RARE METALS
·
2023
·Vol. 42
·期 8
·2643-2657
·
IF 8.8
Yuan Kai,Gao Teng-Jia,Yang Yang,Luo Wang,Li Shun,Zhang Chao-Yang,Xu Jian-Xiong,Li Na,Zhu Yi-Rong
Binary transition metal sulfides are hotly investigated in advanced energy storage devices because of their ultra-high reversible capacity. Nevertheless, the unsatisfied rate capability and cycling stability still hinder their practical application. Herein, hierarchical nanoporous carbon@NiCo 2 S 4 (HNCMs@NCS) composites with core–shell flower-like structures were prepared by in situ growing of NiCo 2 S 4 nanosheets on HNCMs through a hydrothermal-assisted template sacrificial method. Benefiting from a synergistic effect between the NiCo 2 S 4 shell with high specific capacity and the HNCMs with unique porous structure, the synthesized flower-like HNCMs@NCS composites exhibit extraordinary electrochemical performances, including a high capacity of 346.9 mAh·g −1 at 1 A·g −1 , superb rate property with 86.4% initial capacity at 30 A·g −1 and predominant cycle stability with 81.2% capacity retention after 5000 cycles. Furthermore, the resulting HNCMs@NCS cathode was coupled with the chemical-activated HNCMs (AHNCMs) anode to construct a hybrid supercapacitor device. The as-fabricated device exhibits superior energy density (49.9 Wh·kg −1 at 802 W·kg −1 ) and ultra-high power density (24 kW·kg −1 at 29.5 Wh·kg −1 ). This fascinating result further demonstrates the tremendous prospect of the synthesized HNCMs@NCS composites as high-performance supercapacitor electrode materials.
Graphical Abstract
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Xin Yu,Siran Xu,Xian Liu,Xiaohong Cheng,Yeshuang Du,Qi Wu
The development of self-supported nanosheet materials with porous multiple active sites has enormous potential for the application of oxygen evolution reaction (OER). Herein, we reported a three-dimensional (3D) porous nanosphere Mn-NiCo 2 S 4 /NF catalyst for OER. As a result, the simple Mn doping strategy results in good electrocatalytic performance and outstanding stability. During the OER, the Mn-NiCo 2 S 4 /NF only needs a small overpotential of 220 mV (40 mV lower than pure NiCo 2 S 4 /NF) to achieve the current density of 10 mA cm −2 , which is mainly due to a large number of exposed active sites and adequate pathways for mass diffusion and oxygen gas release. Moreover, Mn doping optimizes the electronic structure and thus facilitates electron transport , leading to superior electrocatalytic performance. The catalyst exhibits incredible corrosion resistance in 1 M KOH solution for 60 h or more. This work provides a valuable method to synthesize a low cost, high-efficiency, and corrosion resistant transition metal electrocatalyst for oxygen evolution using heteroatom doping strategy.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Xiaobing Xu,Xueming Liu,Wei Zhong,Lei Zhang,Guangxiang Liu,Youwei Du
Metal-organic frameworks (MOFs), serving as precursors or templated to construct nanomaterials , which have gained great attentions in the field of electrocatalysis . However, their applications still remain some challenges due to poor conductivity and easy agglomeration. In this work, the MOFs-derived NiCo 2 S 4 @NiCo 2 O 4 deposited on reduced Graphene Oxide (rGO) surface is designed by using a facile hydrothermal procedure. Attribute to the enlarged active surface area of the nanostructure and the strong synergistic effect between NiCo 2 S 4 and NiCo 2 O 4 , as well as the excellent conductivity of rGO. The NiCo 2 S 4 @NiCo 2 O 4 -rGO catalyst displays ultrahigh hydrogen evolution reaction (HER) property and excellent stability, only need an overpotential of η 10 = 95 mV to attain 10 mA cm −2 and deliver a small Tafel slope of b = 52 mV dec −1 in 1 M KOH. This work can provide a window to construct and develop new noble metal-free HER catalysts base on Ni-MOFs served as precursors.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Ziqian Ma,Zhiqin Sun,He Jiang,Fuzhi Li,Qian Wang,Fengyu Qu
The intertwined fiber structure is advantageous as a structure of supercapacitor electrode material. In this paper, the NiCo 2 S 4 embedded in carbon fiber (NiCo 2 S 4 /CF) has been prepared through hydrothermal vulcanization of electrospun NiCo 2 O 4 /carbon nanofibers precursor. It is a simple way to integrate the pseudocapacitive material with carbon, rendering high capacitance (1169 F g −1 at 1 A g −1 ), excellent rate capability (81.3% at 20 A g −1 ) and superior cycle stability (87.2% capacitance retention after 10,000 cycles). Afterwards, an all-solid-state asymmetric supercapacitor device (ASC) has been prepared with the NiCo 2 S 4 /CF positive electrode and porous carbon nanofiber negative electrode. When the power density of ASC is 878.3 W kg −1 , the energy density can reach 28.8 Wh kg −1 with excellent cycle stability.
