APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Peng-jie Zhu,Fang-yuan Su,Li-jing Xie,Xiao-Ming Li,Yong-feng Li,Cheng-Meng Chen
Research into environmentally friendly energy storage devices is a vital strategy to address the energy crisis and environmental pollution challenges. In this paper, oxygen-rich vacancy Co 3 O 4 /NiCo 2 O 4 heterojunction hollow nanocage electrodes were synthesized by a two-step hydrothermal and calcination method. Taking advantage of its unique structure, oxygen vacancies, and the synergistic effect of multi-element transition metal oxides, the electrode has good conductivity, high specific surface area, and abundant active sites. As a result, the Co 3 O 4 /NiCo 2 O 4 HHNCs electrode exhibits an ultra-high specific capacitance of 1788F g −1 at 1Ag -1 , and the assembled hybrid supercapacitor has an energy density of up to 43.9 Wh kg −1 , which is promising for applications in energy storage materials.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Chulei Zhao,Chaoyun Ma,Fuping Zhang,Wenjun Li,Chenglin Hong,Fuxi Bao
Luminol has garnered significant attention from analysts as one of the most effective and commonly used electrochemiluminescence (ECL) reagents. However, the efficient luminescence of luminol anode is limited by the excitation of various reactive oxygen species (ROS). Typically, ROS are generated through co-reactive reagents and dissolved oxygen. Unfortunately, the former suffers from two drawbacks, namely biotoxicity and instability, while the latter cannot offer sufficient oxygen due to its limited solubility in aqueous solutions. Consequently, a low decomposition rate is usually obtained, leading to insufficient ROS. Therefore, there is an urgent need to develop efficient luminol anode systems. This study focuses on the use of zeolitic imidazolate framework-67 (ZIF-67) as a template, employing a controlled chemical etching method to create a ZIF-67/Ni-Co-layered double hydroxide (LDH). The intermediate composite is then annealed in air, resulting in the formation of a Co 3 O 4 /NiCo 2 O 4 double-shelled nanobox (DSNB) heterostructure . Due to its structural advantages, the DSNB exhibits excellent electrocatalytic performance in the oxygen evolution reaction (OER). Furthermore, it was found that both the intermediates and products of OER can directly participate in the luminol chemiluminescence process, ultimately resulting in a 700-fold increase in the electrochemiluminescence (ECL) signal compared to an equal molar concentration of luminol solution. This work not only establishes the OER-mediated ECL system but also deepens the understanding of the relationship between ROS and luminol, providing a new pathway to study the luminol anodic ECL luminescence system.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2018
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IF 5.667
Bei Xue,Kezhi Li,Shengyue Gu,Leilei Zhang,Jinhua Lu
Nanocrystalline transition metal oxides have attracted a great deal of attention due to their good electrochemical activity. To pursue novel active electrode materials with low detection, high sensitivity and good selectivity for the detection of H 2 O 2 , Ni foam-supported ZnO nanowires and Co 3 O 4 /NiCo 2 O 4 double-shelled nanocages (ZnO/Co 3 O 4 /NiCo 2 O 4 /Ni foam) have been successful fabricated by facile and effective methods When tested as an enzymatic-free H 2 O 2 electrochemical sensor, the obtained ZnO/Co 3 O 4 /NiCo 2 O 4 /Ni foam exhibits fast response time within 5 s, low detection limit of 0.163 μM (S/N = 3), high sensitivity of 0.388 mA mM −1 cm −2 , wide linear range from 0.2 μM to 2.4 mM (R 2 = 0.996), exhibiting good selectivity and long-term stability. The reason is that special structure of the ZnO nanowires could provide direct electrical pathways for the fast electron transport and Co 3 O 4 /NiCo 2 O 4 double-shell nanocages provide abundant mesopores and large specific surface area to enhance the catalytic activity of H 2 O 2 detection. These results suggest that the ZnO/Co 3 O 4 /NiCo 2 O 4 /Ni foam could be considered as a promising electrode material to build electrochemical biosensor.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
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2021
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IF 3.605
Zhaogen Zhu,Jinming Zhang,Xiaomin Peng,Yiyi Liu,Tianlun Cen,Zhifeng Ye,Dingsheng Yuan
Developing efficient bifunctional electrocatalysts with excellent oxygen reduction and evolution reaction (ORR/OER) activity to meet practical demands in Zn–air batteries (ZABs) is highly crucial and challenging. Herein, a simple hydrothermal one-step method is exploited to successfully synthesize Co3O4–NiCo2O4 anchored on N-doped reduced graphene oxide nanosheets (Co3O4–NiCo2O4/N-RGO). The active sites present in Co3O4–NiCo2O4/N-RGO and the synergy between N-RGO and Co3O4–NiCo2O4 accelerate the charge transfer and transport rate during the electrochemical course, which improves the ORR/OER activities of the Co3O4–NiCo2O4/N-RGO electrocatalyst. As expected, the Co3O4–NiCo2O4/N-RGO exhibits a better half-wave potential in the ORR and a lower Tafel slope during the OER process. A ZAB with optimal Co3O4–NiCo2O4/N-RGO as the cathode gives a higher open-circuit voltage (1.49 V), larger power density (97 mW cm–2), and better stability (180 h).
