MOLECULES
·
2024
·Vol. 29
·期 5
·951
·
IF 4.2
Tingxia Wang,Xu Zhang,Xiaojiao Yu,Junpeng Li,Kai Wang,Jinfen Niu
A bifunctional electrocatalyst with high efficiency and low costs for overall water splitting is critical to achieving a green hydrogen economy and coping with the energy crisis. However, developing robust electrocatalysts still faces huge challenges, owing to unsatisfactory electron transfer and inherent activity. Herein, NiFe LDH/NiS2/VS2heterojunctions have been designed as freestanding bifunctional electrocatalysts to split water, exhibiting enhanced electron transfer and abundant catalytic sites. The optimum NiFe LDH/NiS2/VS2electrocatalyst exhibits a small overpotential of 380 mV at 10 mA cm−2for overall water splitting and superior electrocatalytic performance in both hydrogen and oxygen evolution reactions (HER/OER). Specifically, the electrocatalyst requires overpotentials of 76 and 286 mV at 10 mA cm−2for HER and OER, respectively, in alkaline electrolytes, which originate from the synergistic interaction among the facilitated electron transfer and increasingly exposed active sites due to the modulation of interfaces and construction of heterojunctions.
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
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2021
·Vol. 21
·期 4
·2117-2122
·
IF 0
Peng Zehui,Xue Yumeng,Gao Yuan,Wang Ka,Song Haizeng,Yan Shancheng
Heavy metal Cadmium (Cd) will continuously pollute the atmosphere, soil and various water environments through material circulation, and even pose a threat to human safety. It has been designated as a first-class pollutant in sewage by China, therefore there is an urgent need to find
new, more effective, and low-cost method to accurately detect Cadmium ion (Cd2+) concentration. We experimentally prepared a new Cd2+ sensor based on NiS2 nanomaterials capable of measuring Cd2+ concentration. The corresponding relationship between
over potential of NiS2 nanomaterials in H2SO4 electrolyte solutions with different Cd2+ concentration and reduction peak with change of Cd2+ concentration was obtained by electrochemical method.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Xun He,Long Hu,Lisi Xie,Zerong Li,Jie Chen,Xiuhong Li,Jun Li,Longcheng Zhang,Xiaodong Fang,Dongdong Zheng,Shengjun Sun,Jing Zhang,Abdulmohsen Ali Alshehri,Yongsong Luo,Qian Liu,Yan Wang,Xuping Sun
Nitrite (NO 2 − ), as a N -containing pollutant, widely exists in aqueous solution, causing a series of environmental and health problems. Electrocatalytic NO 2 − reduction is a promising and sustainable strategy to remove NO 2 − , meanwhile, producing high value-added ammonia (NH 3 ). But the NO 2 − reduction reaction (NO 2 − RR) involves complex 6-electron transfer process that requires high-efficiency electrocatalysts to accomplish NO 2 − -to-NH 3 conversion. Herein, we report NiS 2 nanoparticles decorated TiO 2 nanoribbon array on titanium mesh (NiS 2 @TiO 2 /TM) as a fantastic NO 2 − RR electrocatalyst for ambient NH 3 synthesis. When tested in NO 2 − -containing solution, NiS 2 @TiO 2 /TM achieves a satisfactory NH 3 yield of 591.9 µmol h −1 cm −2 and a high Faradaic efficiency of 92.1 %. Besides, it shows remarkable stability during 12-h electrolysis test.
