JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2024
·
IF 2.6
Mou Yuhang,He Qing,He Ying,Meng Chenyao,Liu Hui,Li Liang
Supercapacitors as green energy storage devices are widely utilized in vehicle manufacturing, rail transportation, power systems, and other fields. In this study, petal-like NiO was synthesized via a one-step hydrothermal method, followed by the preparation of NiO@ZIF-67 composite electrode material at room temperature. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) tests demonstrated that the NiO in NiO@ZIF-67 possesses a porous petal-like structure, with ZIF-67 particles uniformly growing on NiO sheets. The effect of ZIF-67 content on the electrochemical performance of NiO was investigated, and results showed that NiO@ZIF-67/1, prepared with a mass ratio of NiO to Co(NO₃)₂·6 H₂O of 1:1, exhibits the optimal electrochemical performance. The specific capacitance of NiO@ZIF-67/1 electrode material reached 188.44 F·g⁻¹ at 1 A/g. Furthermore, the symmetric supercapacitor assembled with NiO@ZIF-67 exhibited a maximum energy density of 41.76 Wh/kg at 1.4 kW/h, with a capacitance retention rate of 87.2% after 5000 cycles. Graphical abstract
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
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Haiping Lei,Tianwei Wei,Jiguo Tu,Yiwa Luo,Suqin Li,Shuqiang Jiao
NiO possesses a high theoretical capacity, but its poor conductivity and significant volume changes during the redox process lead to severe electrochemical performance degradation, limiting its applications. In this study, flower-like structure NiO@C composite materials were synthesized via a hydrothermal method. The particle size of the material is approximately 10–16 μm, with a well-defined morphology of carbon material composite. Al-NiO@C batteries were constructed using NiO@C cathode and subjected to electrochemical performance testing. The initial discharge capacity of NiO@C composite material at a current density of 200 mA g −1 is 126 mA h/g, and even after 150 cycles, it retains a discharge specific capacity of 54 mA h/g. In contrast, the pure NiO exhibits an initial capacity of only 49 mA h/g, which decreases to 23 mA h/g after 150 cycles. The cycling stability of NiO@C material is significantly better than that of NiO alone. This improvement is attributed to the enhanced conductivity of NiO material by the addition of carbon material, which provides improved electron/ion transport properties. Additionally, the inclusion of carbon material helps alleviate the volume changes of NiO during the reaction process, thereby enhancing the overall electrochemical performance of Al-NiO batteries.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
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IF 6.361
Jiajia Zhang,Fang Cui,Linxu Xu,Qinghai Ma,Yiwen Gao,Yang Liu,Tieyu Cui
Herein, a facial stratagem for the large-scale synthesis of NiO/C nanosheets used as magnetic adsorbents is proposed by using nanoscale coordination polymers (nanoCPs) as precursors. The NiO nanoparticles (NPs) scattered on the NiO/C nanosheets have an untrasmall size (~3 nm) as well as uniform dispersion, since the Ni 2+ ions are preassembled into the nanoCPs precursors by coordination bonds and transformed to NiO NPs in situ under the restriction of carbon layers. Thanks to the small size and spatially uniform distribution of NiO NPs , fully exposed carbon matrix containing part of graphene structures, and the high specific surface area of the special nanosheet structure, the magnetic NiO/C nanosheets have an a great breakthrough in the adsorption performance toward Congo Red (CR) among many reported NiO-based materials. The maximum adsorption capacity for CR is up to 2000 mg/g, and the adsorption kinetics and thermodynamics are also systematically studied. Moreover, the NiO/C nanosheets can be separated from water and reused simply by an external magnetic field. The NiO/C nanosheets with low cost and extraordinary adsorption ability have great potential in water pollution treatment area.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2020
·Vol. 167
·期 14
·146512
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IF 3.721
Luyi Zhu,Zhenbo Wei,Jun Wang,Jianli Zhong
It is of great importance to determine the quantification of glucose in human serum. In this work, a novel NiO nanoflower/polymethylene blue (NiO/PMB) modified glassy carbon electrode (GCE) was fabricated and taken as a non-enzymatic glucose biosensor. The composite was characterized by field-emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD). The electrochemical properties of the modified biosensor were investigated by the cyclic voltammetry (CV) method. This biosensor combined the advantages of NiO nanoflower and PMB, so that a series of characterization results indicated that the composite material exhibiting satisfactory catalytic activity towards glucose. The quantitative determination of glucose was carried out by chronoamperometric measurements (i–t) method and showed linear ranges between 3−50 μM and 50−80 μM, with the limit of detection (LOD) of 2 × 10 −7 M (S/N = 3). Under optimal conditions, the sensitivity of the self-assemble biosensor was calculated to be 413.06 μ A cm−2 mM−1 for glucose. The selectivity, reproducibility, and stability of the glucose biosensor were also confirmed in the study. In addition, this glucose biosensor was successfully applied for the analysis of glucose in real human serum samples.
