JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 14
·13462-13473
·
IF 2.195
Zhan Jiang,Shan Lina,Sui Yanwei,Qi Jiqiu,Wei Fuxiang,He Yezeng,Meng Qingkun,Sun Zhi,Liu Jinlong
Flexible electrodes for preparing core–shell structures are receiving increasing attention. A composite electrode material with NiCo 2 S 4 as the core and Ni 3 S 2 as the shell was successfully synthesized by hydrothermal synthesis and electrodeposition method. The prepared flexible NiCo 2 S 4 @Ni 3 S 2 core/shell nanorod array has higher electrochemical performance, with specific capacitance of 5.714 F cm −2 at 2 mA cm −2 and excellent cycle stability. In addition, the prepared flexible hybrid supercapacitor has been assembled with NiCo 2 S 4 @Ni 3 S 2 as the positive electrode and Fe 2 O 3 -rGO as the negative electrode, delivering an energy density of 5.9 mWh cm −3 at 171 mW cm −3 . These results make the NiCo 2 S 4 @Ni 3 S 2 a high-performance supercapacitor application candidate.
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
Nanoscale
·
2021
·Vol. 13
·期 42
·17953-17960
·
IF 7.79
Yuanyuan Wu,Junqiang Yin,Wei Jiang,Hongji Li,Chunbo Liu,Guangbo Che
Developing efficient and promising non-noble catalysts that can promote both the HER and OER in the same electrolyte is vital. Currently, these reported bifunctional catalysts show only moderate electrocatalytic water-splitting performance, which is much lower than expected. In addition, most of these promising nonprecious electrocatalysts work well only at small current densities (e.g. 10 mA cm−1), but at large current densities their stability and activity are far from satisfactory for practical applications. Herein, we have successfully constructed an urchin-like Ni3S2@Ni3B heterostructure electrocatalyst on Ni plates. The resulting material exhibits great catalytic activities for both the HER and OER, even at large current densities, reaching a current density of 1000 mA cm−l at relatively low applied overpotentials of 517 and 632 mV, respectively. The excellent catalytic performance of Ni3S2@Ni3B/NP is found to benefit from the effective integration of the unique surface structure and the interface electronic structure.
研究领域:
电化学
·
材料科学
·
催化
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Chen Cheng,Dandan Li,Tao Zhao,Dong Wang,Dazhong Zhong,Genyan Hao,Guang Liu,Jinping Li,Qiang Zhao
A NiFe alloy was designed on nickel foam (NF) as a precursor using cathodic electrodeposition . NiFe 2 O 4 –Ni 3 S 2 nanorods (NRs) composite catalysts were prepared by Fe 3+ impregnation and further hydrothermal sulfuration methods. NiFe 2 O 4 –Ni 3 S 2 nanosheets (NSs) were also prepared by direct hydrothermal sulfuration of the NiFe alloy for comparison. Compared to the dense NS structure of the NiFe 2 O 4 –Ni 3 S 2 NSs/NF, the NiFe 2 O 4 –Ni 3 S 2 NRs/NF showed better oxygen evolution performance due to its unique weed-like NR array structure composed of additional oxygen evolution reaction (OER) active sites, with a strong electron interaction for Ni and Fe and the active sulfide synergistic effect with oxides . Therefore, Driving a current density of 10 mA cm −2 only requires an overpotential of 189 mV and the catalyst could provide 100 mA cm −2 continuously and be constant for more than 80 h in 1.0 M KOH. This experiment indicated that Fe 3+ immersion had an indirect regulating effect on the morphological growth of the catalyst, which provided a novel concept for designing better OER catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Liyan Wang,Xiangdong Xue,Qingjie Luan,Junzhen Guo,Liang Chu,Zhaokun Wang,Baozhen Li,Mu Yang,Ge Wang
