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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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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高影响因子
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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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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高影响因子
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
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Hui Nan,Jianhua Han,Qiang Luo,Xuewen Yin,Yu Zhou,Zhibo Yao,Xiaochong Zhao,Xin Li,Hong Lin
Exploiting efficient Pt-free counter-electrode materials with low cost and highly catalytic property is a hot topic in the field of Dye-sensitized solar cells (DSCs). Here, NiCo 2 S 4 /reduced graphene oxide (RGO) was prepared via an economical synthesis route, and the as-prepared composite exhibited comparable electrocatalytic property with the conventional Pt electrode as the counter-electrode. Notably, the introduction of RGO into the NiCo 2 S 4 counter-electrode induces a significantly promoted electrocatalytic rate towards the triiodide reduction than that of pristine NiCo 2 S 4 by increasing surface area in the composite electrode, as revealed by electrochemical impedance spectroscopic measurement and Tafel polarization measurement. The easy synthesis, low cost and excellent electrochemical performance of the NiCo 2 S 4 /RGO composites enable themselves to serve as promising counter-electrode candidates for efficient DSCs.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Xiaoxue Mao,Longzhen Wang,Zhiyong Xiong,Yuhao Xiang,Jiaxi Xu,Sirui Wan,Maowen Xu,Qianru Ma
The shuttle effect, volume expansion, and slow conversion kinetics of sodium polysulfides (NaPSs) are significant challenges for room-temperature sodium‑sulfur batteries (RT Na S). To address these issues, this work designs a carbon-coated sulfur carrier (NiCo 2 S 4 ) with a unique hollow network structure. The unique structure provides ample space for sulfur's volume expansion, while the carbon material's excellent conductivity facilitates electron transport. Furthermore, the S@NiCo 2 S 4 /C composite cathode features a bimetallic sulfide framework that simultaneously provides strong anchoring and catalytic conversion functionality for polysulfides. Remarkably, the S@NiCo 2 S 4 /C cathode material maintains a capacity of 416.3 mA h g −1 after 400 cycles at 0.5C rate, with a cycle-dependent decay rate of merely 0.1%, demonstrating its excellent cycling stability and application potential. This study provides novel design concepts for cathode materials, which are essential for advancements in RT Na S batteries. This work designed and synthesized a carbon-coated NiCo₂S₄ hollow nanotube framework as a highly efficient sulfur host. During cycling, the polar NiCo 2 S 4 component not only chemically anchors sodium polysulfides to suppress dissolution but also acts as a catalyst to accelerate their redox conversion, thereby enhancing sulfur electroactivity. Therefore, the assembled cathode exhibits excellent cycling stability and rate performance in RT Na S batteries. Download: Download high-res image (159KB) Download: Download full-size image
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高影响因子
IONICS
·
2026
·
IF 3.4
LiangLiang Wang
In this study, a NiCo 2 S 4 @Nd 2 O 3 core–shell structured positive electrode was constructed via a two-step strategy. First, NiCo 2 S 4 nanorod cores were synthesized through a hydrothermal–sulfidation process, followed by the in situ coating of Nd 2 O 3 nanosheet shells using a sol–gel method. The CNT negative electrode was fabricated by loading carbon nanotubes onto a carbon paper substrate via vacuum filtration. Multiscale characterizations confirm the formation of a tightly integrated heterogeneous interface between the NiCo 2 S 4 nanorod core and the Nd 2 O 3 nanosheet shell, which effectively mitigates the volume expansion of NiCo 2 S 4 and accelerates charge transport. Electrochemical measurements reveal that the NiCo 2 S 4 @Nd 2 O 3 core–shell electrode delivers a high specific capacitance of 2351 F g − 1 at 1 A g − 1 , with a capacitance retention of 77.4% at 20 A g − 1 , significantly outperforming pristine NiCo 2 S 4 or Nd 2 O 3 electrodes. An asymmetric supercapacitor assembled using the NiCo 2 S 4 @Nd 2 O 3 positive electrode and the CNT negative electrode exhibits outstanding overall performance within a wide voltage window of 0–1.6 V. It achieves a specific capacitance of 242 F g − 1 at 1 A g − 1 and retains approximately 93% of its initial capacitance after 6000 charge–discharge cycles. Moreover, the device delivers an energy density of 86.4 Wh kg − 1 at a power density of 800 W kg − 1 , and still maintains 62.4 Wh kg − 1 when the power density increases to 12 000 W kg − 1 . The core–shell structural design strategy proposed in this work provides an effective pathway for the development of high-performance supercapacitors and holds significant promise for applications in flexible energy storage systems.
