ACS Applied Nano Materials
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2025
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IF 5.5
Ya’nan Zhu,Peng Liu,Mingyong Wang,Wenjing Ning,Yong Zhou,Xudong Zhao,Xiaoyang Liu
The synthesis and preparation of supercapacitor cathode materials is one of the important ways to achieve the increase of the energy density of supercapacitors. CoMoO4 is a commonly used cathode material, but its own conductivity is poor, however, carbon can make up for this shortcoming of poor conductivity. In this paper, soluble starch with high solubility and uniform dispersion was used as the carbon source, and CoMoO4/carbon flower-like nanocomposites (CCMO) containing surface flocculants were successfully synthesized by a two-step hydrothermal reaction and applied as the cathode for supercapacitors, which showed excellent electrochemical properties. In order to determine the electrochemical properties of the prepared CCMO, it was tested in a three-electrode system. The test results demonstrate that the CCMO-3 electrode prepared under the condition of a quality ratio of CoMoO4 to soluble starch of 1:1 demonstrated the best electrochemical performance, with a specific capacitance of 415F g–1. After 15000 cycles at a current density of 10 A g–1, its specific capacitance remained at 87.5% of the initial reversible capacity. The supercapacitor device (CCMO//AC ASC) prepared with CCMO-3 and activated carbon, as both positive and negative electrodes, has an energy density of 12.44 Wh kg–1 under a power density of 799.71 W kg–1. At a current density of 5 A g–1, it maintains 75% of its initial capacity after 10000 cycles. The excellent electrochemical performance of CCMO-3 shows its application potential in energy storage devices.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 13
·2215
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IF 5.719
Huijun Song,Jingjing Li,Guan Sheng,Yinling Zhang,Ahmad Azmin Mohamad,Juan Luo,Zhangnan Zhong,Wei Shao
The oxygen evolution reaction (OER) occurs at the anode in numerous electrochemical reactions and plays an important role due to the nature of proton-coupled electron transfer. However, the high voltage requirement and low stability of the OER dramatically limits the total energy converting efficiency. Recently, electrocatalysts based on multi-metal oxyhydroxides have been reported as excellent substitutes for commercial noble metal catalysts due to their outstanding OER activities. However, normal synthesis routes lead to either the encapsulation of excessively active sites or aggregation during the electrolysis. To this end, we design a novel core–shell structure integrating CoMoO4as support frameworks covered with two-dimensional γ-FeOOH nanosheets on the surface. By involving CoMoO4, the electrochemically active surface area is significantly enhanced. Additionally, Co atoms immerge into the γ-FeOOH nanosheet, tuning its electronic structure and providing additional active sites. More importantly, the catalysts exhibit excellent OER catalytic performance, reducing overpotentials to merely 243.1 mV a versus 10 mA cm−2. The current strategy contributes to advancing the frontiers of new types of OER electrocatalysts by applying a proper support as a multi-functional platform.Keywords:γ-FeOOH nanosheets;CoMoO4@γ-FeOOH heterojunction;oxygen evolution reaction
研究领域:
材料科学
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电化学
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DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMISTRY
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2024
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IF 5.5
Dongxiao Wang,Zheng Lan,Yue Li,Ying Huang,Kun Yin,Lixia Yang,Liangjiu Bai,Donglei Wei,Huawei Yang,Hou Chen,Mingchuan Luo
Comprehensive Summary Photocatalytic aerobic oxidative desulfurization (PAODS) is a sustainable alternative technology to traditional, energy-intensive fuel desulfurization methods. Nonetheless, its advancement is hindered by the notable challenge of inadequate electron-hole separation efficiency within the existing catalytic systems. Herein, a Janus 2D/2D heterostructure composed of Co 3 O 4 and CoMoO 4 is reported for the PAODS of thiophenic sulfides. Through a combination of detailed experimental characterizations and density functional theory (DFT) calculations, we elucidate the formation of a type II p-n heterojunction in the catalyst, significantly enhancing electron-hole separation through electric field force and reducing the possibility of electron-hole recombination due to the spatial separation of redox centres. The photocatalyst exhibits exceptional activity and demonstrates an impressive performance of 10.4 mmol·g –1 ·h –1 in the oxidation of dibenzothiophene (DBT). Moreover, the photocatalyst demonstrates profound desulfurization capabilities in real diesel, reinforcing its promising prospects for industrial application. These discoveries provide invaluable insights, both scientifically and practically, towards the development of advanced photocatalysts for PAODS processes.