研究领域:
环境科学
·
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
·
2020
·
IF 7.489
Ke Li,Jun Xu,Chan Chen,Zhizhog Xie,Dan Liu,Deyu Qu,Haolin Tang,Qiang Wei,Qibo Deng,Junsheng Li,Ning Hu
Electrocatalytic hydrogen evolution reaction (HER) is a green approach to produce high-quality hydrogen fuel . Developing efficient electrocatalyst is the key to realize cost-effective HER. Pt is the state-of-the-art HER catalyst so far. However, the use of Pt for HER is limited by its high cost. Thus, it is essential to lower down the usage of Pt in the electrocatalyst by improving the intrinsic activity of Pt. In this work, we propose to achieve this goal by introducing synergistic interaction between Pt and substrate material (NiS 2 ). The favorable synergy interaction can modify the d band structure of Pt (1 1 1) facet and modulate the hydrogen adsorption on Pt (1 1 1), which enhances the intrinsic electrocatalytic activity of Pt. The effectiveness of this strategy is demonstrated with both experimental and theoretical investigations.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yu Xiang,Qingping Li,Xijun Wei,Xiaoyan Li,Qiaoji Zheng,Yu Huo,Dunmin Lin
Reasonable design and synthesis of anode materials with high capacity, excellent rate capability and good cycling stability is vital for the pragmatic application of sodium-ion batteries (SIBs). Transition metal chalcogenides possess immense potential on account of their distinguished redox reversibility and high theoretical specific capacity. Herein, the hollow metal sulfide/metal selenide (NiS 2 /NiSe 2 ) heteroboxes with rich phase boundaries have been manufactured as anode for SIBs. The lattice distortion and charge redistribution at the phase boundary of the as-prepared NiS 2 /NiSe 2 heteroboxes can expose more active sites, which is profitable to the adsorption of Na + and accelerate the sodium storage kinetics process, and the unique hollow porous structure is conducive to buffering the volume expansion and can facilitate the penetration of electrolyte during the repeated Na + de-intercalation process. By virtue of these advantages, the NiS 2 /NiSe 2 heteroboxes delivers a good rate capability, where the average capacity at 10 A g - 1 in comparison with 0.1 A g - 1 is 64.3%. Otherwise, it exhibits an ultralong reversible capacity of 292 mA h g - 1 after 2000 cycles at 10 A g - 1 with only 0.0125% average capacity decay per cycle. The rational construction of phase boundary with unique structure in this article has guiding significance for the manufacture of progressive SIBs anode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 16
·3892
·
IF 4.2
Bin Yang,Xinyao Ding,Lifeng Feng,Mingyi Zhang
The development of efficient and cost-effective electrocatalysts is crucial for achieving a green hydrogen economy through electrocatalytic water splitting. Herein, we report an excellent catalyst, one-dimensional NiS2/NiS/Mn2O3nanofibers prepared by electrospinning, which exhibits outstanding electrochemical performance in an alkaline solution. We explored effective strategies to construct one-dimensional nanostructures and composite oxides to promote the electrocatalytic performance of transition metal dichalcogenides. At a current density of 20 mA cm−2, it requires an overpotential of 333 mV for OER. Furthermore, NiS2/NiS/Mn2O3nanofibers maintain good durability even after 1000 cycles. The long-term electrochemical stability test of the catalyst NiS2/NiS/Mn2O3was implemented at 20 mA cm−2for 12 h. The potential remained at 99.52%. Therefore, this study demonstrates that NiS2/NiS/Mn2O3can serve as a viable green hydrogen production electrocatalyst.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 6
·833
·
IF 4.034
Zhi Zhang,Qi Lv,Yiwang Chen,Haitao Yu,Hui Liu,Guangzhen Cui,Xiaodong Sun,Ling Li
To reduce electromagnetic pollution as well as increase the accuracy of high-precision electronic equipment, more attention has been paid to new electromagnetic wave (EMW) absorbing materials, which have the advantages of strong absorption, wide absorption bands, and a narrow thickness. In this study, a novel ternary type of the NiS2@rGO/polypyrrole (PPy) sandwich-like structured composites was synthesized via a facile two-step method, in which the hydrothermal method was used to prepare NiS2@rGO binary composites and then the in situ polymerization method was used to synthesize the PPy, which acted as the outer layer of the sandwich-like structure. The morphologies and electromagnetic absorption performance of the NiS2@rGO/PPy were measured and investigated. A sample with 6 wt% NiS2@rGO/PPy loading paraffin-composite obtained an outstanding reflection loss (RL) of −58.7 dB at 16.44 GHz under a thickness of 2.03 mm. Simultaneously, the effective electromagnetic wave absorption bandwidth for RL < −10 dB, which covered 7.04 to 18.00 GHz (10.96 GHz), was achieved by changing the thickness of the absorber from 2.0 to 3.5 mm. The results not only suggest that the NiS2@rGO/PPy composite has excellent performance in the field of EMW absorption but also prove that the novel sandwich-like structure can contribute to appropriate impedance matching through multiple relaxation and interfacial polarization processes.Keywords:graphene;polypyrrole;sandwich-like structure;electromagnetic absorption
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
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
ACS Applied Nano Materials
·
2025
·
IF 5.5
Yi Yu,Wenbin Luo,Zhen Zhang,Ying Feng,Jian Li,Mingyu Zheng,Zisheng Chao,JinCheng Fan
Aluminum batteries (ABs) have recently become a type of battery technology that has attracted much attention due to their advantages such as abundant resources and high theoretical capacity. However, the development of ABs is limited by the inherent characteristics of the positive electrode materials, so finding high-performance positive electrode materials has become a top priority in research. Transition metal sulfides/selenides, as positive electrode materials for ABs, offer notable benefits such as high specific capacity and long cycle life, showing great application potential. In this study, a nanoscale porous dodecahedral NiS2/NiSe2 heterojunction was designed and prepared for an ABs positive electrode. The unique heterojunction structure generates a built-in electric field, which facilitates the transport of electrons and ions and improves the reaction kinetics. Nanoparticles can provide a larger specific surface area, while the porous structure supports buffering volume expansion and promotes electrolyte infiltration, thereby improving the electrochemical performance. Experimental results show that the NiS2/NiSe2 heterojunction exhibits a notable initial capacity of 375.5 mAh/g within the voltage range of 0.01–2.3 V, and it can still maintain 81.1 mAh/g after 400 cycles. This research provides ideas for developing a high-performance positive electrode for ABs.