研究领域:
生物传感技术
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医学诊断
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Zhaopeng Li,Pei Li,Jinfu Zhang,Helei Yang,Zhiguo Zhu,Hua Zhou,Xia Sun,Zhenhe Wang
This study reports on the development of a NiO quantum dot-modified ZnO gas sensor, which is designed for detecting ethyl formate, a crucial indicator of fish meal spoilage. The results indicated that NiO quantum dots were uniformly dispersed on the surface of ZnO, leading to the formation of a P N heterojunction that enhanced the gas sensing properties. Among the sensors tested, the S2 sensor (with a NiO doping of 0.1 mmol) exhibited the highest response value of 15.75 when exposed to 100 ppm of ethyl formate at 260 °C, additionally presented out excellent selectivity, linear response behavior, and long-term stability. The superior performance of the S2 sensor can be attributed to its unique jackfruit-like structure and the formation of P N junctions. These features increase the number of active sites and modulate the electronic properties of the material. The S2 sensor has been implemented for the assessment of fish meal freshness. This study emphasizes the great potential of this sensor for the real-time monitoring of fish meal freshness, offering significant applications in the field of food and feed safety.
研究领域:
材料科学
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纳米技术
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食品安全
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化学传感
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 22
·12775-12788
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IF 4.22
Xie Kaihong,Guo Peijing,Xiong Zhangyi,Sun Sufang,Wang Haijun,Gao Yongjun
Well-dispersed Ni-based nanocrystals with Ni/NiO hybrid nanostructure are built on cellulose-derived carbon (Ni-C-500), which exhibits outstanding photocatalytic performance in the hydrogen evolution from water. Control experiments confirm that the optimal nickel content in Ni-C-500 is 16 wt% and the optimum calcination temperature is 500 °C. The hydrogen evolution rate on Ni-C-500 in the presence of Eosin Y and triethanolamine (TEOA) reaches 13.5 mmol/g cat /h in the first hour, which is even higher than that on commercial Pt/C catalyst (11.4 mmol/g cat /h). The carbon support facilitates the transfer of photogenerated electrons from photosensitizer to Ni-based nanocrystals, efficiently preventing the recombination of photogenerated electrons and holes during the photocatalytic procedure. Density functional theory (DFT) calculations further demonstrate that the NiO islands on Ni(111) surface facilitate the adsorption of water molecules because of the interaction between the oxygen atom of NiO island and the hydrogen atom of water. Furthermore, produced H ad around NiO island of Ni(111) surface is more easily to form hydrogen on Ni/NiO hybrid nanostructure than on clean Ni(111) surface. Graphical abstract Ni/NiO hybrid nanostructure supported on biomass carbon for visible-light photocatalytic hydrogen evolution
研究领域:
材料科学
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能源化学
✓ 已验证
DOI
高影响因子
Chemistry-An Asian Journal
·
2018
·Vol. 14
·期 3
·431-437
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IF 3.692
Wei Wei,Xiangyu Gu,Yuze Liu,Zejun Zheng,Shaoyang Li,Zhilin Mei,Ang Wei
Graphical Mind the gap ! An electrochromic device with a nanoporous NiO/ZnO nanoarray working electrode was constructed and assembled (see figure). The nanoporous NiO/ZnO nanoarray film was prepared on indium tin oxide (ITO) glass substrate through a two-step route that combined chemical bath deposition and hydrothermal methods. The nanoporous NiO/ZnO nanoarray electrode has an improved electrochromism compared with that of nanoporous NiO alone as a result of the 3D structure. An electrochromic device with the as-obtained nanoporous NiO /ZnO nanoarray as a working electrode was constructed and assembled. The nanoporous NiO/ZnO nanoarray film with a three-dimensional structure was prepared on indium tin oxide (ITO) glass substrate through a two-step route that combined chemical bath deposition method with a hydrothermal method. The nanoporous NiO/ZnO nanoarray electrode reveals a noticeable improvement in electrochromism compared with that of nanoporous NiO alone, including higher optical modulation (81 %), higher coloration efficiency (78.5 cm 2 C −1 ), faster response times (2.6 and 9.7 s for coloring and bleaching, respectively), and favorable durability performance. Such enhancements are mainly attributed to the three-dimensional structures of nanoporous NiO coated on ZnO nanoarray, namely, 1) the uniform hexagonal ZnO nanoarray loads more nanoporous NiO, 2) nanoporous NiO cross-linked with ZnO nanorods provides a loose interspace morphology, 3) stronger adhesion between ZnO nanorods and ITO covered with ZnO seed, 4) core–shell and cross-linked structures promote electrolyte infiltration, and 5) appropriate band gaps improve charge transfer.