Accelerating charge transfer efficiency by constructing heterogeneous interfaces on metal-based substrates is an effective way to improve the electrocatalytic performance of materials. However, minimizing the substrate-catalyst interfacial resistance to maximize catalytic activity remains a challenge. This study reports a simple interface engineering strategy for constructing Mo-Ni 9 S 8 /Ni 3 S 2 heterostructured nanoflowers . Experimental and theoretical investigations reveal that the primary role assumed by Ni 3 S 2 in Mo-Ni 9 S 8 /Ni 3 S 2 heterostructure is to replace nickel foam (NF) substrate for electron conduction, and Ni 3 S 2 has a lower potential energy barrier (0.76 to 1.11 eV) than NF (1.87 eV), resulting in a more effortless electron transfer. The interface between Ni 3 S 2 and Mo-Ni 9 S 8 effectively regulates electron redistribution, and when the electrons from Ni 3 S 2 are transferred to Mo-Ni 9 S 8 , the potential energy barriers at the heterogeneous interface are 1.06 eV, lower than that between NF and Ni 3 S 2 (1.53 eV). Mo-Ni 9 S 8 /Ni 3 S 2 -0.1 exhibited excellent oxygen evolution reaction (OER)/hydrogen evolution reaction (HER) bifunctional catalytic activity in 1 M KOH, with overpotentials of only 223 mV@100 mA cm −2 for OER and 116 mV@10 mA cm −2 for HER . Moreover, when combined with an alkaline electrolytic cell, it required only an ultra-low cell voltage of 1.51 V to drive a current density of 10 mA cm −2 . This work provides new inspirations for rationally designing interface engineering for advanced catalytic materials.
研究领域:
材料科学
·
电催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 45
·17283-17291
·
IF 4.569
Yaoxia Yang,Fengyao Guo,Lan Zhang,Xingwei Guo,Dangxia Wang,Ruiqing Niu,Haidong Yang,Jian Li,Guofu Ma,Ziqiang Lei
Developing efficient, environmentally friendly and cost-effective non-precious metal electrocatalysts for the oxygen evolution reaction (OER) is essential to alleviate the energy crisis and environmental pollution. Herein, we report a simple and practical method to prepare non-precious metal catalysts, namely iron-modulated Ni3S2 (Fe-Ni3S2/NF) on nickel foam, by growing a Ni-MOF directly on 3D porous conductive nickel foam, followed by the formation of Ni-MOF-based Prussian blue analogs (Ni-MOF@PBA) via in situ cation exchange reactions, which are further sulfidated to iron-modulated Ni3S2. Based on a series of characterization results, it is confirmed that iron acts as a modulator at the Ni active site, leading to electron depletion, thereby modulating the electron spin state and optimizing the binding energy of key reaction intermediates, resulting in highly exposed active sites and acceleration of OER reaction kinetics. The synthesized Fe-Ni3S2/NF exhibits excellent activity in alkaline media, which needs overpotentials of only 232 mV and 287 mV to drive current densities of 10 mA cm−2 and 50 mA cm−2, respectively. Additionally, Fe-Ni3S2/NF exhibits excellent stability for at least 24 h during the OER process. This work presents a rational design and synthesis of transition metal-based catalysts with nanocone structures, providing a new strategy for assembling advanced materials and insights for exploring various energy storage and conversion systems.
