NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Shuhuang Tan,Yichen Liu,Xiaoran Sun,Shoujun Zhang,Chengqi Sun,Yin Sun,Naibao Huang
Manganese dioxide, as a typical electrode material for supercapacitors, has been extensively studied. However, its actual capacity, which falls far below the theoretical value, along with sluggish kinetics and unsatisfactory stability, still necessitate the development of convenient and effective improvement strategies. Herein, an interfacial oxygen-bridge chemical bonding constrained MnO2/carbon nanotube (CNT) heterojunction has been prepared via a microwave-assisted hydrothermal process. The strong interfacial reaction induced by microwave-assistance generates abundant heterointerfaces and interfacial Mn–O–C bonds, which enhance electrical conductivity, accelerate reaction kinetics, and improve structural stability. As a result, the MnO2/CNT heterojunction exhibits enhanced electrochemical performance in terms of specific capacitance (352.6 F g−1 at 1 A g−1), rate capability (172.6 F g−1 at 20 A g−1) and cyclability (93.6% of initial capacitance retained after 5000 cycles at 10 A g−1). Moreover, the assembled MnO2/CNT//AC shows a high energy density of 29.5 W h kg−1 at a power density of 900 W kg−1 and outstanding cycling stability with 91.2% capacitance retention after 5000 cycles at 3 A g−1. This work highlights the potential of microwave-assisted interface engineering to enhance the performance of MnO2-based electrode materials for practical applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2025
·
IF 17.1
Lixin Bai,Juan Chen,Yi Zhang,Zheng Yi,Yuansen Xie,Maowen Xu,Yuruo Qi
The intrinsic sodium storage performance of hard carbons is fundamentally governed by its structure attributes, which are primarily shaped by the precursor material. Therefore, a direct manipulation of precursors at the molecular level offers considerable flexibility in engineering hard carbon architectures. This study introduces a straightforward and effective pre-carbonization approach to modulate the molecular configuration and functional groups within celluloses, employing both oxygen-bridging and air-etching to stimulate the development of closed pores during carbonization. These closed pores not only facilitate the transport of sodium ions but also serve as active sites for sodium storage, resulting in a hard carbon with an impressive specific capacity of 421.1 mA h g −1 and a substantial low-voltage plateau capacity of 312.8 mA h g −1 . Extensive research has elucidated the formation mechanism of closed pores as well as its correlation with low-voltage plateau capacity, which will greatly forward the rational design of high-performance hard carbon anodes for next-generation sodium ion batteries.
研究领域:
材料科学
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电化学
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储能技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
He Xiao,Xuemin Yang,Man Zhao,Rong Zhang,Yanying Jing,Li Zhang,Yingluo He,Haishun Wu,Jianfeng Jia
To promote kinetic rate of half reactions in water splitting, we synthesized a bifunctional PtFe/graphene with dual active sites by a facile self-designed four-electrode electrochemical method . Characterization data indicate interfacial oxygen bridge structure of Pt–O–Fe is expectedly formed and electrons transfer from Fe to Pt via this bridge structure. This unique interfacial structure not only regulates electronic structure of Pt and Fe, but also offers interfacial electron-transfer channel to improve overall conductivity, which essentially enhances intrinsic activity towards acidic HER and alkaline OER . For HER , the best Pt–Fe/G shows the mass activity of 4239.3 mA mg −1 at −0.063 V, 3.79 times higher than that of Pt/G (1118.5 mA mg −1 ) and 5.02 times higher than that of commercial Pt/C (843.1 mA mg −1 ) catalyst, respectively. Introduction of Fe to Pt decreases the energy barrier of HER process (ΔG∗), and results in conversion of rate-limiting step from H + adsorption (Volmer step) to H∗ desorption (Tafel step). For OER , the greatest PtFe/G exhibits an overpotential of lower 26 mV (10 mA cm-2) than commercial RuO 2 and its mass activity is 16.7 times higher than Fe/G. The formed Pt–O–Fe bond effectively elevates the electrophilic properties and facilitates adsorption of OH − , contributing to the change of rate-limiting step and enormous decrease of reaction activation energy (E a ). This work inspires researchers to construct efficient interfacial oxygen bridge structure to enhance electrocatalytic performance for water splitting and design novel electrochemical method for synthesis of graphene-based composites.