研究领域:
材料科学
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纳米技术
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2021
·Vol. 11
·期 23
·7632-7639
·
IF 6.119
Hongjiao Wang,Bo Fan,Zhongkuan Luo,Qixing Wu,Xuelong Zhou,Fang Wang
The development of high-performance cathodes is critical to promoting the development of Li–O2 batteries. In this work, three-dimensional NiCo2O4 nanowire-decorated NiO nanosheets (NiO@NiCo2O4) on a Ni foam were fabricated by a two-step solvothermal process. The product exhibited efficient catalytic performance for Li–O2 batteries. This three-dimensional NiO@NiCo2O4 hierarchical structures grown on Ni foam forms a porous catalytic surface for the uniform growth of discharge products. First, NiCo2O4 is a promising catalyst for improving the oxygen reduction reaction/oxygen evolution reaction (ORR/OER) processes for the Li–O2 batteries. Second, NiO can provide a porous scaffold for the further deposition of NiCo2O4 nanowires to avoid their aggregation. Furthermore, NiO can promote the decomposition of by-products containing carbonate/carboxylate species. As a result, the Li–O2 system with NiO@NiCo2O4 as a carbon-free cathode showed a maximum in-depth-specific discharge capacity of 9361.4 mA h g−1 at a current density of 100 mA g−1 and 176 cycles of stability under a limited capacity of 500 mA h g−1 at a current density of 200 mA g−1. The reported strategy regarding a multicomponent hierarchical structure may provide a new approach for effective electrocatalyst design for Li–O2 batteries.
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 SURFACE SCIENCE
·
2022
·
IF 7.392
Jiayi Qi,Xingkun Qi,Yan Pan,Junshuo Cui,Ying Xiong,Weijun Shan,Haibiao Yu
Sm 0.06 Ni with excellent H 2 O resistance for eliminating N 2 O was prepared by co-precipitation method. Research indicated that the introduction of Sm into Sm 0.06 Ni has the following effects: (1) Sm species (Sm 2 O 3 ) highly dispersed on the surface of Sm 0.06 Ni catalyst, which not only decreased the crystallite size of NiO, but also produced a certain number of edge dislocations and defects. (2) Sm 2 O 3 weakened the Ni-O band and increased the number of active sites. (3) The redox cycle of Ni 2+ + Sm 3+ ↔ Ni 3+ + Sm 2+ was formed on the surface of Sm 0.06 Ni during the reaction. Based on the above changes, Sm 0.06 Ni exhibited superior catalytic performance and much lower E a for the reaction compared with pure NiO. Over Sm 0.06 Ni, the TOF at 350 ℃ was 4.1 × 10 −3 s −1 , 37 times of that over pure NiO. More importantly, Sm 0.06 Ni exhibited excellent H 2 O resistance performance under submitted real reaction conditions, about 76 % N 2 O conversion can be obtained at 400 ℃.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yang Chao,Wenxue Ke,Wenyao Zhou,Yu Cui,Jianbin Lin,Ping Liang,Xin He,Chi Zhang
The construction of perovskite/metal oxide heterostructure is a practical approach to enhancing the catalytic activity of perovskite oxides for oxygen evolution reaction (OER). The heterostructures are generally fabricated by physical/chemical deposition with inferior controllability. This work presents a facile acid etching method to construct a LaNiO 3 /NiO heterostructure from La 1–x Sr x NiO 3 perovskite oxides. The selective dissolution of A-site elements in acid facilitates the exsolution of Ni to form NiO nanoflakes on the surface. The phase evolution of La 1–x Sr x NiO 3 upon acid etching is associated with both Sr content and etching duration. For La 0.95 Sr 0.05 NiO 3 etched for 10 h (LSN5–10 h), the obtained catalyst had an overpotential of 385 mV at 10 mA cm –2 in 1 M KOH, 285 mV lower than the pristine