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高影响因子
Journal of Energy Storage
·
2026
·
IF 10.7
Shang Wu,Qiyue Tong,Huize Zhang,Zhenyang Yu,Chenxu Zhu,Qiong Su,Hong Zhang,Guihua Li,Xiaojun Yang,Juzhen Kang,Quanlu Yang
NH 2 -UIO-66 has been regarded as a promising porous material owing to its high specific surface area and structural stability, although its limited conductivity restricts its application in supercapacitors. In this work, a NiCo 2 S 4 /NH 2 -UIO-66 nanoflower composite (NCS/NU) was synthesized via a vulcanization process with thioacetamide. Electrochemical measurements conducted in a three-electrode system revealed that the composite delivered a specific capacitance of 172.4 mAh g −1 at 1 A g −1 and maintained 82.1% of its initial capacitance after 5000 cycles at 5 A g −1 . Morphological characterization indicated that the nanoflower architecture was largely preserved after sulfurization. The in-situ formed NiCo 2 S 4 contributed to enhanced pseudocapacitance and induced surface wrinkling of the petals, which helped stabilize the composite structure supported by NH 2 -UIO-66. For the anode, S and N co-doped three-dimensional porous carbon (SNC) was prepared via a sol-gel method followed by stepwise high-temperature carbonization using ammonium persulfate as the activator. A hybrid supercapacitor was subsequently assembled with the NCS/NU as the positive electrode and SNC-700 as the negative electrode. The device delivered an energy density of 28.8 Wh kg −1 and retained 74.1% of its initial capacitance after 5000 charge-discharge cycles.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Shanwu Yu,Rui Liu,Ruiqi Ma,Qitao Zhou,Yifan Dong,Xiaoding Lou,Jing Pan,Fan Xia
The hydrogen evolution reaction (HER) happens at the interface between the electrolyte and the electrocatalysts . Thus, the outer surface of electrocatalysts is regarded as the most important towards the catalytic performance, considering its direct contact with the electrolyte. However, the interior part of catalysts could also have an influence on the HER performances. Herein, the HER catalytic performances of MoS 2 nanosheets are proven to be enhanced by the interior NiCo 2 S 4 nanotube skeletons, although the interior skeletons are unaccessible for the electrolyte during the HER process. The reasons may lie in the optimized electronic transport properties and much increased amount as well as intrinsic activity of active sites. The theoretical calculations and experimental results suggest enhanced adsorption of H* and accelerated Heyrovsky step of the HER process for the NiCo 2 S 4 supported MoS 2 , which may be the reason of the improved intrinsic activity of the active sites. Moreover, calculation of the densities of states suggests the metallic nature of the heterostructures , which could result in the excellent electronic transport performance for NiCo 2 S 4 supported MoS 2 . In addition, the enhancement has a close relationship with the amount of the loading MoS 2 . Besides, compared with bared NiCo 2 S 4 nanotubes, the MoS 2 loaded NiCo 2 S 4 nanostructures also exhibit better HER catalytic activity as well as improved catalytic stability. This work offers an effective and facile way to design and prepare efficient non-precious metal HER catalysts.
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高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Shemsu Ligani Fereja,Ping Li,Ziwei Zhang,Jinhan Guo,Zhongying Fang,Zongjun Li,Wei Chen
Electrocatalytic water splitting is a promising process as it can effectively convert renewable electricity to chemical energy such as hydrogen gas. However, the energy conversion efficiency of water splitting process is fundamentally dependent on the catalytic activity of selected electrocatalyst . In particular, one of the main reasons that hinder the practical application of water splitting system is the sluggish kinetics of oxygen evolution reaction (OER). Hence, earth-abundant elements-based catalysts with excellent OER catalytic performance is significantly important. Herein, MOF-derived NiCo 2 S 4 /Fe 2 O 3 hybrid nanostructure grown on carbon cloth (NiCo 2 S 4 /Fe 2 O 3 @CC) was successfully fabricated as OER catalyst. Benefiting from the merits of unique architecture with hybrid heterostructure grown on carbon cloth, high porosity and abundant active sites , the designed NiCo 2 S 4 /Fe 2 O 3 @CC demonstrated superior electrocatalytic performance toward the OER. The fabricated NiCo 2 S 4 /Fe 2 O 3 @CC catalyst exhibited very low overpotential of 190 mV to achieve a current density of 10 mA cm −2 and a small Tafel slope of 45 mV dec −1 . Furthermore, the as-fabricated catalyst demostrated remarkable stability. The present work provides an effective method to fabricate novel metal sulfide and metal oxide hybrids for OER catalysis.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Zeqi Shi,Xuetao Shen,Zhe Zhang,Xi Wang,Ning Gao,Zhanwei Xu,Xueying Chen,Xinyue Liu
Hollow structures draw much attention for high energy density supercapacitors due to their large hollow cavities, high specific surface area, and low interfacial contact resistance. However, constructing hierarchical hollow structures remains a challenge. Herein, we reported a facile template-free method for a novel urchin-like hollow nickel cobalt sulfide (NiCo 2 S 4 ). The hollow interior and urchin exterior remarkably improved the specific capacitance and accommodated structural collapse caused by electrochemical reactions. Owing to these features, the urchin-like hollow NiCo 2 S 4 spheres exhibited an impressive capacitance of 1398F g −1 at 1 A g −1 and maintained 1110F g −1 with a large current density of 10 A g −1 . The hybrid supercapacitor fabricated by NiCo 2 S 4 and active carbon possesses an energy density of 39.3 Wh kg −1 at a power density of 749.6 W kg −1 and an outstanding cycling stability of 74.4% retention after 5000 cycles. Our work presents a facile method of constructing a hollow structure of binary sulfide materials and also makes progress on highly efficient supercapacitors.
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高影响因子
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