ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Ran Zhang,Jing Cao,Ting Peng,KeXuan Wu,Yinqiang Shu
Dimensional stability anodes (DSA), constructed using noble metal oxides like RuO 2 and IrO 2 , is widely used in industrial chlorine production. The DSA electrode demonstrates exceptional chlorine evolution capabilities in acidic solutions and high-chloride concentrations. However, under neutral conditions, its chlorine evolution efficiency diminishes significantly. In this paper, a low-cost, high-efficiency 3D flower-like NiCo 2 O 4 catalyst was fabricated that exhibits high catalytic activity in neutral sodium chloride solutions. The 3D flower-like NiCo 2 O 4 catalyst exhibits good chlorine evolution efficiency, achieving 90 % at 30 mA/cm 2 in NaCl solutions. Furthermore, it's chlorine evolution efficiency of the electrocatalyst surpasses that of commercial DSA electrode at various current densities, making it a highly promising candidate for electrocatalytic applications.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2024
·
IF 15.7
Yan Duan,Mifeng Xue,Bin Liu,Man Zhang,Yuchen Wang,Baojun Wang,Riguang Zhang,Kai Yan
Electrocatalytic refinery of low-value biomass-based glycerol into value-added chemicals formic acid (FA) is an attractive alternative to traditional thermochemical refineries. However, constructing non-precious catalysts with abundant active hydroxyl (OH*) is the main obstacle to the electrocatalytic glycerol oxidation reaction (EGOR). Herein, we combine density functional theory (DFT) and experiments to investigate EGOR over the finely constructed NiCo 2 O 4 nanosheets. DFT results firstly indicate that the NiCo 2 O 4 nanosheets exhibit the highly hydroxylated (311)-OH* surface with the lowest Gibbs free energy, which significantly improves the electrochemical reaction kinetics and can achieve desirable FA yield by adjusting the adsorption energy of the adsorption intermediate. Following the theoretical prediction, ultrathin NiCo 2 O 4 nanosheets (~1.70 nm) are fabricated by a facile electrodeposition method with sufficient OH* on the surface. The charge-transfer resistance of NiCo 2 O 4 nanosheets in EGOR is only 0.94 Ω and the anode power consumption can be reduced by up to 320 mV at 10 mA cm −2 , keeping the high glycerol conversion (89%) and FA selectivity (70%) during the 120-h stability test. DFT calculations and experimental tools (e.g., multi-potential step experiments, operational electrochemical impedance spectroscopy) confirm that OH* in-situ generated on the thin nanosheets structure is essential in facilitating charge transfer between catalysts and adsorbed molecules to enhance C–C bond cleavage. This work offers a guideline for the rational design of robust catalysts for the selective upgrading of biomass-derived chemicals.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Shuang Wang,Shupeng Zhang,Maoxiang Liu,Haiou Song,Juanjuan Gao,Yueyue Qian
A novel MoS 2 -NiCo 2 O 4 architecture with highly sensitive determination toward glucose is constructed successfully in this work. MoS 2 nanosheets are regarded as clever connectors to connect NiCo 2 O 4 nanoplates together, which would inspire the electrocatlytic performance of NiCo 2 O 4 nanoplates acted as active sites greatly. The interesting nanostructure and composition were confirmed by scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy, etc. Rational incorporation of MoS 2 as an electron collector can promote the formation of conductive chains among the NiCo 2 O 4 nanoplates, accompanying with inhibiting of NiCo 2 O 4 aggregation. The conductive path can accelerate the charge transfer significantly. The MoS 2 -NiCo 2 O 4 modified GCE exhibits enhanced electrocatalytic activity toward the oxidation of glucose, compared with NiCo 2 O 4 nanoplates. At a potential of +0.418 V, the fabricated biosensor demonstrates a wide detection range with high sensitivity (1748.58 μAmM −1 cm −2 ) and a low detection limit of 0.152 μM. It also shows anti-interference for ascorbic acid, uric acid, dopamine and chloride ion. Besides, it owns good reproducibility, repeatability and long-term stability. Excellent catalytic oxidation performance for glucose supports that MoS 2 -NiCo 2 O 4 hybrid is an outstanding and promising electrode material toward glucose biosensor.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Tao Cong,Xiaoyu Wang,Xifeng Ding
Metal–air batteries, with high energy density and eco-friendliness, are crucial for sustainable energy. Although abundant and low-cost, spinel oxides, ideal for metal–air batteries, suffer from low conductivity, hindering electron transport and slowing electrocatalytic kinetics. In this work, NiCo2O4 (NCO) was embedded on carbon nanotubes (CNTs) via a hydrothermal method to form a composite catalyst (NCO-1CNTs), and subsequent annealing in nitrogen enhanced oxygen vacancy concentration in the spinel structure. In 0.1 M KOH, NCO-1CNTs achieves outstanding oxygen evolution reaction (OER) performance (η10 = 427 mV) and oxygen reduction reaction (ORR) performance (jL = 5.1 mA cm–2), surpassing NCO by 16.6% and 82.1%. The enhanced catalytic activity is attributed to the high conductivity of carbon nanotubes, which accelerates electron transfer. Additionally, carbon nanotubes prevent spinel oxide aggregation, increase active sites, and form a porous structure, enhancing oxygen species transport. Moreover, annealing NCO-1CNTs in a nitrogen atmosphere induces the spinel component to generate more oxygen vacancies, boosting catalytic performance. The resulting zinc–air battery delivers a power density of 68 mW cm–2 and exhibits stable performance over 100 h of charge–discharge cycling. This study delivers a low-cost, high-activity, stable bifunctional cathode catalyst, signaling great promise for commercial rechargeable zinc–air batteries.