LSN5. The turnover frequency (TOF) value obtained at an overpotential of 450 mV is 0.97 S –1 , 2.55 times larger than the pristine LSN5, demonstrating its excellent catalytic efficiency. Long-term tests in 1 M KOH further enhanced the OER performance, which could be ascribed to the formation of highly active NiOOH. The excellent OER performance of the LaNiO 3 /NiO heterostructure is attributed to the efficient charge transfer at the interface and the large surface areas of NiO nanoflakes. This work demonstrates an artificial surface decoration method via surface etching to improve the OER activity and stability of Ni-based perovskite oxides.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2024
·
IF 11.3
Xing Li,Lei Xing,Guoxiong Zhan,Zhoulan Huang,Zhen Chen,Huazhen Chang,Junhua Li
Catalytic carbamate decomposition is a feasible option for reducing the heat duty of amine solvent regeneration during the chemisorption of CO2 capture; advanced material with excellent proton transfer and exchange performance is crucial to boost the decomposition kinetics in an alkaline environment. Here, we prepared magnetic heterostructure Ni/NiO nanocatalysts with tunable Ni(0) nanoparticles and NiO support. The heterointerface of the proposed materials creates abundant surface oxygen vacancies (OVs) and offers abundant reactive active sites ascribed to the special electron transfer scheme of Ni0–NiO. The generated surface hydroxyls and unsaturated coordinated Ni, respectively, provide transferable protons and electrons, involved in the deprotonation of RNH3+ and C–N break of RNHCOO–. Thus, the obtained nanomaterials achieved considerably improved CO2 desorption of up to 3 mmol/min for a CO2-saturated monoethanolamine solvent, representing a substantial (approximately 50%) increase over the catalyst-free case. The reinforcement mechanism of OV generation by the Ni/NiO heterostructure and the induced proton transfer were revealed through in situ spectroscopic measurement and theoretical calculations. The results verified that the OVs stimulate the production of surface hydroxyls and water-assisted proton hopping, providing an advantageous condition for carbamate decomposition.
研究领域:
材料科学
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催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2020
·Vol. 26
·期 8
·3831-3840
·
IF 2.394
Pei Mengchun,Wu Yuandong,Qi Zhiqiang,Mei Dajiang
NiO/Fe 3 O 4 /rGO composite materials were successfully obtained via a solvothermal route and characterized by charge/discharge test, TEM, XRD, SEM, EIS, HRTEM, XPS, CV, etc. The results showed that the Fe 3 O 4 nanospheres have an average size around 150 nm, NiO is relatively larger (about 300 nm) and agglomerated by rod-shaped particles. The nanospheres of Fe 3 O 4 and rod-shaped NiO particles were distributed on the surface of reduced grapheme oxide. The BET specific surface and BJH desorption average pore diameter of NiO/Fe 3 O 4 /rGO are 497.26 m 2 g −1 and 1.23 nm, respectively, so it improves the contact area between electrode materials and electrolyte, make ion diffusion path shorter and facilitates ion insertion/desertion. Discharge capacity was 841 mAh g −1 at the first cycle and maintain 647 mAh g −1 after 200 cycles at the current density of 500 mA g −1 , and even at the current density of 1000 mA g −1 , the discharge capacity can keep 582 mAh g −1 after 200 cycles with a well Coulombic efficiency and retention. And electrochemical impedance of NiO/Fe 3 O 4 and NiO/Fe 3 O 4 /rGO is 110 Ω and 75 Ω, respectively, indicating that the material has a good ionic conductivity.
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）