effectively enhanced the conductivity and facilitated the diffusion and intercalation/deintercalation of Li + . Moreover, the in-situ induced sulfur vacancies also partly rearranged electronic structures and increased more active adsorption sites for Li + . The P 1.0 -FeS 2-x electrode delivered the excellent rate performance (642.6 mAh/g at 5.0 A/g) and long-cyclic performance (544.7 mAh g -1 at 2.0 A/g after 1000 cycles). X-ray absorption fine structure spectroscopy was employed to reveal the decrease of Fe oxidation state and coordination number , confirming sulfur vacancies were in-situ induced through phosphorus doping process. Density function theory calculation declared the doping of phosphorus atoms and in-situ induced sulfur vacancies in FeS 2 could effectively adjust the charge distribution at the active sites for Li adsorption, which enhanced the conductivities and facilitated the electrochemical reaction kinetics. The anionic doping strategy may provide new ideas and routes of constructing transition metal sulfides for high-performance LIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Na Yang,Jiyuan Zhang,Yuanxiao Ji,Weiye Zhang,Jiarui Xue,Xuexia He,Qi Li,Zhibin Lei,Zonghuai Liu,Jie Sun
Lithium–sulfur batteries are particularly prominent among many energy storage devices due to their excellent theoretical specific capacity (1675 mAh g–1) and energy density (2600 kW h–1), low cost, and environmental friendliness. However, such outstanding devices suffer from the low conductivity of elemental sulfur and discharge product, the drastic volume changes during charge and discharge processes, and the shuttle effect caused by soluble lithium polysulfides (LiPSs) dissolved in the electrolyte. In this work, we design and synthesize a poly(3,4-ethylenedioxythiophene) (PEDOT) decorated FeS2@C hollow nanospheres to act as the sulfur host to alleviate the above issues. The excellent catalytic properties of FeS2 together with the superior electrical conductivity and chemical adsorption capacity of the PEDOT coating are combined together to hinder the shuttle effect at the same time. Through the phase structure and morphology characterization, the optimized parameters of PEDOT coating have been confirmed to be 100 μL EDOT monomer addition and polymerization for 10 min. Based on the Li2S6 adsorption, cyclic voltammetry (CV) test of the symmetric cells, and Li2S nucleation experiment, the PEDOT@FeS2@C-4 wt % cathode was proved to exhibit the highest catalytic activity on LiPSs. Through the CV curves with different scan rates and the charge–discharge curves collected with the help of the galvanostatic intermittent titration technique (GITT), it is proved that appropriate PEDOT coating thickness is the key to improve the adsorption/catalytic ability on LiPSs. As a result, the PEDOT@FeS2@C/S-4 wt % cathode can exhibit the highest initial capacity of 1435 mAh g–1 at 0.1 C and remain at 893 mAh g–1 after 100 cycles. Moreover, the capacity decay rate of the PEDOT@FeS2@C/S-4 wt % cathode was confirmed to be 0.07% per cycle after 500 cycles at 1 C, also demonstrating an excellent cyclic stability.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2022
·Vol. 14
·期 17
·1721-1729
·
IF 3.532
Di Deng,Xiaoyu Fang,Ding Duan,Kang Li
There is a critical need for the rapid detection of p-chlorophenol produced by pesticide abuse and industrial wastewater discharge, which has been an urgent problem in the realm of environmental protection. Here, a green and environmentally friendly method was developed to prepare stable and low toxicity quantum dots. First, blue-green fluorescent FeS2 quantum dots (B-FeS2 QDs) were prepared with FeCl3·6H2O (an iron source) and L-cysteine (a capping agent) by the solvothermal method. By combining B-FeS2 QDs with orange carbon dots (O-CDs), a CDs@SiO2/FeS2@MIPs visual fluorescence sensor for the selective detection of p-chlorophenol was constructed. Under optimum conditions, this sensor exhibited a detection limit of 1.265 μM with a linear range of 5.00–50.00 μM and was successfully applied to detect p-chlorophenol in real samples. Moreover, this sensor was successfully applied to visual semi-quantitative detection of p-chlorophenol. This work demonstrated that these sensors, based on FeS2 QDs and CDs, had potentials for in situ and visual detection of environmental contaminants.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 7