研究领域:
材料科学
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电化学
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能源催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2012
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IF 3.07
Qiu-Ping Li,Bing Yan
A series of ternary rare earth (Eu 3+ , Tb 3+ ) complexes are covalently coated to the 3-aminopropyltriethoxysilane functionalized multi-walled carbon nanotube (MWCNT) by a simple in situ sol–gel method by the bifunctional silylated monomer TTA-Si and TAA-Si (TTA-Si and TAA-Si are 3-(triethoxysilyl)propylisocyanate (TEPIC) modified thenoyltrifluoroacetone (TTA) and trifluoroacetylacetone (TAA), respectively). The resulting materials are characterized by Fourier transform infrared spectra, scanning electronic microscope, transmission electron microscope, thermogravimetric analysis, ultraviolet visible diffused reflection measure, photoluminescence spectra, and X-ray diffraction. The photoluminesce measurements indicated that these hybrids exhibit characteristic red and green luminescence originating from the corresponding ternary rare earth ion (Eu 3+ , Tb 3+ ). The luminescence quenching effect of MWCNT networks have been successfully restrained by coating a relatively thicker silica–oxygen-based organic–inorganic complex. Furthermore, the fluorescence lifetimes and emission quantum efficiencies of Eu 3+ hybrid materials are also determined.
研究领域:
材料科学
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光物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Wei Wen,Jianru Gao,Man Zhao,Qinyun Yan,Liwu Qiang,Shuai He,Peipei Zhao,Chunmei Liu,Jiamin Ma,Li Zhang,Junming Zhang,He Xiao,Jianfeng Jia
To enhance the kinetic rate of oxygen evolution reaction (OER) in water splitting, a composite (WO 3-x /CNT) of multivalent WO 3-x coupling with carbon nanotube (CNT) is successfully synthesized by a facile electric field-assisted synthesis method. The characterization data indicate that an oxygen bridge structure of W– O –C is formed in WO 3-x /CNT due to strong interaction between WO 3-x and carbon nanotubes. Benefitting from this unique interfacial W– O –C structure, the electronic structure of tungsten sites is regulated through electron-transfer from tungsten atoms to carbon atoms. This obtained electronic structure promotes the intrinsic activity of WO 3-x /CNT and optimizes the adsorption of active OH∗ species. Moreover, the CNT support improves the overall conductivity. The optimal WO 3-x /CNT-2h sample exhibits an overpotential of only 326 mV (without iR compensation) at 10 mA cm −2 , much lower than that of commercial RuO 2 (341 mV). With the introduction of illumination, OER activity on WO 3-x /CNT-2h is tremendously enhanced and the overpotential is reduced to 276 mV at 10 mA cm −2 . This improvement is attributed to photo-generated holes, which creates additional active sites for OER. This work not only encourages the application of novel electrosynthesis methods for designing multivalent metal-based OER electrocatalysts but also highlights the synergistic effect of photoelectricity in enhancing OER performance.
研究领域:
材料科学
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电化学
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能源转换
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2021
·Vol. 9
·期 4
·2104138
·
IF 16.806
Aya Gomaa Abdelkader Mohamed,Enbo Zhou,Zipeng Zeng,Jiafang Xie,Dunfeng Gao,Yaobing Wang
Electrochemical CO 2 reduction (ECR) is one of the promising CO 2 recycling technologies sustaining the natural carbon cycle and offering more sustainable higher-energy chemicals. Zn- and Pb-based catalysts have improved formate selectivity, but they suffer from relatively low current activities considering the competitive CO selectivity on Zn. Here, lead-doped zinc (Zn(Pb)) electrocatalyst is optimized to efficiently reduce CO 2 to formate, while CO evolution selectivity is largely controlled. Selective formate is detected with Faradaic efficiency (FE HCOOH ) of ≈95% at an outstanding partial current density of 47 mA cm –2 in a conventional H-Cell. Zn(Pb) is further investigated in an electrolyte-fed device achieving a superior conversion rate of ≈100 mA cm –2 representing a step closer to practical electrocatalysis. The in situ analysis demonstrates that the Pb incorporation plays a crucial role in CO suppression stem from the generation of the Pb–O–C–O–Zn structure rather than the CO-boosted Pb–O–C–Zn. Density functional theory (DFT) calculations reveal that the alloying effect tunes the adsorption energetics and consequently modifies the electronic structure of the system for an optimized asymmetric oxo-bridged intermediate. The alloying effect between Zn and Pb controls CO selectivity and achieves a superior activity for a selective CO 2 -to-formate reduction.
