RSC Advances
·
2018
·Vol. 8
·期 50
·28684-28691
·
IF 2.936
Ka Wang,Weilan Guo,Shancheng Yan,Haizeng Song,Yi Shi
The traditional method of preparing hydrogen and oxygen as efficient clean energy sources mainly relies on the use of platinum, palladium, and other precious metals. However, the high cost and low abundance limit wide application of such metals. As such, one challenging issue is the development of low-cost and high-efficiency electrocatalysts for such purposes. In this study, we synthesized Co–FeS2/CoS2 heterostructures via a hydrothermal method for efficient hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Benefitting from their unique three-dimensional hierarchical nanostructures, Co-doped FeS2, and CoS2 formed heterostructures on Co–FeS2 petals, which bestowed remarkable electrocatalytic properties upon Co–FeS2/CoS2 nanostructures. Co–FeS2/CoS2 effectively catalyzed the OER with an overpotential of 278 mV at a current density of 10 mA cm−2 in 1 M KOH solution, and also is capable of driving a current density −10 mA cm−2 at an overpotential of −103 mV in 0.5 M H2SO4 solution. The overpotential of the OER and HER only decreased by 5 mV and 3 mV after 1000 cycles. Our Co–FeS2/CoS2 materials may offer a promising alternative to noble metal-based electrocatalysts for water splitting.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 6
·e202304564
·
IF 1.9
Ke Li,Zhifang Li,Jinxing Cui,Boyang Zhou,Weiwei Dong,Boxuan Zhang,Changlong Yang
Graphical PANI/FeS 2 /MnO 2 composite electrode materials were successfully prepared. The results showed that the specific capacitance of PANI/FeS 2 /MnO 2 4 : 1 : 3 was 580 F/g at 1 A/g, and the capacitance retention rate was 85.2 % after cycling 10,000 times at 5 A/g. The asymmetric supercapacitor PANI/FeS 2 /MnO 2 4 : 1 : 3 //AC had an energy density of 37.93 Wh/kg at a power density of 0.85 kW/kg. Polyaniline (PANI) has unique physical and chemical peculiarities, so it has been widely researched in the field of energy storage. However, its structure is easy to be damaged during charging and discharging, which seriously affects its application. PANI/FeS 2 /MnO 2 composite materials were successfully prepared by an easy combination of chemical precipitation and chemical oxidative polymerization. The electrochemical test results manifested that the specific capacitance of PANI/FeS 2 /MnO 2 4 : 1 : 3 was 580 F/g at 1 A/g, and had great cyclic stability (capacitance retention rate was 85.2 % after 10000 cycles at 5 A/g). It was because that reticular structure shortened the ion transport path. On the other hand, it was able to effectively mitigate the volume change during long-term charging and discharging, thus improving the cycling stability. In addition, PANI/FeS 2 /MnO 2 4 : 1 : 3 as the positive and activated carbon (AC) as the negative, an asymmetrical supercapacitor was assembled with a maximal energy density of 37.93 Wh/kg when its power density was 0.85 kW/kg. At the same time, the device possessed a long cycle life (the capacitance conservation rate was 82 % after 5000 cycles at 5 A/g). This excellent performance is due to the excellent synergy between the PANI, FeS 2 and MnO 2 . This study opens a new way to investigate polyaniline-based composite electrode materials.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Jialong Wang,Longbin Chen,Yaodong Yang,Tiancheng Hou,Wei-Feng Rao
Piezoelectric catalytic seawater hydrogen production is one of the most crucial and potential hydrogen production strategies. However, the low surface activity and the high carrier recombination rate limit the further improvement of catalytic efficiency. To solve this problem, we prepared SrBi 4 Ti 4 O 15 (SBTO) and FeS 2 (FS) heterojunctions, which can effectively utilize the valence state transformation cycle between Fe 2+ and Fe 3+ to improve the surface activity and maintain carrier separation. This mechanism of Fe 2+ and Fe 3+ conversion is similar to the well-known Fenton reaction. It was confirmed by electrochemical measurements that with the help of FeS 2 , SBTO possessed a stronger piezoelectric current response and faster carrier transfer rate. Piezoelectric catalytic seawater splitting H 2 evolution rate of SBTO-25 %FeS 2 could reach 31 mmol g -1 h −1 , which is higher than that of other piezoelectric materials in similar conditions. Our findings provide valuable insights for further improving the efficiency of seawater hydrogen production efficiency.