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 Central South University
·
2025
·Vol. 32
·期 4
·1272-1283
·
IF 4.4
Song Ren-hong,Hu Jing,Li Xiao,Guo Hao,Zhang Wen,Tian Qian-qiu,Hu Wen-bin
As a cathode material for thermal batteries, NiS 2 has a high theoretical capacity but low thermal stability. Besides, the poor formability of NiS 2 powders also restricts the cathode performance of thermal batteries. In this paper, the novel NiS 2 /SiO 2 composite material was developed by high temperature vulcanization to improve the thermal stability formability of NiS 2 . The good filling and lubrication of spherical SiO 2 can improve the thermal conductivity of NiS 2 electrode. The discharge test shows that the NiS 2 /SiO 2 cathode has a stable discharge voltage at a current density of 200 mA/cm 2 , and the activation time is shortened by nearly 20% compared with the NiS 2 cathode. In addition, due to the favorable thermal insulation protection of SiO 2 , the initial decomposition temperature of NiS 2 is increased by 30 °C after the addition of SiO 2 . The incorporation of SiO 2 not only effectively improves the thermal stability and electrochemical properties of NiS 2 , but also improves the cold pressing forming performance of the NiS 2 powder. Therefore, the novel NiS 2 /SiO 2 composite material is more suitable for thermal batteries with high stability and fast response, which is of great significance for improving the maneuverability and quality reliability of weapons and equipment.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Shuangyue Hou,Yue Lian,Zongying Xu,Dawei Wang,Chaolei Ban,Jing Zhao,Huaihao Zhang
the ball-flower like composite (NiS 2 @MoS 2 ) was successfully synthesized by a convenient two-step hydrothermal method using Ni(NO 3 ) 2 ·6H 2 O and (NH 4 ) 6 Mo 7 O 24 ·4H 2 O as precursors. MoS 2 nano-sheets, uniformly generated on NiS 2 surface, increases the surface roughness and porosity, and accelerates the electrons and ions transfer of the composite. The synergistic effect of Mo and Ni improves the conductivity of the materials. Furthermore, by controlling the atomic ratio of Mo to Ni in precursors, the composite MN-1 (the molar ratio of MoS 2 to NiS 2 is 1:1) with the best capacity performance was obtained. The morphology and composition were characterized by a variety of means, such as TEM, SEM, XPS, XRD, BET and EDX. The electrochemical measurement results exhibited high specific capacity (848.2 C g −1 at specific current of 1 A g −1 ) and good cycling stability (83.1% specific capacity retention after 10000 GCD cycles) of MN-1 in 6 M KOH. Furthermore, an asymmetric supercapacitor was assembled with MN-1 as positive electrode and activated carbon as negative electrode. When the power density is 0.8 kW kg −1 , its energy density reaches up to 37.2 Wh kg −1 . The present work may offer new design strategy for electrode materials .
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
·
2014
·
IF 4.086
Chun Tang,Zonghua Pu,Qian Liu,Abdullah M. Asiri,Xuping Sun
In this paper, we demonstrate the first preparation of NiS 2 nanosheets array on carbon cloth (NiS 2 NA/CC) via sulfidization of its Ni(OH) 2 NA/CC precursor. As a 3D hydrogen evolution cathode, the NiS 2 NA/CC electrode shows excellent catalytic activity and stability in neutral solutions. It needs overpotentials of 193 and 243 mV to afford current densities of 2 and 10 mA/cm 2 , respectively. This electrode also works efficiently in basic solutions.
研究领域:
材料科学
·
电化学
✓ 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）