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Leran Liu,Yijie Zhang,Jinwei Wang,Rui Yao,Yun Wu,Qiang Zhao,Jinping Li,Guang Liu
Industrial electrolysis of water is one of the effective strategies for green hydrogen production in the future. Nevertheless, the large-scale applications of water electrolysis are still intractable issues hindered by the high overpotentials and inferior reaction kinetics on the anode. Herein, a facile one-step hydrothermal method was applied to in situ growth the Fe and V co-doped Ni 3 S 2 electrocatalyst on nickel foam substrate (Fe, V–Ni 3 S 2 /NF). In 1 M KOH electrolyte, the as-prepared Fe, V–Ni 3 S 2 /NF electrode exhibited an improved water oxidation activity with ultralow overpotentials of 253 and 370 mV to realize large current densities of 100 and 1000 mA/cm 2 , respectively. More importantly, the Fe, V–Ni 3 S 2 /NF electrode existed an activation process during 100 h chronopotentiometry testing period. Detailed characterizations revealed that elements of V and S in the electrocatalyst were oxidized and dissolved into the electrolyte, making the electrocatalyst undergo surface reconstruction and resulting in a faster kinetic reaction rate, thus leading to enhanced oxygen evolution reaction activities. Collectively, the resultant Fe, V–Ni 3 S 2 /NF in this work provides new cogitation towards design and synthesis of low-cost electrocatalyst with large current densities for water oxidation.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
IONICS
·
2025
·
IF 2.6
Yu Kaifeng,Gong Yanan,Hui A. O.,Liang Ce,Li Yi
Transition metal sulfides exhibit a high theoretical specific capacity and have great potential to be used as a negative electrode material for lithium-ion batteries, but they are prone to produce volume expansion during the cycle process, which leads to the disintegration of the electrode material structure and affects the battery performance. This paper reports the synthesis of high-performance electrode materials, Ni 3 S 2 /Co 9 S 8 /WSCC, a composite of Ni 3 S 2 /Co 9 S 8 nanocages, and wheat straw cellulose carbon (WSCC) by a simple hydrothermal method. This composite structure has the following advantages: (1) two metal sulfides, Ni 3 S 2 and Co 9 S 8 , are introduced simultaneously through the synthesis of nanocages, which can increase the defects and active sites at the interface. At the same time, the nanocage structure helps to buffer the volume change during ion insertion and detachment and promote ion diffusion. (2) The biomass carbon material as a substrate not only plays a supporting role, but also reduces the agglomeration of nanocages, making them have better dispersion. Using it as a lithium-ion battery anode, it has a specific capacity of 535.8 mAh g −1 after 300 cycles at 1 C.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2019
·Vol. 26
·期 9
·1-11
·
IF 1.53
Xiong Xiaopeng,Huo Peng,Xie Haitao
A free-standing Ni 3 S 2 @polypyrrole core-shell nanorod arrays have been successfully prepared and been directly used as supercapacitor. First, needle-like Ni 3 S 2 nanorods array was grown on Ni foam through a hydrothermal process, and was then electrochemically deposited with polypyrrole (PPy) layer. The composition, microstructure, and morphology of the obtained composite material have been studied by attenuated total reflection Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscope. Our results indicate that the needle-like Ni 3 S 2 nanorods with diameter about 200 nm and 3 μm in length have grown evenly on Ni foam, and the thickness of the coated PPy layer can be tuned by the electrodeposition time. The electrochemical properties of the obtained free-standing Ni 3 S 2 /Ni@PPy composite foam have been evaluated by a three-electrode system. Our results reveal that the composite foam with the PPy shell layer about 300 nm in thickness displays the best performance, and the area specific capacitance was measured to be over 5 times that of the Ni 3 S 2 /Ni foam to reach 55.4 mF/cm 2 . The improvement has been attributed to the unique hierarchical core-shell microstructure and to the proper amount of PPy deposition. Moreover, the electrochemical stability of the material has been checked to indicate its potential as high-performance supercapacitors.
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 Chemistry A
·
2015
·Vol. 3
·期 46
·23207-23212
·
IF 7.443
Ningyan Cheng,Qian Liu,Abdullah M. Asiri,Wei Xing,Xuping Sun
The efficiency of water splitting is mainly limited by the low rate of the oxygen evolution reaction (OER) and it is thus of great importance but still remains a huge challenge to develop efficient OER catalysts capable of delivering high current densities at low overpotentials. Herein, we describe our recent finding that a Fe-doped Ni3S2 particle film with 11.8% Fe-content hydrothermally grown on nickel foam (Fe11.8%-Ni3S2/NF) behaves as a highly active robust oxygen evolution electrode in strongly alkaline media. This electrode needs an overpotential of only 253 mV to achieve 100 mA cm−2 with a Tafel slope of 65.5 mV dec−1 and maintains its catalytic activity for at least 14 h in 1 M KOH, and the NiOOH and FeOOH formed at the Fe11.8%-Ni3S2 surface are the actual catalytic sites. Notably, it also operates efficiently and stably in 30 wt% KOH, capable of affording very high current densities of 500 and 1000 mA cm−2 at small overpotentials of 238 and 269 mV, respectively, with a faradaic efficiency of 100%.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Yali Yao,Jinmei He,Xuedan Zhu,Leihuan Mu,Jiehui Li,Kanshe Li,Mengnan Qu
