Energy Technology
·
2024
·Vol. 12
·期 7
·2400062
·
IF 3.6
Demin Jiang,Huina Chen,Liangjuan Zhu,Wei Wang,Yuqiao Wang
Biofouling of air cathode surface decreases the electricity generation performance of membrane-free microbial fuel cells (MFCs). Ag@Co/Zn N-doped carbon (Ag@Co/Zn-NC) is designed as an antibacterial oxygen reduction reaction (ORR) catalyst to inhibit biofouling on the cathode surface. The Co/Zn-NC active component promotes ORR catalytic activity through the advantages of well-distributed Co nanoparticles and numerous active sites. Superficial Ag nanoparticles act as antibacterial active species to inhibit bacterial proliferation and suppress biofilm growth. Ag@Co/Zn-NC catalyst prevents bacterial adhesion and biofilm formation, effectively preventing excessive biofouling on the cathode surface. The antibacterial catalyst maintains a high catalytic activity and good ion diffusion properties without the adverse effects of biofouling, resulting in enhanced ORR durability of the air cathode. The assembled MFCs achieve high electricity generation during long-term cyclic operation. The maximum power density retention percentage (82.6%) is higher than that of Co/Zn-NC MFC (65.3%) and Pt/C MFC (52.4%) after continuous operation for 1200 h. Excellent operational durability is revealed for the air-cathode MFCs assembled with the antibacterial ORR catalyst during the cyclic process. The novelty of this study is that the design of antibacterial catalysts inhibits the excessive growth of the cathode biofilm to improve the cyclic electricity generation performance of MFCs.
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Yunlong Deng,Tong Liu,Lin Lv,Mengwen Fan,Guoan Ma,Xiaoxue Yang,Zhishan Li,Dafeng Yan,Guokun Ma,Hanbin Wang,Houzhao Wan,Chundong Wang,Hao Wang
Exploitation of high-efficient and cost-effective electrocatalysts for oxygen evolution reaction (OER) is extremely urgent due to the sluggish kinetics nature of OER and its wide use in the field of energy storage and conversion. Herein, we report a yolk-shell structured schottky catalyst composed of CoFe alloy core and Co-Fe sulfides shell (designated as CoFe/Co-Fe-S) as efficient OER catalyst via a simple two-step preparation method. The as-fabricated CoFe/Co-Fe-S schottky catalyst not only shows remarkable OER activity with a low overpotential of 263 mV at 10 mA cm −2 and a low Tafel slope of 43 mV dec −1 , but also presents robust long-term stability behaviors, showing its potential for applications in aqueous alkaline Zn-air batteries and solid-state devices. Theoretical analysis unveils that the boosted OER activity originates from the unique yolk-shell structured schottky catalyst, in which the three-dimensional ion channels, interfacial electron redistribution, dual-metal active sites allow the accelerated electron transfer, the favorable ion transportation and penetration and the optimized electron spin configuration of Co 2+ d z 2 orbit, finally, promoting the optimized deprotonation of OOH∗ to form O-O bond.
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Mengxia Cui,Yang Yu,Xinghua Li,Mingzhuang Liu,Weijian Shi,Jiaxing Li,Haihan Li,Yu Liu,Fang Zhang,Wenbo Wang,Hancheng Zhu,Xiaowei Li,Changlu Shao,Yichun Liu
Vanadium-based materials are promising cathodes for high electrochemical performance aqueous Zn-ion batteries (AZIBs) due to their high specific capacity and multielectron redox reactions. However, vanadium-based materials suffer from low intrinsic conductivities and slow reaction kinetics, leading to poor rate performance. Here, we introduce vanadium nitride-oxide (VOVN) composites fabricated through a thermal conversion strategy, which exhibit high capacity and superior rate performance. The interface regulation of V 2 O 3 and VN composite promotes charge carrier transport and enhances cathode reaction kinetics. Additionally, the dual energy storage mechanism in VOVN composites facilitates highly reversible Zn 2+ storage processes. Consequently, the VOVN cathode demonstrates high discharge capacity (445.3 mAh g −1 at 0.1 A g −1 ), excellent rate performance (151.4 mAh g −1 at 30 A g −1 ), and fast diffusion coefficient (10 −9 –10 −10 cm 2 s −1 ). This study provides a straightforward and effective approach to developing high-performance cathodes for AZIBs.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Ziming Wang,Fangbing Liu,Dongyu Pei,Hanbo Wang,Sheng Wan,Yan Wang,Mingrui Yu,Kechang Li,Haiyan Lu
As environmental and carbon emission issues become increasingly severe, electrochemical energy storage systems have gained attention. Compared to traditional supercapacitors, zinc-ion hybrid capacitors (ZIHCs) are not only environmentally friendly but also cost-effective. MnO 2 , with its low cost, eco-friendliness, high theoretical capacity, and stable crystal structure, is considered a promising positive electrode material. In this study, the morphology of MnO 2 was optimized using electrodeposition. During cycling, zinc ions reversibly intercalate and extract from MnO 2 , forming a cactus-like nanoflower structure. This structure is loose and porous, providing ample reaction space for active materials. The assembled device exhibits excellent performance in both energy density (85.68 Wh kg −1 ) and stability (91.60 %).