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
RSC Advances
·
2014
·Vol. 5
·期 4
·2449-2456
·
IF 3.708
Wanpeng Liu,Lili Xu,Xingfa Li,Chensi Shen,Sadia Rashid,Yuezhong Wen,Weiping Liu,Xiaohua Wu
A high-dispersive FeS2 micro-cube crystal on graphene oxide (FeS2@GO) was fabricated by a one-pot hydrothermal method. The catalytic degradation of 4-chlorophenol (4-CP) and its mechanism in a FeS2@GO-based Fenton system was investigated. Under acidic to slight alkaline conditions, FeS2@GO demonstrated an excellent capacity to remove 4-CP. More than 97% of 4-CP was eliminated within 60 min in pH 7.0 reaction solutions initially containing 0.2 g L−1 FeS2@GO, 128.6 mg L−1 4-CP and 100 mM H2O2 at 25 ± 1 °C, and the removal of 4-CP was further enhanced with increasing FeS2@GO loadings. In the meantime, the FeS2@GO also achieved lower iron leaching and a more complete TOC removal compared with pure synthetic FeS2 without graphene oxide. Furthermore, acetic acid and oxalic acid were identified as the primary products. The remarkable capacity of the FeS2@GO-based Fenton system in removing 4-CP displays its potential application in the treatment of organic compound-contaminated water.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MRS Communications
·
2021
·Vol. 11
·期 4
·418-424
·
IF 2.566
Liu Heguang,Jing Ruixuan,Wang Zilu,You Caiyin
Abstract FeS 2 is thought to be a kind of promising anode materials used for lithium-ion batteries (LIBs), but the intrinsic low electrical conductivity and remarkable volume change hinder its practical application. In the present work, we proposed a strategy by introducing mesoporous carbon (MPC) to obtain a FeS 2 /MPC composite electrode for LIBs. The FeS 2 /MPC composite was prepared by hydrothermal method. The results indicated that the FeS 2 /MPC composite electrode exhibited better electrochemical performance than pristine FeS 2 . Especially, the discharge capacity of composite electrode reached 650 mAh g −1 at 0.5 C current density, and this was significantly higher than that of pristine FeS 2 . Graphic abstract
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
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Sheng Pang,Zhenqian Zhang,Liangwei Cong,Youpeng Xu,Guoyu Qian,Dong Wang,Laishi Li,Yusheng Wu,Zhi Wang
The conventional method for synthesizing Ti 2 SC depends on the reaction between TiS and TiC, which requires the utilization of costly Ti, TiC, or TiS 2 powders. Utilizing TiO 2 as the raw material for the synthesis of Ti 2 SC enables the cost-effective preparation of this compound. However, the optimization of the TiO 2 /C/X n S m (sulfides) system is of utmost importance when aiming to synthesize Ti 2 SC through carbothermal-sulfurization of TiO 2 , as the formation temperature of TiS and TiC greatly depends on the X n S m . In this study, the identification of the thermodynamically dominant region for the formation of TiS and TiC in the TiO 2 /C/X n S m systems was conducted by utilizing various sulfides (63 types). Considering factors such as the challenges associated with removing by-products, accessibility, and toxicity, FeS 2 was ultimately chosen as a highly promising candidate. Thanks to the low melting point of FeS 2 , Ti 3 O 5 , the preliminary carbothermal reduction product of TiO 2 , has achieved rapid-deep deoxidation and phase reconstruction processes in the molten phase. Meanwhile, unlike the conventional solid-solid sintering reaction , which often results in residual reactants that are challenging to eliminate. This novel one-step phase transformation process that occurs in the molten phase exhibits minimal impurity phases, apart from the by-product Fe. Ti 2 SC with a purity greater than 99 wt% was obtained when the TiO 2 /C/FeS 2 was pickled to remove Fe after sintering at 1600 °C for 5 min. This work will provide the theoretical basis and a new path for the low-cost preparation of sulfur-containing MAX phases.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2024