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ACS Applied Energy Materials
·
2019
·
IF 0
Yongkun Liu,Guohua Jiang,Zheng Huang,Qiuling Lu,Bo Yu,Uwamahoro Evariste,Pianpian Ma
In this paper, seasame-ball-like core–shell hollow mesoporous carbon spheres decorated by NiCo2S4 nanoparticles (NiCo2S4/HMCSs) were prepared via a hydrothermal method. The obtained NiCo2S4/HMCSs could be used as the positive electrodes for asymmetric supercapacitors (ASCs), combining the outstanding electroconductivity of carbonic materials and high capacity of NiCo2S4 nanoparticles. The morphology and structure properties of the obtained NiCo2S4/HMCSs were characterized. The electrochemical properties of the as-obtained composites were characterized by an electrochemical workstation, showing an outstanding capacity of 1098.5 F g–1. Finally, ASCs were further fabricated by using the NiCo2S4/HMCSs as the cathode and hollow mesoporous carbon spheres (HMCSs) as the anode. Moreover, the assembled ASCs exhibited a good energy density of 35.1 Wh kg–1 at a moderate power density of about 203.5 W kg–1 and good cycle ability of ∼90% even after 3000 cycles.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Qiaohui Guo,Tingting Wu,Lijuan Liu,Yi He,Dong Liu,Tianyan You
Nickel cobalt sulfide (NiCo 2 S 4 ) nanomaterials has attracted much attention in various fields due to its highly catalytic property and low cost. Herein, NiCo 2 S 4 nanowire arrays grown on electrospun graphitic nanofiber film (NiCo 2 S 4 /EGF) is prepared for nonenzymatic glucose sensor. A three-dimensional, self-supporting and porous NiCo 2 S 4 /EGF is synthesized through a two-step hydrothermal process. By rationally controlling the growth kinetics, NiCo 2 S 4 arrays exhibit a unique core-shell structure with rough surface, providing abundant electrochemically active sites exposed to the electrolyte. When applied to glucose determination, NiCo 2 S 4 /EGF modified electrode displays a wide linear range (0.0005–3.571 mM, R 2 = 0.995) and low detection limit (0.167 μM, S/N = 3). The excellent sensing properties of NiCo 2 S 4 /EGF may be attributed to the high electrocatalytic activity of NiCo 2 S 4 and the good electrical conductivity of EGF frameworks. In addition, the as-proposed sensor also displays other outstanding advantages, including simple preparation, low cost, perfect reproducibility and good selectivity. The results suggest that NiCo 2 S 4 /EGF may show great promising in practical applications for glucose detection.