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Chenxuan Xie,Mingzhe Li,Ziyu Ling,Xiaofen Wang,Yuzhen Lv,Kepi Chen
Highly efficient and stable electrocatalysts toward hydrogen evolution reaction (HER) under large current density are essential for alkaline water splitting. Herein, an active and durable CoMoO 4 -based HER electrocatalyst is developed, with a coupling of surface phosphorization and polypyrrole (PPy) modification to accelerate water dissociation and prevent alkaline corrosion during HER process, ensuring great catalyst stability. The prepared PPy-CoMoO 4 /P@NF catalyst achieves perfect HER activity with only 242.1 mV overpotential at the industrial current density of 1000 mA·cm −2 in 1.0 M KOH as well as a low Tafel slope of 39.0 mV dec −1 . Moreover, PPy modification greatly inhibits the alkaline corrosion and the catalyst exhibits stable operation for 100 h at 1000 mA·cm −2 with a conservation rate of 98.5 %. Electrochemical tests and theoretical calculations reveal that the multiple interfaces formed by CoMoO 4 /CoP/PPy significantly reduce the energy barrier of hydrolysis and improve the interfacial adsorption of H ads . Meanwhile, the surface phosphating changes the Gibbs free energy of rate-determining step (RDS) from −0.54 to −0.29 eV, optimizing the energy barriers for hydrogen adsorption-desorption. Remarkably, an electrolyzer with PPy-CoMoO 4 /P @NF as cathode catalyst only needs a cell voltage of 1.92 V at 1000 mA cm −2 for overall water splitting. This study provides an effective way to develop highly efficient and stable HER catalysts toward industrial water splitting.
研究领域:
材料科学
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电化学
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DOI
高影响因子
ACS Applied Nano Materials
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2023
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IF 5.9
Xiaoqing Wang,Chengjiang Qian,Wenjie Pan
Extended utilization of polypropylene (PP) is compromised by its high flammability. Owing to the merits of easy preparation and abundance in raw materials, graphitic-like carbon nitride (g-C3N4, denoted as CN) is favored as flame retardant for PP. Nevertheless, it is hard to acquire the satisfying flame retardancy efficiency when CN dosage is low. Here, the interfacial assembly strategy is utilized to obtain the micro–nano structure of phosphorus-doped CN/CoMoO4 (PCN–Co) as flame retardant for PP. When using 2.0 wt % PCN–Co, the decomposition temperatures are markedly enhanced, confirming the delayed thermal degradation. Peak heat release rate and total heat release values are impaired by 33.6 and 12.0%, implying the inhibited release of heat. Peak smoke production rate and total smoke production values are dampened by 45.1 and 34.9%, signifying hindered emission of smoke. In short, this work provides inspiration for the design of CN-based nanostructures, mining their potentials in polymer composite fields.
研究领域:
材料科学
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聚合物工程
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2021
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IF 3.498
Ruibin Liang,Yongquan Du,Junxi Wu,Xintong Li,Tongxin Liang,Jian Yuan,Peng Xiao,Jianwen Chen
In this work, g-C 3 N 4 @NiMoO 4 /CoMoO 4 (gCN@NCM) was fabricated by a hydrothermal method . g-C 3 N 4 sheets were embedded in staggered NiMoO 4 /CoMoO 4 rods to form a three-dimensional structure. The prepared gCN@NCM exhibited good electrochemical performance of high specific capacitance (641.5 F/g) and excellent cycle stability (15.79% of capacitance lost after 8000 cycles). The specific capacitance of the gCN@NCM//active carbon (AC) device got 30% enhanced at the first 2000 cycles. Moreover, 110% of the original specific capacitance was still maintained after 10,000 cycles. These results indicate that the g-C 3 N 4 @NiMoO 4 /CoMoO 4 has great potential in supercapacitors .