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 9
·1-14
·
IF 2.4
Jiang Wenjia,Zhang Pingzhu,Jia Qingqing,Zhang Zhongao,Liu Yaming,Hu Shilin,Ruan Hao,Huang Li,Wu Dong,Zhao Zhi
Hydrophobic catalysts are essential for water-hydrogen exchange reactions to facilitate the separation of hydrogen isotopes. However, existing hydrophobic catalysts are primarily small-sized pelleted forms, which are not suitable for large-scale systems. In contrast, structured catalysts, which offer a low pressure drop and enhanced mass and heat transfer properties, present promising applications. In this work, cake-like nickel foam (NF) was selected as the structural support. Activated carbon was initially loaded onto the NF using silica sol, followed by hydrothermal deposition of NiCo 2 O 4 with a rough morphology, resulting in a carrier with high roughness and a large specific surface area. The carrier attained a superhydrophobic state after modification with heptadecafluorodecyltrimethoxysilane (FD-TMS), achieving a contact angle of 163.8°. The Pt/NiCo 2 O 4 /C/NF superhydrophobic catalyst was subsequently prepared by loading Pt particles via an impregnation-gas phase reduction method. This method exposes the active metal on the surface, enhancing the Pt utilization rate. Furthermore, the extensive surface area of the carrier provided numerous attachment sites for Pt, leading to smaller particle sizes and greater exposure of Pt precursors for reduction to zero-valent Pt. The results indicated that the Pt particle size in the catalyst was 2.31 nm, with 73% of the Pt in the zero-valent form. In water-hydrogen exchange reactions, the total volume mass transfer coefficient Kya for the Pt/NiCo 2 O 4 /C/NF superhydrophobic catalyst reached 17.35 × 10 –2 s –1 , indicating strong catalytic performance. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Haixing Gao,Yang Cao,Yong Chen,Xiaoyong Lai,Shujiang Ding,Jinchun Tu,Junlei Qi
The performance of direct methanol fuel cells hinges on the activity of the catalyst. To enhance the electro-catalytic activity, a flower-like nanostructure assembled from thin Au/NiCo 2 O 4 nanosheet is synthesized via a microwave process combined with deposition-reduction method, where the Au nanoparticles are well dispersed on the surface of the NiCo 2 O 4 nanosheet . The Au/NiCo 2 O 4 composite nanoflower is successfully applied in the electro-catalytic oxidation of methanol and its electro-catalytic performance is investigated by cyclic voltammetry , chronoamperometry and electrochemical impedance spectroscopy , which exhibits excellent electro-catalytic qualities towards methanol electro-oxidation in alkaline medium, including low onset potential (0.31 V), high current densities (135.9 mA cm −2 ) at 0.60 V (vs. SCE), and desirable electro-oxidation stability (94%) after 500 cycles. The activity of NiCo 2 O 4 is significantly enhanced by a small amount of Au for methanol electro-oxidation. Au, a highly electronegative metal, acted as an electron adsorbate, stimulates the generation and stabilization of Co 4+ and Ni 3+ cations as the active centers for methanol oxidation reactions.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
You Zhou,Zhengyong Huang,Huijun Liao,Jian Li,Hanxiang Wang,Yu Wang
Graphene, as a family of 2D materials , can be used as film electrodes in energy storage devices because of its high surface area, electrical conductivity , and environmental stability. However, the pure graphene electrode attains aggregating nature, which significantly limits its practical application. To solve the overstacking problems, we construct a 3D porous reduced graphene (rGN) film by a novel and green Cu 2 O template-assisted route based on “coordinating etching and precipitating” process. Noticeably, a brand new material-NiCo 2 O 4 is generated when the template is removed by optimizing the coordinating etchant and the reaction conditions. It is observed that NiCo 2 O 4 perfectly imitates the shape of Cu 2 O template and has a hollow hydrangea-like structure. Furthermore, these emerging hollow NiCo 2 O 4 hydrangeas not only prevent the re-accumulation of sheet layers, but also afford 3D porous structure for film, and greatly enhance the energy storage properties on account of the pseudocapacitance of NiCo 2 O 4 . The 3D graphene/NiCo 2 O 4 film (3D rGN/NiCo 2 O 4 ) exhibits high specific capacity of 708.36 F g −1 at 1 A g −1 , remarkable rate performance of 582.11 F g −1 even at 16 A g −1 , and superior circulation ability with 94.3% capacitance retention after 6000 cycles at 10 A g −1 , indicating the potential applications in energy storage.