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Advanced Sustainable Systems
·
2019
·Vol. 3
·期 5
·1800167
·
IF 0
Muhammad Sohail Riaz,Xiaotao Yuan,Yantao Zhao,Chenlong Dong,Shuying Nong,Zeeshan Ali,Fuqiang Huang
Innovative nano/microarchitectures, owing to their promising catalytic features, such as abundant active sites, high surface area, and enhanced ion transport, are ideal for oxygen electrocatalysis. Herein, an inventive approach is put forward to fabricate ternary metal sulfide hollow microcubes by a hydrothermal method between spherical porous ZnO with transition metal cations in the presence of urea followed by etching and sulfurization. The significant electrocatalytic activity toward oxygen evolution reaction (OER) with onset potential of 1.48 V (vs reversible hydrogen electrode (RHE)) is obsereved. The objective material shows an overpotential of 320 mV, to achieve a current density of 10 mA cm −2 for OER and excellent robustness with slight variation in potential after long-term chronopotentiometry test for 12 h. As expected, the material also exhibits oxygen reduction reaction (ORR) activity with a half wave potential of 0.8 V (vs RHE) and limited current density of 5.1 mA cm −2 . Meanwhile, further investigations confirm the near four-electron transport pathways for ORR. Such up-bottom etching followed by sulfurization method provide a new concept for engineering porous electrocatalysts.
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Catalysis Science & Technology
·
2019
·Vol. 10
·期 4
·1056-1065
·
IF 5.726
Xiaoliang Guo,Zhiming Liu,Fang Liu,Jun Zhang,Lekai Zheng,Yongchuan Hu,Jing Mao,Hui Liu,Yanming Xue,Chengchun Tang
The development of efficient, stable and inexpensive electrochemical water-splitting catalysts for the hydrogen evolution reaction (HER) over a wide range of pH is of great importance for the production of hydrogen resource. Defect engineering with electronic structure modulation has been expected to be an effective strategy to enhance the electrocatalytic activity. Herein, Ni–Co bimetallic sulfide (NiCo2S4) nanosheet arrays with controlled sulfur vacancies have been developed by multiple vulcanization treatment of the Ni–Co hydroxide precursor for HER catalysis at all pH values. The presence of S vacancies has been identified by various characterization means, and their effects on the HER performance are well investigated. The obtained NiCo2S4 nanosheet arrays with optimal sulfur vacancy content exhibit the best HER performance in alkaline medium, only requiring an overpotential of 150 mA at −10 mA cm−2 with a Tafel slope of 82.5 mV dec−1, as well as excellent durability. Experimental results confirm that the high HER activity could be ascribed to the accelerated electron transfer and good intrinsic activity for the electrocatalyst with optimal S vacancies. These findings should provide a new vacancy modulation for traditional transition metal chalcogenides for the purpose of boosting the HER performance at all pH values.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Songyuan Wu,Jiaheng Wang,Linheng Zhao,Yulong Cao,Haoxiang Yang,Xiao Jing,Jiarui Li,Yang Zhao,Jiaxu Gong,Yatang Dai
The quest to achieve high energy density and superior stability in supercapacitors is both attractive and challenging. This work reports a simple method to grow CoTe/NiCo 2 S 4 composite electrode materials with core-shell structure. When used as a cathode material, the unique core-shell structure exhibits outstanding electrochemical characteristics, including a superior specific capacitance (1470.45 F g −1 at 1 A g −1 ), outstanding cycling stability (86.69 % after 5000 cycles), and impressive rate performance (77.17 % at 10 A g −1 ). Notably, the asymmetric hybrid supercapacitor constructed using CoTe/NiCo 2 S 4 as the cathode and AC/NF as the anode can provide an operating voltage of 1.8 V, achieving a peak energy density of 39.8 Wh kg −1 and a highest power density of 832 W kg −1 . Moreover, the supercapacitor demonstrates satisfactory rate performance (81.25 % at 10 A g −1 ) and excellent cycling stability (86.61 % after 8000 cycles). Furthermore, when assembled into a quasi-solid-state flexible supercapacitor, the device can support a small toy fan to run for 66 seconds, thereby highlighting its viability for practical energy storage applications.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xingyue Wu,Yiping Qiu,Wenrong Cai,Junyao Li,Datong Wu,Laidi Xu,Yong Kong
Melamine foam (MF) supported NiCo 2 S 4 /Ag nanowires (AgNWs) were facilely prepared and used as the compressible electrode for the asymmetric supercapacitor (ASC). AgNWs and NiCo 2 S 4 were successively decorated on the surface of MF by a two-step impregnation approach, and the resultant NiCo 2 S 4 /AgNWs/MF exhibited a high deformation-tolerance and outstanding electrochemical behaviors due to the flexible skeleton of MF, high electrical conductivity of AgNWs and high specific capacitance of NiCo 2 S 4 . More importantly, the nanosized NiCo 2 S 4 could be effectively activated by charging/discharging as the NiCo 2 S 4 nanoparticles were gradually converted into NiOOH and CoOOH nanosheets during the repeated charging/discharging cycles, resulting in significantly high capacitance retention (155 % after 2000 charging/discharging cycles). Finally, an ASC was fabricated by using NiCo 2 S 4 /AgNWs/MF as the cathode and MF supported Ti 3 C 2 T x /AgNWs (Ti 3 C 2 T x /AgNWs/MF) as the anode, which showed a high energy density of 28.8 mWh cm −3 at the power density of 754 mW cm −3 .