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ChemistrySelect
·
2024
·Vol. 9
·期 46
·e202404170
·
IF 1.9
Pengtao Sheng,Haiyan Xu,Yaqi Zhang,Haiyue Xia,Haipeng Liu,Weili Li
Graphical We present a surfactant-associated controlled synthesis of copper (Cu)-deficient zinc (Zn)-doped Cu-indium (In)-selenium (Se) QDs, followed by a mechanistic investigation of their photophysical properties using surfactants. The findings described here are expected to provide a general strategy for enhancing the tunability of photophysical properties in other QDs systems. The shape and size-controlled synthesis of colloidal I−III−VI quantum dots (QDs) can be attained only by a few synthesis strategies via the introduction of various high-boiling-point organic surfactants. To further investigate this strategy, in this study, we present a surfactant-associated controlled synthesis of copper (Cu)-deficient, zinc (Zn)-doped Cu─indium (In)─selenium (Se) QDs, followed by a mechanistic investigation of their photophysical properties using surfactants, such as oleylamine (OLA), oleic acid (OA), and diphenylphosphine (DPP). OLA significantly promoted the quantum size effect-resultant emission wavelength red-shift, while OA controlled the homogeneous growth of QDs and improved the quantum yields. Moreover, Gaussian deconvolution of the photoluminescence spectra and the bandgap derived from the absorption spectra, by fitting, supported the fact that the radiative transition channels, especially for surface-trap-state-related transitions, are also dependent on the surfactants. Specifically, the conduction band electron-intragap state transitions and donor-acceptor transitions were present in all the prepared samples but accounted for different percentages. Furthermore, the surface-trap-state-related transitions significantly faded upon adding (i) OLA/OA as the sole surfactant to the cationic precursor and (ii) the OA + OLA + DPP mixture to the anionic precursor. The findings described here are expected to provide a general strategy for enhancing the tunability of photophysical properties in other QDs systems.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Jiming Wang,Min Ji,Jiaqi Lv,Min Wang
Photo-thermo-chemical dry reforming of methane (PTC-DRM) produces syngas has been a promising strategy to utilize abundant solar energy and alleviate greenhouse effect. Herein, we report an efficient PTC-DRM process on Ni-based catalyst with Zn doping and investigate the effect of Zn on the catalytic performance of catalysts. Zn promoted the generation of active sites on the surface of Ni-Al 2 O 3 , suppressed the accumulation of coke during the reaction process and enhanced the photocatalytic activity of the catalyst. Ni-ZnO-Al 2 O 3 catalyst exhibited highest thermal catalytic performance and the conversion of CH 4 and CO 2 are 50.2% and 58.1% at 650 ℃, respectively. All catalysts exhibited higher reaction rates of CH 4 and CO 2 and higher hydrogen selectivity under light conditions. Light also significantly enhanced the carbon deposition resistance and stability of the catalyst. And possible reaction mechanism of the Ni-ZnO-Al 2 O 3 was proposed during PTC-DRM process.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2024
·Vol. 54
·期 1
·634-646
·
IF 2.2
Liu Xinyu,Li Mingzhao,Shi Chonghua,Wang Jing,Yao Shaowei
Sodium-ion batteries are considered promising for large-scale energy storage due to their abundance. Therefore, it is crucial to develop stable anode materials with high specific capacity. SnO 2 was coated with Zn/Co-zeolitic imidazolate frameworks (ZIFs) by using the solvothermal method to obtain SnO 2 @Zn/Co-ZIFs. Then, Sn@Zn/Co-NPC (N-doped porous carbon) was obtained through heat treatment in an inert atmosphere. In this material, Sn provides a higher capacity, while Zn/Co-NPC not only can provide part of the capacity and increase the conductivity of the material, but also helps alleviate the volume expansion of Sn during the charge and discharge process. Therefore, the effect of the amount of Sn on the electrochemical properties of the materials was investigated by varying the addition of SnO 2 . The results show that the 50Sn@Zn/Co-NPC electrode material retains a discharge specific capacity of 334.90 mAh g −1 after 100 cycles at 100 mA g −1 current density. After 200 cycles at 500 mA g −1 current density, 50Sn@Zn/Co-NPC electrode material still has 275.80 mAh g −1 discharge specific capacity. The 50Sn@Zn/Co-NPC electrode material has excellent electrochemical properties. Therefore, this paper provides a reference for the design of stable, long-cycle, and low-cost anode materials for sodium-ion batteries.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Fulian Kang,Yang Li,Zhiyuan Zheng,Xinya Peng,Jianhua Rong,Liubing Dong