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Meimei Wang,Yunke Cui,Hongyang Cao,Ping Wei,Chen Chen,Xiuyan Li,Juan Xu,Guoping Sheng
In this study, zeolitic imidazolate framework-67 (ZIF-67) derived Co 3 O 4 /NiCo 2 O 4 double-shelled nanocages (DSNCs) were fabricated and utilized as catalysts to activate peroxydisulfate (PDS) for bisphenol A (BPA) degradation. The results showed that Co 3 O 4 /NiCo 2 O 4 DSNCs exhibited superior BPA degradation performance over Co 3 O 4 NCs and NiCo 2 O 4 NCs. PDS combined with the interfaces of both the Co 3 O 4 inner shell and NiCo 2 O 4 outer shell to form complex, inducing the nonradical oxidation of BPA by electron abstraction. The double-shelled hollow structure helped to increase the instantaneous concentration of reactants in the void space of Co 3 O 4 /NiCo 2 O 4 DSNCs, thus promoting the decomposition of BPA. The Co 3 O 4 /NiCo 2 O 4 DSNCs had high selectivity for BPA degradation and were resistant to halogens and background organic matter in wastewater. Our work indicated that metal-organic framework (MOF)-derived nanomaterials with a hollow structure have a promising application prospect for persulfate-based advanced oxidation technology.
研究领域:
环境科学
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL RESEARCH
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2021
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IF 0.782
Jianning Li,Chunyong Zhang,Yingpin Wen,Yuyue Zhao,Yiwen Zhang,Li Shu,Hengfei Qin
Binary transition metal oxides exhibit improved properties including good redox potentials and electrical conductivities compared with single metal oxides as electrode materials in energy storage. Herein, ZIF-67 is prepared by a one-step method using Co2+ as the central metal ion, 2-methylimidazole as the organic ligand, and methanol as an organic solvent at room temperature. Hollow NiCo2O4 and sheet-like Co3O4/NiCo2O4 derived from bimetallic imidazolate framework precursors were synthesized by adding cobalt and nickel ions in appropriate proportions. A hollow and porous structure is achieved for the reaction between a nickel salt and ZIF-67, and this unique nanostructure provides a high active surface area, which is beneficial to the electrochemical properties. Several samples are prepared and used as electrode materials for electrochemical tests in 6 M KOH. As a result, the Co3O4/NiCo2O4 electrode with a sheet nanostructure showed a high specific capacitance of 846 F g−1 at a current density of 0.5 A g−1. This Co3O4/NiCo2O4 electrode material is promising for future studies on high-performance supercapacitors to solve emerging energy-related problems.
研究领域:
材料科学
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能源存储
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2026
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IF 8.4
Xueqin Wang,Shuaiyu Gao,Yuelin Zhao,Wenqi Wu,Hongyun Lai,Huifeng Li,Genban Sun
Lithium-oxygen (Li-O 2 ) batteries stand out as ideal candidates for next-generation energy storage due to their ultrahigh theoretical energy density. However, the sluggish kinetics of the oxygen reduction and evolution reactions at the cathode pose a major challenge, necessitating the development of efficient catalysts to overcome practical limitations. Herein, Fe-doped Co 3 O 4 /NiCo 2 O 4 heterostructures are synthesized as cathode catalysts via chemical etching, cation exchange, and thermal oxidation. The etching process creates a stable hollow nanocube structure that maximizes active site exposure while providing ample space for Li 2 O 2 storage and ion diffusion. A strongly interactive heterojunction forms at the Co 3 O 4 /NiCo 2 O 4 interface, with Fe doping further enhancing interfacial electron interaction to boost catalytic activity. When used in Li-O 2 batteries, this catalyst enables a remarkable discharge capacity of 9572 mAh g −1 , a low overpotential of 1.01 V, and stable cycling over 110 cycles, providing a new strategy for developing high-performance Li-O 2 battery cathodes.
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
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2017
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IF 4.798
Bei Xue,Kezhi Li,Lei Feng,Jinhua Lu,Leilei Zhang
Graphene (G) wrapped porous Co 3 O 4 /NiCo 2 O 4 double-shelled nanocages (Co 3 O 4 /NiCo 2 O 4 DSNCs@G) were prepared by the formation of Co 3 O 4 /NiCo 2 O 4 DSNCs using zeolite imidazole frameworks-67 as template with the subsequent calcination and package of G by hydrothermal method. The abundant accessible active sites provided by the porous structure of Co 3 O 4 /NiCo 2 O 4 DSNCs and efficient electron transport pathways for electrocatalytic reaction offered by the high conductive G worked very well together in a ferocious synergy, which endowed Co 3 O 4 /NiCo 2 O 4 DSNCs@G with excellent electrocatalytic behaviors for determining glucose. A comparison between Co 3 O 4 /NiCo 2 O 4 DSNCs without G packing and Co 3 O 4 /NiCo 2 O 4 DSNCs@G showed that former had linear response window concentrations of 0.01-3.52 mM (correlation coefficient = 0.999), detection limit of 0.744 μM (S/N = 3) and sensitivity of 0.196 mA mM −1 cm −2 , whereas the latter exhibited linear response window concentrations of 0.01-3.52 mM (correlation coefficient = 0.999), detection limit of 0.384 μM (S/N = 3) and sensitivity of 0.304 mA mM −1 cm −2 . The combination of Co 3 O 4 /NiCo 2 O 4 DSNCs and G was a meaningful strategy to fabricate high-performance non-enzyme glucose sensors with low detection limit, good selectivity and high sensitivity.