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DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 42
·15162-15169
·
IF 4.39
Dandan Chu,Li Yan,Qiwen Chen,Xue-Qiang Chu,Danhua Ge,Xiaojun Chen
Hollow prism-like NiCo2S4 materials (NiCo2S4 HNPs) were successfully fabricated by a two-step method. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and powder X-ray diffraction (XRD) confirmed the morphology and structure of the as-prepared NiCo2S4 nanoprisms. A non-enzymatic sensor based on NiCo2S4 HNPs was constructed with outstanding electrochemical activity towards glucose oxidation in alkaline medium. The sensor showed a rapid response time (∼0.1 s), a high sensitivity of 82.9 μA mM−1 cm−2, a wide linear range (0.005–20.2 mM) and a detection limit of 0.8 μM (S/N = 3) with a good selectivity and reproducibility. Additionally, the proposed electrode also confirmed the feasibility in practical blood serum. These results indicate that NiCo2S4/ITO has great potential in the development of non-enzymatic glucose sensor applications.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hanhan Lv,Daniel K. Macharia,Lisha Zhang,Nuo Yu,Yi Zhang,Yumei Zhang,Zhigang Chen,Seeram Ramakrishna
The development of efficient photocatalysts for solar-driven hydrogen production is crucial for addressing energy and environmental challenges. Herein, a full-spectrum responsive “dual-engine” photocatalytic system based on a multifunctional cocatalyst featuring electrons extraction, photothermal heating effect and abundant active sites was successfully designed. In this system, hierarchical NiCo 2 S 4 (NCS)/defective ZnCdS (ZCS-Vs) composite photocatalysts were synthesized through a simple physical mixing method with hierarchical NCS modified ZCS-Vs nanoparticles. Owing to the introduction of black hierarchical NCS, these composite photocatalysts show a wide light absorption range from 300 to 1200 nm due to the introduction of black hierarchical NCS. Under broad-spectrum illumination, the optimized photocatalyst delivered a maximum H 2 production rate of 22.19 mmol·g −1 ·h −1 and an apparent quantum yield of 6.29 % at 420 nm, corresponding to roughly a 42-fold improvement over pure ZCS-Vs. This outstanding H 2 evolution performance originates from three key factors. First, the metallic nature and high work function of NCS enable the formation of a Schottky junction with ZCS-Vs, which efficiently extracts photogenerated electrons from ZCS-Vs for the reduction of H + ions. Second, under photoexcitation, NCS exhibits a strong localized surface plasmon resonance (LSPR) effect, leading to a rapid increase in local temperature on the catalyst surface. This localized heating further elevates the overall reaction solution temperature, thereby reducing the energy barrier for photocatalytic H 2 evolution. Third, 3D hierarchical structure of NCS not only inhibits nanoparticle aggregation and provides abundant active sites, but also enhances light harvesting through internal scattering, thereby maximizing both charge separation and photothermal efficiency. Consequently, this “dual-engine” photocatalytic system provides a feasible pathway for designing photothermal-assisted composite photocatalysts to enhance photocatalytic H 2 evolution efficiency.
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