·期 2
·394-401
·
IF 5.934
Yushan Luo,Mengli Tao,Jianhua Deng,Renming Zhan,Bingshu Guo,Qianru Ma,Muhammad Kashif Aslam,Yuruo Qi,Maowen Xu
K-ion batteries (KIBs) are considered as one of the most promising devices for large-scale energy storage because of the comparable output voltage with lithium-ion batteries and the abundant reserves of potassium. FeS2 is regarded as a kind of very important anode material for KIBs due to its low cost and high capacity. However, the poor electronic conductivity and huge volume expansion of FeS2 during the discharge/charge process strongly inhibit the K-storage performance. To solve these problems, herein, unique core–shell FeS2@C nanocubes with nanoparticles in the interior and carbon shells in the exterior are designed. The inside FeS2 nanoparticles are beneficial for K+ diffusion and the penetration of the electrolyte, while the outside carbon shells can enhance the electronic conductivity and suppress the volume expansion. The unique core–shell structure displays outstanding K-storage performance with impressive specific capacity, excellent cycling stability, and superior rate capability with 73% capacity retention at 2 A g−1. This work not only provides solutions to obtain a superior anode material for KIBs but also offers insights into designing a hierarchical structure for energy storage systems.
研究领域:
材料科学
·
能源化学
·
纳米技术
·
电化学储能
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2023
·
IF 2.8
Yajing Wang,Quanxi Zhu,Taiping Xie,Yuan Peng,Jiankang Wang,Zhongping Yao
Developing a highly efficient Fenton-like catalyst working in a wide pH range is imperative to accomplish its practical wastewater treatment. Herein, FeS2/FeSxOy catalyst was synthesized by hydrothermal-solvothermal vulcanization with thioacetamide as a sulfur source. Characterization results confirmed FeS2/FeSxOy consisted of pyrite, kornelite, and szomolnokite. FeS2/FeSxOy exhibited superior catalytic activity toward H2O2 activation with more than 96% phenol removal within 5 min in pH 3.0 ∼ 8.0 at 30°C. Radical scavenging experiment and EPR analysis revealed both hydroxyl radicals (·OH) and superoxide anion radicals (O2·-) anticipated in phenol elimination, but ·OH played a dominant role. The detailed degradation experiments and density functional theory (DFT) calculation confirmed the vital role of FeS2 in enhancing phenol abatement. This study not only developed a highly active catalyst for H2O2 activation but also theoretically analyzed the FeS2 function in depth, which provided a guide for designing a highly efficient Fenton-like catalyst.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Qingtian Li,Tao Wang,Baiyu Guo,Xin Qiao,Xing Meng,Di Jin,Hailong Qiu
As a conversion-type cathode material, FeS 2 emerges as a promising candidate for the next generation of energy storage solutions, attributed to its cost-effectiveness, environment-friendliness and high theoretical capacity. However, several challenges hinder its practical application, including sluggish kinetics, insulating reaction products and significant volume fluctuation during cycling, which collectively compromise its rate capability and cycle stability. Herein, a well-designed sandwich structure of FeS 2 embedded between graphite layers (FeS 2 /C) is obtained using a chloride intercalation and sulfidation strategy. The layered graphite-FeS 2 -graphite configuration boosts the active sites and adsorption capacity of Li + , thereby guaranteeing a high reversible capacity. Furthermore, the graphitic carbon matrix serves a dual purpose: it enhances electronic conductivity and restrain the volume fluctuation of FeS 2 during long cycling. This combination ensures robust electrochemical kinetics, structural integrity and long life. Consequently, the FeS 2 /C composites exhibit exceptional lithium storage performance, achieving capacities of 506.2 mAh g −1 at 0.5 A/g and 277.2 mAh g −1 at 5.0 A/g. Additionally, the FeS 2 /C composites show promising potential as cathodes for all solid-state lithium batteries, showcasing high specific capacities of 658.0 mAh g −1 at 0.1 A/g for the second cycle and maintaining a cycle performance of 288.5 mAh g −1 after 800 cycles at 0.5 A/g. These values surpass the second discharge specific capacity of 96.1 mAh g −1 and cycle capacity of 25.3 mAh g −1 observed for Fe 2 O 3 /C composites. The discharge mechanism of FeS 2 /C composites was further characterized through in-situ transmission electron microscope test. This work provides valuable insights for designing and synthesizing FeS 2 , highlighting its potential for lithium ion storage and all solid-state lithium batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Ying Li,Shijun Zhu,Yao Xu,Riyue Ge,Jiangtao Qu,Mingyuan Zhu,Yang Liu,Julie M. Cairney,Rongkun Zheng,Sean Li,Jiujun Zhang,Wenxian Li