Rationally designing cost-efficient, high-activity and durable electrocatalysts are used for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is sense to solve the energy crisis and conversion. Herein, the heterostructure superwetting Co–MoS 2 /Ni 3 S 2 -GO/NF electrode is successfully fabricated by a typical hydrothermal reaction and it's electrocatalytic performance is also systematically studied. Thanks to the establishment of Co doped MoS 2 /Ni 3 S 2 heterojunction , the improvement conductivity by the addition of graphene oxide (GO), and the superhydrophilicity and superaerophobicity of microstructure, the electrode shows excellent catalytic characteristics and only need an overpotential of 123 mV for OER and 161 mV for HER to reach 10 mA cm −2 and can work steadily for 15 h in alkaline solution. Remarkebly, the superwetting heterojunction electrode demonstrated excellent overall water decomposition ability when used as bifunctional electrocatalyst in 1.0 M KOH and only 1.47 V is required to achieve 10 mA cm −2 . Density functional theory (DFT) calculations show the constructed heterogeneous interface and Co doping are conducive to optimizing the chemisorption energy of hydrogen-containing intermediates. This work provides a new way of thinking that collaborative optimization of electrode structure and surface wettability regulation to increase the active area of reaction and accelerate the bubble release toward high-performance OER and HER electrodes .
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 ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Wensha Niu,Zuoyi Xiao,Zhenyu Zhao,Shangru Zhai,Na Liu,Chengrong Qin
In this academic research, we report a facile carbonization approach to fabricate Ni 3 S 2 nanoparticles immobilized on interconnected carbon nanosheets (denoted as Ni/Ni 3 S 2 @CNS) derived from sodium alginate . The prepared hybrids provide more redox sites and shorten ion diffusion path. On the one hand, the interconnected carbon nanosheets restrain the agglomeration and dissolution of nanoparticles under the high carbonization temperature. On the other hand, it effectively improves the electrical conductivity , thus maintaining its excellent electrochemical properties . Consequently, the Ni/Ni 3 S 2 @CNS-2-800 electrode fulfills perfect specific capacity, satisfactory charge-discharge rate, and splendid lifespan. Furthermore, an advanced asymmetrical device is assembled by employing Ni/Ni 3 S 2 @CNS-2-800 and activated carbon as the electrode materials, which delivers a high specific capacitance (229.30 F g −1 ) and exceptional energy density (81.42 W h kg −1 ).
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Xiang-Yu Wang,Meng Zhu,Qing-Nan Bian,Ben-Shuai Guo,Wei-Qing Kong,Chong-Bin Wang,Yuan-Yuan Feng
Hydrogen, carrying a high energy density and emitting zero greenhouse gases when in use, is particularly promising as an alternative for traditional fossil fuels. Electrochemical water splitting is an economical technology for producing sustainable and high-purity hydrogen gas. However, the intrinsically sluggish kinetics of the anode oxygen evolution reaction (OER) always decreases the efficiency of hydrogen production; the development of highly active and durable electrocatalysts with improved OER kinetics is thus desirable and crucial. Herein, Fe-based metal–organic framework (MOF)-Ni3S2 heterostructure nanocomposites are synthesized on a nickel foam (NF) substrate. The self-supporting Fe MOF-Ni3S2/NF catalyst shows excellent catalytic activities for OER. In alkaline media (1.0 M KOH), only 243 mV of overpotential is needed to reach the current density of 100 mA·cm–2. Even at the commercially viable high current densities of 500 and 1000 mA·cm–2, ultralow overpotentials of 283 and 309 mV are required, respectively. The catalytic activity of Fe MOF-Ni3S2/NF far exceeds that of the noble metal catalysts (e.g., RuO2) and most non-noble metal OER catalysts reported in the literature. In addition, the Fe MOF-Ni3S2/NF nanocomposite exhibits ultrahigh long-term stability at high current densities, with almost no activity attenuation in the chronopotentiometry test conducted at 100 mA·cm–2 and a negligible attenuation (23 mV) at 500 mA·cm–2 for 20 h. Our findings provide insights into designing and preparing cost-effective, highly active, and durable electrocatalysts for OER at high current densities.
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）