Aqueous Zn-ion hybrid supercapacitors (ZHSs) are attracting significant attention as a promising electrochemical energy storage system. However, carbon cathodes of ZHSs exhibit unsatisfactory ion storage performance due to the large size of hydrated Zn-ions ( e.g. , [Zn(H 2 O) 6 ] 2+ ), which encumbers compact ion arrangement and rapid ion transport at the carbon-electrolyte interfaces. Herein, a porous carbon material (HMFC) with abundant sub-nanopores is synthesized to optimize the ion storage performance of the carbon cathode in ZHSs , in which the sub-nanopores effectively promote the dehydration of hydrated Zn-ions and thus optimize the ion storage performance of the carbon cathode in ZHSs . A novel strategy is proposed to study the dehydration behaviors of hydrated Zn-ions in carbon cathodes, including quantitatively determining the desolvation activation energy of hydrated Zn-ions and in-situ monitoring active water content at the carbon-electrolyte interface. The sub-nanopores-induced desolvation effect is verified, and its coupling with large specific surface area and hierarchically porous structure endows the HMFC cathode with improved electrochemical performance, including a 53 % capacity increase compared to the carbon cathode counterpart without sub-nanopores, fast charge/discharge ability that can output 46.0 Wh/kg energy within only 4.4 s, and 98.2 % capacity retention over 20,000 charge/discharge cycles. This work provides new insights into the rational design of porous carbon cathode materials toward high-performance ZHSs.
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PubMed
高影响因子
Nanoscale
·
2024
·
IF 5.8
Ziyin Yang,Yaqi Kong,Chengcheng Qi
Compared with transition metals with partially occupied 3d orbitals, Zn has a filled 3d10 configuration, which severely restricts electron mobility and hence usually renders Zn2+ intrinsically inactive for electrochemical sensing. Metal single-atom catalysts are a new kind of sensing material. Owing to their unique coordination structure and high atomic utilization rate, metal single-atom catalysts show unique properties, which makes them promising for use in the field of electrochemical sensing. However, whether Zn single atoms are active sites remains to be elucidated. In this study, we prepared nitrogen-doped carbon (NC) materials by pyrolyzing ZIF-8 at high temperatures and reported that when the pyrolysis temperature was 800 °C, many Zn single atoms with Zn-N4 coordination structures remained in the NC material. Even when the pyrolysis temperature is increased to 1000 °C, a small number of Zn single atoms remain, and the coordination structure changes from Zn-N4 to Zn-N3. Furthermore, unexpectedly, both residual Zn single atoms showed electrocatalytic activity for H2O2 reduction. In particular, the electrocatalytic activity was significantly enhanced after the coordination structure was changed from Zn-N4 to Zn-N3. Density functional theory (DFT) calculations indicate that the coordination structure of Zn-N3 optimizes the adsorption and desorption strength of oxygen-containing species in the electrocatalytic reaction process, which lowers the energy barrier of the rate-determining step and increases the detection sensitivity of H2O2 nearly 4.1 times. This study revealed new properties of Zn single atoms for the electrocatalytic reduction of H2O2 and developed a strategy to increase the electrocatalytic activity of metal single-atom catalysts through coordination number regulation, which lays the foundation for the use of Zn single atoms in the field of electrochemical sensing and provides ideas for the design of new highly active sensing materials.