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Xianyong Feng,Lei Yue,Hui Kang,Hongmei Li,Junshan Li,Jie Deng,Huijuan Guan,Luming Li
Transition metal oxide of NiCo 2 O 4 as nanozyme for non-enzymatic electrochemical sensing of nitrite still needs to be explored for large scale application. In this work, a simple morphology engineering strategy of NiCo 2 O 4 has been developed for high-effciency detection of nitrite. In comparison to pristine NiCo 2 O 4 , the enhanced electrochemical sensing efficiency towards nitrite for morphology-optimized NiCo 2 O 4 were obtained. The highest enzyme-like electrocatalytic activity of NiCo 2 O 4 –0.6 was achieved by introducing 0.6 mmol CTAC in the preparation process. The constructed electrochemical sensor showed superior nitrite analytical performances of low detection limit (0.427 μM), high sensitivity (1.179 μA·μM −1 ·cm −2 and 0.073 μA·μM −1 ·cm −2 ) and wide linear response ranges (0.711–22 μM and 22–16,217 μM). In addition, the sensor was possessed of high selectivity, anti-interference, excellent reproducibility and stability. The plausible mechanism of NO 2 − oxidation into NO 3 − in the presence of NiCo 2 O 4 was proposed. More interestingly, the as-fabricated sensor displayed satisfactory recoveries (100.02%–103.21%) and relative standard deviation (RSD < 2.2%) for the detection of nitrite in real samples. Our work makes the practical application of NiCo 2 O 4 in electrochemical detection of nitrite possible and may open up a promising pathway for improving the electrochemical sensing performances of bimetallic oxide.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Yinze Yang,Yan Du,Wen Yang,Yueru Yan,Yipeng Wang,Rujin Zhang,Huishan Shang,Lili Zhang,Yafei Zhao,Bing Zhang
Reasonable design core@shell heterostructures is essential for efficient photocatalytic reduction of Cr(VI) in water, as such architectures not only enhance light absorption but also facilitate light-induced charge separation and transfer. Herein, ZnIn 2 S 4 (ZIS) nanosheets were grown in situ on NiCo 2 O 4 hollow nanospheres to construct a NiCo 2 O 4 @ZIS heterostructured photocatalyst for efficient Cr(VI) reduction. The optimal 6 wt% NiCo 2 O 4 @ZIS achieves 100 % photocatalytic reduction efficiency for Cr(VI) within 10 min at pH 3, along with excellent cycling stability, outperforming pure ZIS and most previously reported ZIS-based catalysts. The improved photocatalytic activity is attributed to the unique heterostructure and composition of NiCo 2 O 4 @ZIS, where intimate interfacial contact facilitates charge separation and transfer while suppressing charge recombination. Additionally, homogeneous arrangement of ZIS nanosheets over NiCo 2 O 4 raises the quantity of active sites and enhances light harvesting. This study presents a viable strategy for constructing core@shell heterostructured photocatalysts based on ZIS toward highly efficient Cr(VI) reduction.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Wenlong Zhang,Rong Zhong,Jiake Li,Hedong Jiang,Xin Liu,Pingchun Guo,Xueguo Zhao,Yanxiang Wang