研究领域:
材料科学
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生物医学工程
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Wenhao Tang,Shiyan Deng,Youlan Zou,Huiyao Li,Shuang Deng,Zengsheng Ma
All-solid-state lithium sulfur batteries (ASSLSBs) hold significant promise in the application of high energy density batteries, yet they suffer from poor ionic conductivity, low Li + transference number and unsatisfactory lithium polysulfides (LiPSs) conversion. In this paper, porous-dual-shell structure and heterojunction Co 3 O 4 @NiCo 2 O 4 is prepared and composited with polyethylene oxide (PEO)-based solid polymer electrolytes (SPEs) to address these problems. The superimposed electric field for Co 3 O 4 @NiCo 2 O 4 composed of the heterointerfaces -build-in electric field and the surface oxygen-rich vacancies-build-in electric field facilitates the dissociation of Li salts, thus improving the ionic conductivity. It exhibits high ionic conductivity of 1.04 × 10 −3 S/cm and Li + transference number of 0.48 at 60 °C. Besides, the incorporation of Co 3 O 4 @NiCo 2 O 4 heterojunction enables fast LiPSs conversion and improves the electrochemical kinetics. The Li//Li cell can work stably for 1100 h at 0.1 mA/cm 2 . The Li//S cell provides an initial capacity of 1170 mA h/g, a reversible capacity of 620.1mA h/g after 100 cycles and 308.3 mA h/g after 450 cycles at 0.2 C.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
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IF 3.779
Shan Yan,Lina Xu,Jun Jiang,Hongping Xiao,Xinhua Li
Single-material electrodes do not satisfy the demands of high-performance supercapacitors. To exploit the advantages of both oxides and carbon-based materials, a tightly packed Co 3 O 4 /NiCo 2 O 4 /NiO/C&S nanocomposite is fabricated by sintering a Co/Ni-based coordination complex precursor at 400 °C. The composites and basic components are characterized using various techniques, namely, X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy , Brunauer–Emmett–Teller specific surface area analysis, and elemental analysis . The electrochemical performance is analyzed by cyclic voltammetry , galvanostatic charge/discharge cycling, and electrochemical impedance spectrometry . A uniform nanocomposite was found to be formed of NiCo 2 O 4 , NiO, and Co 3 O 4 nanoparticles , incompletely carbonized C, and incompletely vulcanized S. When used as supercapacitor electrodes, the synthesized composites show extra-long cycling stability (>20,000 cycles) during the charge/discharge process. This improvement in the cycle life of the composites is attributed to its highly stable structure. The roles of C and S in forming a stable structure are investigated. The results show that a supercapacitor with electrodes made from the as-prepared Co 3 O 4 /NiCo 2 O 4 /NiO/C&S composite will be promising for commercial applications.
研究领域:
材料科学
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电化学
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能量存储
·
纳米材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Lei Yuan,Na Xin,Yu Liu,Weidong Shi
Research on environmentally friendly energy storage devices is an important strategy to solve the energy crisis and environmental pollution. Herein, a novel self-supporting electrode based on multi-dimensional Co 3 O 4 /NiCo 2 O 4 hierarchical flakes coating on graphene/carbon sphere (rGO/CS) conductive substrate is reasonably designed. Firstly, a simple hydrothermal method is used to synthesize NiCo 2 O 4 with both flake and nanoneedle morphology on the rGO/CS substrate. Subsequently, Co 3 O 4 /NiCo 2 O 4 @rGO/CS is obtained by in-situ growth of metal organic frameworks polyhedrons on the surface of NiCo 2 O 4 flakes followed by calcination. In the unique structure, benefitting from the synergy between the substrate and multi-element transition metal oxides, the integrated film shows good conductivity, high specific surface area and abundant active sites. Thus, the binder-free electrode exhibits an ultra-high specific capacitance of 3876.6 F g −1 (538.4 mA h g −1 ) at 1 A g −1 . A hybrid supercapacitor is assembled with activated carbon as the negative electrode and Co 3 O 4 /NiCo 2 O 4 @rGO/CS as the positive electrode, the device shows a highest energy density of 56.5 Wh kg −1 at a power density of 800 W kg −1 . After 6000 charge–discharge cycles, 92.5% of the initial capacitance can be still maintained, indicating its good application prospects in energy storage materials.
研究领域:
材料科学
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能源存储
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）