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
MOLECULES
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2024
·Vol. 29
·期 6
·1369
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IF 4.2
Rui Yu,Xiaoyan Lu,Zhenjiang Lu,Yali Cao
The development of electrode materials with excellent performance serves as the key for researchers to enhance the energy density of supercapacitors. Cobalt molybdate (CoMoO4) nanomaterials have been regarded as one of the most prospective electrode materials for supercapacitors due to their high theoretical capacitance and excellent electrical conductivity. In this paper, three kinds of CoMoO4nanorods were prepared directly via simple and environmentally friendly solid-phase chemical reactions with solid inorganic salts as raw materials. According to X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) test results, different reagents had certain effects on the size and morphology of CoMoO4, and these affected its electrochemical performance. In particular, the samples prepared with Co(NO3)2·6H2O as raw material took on a more uniform micromorphology, with a better crystallinity. Simultaneously, electrochemical test results showed that the samples synthesized with Co(NO3)2·6H2O presented relatively good electrical conductivity and a large specific capacitance (177 F g−1). This may be due to the nitrates reacting more slowly during the reaction and the crystals having difficulty aggregating during growth. Therefore, the structure of the prepared CoMoO4nanomaterial was more uniform, and it was resistant to collapse during the charging and discharging process; thus, the capacitor presents the best performance.
研究领域:
材料科学
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电化学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Hanwei Zhao,Bowen Zhang,Enze Fan,Zhuanfang Zhang,Guohua Dong,Wenzhi Zhang,Liming Bai,Ming Zhao,Dong-Feng Chai,Xiaoming Huang
CoMoO 4 is a promising oxygen evolution reaction (OER) catalyst owing to its distinct crystallographic configuration and redox versatility. However, its practical applications remain limited by its suboptimal active site density and inefficient charge-transport mechanisms. To address these challenges, a one-step hydrothermal method is developed to introduce Al atoms into the CoMoO 4 framework, yielding an Al-doped electrocatalyst (Al–CoMoO 4 -1/NF) featuring enhanced functionality. Al–CoMoO 4 -1/NF achieves an OER current density of 10 mA cm −2 at an overpotential of 184 mV, demonstrating a Tafel slope of 55.6 mV dec −1 . In full water-splitting configurations, the Al–CoMoO 4 -1/NF(+)||Pt/C/NF(−) electrolyzer attains 10 mA cm −2 at 1.52 V, outperforming various nonprecious-metal-based systems. Al integration regulates ∗OH intermediate adsorption equilibrium and strengthens interactions with oxygenated species. Al incorporation considerably reduces charge-transfer resistance and accelerates reaction kinetics. The larger specific surface area of the Al-doped structure exposes more active sites and increases the electrode/electrolyte interfacial contact area, improving catalytic activity. These synergistic effects enhance intrinsic activity and mass-transport efficiency. Leveraging abundant Al for structural modulation, this study advances the rational design of high-performance, cost-efficient OER catalysts for sustainable energy conversion.