High–performance composite electrocatalysts of g–C 3 N 4 /FeS 2 /MoS 2 for hydrogen evolution reaction (HER) is synthesized by the growth of molybdenum disulfide (MoS 2 ) nanosheets from ferrous disulfide (FeS 2 ) sites supported on graphite–like carbon nitride (g–C 3 N 4 ) substrates. The high conductivity of such composite catalysts is induced by the Fe S bond between FeS 2 and MoS 2 and Fe N bond between FeS 2 and g–C 3 N 4 . These two bonds of Fe S and Fe N can have a bridging function to provide efficient charge transfer channels between g–C 3 N 4 and MoS 2 via chemical bonding rather than physical attachment. Furthermore, the FeS 2 sites can prevent the agglomeration of MoS 2 nanosheets and also seed the MoS 2 to form highly dispersed vertical growth nanosheets with more exposed edging active sites. As a result, this g–C 3 N 4 /FeS 2 /MoS 2 catalyst exhibits both high catalytic HER activity and stability.
研究领域:
材料科学
·
电化学
·
能源催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xinyu Zhou,Ziwei Wang,Yajun Wang,Fan Du,Yinhuan Li,Yaqiong Su,Mingyue Wang,Mingming Ma,Guorui Yang,Shujiang Ding
Pyrite FeS 2 now emerges as a promising anode for potassium-ion batteries (PIBs) due to its low cost and high theoretical capacity. However, the significant volume expansion, low electrical conductivity, and the ambiguous mechanism related to potassium storage severely hinder its development for PIBs anodes. Herein, FeS 2 nanostructures are skillfully dispersed on the graphene surface layer by layer (FeS 2 @C-rGO) to form a sandwich structure by using Fe-based metal organic framework (Fe-MOF) as precursors. The unique structural design can improve the transfer kinetics of K + and effectively buffer the volume expansion during cycling, thereby enhancing the potassium storage performance. As a result, the FeS 2 @C-rGO delivers a high capacity of 550 mAh/g at a current density of 0.1 A/g. At a high rate of 2 A/g, the capacity can maintain 171 mAh/g even after 500 cycles. Moreover, the electrochemical reaction mechanism and potassium storage behavior are revealed by in-situ X-ray diffractionand density functional theory calculations. This work not only provides a novel insight into the structural design of electrode materials for high-performance PIBs, but also proposes a valuable understanding of the potassium storage mechanism of the FeS 2 -based anode.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Menghang Sun,Xinyu Zhou,Lili Li,Bo Wen,Yunzi Miao,Xiaofeng Liu,Wei Yan,Guorui Yang,Shujiang Ding
Recycling spent cathode materials is crucial for sustainably developing lithium-ion battery technology. To achieve the high-value utilization of spent LiFePO 4 (LFP) cathodes, this paper proposes a method for preparing MIL-100(Fe) based on solid waste residues from spent LFP cathodes. R-FeS 2 @C derived from MIL-100(Fe) can serve as an anode material for potassium-ion batteries featuring a porous structure. Electrochemical tests demonstrate that the R-FeS 2 @C exhibits more stable cycling performance compared with the FeS 2 @C derived from the traditional MIL-100(Fe), reaching 525 mAh g −1 after 100 cycles at a current density of 100 mA g −1 . Impressively, R-FeS 2 @C also showcases excellent rate performance (343 mAh g −1 specific capacity at 5 A g −1 ). Furthermore, full cells assembled with PI@rGO cathodes also exhibit excellent rate performance and stable cycling performance. The porous structure of R-FeS 2 @C provides numerous voids to accommodate volume changes and introduces sufficient channels for electrolyte penetration. The higher carbon content enhances the electrical conductivity improving the kinetics of the K + migration reaction. These researches can provide guidance for the recycling of spent lithium-ion batteries and the design of sulfide electrodes for PIBs.