·
IF 16.8
Shuai Li,Hongyu Liu,Luojia Zheng,Chuntao Ma,Hailong Yu,Xiaodong Wu,Xiaobin Niu,Liping Wang
As the “blood” of batteries, the electrolyte is generally expected to be designed reasonably to meet the demands of stable energy storage in high energy density batteries. This study introduces a rational design for localized high-concentration electrolytes (LHCEs) by incorporating the weakly coordinating diluent 1, 1, 2, 2-tetrafluoro-1-methoxyethane (TFM) to modulate the solvation of Li + alongside the anion and solvent 1, 2-diethoxyethane (DEE). The resulting LiFSI-DEE/2TFM electrolyte (1 M LiFSI in DEE/TFM at a ratio of 1:2, volume) demonstrates a significant efficacy in suppressing the dissolution of lithium polysulfides (LiPSs) while maintaining a good ionic conductivity. Moreover, this electrolyte facilitates the formation of a stable cathode-electrolyte interphase (CEI) and promotes uniform plating/stripping of Li + at the lithium anode. Consequently, based on this electrolyte, the Li/FeS 2 cells exhibit an exceptional specific capacity and a good cycling stability from room temperature to −20°C. Notably, even at −20°C, over 80 % of the room-temperature specific capacity (692.7 mAh g −1 @150th) is retained for the cell using LiFSI-DEE/2TFM, showing its robust performance in challenging environments. Furthermore, the Li/FeS 2 cell also demonstrates an outstanding durability at high current density (≥ 2 C) under room temperature.
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
·
2019
·
IF 8.355
Fei Wang,Wenlong Zhang,Haihui Zhou,Hong Chen,Zhongyuan Huang,Zhanheng Yan,Rujia Jiang,Chuqing Wang,Zhong Tan,Yafei Kuang
Pyrite (FeS 2 ) is considered to be one of the most promising anode materials for sodium ion batteries (SIBs) due to its high theoretical capacity, natural abundance, low cost and low toxicity, but the commercial process of FeS 2 is always limited by its low conductivity and volume expansion during the charge-discharge process. Herein, a three-dimensional porous composite (FeS 2 -C/RG) is constructed using FeS 2 -C nanoparticles and reduced graphene oxide through one-step vulcanization of PB (Prussian blue)/GO (graphene oxide) gel. As the anode material of SIBs, FeS 2 -C/RG exhibits high electrochemical performance benefiting from the unique three dimensional structure and small FeS 2 -C nanoparticles. The initial specific capacity can reach 1196 mAh g −1 at 0.1 A g −1 and it can still remain 543.0 mAh g −1 after 100 cycles at 0.5 A g −1 . Even at 6 A g −1 , the capacity could maintain 291.7 mAh g −1 after 1000 cycles. The excellent rate and cycling performance of FeS 2 -C/RG indicate it is a promising anode material for rechargeable SIBs.
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
Energy Technology
·
2020
·Vol. 8
·期 10
·2000544
·
IF 3.404
Xuexia Liu,Limin Liu,Weiwei Yan,Yinfeng Wang,Chunfang Huang,Zhijun Wang
Iron-based materials are ideal faradaic electrodes for supercapacitors. However, boosting the specific capacitance and preparation with the simple method of iron-based materials remains a great challenge. Herein, hierarchical Fe 3 O 4 @FeS 2 nanocomposites are constructed through an annealing strategy with monohydrate ferrous sulfate as the precursor. X-ray diffractometry, high-resolution transition electron, and X-ray photoelectron spectroscopy results reveal that the hierarchical Fe 3 O 4 @FeS 2 nanocomposite is successively fabricated. The as-prepared materials exhibit a remarkable specific capacitance of 597.1 F g −1 at a current density of 3 A g −1 as electrode materials of supercapacitors. Inspiringly, specific capacitance is superior to most iron-based electrodes in previous reports. This may be ascribed to the junction at the interface of the different components and the efficient electron transfer of FeS 2 . This work is meaningful for the design and preparation of electrode materials with specific capacitance.