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PubMed
高影响因子
Results in Chemistry
·
2025
·
IF 4.2
Fuhua Wei,Peng Chen,Qinhui Ren,Qin Zhang,Wei Shang,Diaodiao Zhang,Min Li,Zhao Liang
The Co/Zn-MOFs material was synthesized successfully via the solvothermal method and then underwent calcination at 900 °C. To investigate its structural properties, multiple characterization techniques were applied, such as scanning electron microscopy (SEM), Fourier-transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), and nitrogen adsorption-desorption isotherms. These analyses aimed to assess the features of the carbon material for its efficacy in minocycline removal. The experimental findings demonstrated that the ideal conditions for maximizing minocycline adsorption on the carbon material obtained from Co/Zn-MOFs comprised a dosage of 20 mg, a solution concentration of 50 ppm, and a pH level of 10. Furthermore, kinetic studies revealed that the pseudo-second-order model accurately represented the experimental data. In conclusion, this research underscores the remarkable adsorption capability of the carbon material derived from Co/Zn-MOFs for minocycline, indicating potential applications in environmental cleanup and presenting an innovative approach for environmental preservation.
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高影响因子
RARE METALS
·
2024
·
IF 9.6
Cheng Chao,Zhi Chuang,Sun Zhong-Ti,Ming Yong-Qiang,Xiang Ting-Ting,Zhu Qing-Chao,Wu Zi-Rui,Li Bing,Li Yi,Jin Cheng,Cao Yong,Yang Juan
Dual-phase heterointerface electrocatalysts (DPHE) constructed by oxygen reduction reaction (ORR)- and oxygen evolution reaction (OER)-active elements exhibit excellent bifunctional activity and long-term durability due to the abundant interface exposure and synergistic catalytic effect. Herein, low-dimensional N-doped graphene nanoribbons (N-GNRs) coupling with ultrathin CoO nanocomposites (N-GNRs/CoO) were controllably fabricated through a facile two-step approach using synthesized Co(OH) 2 nanosheet as CoO precursor. Density functional theory (DFT) calculations and experimental characterizations prove that the formation of interface between N-GNRs and CoO can induce local charge redistribution, contributing to the improvement of catalytic activity and stability. The optimal N-GNRs/CoO DPHE possesses hierarchically porous architectures and presents outstanding bifunctional activities with a small potential gap of 0.729 V between the potential at 10 mA·cm −2 for OER and the halfwave potential for ORR, which outperforms Pt/C + IrO 2 and the majority of noble-metal-free bifunctional catalysts. Liquid- and solid-state rechargeable Zn–air batteries assembled with N-GNRs/CoO as the cathode also display high peak power density and fantastic cycle stability, superior to that of benchmark Pt/C + IrO 2 catalyst. It is anticipated to offer significant benefits toward high activity, stability and mechanical flexibility bifunctional oxygen electrocatalysts for rechargeable Zn–air batteries. Graphical abstract
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高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2025
·
IF 5.5
Hui Peng,Kaifa Dong,Xin Wang,Danyang Wang,Ying Tang,Yue Li,Guofu Ma,Ziqiang Lei
Comprehensive Summary Aqueous Zn ion capacitors (AZICs) have the features of low-cost, safety, sustainability and high energy density compared to other mainstream energy storage devices. However, the inevitable dendrite growth and side reactions severely limit the cycle life. Herein, the highly polar organic molecule triethylamine (TEA) is employed as a multifunctional electrolyte additive to enhance the stability of the Zn anode. The highly electronegative tertiary amine nitrogen within the TEA molecule preferentially coordinates with Zn ions (Zn 2+ ), reorganizing the solvated sheath structure and reconfiguring the hydrogen bonding network. In addition, theoretical calculations and experimental results show that TEA can effectively mitigate the parasitic reaction triggered by water activity by spontaneously adsorbing on the Zn surface to form a self-assembled interfacial shielding layer, which inhibits the construction of micro electric field and the evolution of Zn dendrites. The Zn//Zn cell based on ZnSO 4 +TEA electrolyte achieves 3,900 h of stable cycling at 2 mA·cm –2 , a more than 19-fold improvement over the ZnSO 4 electrolyte (less than 200 h). Moreover, AZIC assembled with the ZnSO 4 +TEA electrolyte maintains 80% capacity retention and nearly 100% Coulombic efficiency after 30,000 cycles at a high current density of 4 A·g –1 .
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危险品化学品经营许可证（带存储）