研究领域:
材料科学
·
能源存储技术
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 28
·9804-9810
·
IF 4.174
Guoteng Zhang,Zaitao Hao,Jie Yin,Chen Wang,Jinghao Zhang,Zhiyu Zhao,Denghu Wei,Huawei Zhou,Zhongcheng Li
The control of surface elements and nanostructures is one of the effective ways to design and synthesize high performance catalysts. Herein, we, for the first time, prepare FeS2 crystal lattices on WS2 nanosheets (FeS2 CL@WS2 NS) by solvothermal methods for the oxygen evolution reaction (OER). The FeS2 CLs effectively prevent the oxidation and aggregation of WS2 nanosheets and increase the electrochemically active surface area. The abundant surface defect in the FeS2 CL@WS2 NS electrocatalyst reduces the stress between the crystal lattices of FeS2 and that of WS2. The overpotential (260 mV) of the FeS2 CL@WS2 NS electrocatalyst for the OER at a current density of 10 mA cm−2 is superior to those of WS2 NS/Ni foam (310 mV) and IrO2/Ni foam (300 mV) in 1.0 M KOH solution. An electrochemical–kinetic study shows that the Tafel slope of 54 mV per decade for the FeS2 CL@WS2 NS electrocatalyst is lower than those of WS2 NS (102 mV per decade) and IrO2/Ni foam (77 mV per decade). In addition, the charge transport resistor (2.3 Ω) of the FeS2 CL@WS2 NS electrocatalyst for the OER is smaller than that of WS2 NS. These faster kinetic properties, in turn, explain the high catalytic activity of the FeS2 CL@WS2 NS electrocatalyst for the OER. The XPS and HRTEM results of the post stability sample confirm that Fe2+ and W4+ are oxidized after durability measurement. Thus, we think that the FeS2 CL@WS2 NS electrocatalyst is a promising candidate for efficient, low-cost, and stable non-noble-metal-based OER electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Zijian Liao,Mingliang Ma,Zhouyu Tong,Yuxin Bi,Kwok L. Chung,Mingtao Qiao,Yong Ma,Aijie Ma,Guanglei Wu,Zongxuan Li,Yu Zhang
In this work, one-dimensional (1D) ZnFe 2 O 4 @carbon@MoS 2 /FeS 2 composites were synthesized by hydrothermal method , magnetic-field-induced distillation-precipitation polymerization and high-temperature carbonization . The structure, morphology, composition , magnetic performance and electromagnetic (EM) wave absorbing properties of the composites were systematically studied. The composites show strong microwave absorption (MA) capacity with a minimum reflection loss (RL min ) value of −52.5 dB at 13.2 GHz, and have an effective absorption frequency range of 10.10–15.08 GHz with a bandwidth of 4.98 GHz when the thickness is 2.23 mm. It is expected that as-synthesized 1D ZnFe 2 O 4 @carbon@MoS 2 /FeS 2 composites can be a promising EM wave absorption material.
研究领域:
材料科学
·
电磁学
✓ 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）