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 COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Lin Jiang,Yifan Dou,Wei Song,Yu Feng,Jiahui Zhao,Lixin Zhang,Ruina Shi,Jing Song,Yan Qu,Lei Ji,Guisheng Qi,Dong Liang,Luchao Yue
Transition metal sulfides (TMS) are acknowledged as potential anode materials for sodium ion batteries (SIBs); however, their practical application is significantly hindered by suboptimal cycling durability and inadequate rate performance, primarily stemming from limited electronic conductivity and substantial volume swelling during the sodiation/desodiation process. Constructing heterojunction incorporating multiple active components has been emerged as an effective strategy to mitigate these limitations. In this study, high lattice matching FeS 2 /NiS 2 heterojunction nanoparticles anchored on a carbon skeleton (FeS 2 /NiS 2 @NC) were synthesized by a facile high-temperature pyrolysis and sulfidation process. The combination of experimental characteristics and theoretical simulations confirms that this unique heterojunction, characterized by an electric field at the interface, offers an adjustable electronic structure and strong Na + adsorption energy, thus expediting Na + diffusion kinetics. Consequently, the FeS 2 /NiS 2 @NC electrode demonstrates superior rate capabilities (491.2 mAh/g at 10.0 A/g) and enhanced cycling stability (490.8 and 274.7 mAh/g at 10.0 and 20.0 A/g over 5000 cycles) when employed as anode in SIBs. This research underscores the pivotal role of the heterointerface engineering in enhancing rechargeable battery performance and presents a promising avenue for optimizing the electrochemical properties of TMS.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Weichun Yang,Xiaomin Li,Dongdong Xi,Qi Li,Zhihui Yang,Xiaobo Min,Zhang Lin,Qi Liao
It is a challenge to simultaneously treat the combined pollutants of chromium(VI) (Cr(VI)) and organics (such as phenol) in wastewater. Here, a stable and efficient redox system based on FeS 2 sulfidated zero valent iron (FeS 2 /Fe 0 ) and persulfate (PS) was developed to synchronously remove Cr(VI) and phenol. 100% of phenol (10 mg/L) was oxidized in 10 min and Cr(VI) (20 mg/L) was completely reduced to Cr(III) in 90 min in the FeS 2 /Fe 0 +PS system with a pH range of 3.0–9.0, respectively. phenol was selectively oxidized without re-oxidizing Cr(III) in such system. The surface-bound Fe 2+ was the major reactive species to synchronously reduce Cr(VI) and oxidize phenol. The mechanisms were elucidated that the phenol degradation was accelerated by the generated Cr(III) complexing with its products, and that SO 4 2− , whose production speed was accelerated by the PS activation to oxidize phenol and FeS 2 , was conductive to corrode Fe 0 to regenerate the surface-bound Fe 2+ for reducing Cr(VI) and oxidizing phenol. It is potential to develop a high-performance and large-scaled FeS 2 /Fe 0 -based redox platform to remediate the complex pollution of Cr(VI) and organics.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Catalysis
·
2020
·
IF 12.35
Hai-Bin Wang,Jia-Qi Wang,Rui Zhang,Chuan-Qi Cheng,Kang-Wen Qiu,Yi-jie Yang,Jing Mao,Hui Liu,Miao Du,Cun-Ku Dong,Xi-Wen Du
Highly effective catalysts are of great importance for artificial nitrogen fixation. Inspired by the natural nitrogenase, we biomimetically designed an inorganic catalyst, Mo(IV)-doped FeS2, for electroreduction of dinitrogen to ammonia. The Mo(IV) ions favor the adsorption and activation of N2, while the FeS2 substrate depresses the competitive hydrogen evolution reaction, and the two factors jointly endow the catalyst with a high Faraday efficiency of 14.41% at −0.2 V versus RHE.
研究领域:
生物化学
·
材料科学
✓ 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）