研究领域:
材料科学
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电化学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
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IF 21.1
Jiabing Geng,Yafang Luo,Jiale Song,Hongjie Yu,You Xu,Hongjing Wang,Kai Deng,Ziqiang Wang,Liang Wang
Electrocatalytic reforming of polyethylene terephthalate (PET)-derived ethylene glycol (EG) into high-value glycolic acid (GA) is a potential strategy for PET plastic upcycling, and the efficiency mainly depends on the identification of high-performance electrocatalysts. In this study, we synthesize Ga-incorporated PdCu metallene (GaO x -PdCuene) with an oxygen-bridge structure (GaO x -PdCuene) for the electrolysis of PET hydrolysate towards GA production. GaO x -PdCuene demonstrates an impressive Faradaic efficiency of 98.72 % for GA production at a potential of 0.9 V, along with stable operation for over 100 h. The experimental and theoretical analyses show that the Ga-induced oxygen-bridge structure, accompanying with p-d orbital hybridization, efficiently regulates electronic structure of Pd, which effectively facilitates *OH species generation and optimizes adsorption energies of intermediates on Pd active sites, leading to high activity and selectivity for GA generation. The work highlights the design of oxygen-bridge structure in Pd-based electrocatalysts for efficient conversion of PET wastes to high-value GA product.
研究领域:
材料化学
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环境催化
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可持续能源
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高分子化学
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电化学
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纳米材料
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绿色化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Wenxin Wang,Ruidong Yang,Qiqi Mao,Xu Mu,Hongjie Yu,Kai Deng,Jianguo Wang,Liang Wang,Hongjing Wang
The utilization of green hydrogen sources in H 2 O for alkynols electrocatalytic semihydrogenation reaction (ESHR) at ambient temperature provides a promising pathway toward the sustainable conversion of alkynols. However, it is still a great challenge to construct specific interfacial structure to adjust the electronic structure of Pd for the purpose of altering the strong adsorption of Pd with active hydrogen to enhance the production of alkenols. Here, the atomically dispersed GaO x -PdMo bimetallene nanoribbons (GaO x -PdMo BNRs) via oxygen bridging Ga atoms is designed to the surface of PdMo BNRs for 2-methyl-3-butyn-2-ol (MBY) ESHR to the synthesis of 2-methyl-3-buten-2-ol (MBE). The GaO x -PdMo BNRs achieve the excellent MBE selectivity (≈97.4%), Faraday efficiency (≈96.1%), and maintain long-term stability. Density functional theory demonstrates that the top electron-enriched Ga atoms and the bottom electron-deficient Pd atoms construct a “pyramidal” interface via the oxygen bridge. The unique surface can effectively activate H 2 O and weaken interaction between catalyst and MBE, thus promoting MBE generation. Moreover, the electron bridge effect between Ga-O-PdMo can induce p-d orbital hybridization to achieve lower the d -band center of surface Pd thus modulating the reactants adsorption. This work provides a strategy to improve ESHR performance by electron bridge effect to modulate interfacial electron distribution.
研究领域:
材料科学
·
催化化学
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理论计算
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 10
·6014-6027
·
IF 10.7
Panpan Li,Jingde Luan,Longde Jiang,Yu Zhang,Wengang Liu,Zheng Yan,Xin Ke
High pressure wet ball milling and thermal polycondensation are used to prepare W-doped O-bridge carbon nitride (WOCN) for the rapid catalytic degradation of antibiotic rifampicin (RIF). The removal of rifampicin at a concentration of 150 mg L−1 in a dark environment reached 60% within 8 minutes and 92% after 40 minutes of visible light exposure. The rapid catalytic degradation of RIF benefits from the coupling effect of dark degradation with photocatalytic degradation, including the electron replenishment theory of dark degradation and the electrophilic attack under light irradiation. In the dark degradation reaction, the abundant delocalized electrons at the tungsten-oxygen insertion surface are captured by the dissolved oxygen to produce ˙O2−, part of which directly participates in RIF degradation, whereas the other part is oxidized to 1O2 by the holes at the carbon-rich cyano group surface and then participated in RIF degradation. The electrons consumed at the reaction site are continuously replenished through the O electron bridge, allowing RIF degradation to continue. In the photocatalytic degradation reaction, photogenerated electron holes are excited using visible light, which partly participate in the degradation of RIF through the above dark reaction pathway. Meanwhile, some photogenerated holes oxidize OH− to ˙OH and degrade RIF by electrophilic attack.