For NiCo 2 O 4 supercapacitor electrode materials, simultaneously improving energy density and long-term cycling performance remains a challenge. This is because the lower conductivity and the lattice distortion induced during cycling restrict the utilization of active sites and cycling stability. In this work, a binder-free Bi-doped NiCo 2 O 4 urchin-like electrode was grown in situ on nickel foam by a hydrothermal method followed by heat treatment, and the regulatory effect of Bi incorporation on the structure and electrochemical behavior of the NiCo 2 O 4 urchin-like electrode was investigated. Appropriate Bi doping can reconstruct the local coordination environment, thereby inducing the formation of oxygen vacancies and increasing the specific surface area and electrochemical performance, thus accelerating ion/electron transport and improving the reversibility of the Faradaic reaction. Results show that the 5% Bi-NiCo 2 O 4 electrode exhibits optimal electrochemical performance, with a specific capacitance of 2866.6 F g −1 at 0.5 A g −1 , and the ionic conductivity increases by 34.8% compared to the undoped sample. Furthermore, an asymmetric supercapacitor device (Bi-NCO//C800) was assembled using Bi-NiCo 2 O 4 as the positive electrode and polymer-derived porous carbon (C800) as the negative electrode. The device demonstrates an outstanding specific capacitance of 154.7 F g −1 at 0.5 A g −1 , achieves a maximum energy density of 48.4 Wh kg −1 and a maximum power density of 7500 W kg −1 , and maintains 115% capacitance retention over 11,000 cycles, exhibiting excellent cycling stability. Download: Download high-res image (130KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121777
·
IF 7.5
Yuangao Li,Shan Chen,Rengfeng Luo,Liyan Xue,Heng Chen,Fengzhi Tan,Minzhong Huang,Zhaoli Liu,Fan Yang
Solar-driven interfacial evaporation presents a promising solution to the global water crisis. However, there are challenges in developing low-cost multi-functional evaporators using existing materials. Herein, we developed a double-layer evaporator consisting of a NiCo 2 O 4 nanofibers/chitosan composite aerogel (top layer) and a polyurethane (PU) sponge (bottom layer). The top layer achieves a light absorption rate of 96.42 % across the full spectrum, while the bottom layer effectively reduces heat loss and ensures a continuous water supply. The evaporator achieves a high evaporation rate of 2.23 kg m −2 h −1 under one solar illumination, and has good salt tolerance and excellent stability. In particular, due to the reasonable combination of evaporators, the water yield reached 17.03 kg m −2 in the outdoor experiment with natural light for 9 h. In addition, the antibacterial rate of NiCo 2 O 4 nanofibers/chitosan aerogels against Escherichia coli was as high as 94 %. In this study, a bifunctional composite aerogel with high evaporation efficiency and strong antibacterial activity was proposed, which is expected to be applied in seawater desalination.
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Lifei Zhi,Shushan Yao,Eezhuang Zhang,Mingang Zhang
Micro–nanostructured NiCo 2 O 4 with controllable in situ growth on foam nickel has been successfully realized by introducing different surfactants as soft templates. Herein, several self-supporting NiCo 2 O 4 /NF electrode materials with different dimensions, different morphologies, and excellent electrochemical properties were prepared. The effects of the surfactant type, structure, and reaction conditions on the morphologies, structures, and electrochemical properties of the materials were studied in detail. The results show that NiCo 2 O 4 materials can regulate the formation of flake and fibrous structures of different sizes using a linear anionic surfactant. With the increase in temperature, the cationic surfactant (DMHAC10) can regulate the formation of flake → cactus → fibrous structure. Also, the Gemini cationic surfactant (GC-A) can regulate the formation of flake → cactus ball → urchin-like → fibrous structure. The growth of NiCo 2 O 4 on NF was prevented due to nonionic surfactants. Counter ions only affect the size of the material structure, but the material morphology is unaffected, and the surfactant concentration slightly affects the material morphology. The results of the electrochemical properties showed that the cactus ball NiCo 2 O 4 /NF material of a three-dimensional multistage structure was prepared by adding GC-A at 120°C for 6 h. The prepared material has excellent electrochemical properties such as higher specific capacity (4.74 F/cm 2 ), better charge–discharge ratio, and better cycle stability.
✓ 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）