研究领域:
环境科学
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材料科学
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药学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
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IF 6.216
Jingyan Zhou,Fei Wu,Zhexin Zhu,Tiefeng Xu,Wangyang Lu
Phthalocyanine has been used widely as an oxidation catalyst, e.g., in wastewater treatment. It has become important and necessary to study phthalocyanine derivatives, to understand the potential effect they may have. Despite the fact that phthalocyanine dimers are easy to generate, such complexes have been ignored as catalysts. We prepared O-bridged iron perfluorophthalocyanine dimers (FePcF 16 -O-FePcF 16 ). Ultraviolet–visible, X-ray diffractometry, X-ray photoelectron spectroscopy, density-functional theory analysis and electrospray ionization–mass spectrometry technology assisted by pyridine ligands have been used to identify the structure of FePcF 16 -O-FePcF 16. Carbamazepine selected as a model pollutant could be effectively oxidized in the system with FePcF 16 -O-FePcF 16 and H 2 O 2 . Electron paramagnetic resonance data indicated an active center that was different from OH in the Fenton reaction. Electrospray ionization–mass spectrometry detected the generation of high-valent diiron-oxo species, which implies that carbamazepine degradation was accomplished by the attack of Fe IV O Fe IV O in the FePcF 16 -O-FePcF 16 /H 2 O 2 system. Thus, we identified an O-bridge iron perfluorophthalocyanine dimer and proposed a catalytic mechanism. These results may provide a novel explanation for the oxidative mechanism.
研究领域:
环境化学
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材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Lu Cai,Li Dai,Yanhua Yuan,Anqi Liu,Li Zhanxiong
Three novel fluorinated methacrylate monomers with siloxyl bridging perfluoroalkyl groups were synthesized and characterized. Afterwards, the corresponding polymethacrylate latexes, namely monofluoroalkylsiloxyl polymethacrylate (PMFSMA), bisfluoroalkylsiloxyl polymethacrylate (PBFSMA) and trisfluoroalkylsiloxyl polymethacrylate (PTFSMA), were prepared and coated onto cotton fabrics to make them water-repellent. Particle size, particle size distribution, zeta potential and high-resolution transmission electron microscope (TEM) were tested to assess the emulsion stability and particle morphology. Thermal properties of PTFSMA were evaluated by thermal-gravimetric analysis (TGA). Surface properties of the coated cotton fabrics were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), water contact angle (WCA), adhesive force and X-ray photoelectron spectroscopy (XPS). It was found that the incorporation of more perfluoroalkyl chains and the annealing process could decrease the surface free energy of polymer film to 13.7 mN/m. Furthermore, the EDS spectra of PTFSMA film after annealing showed an enrichment of fluorine in the film-air interface.
研究领域:
材料科学
·
纺织化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Yang Chengdong,Gao Yun,Xing Zhengyu,Shu Xinxin,Zhuang Zechao,Wang Yueqing,Zheng Yijuan,Li Shuang,Cheng Chong,Wang Dingsheng,Zhang Jintao
Uncovering the dynamic structures of water at the electrode-solution interface is crucial for various electrocatalysis processes, where water acts as a proton and electron source. However, precisely controlling the state of water on complex interfaces remains challenging. Inspired by the metalloproteins in natural enzymes, we herein demonstrate that the hydrophilic sulfo-oxygen bridging between Co and Ru sites (Co s -SO-Ru) optimizes interfacial water structure via a favorable hydrogen-bond network, promoting hydrogen oxidation and evolution reactions. Mechanistic studies reveal that the stereoscopic sulfo-oxygen bridges enhance the connectivity of hydrogen-bond network to promote the proton transfer process via repelling cations from the electrode surface. Furthermore, electron donating Co sites reduce the surface oxophilicity of Ru to optimize the adsorption-desorption behaviors of hydroxyl, governing the timely refreshed Ru sites to enhance catalytic performances. Such bioinspired active sites offer a different pathway for the precise design of interfacial water structure to improve electrocatalysis.
研究领域:
电化学
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催化
·
材料科学
·
仿生工程
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物理化学
·
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）