研究领域:
材料科学
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电化学
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能源转换
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Ziyu Li,Jiqiao Zhang,Mei Li,Meijuan Ding,Zhenkun Liu,Zhiliang Jin
Cost-effective bimetallic oxide catalysts are gradually replacing noble metal catalysts for photocatalytic hydrogen production . This study used a two-step method to synthesize CoMoO 4 with a rod-shaped structurea. CuBr is a catalytic base synthesis graphdiyne material. The graphdiyne that serves to anchor CoMoO 4 rods through a solvent-thermal synthesis method, thereby enhancing the photocatalytic performance of the resultant composite catalyst. The results show that the 5 h hydrogen evolution capacity of the optimized CoMoO 4 /graphdiyne composite catalyst is 187.47 μmol, which is 2.9 times higher than that of CoMoO 4 monomer and 41.7 times higher than that of graphdiyne monomer. The addition of graphdiyne provides a larger comparison area for CoMoO 4 , giving composite catalyst more active sites, and enhancing the optical hydrogenation effect of catalysts. Through the Mott-Schottky test, the UV–visible diffuse reflectance test and band gap calculation can be speculated that the CoMoO 4 and graphdiyne construct the type II heterojunction which promotes the rapid transfer of photogonic carriers. This work provides a good prospect and opportunity for studying graphdiyne in the application of graphdiyne in the application of dualmetal oxides.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2025
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IF 3.5
Zhao Rongxiang,Wang Hongli,Li Xiuping
The introduction of oxygen vacancies on the surface of catalysts is an important way to improve the performance of catalysis for oxidative desulfurization. In this study, Ni-doped CoMoO 4 catalysts with a significant number of oxygen vacancies were synthesized using hydrothermal methods. The structure of the catalysts was characterized through scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), N 2 adsorption–desorption techniques, and UV–visible diffuse reflectance (UV–Vis DRS). Compared to CoMoO 4 , the specific surface area of Ni-CoMoO 4 decreased, but the performance of catalysis is improved due to the increased number of oxygen vacancies. The oxidative desulfurization experiments showed that catalytic activity was significantly enhanced by Ni doping. The optimum reaction conditions were determined to be a Ni/Co molar ratio of 1:20, a reaction temperature of 110 °C, a catalyst dose of 0.05 g, and an oxygen flow rate of 150 mL/min. The desulfurization rate of dibenzothiophene (DBT) in model oil could be as high as 96% under the optimum reaction conditions. The desulfurization mechanism of the catalyst was investigated by free radical-trapped experiments. This study proposes a novel strategy for oxidative desulfurization using metal-doped compounds with abundant oxygen vacancies as catalysts. Graphical abstract An inorganic material Ni-CoMoO 4 with a number of oxygen vacancies was synthesized by hydrothermal method and applied for removal of sulfur-containing compounds. It is necessary for ecological and environmental demands. This work provides a new idea for oxidative desulfurization using metal-doping compound containing a number of oxygen vacancies as catalysts.
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DOI
高影响因子
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
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2024
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IF 2.9
Zijie Su,Zhihua Zhao,Guixin Jin,Wei Chen,Xiaoqing Shen,Lan Wu
The focus of this work is to develop a sensitive and reliable acetone gas sensor using the Pt-modified Co 3 O 4 /CoMoO 4 heterojunction derived from metal-organic frameworks (MOFs). Pt-loaded Co 3 O 4 /CoMoO 4 heterojunction was successfully prepared by the surface redox method, and the composites exhibited high sensitivity and selectivity for acetone with a low detection limit. By modifying the Co 3 O 4 /CoMoO 4 material with platinum loading, the sensor achieved a response of 24.12 to 20 ppm acetone, which was significantly better than that of the pure Co 3 O 4 /CoMoO 4 heterojunction. This work not only improves acetone detection strategies, but also enhances the potential for industrial and medical VOC monitoring applications.
研究领域:
材料科学
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传感技术
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医学检测
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DOI
高影响因子
ACS Applied Nano Materials
·
2023
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IF 5.9
Changkun Qiu,Hao Zhang,Qingrun Li,Yongxian Guo,Yifan Song,Fei An,Liang Zhu,Anshan Xiao,Chunxiao Lv,Dongzhi Zhang
The interface between two distinct materials in a heterojunction material plays a crucial role in gas sensors, as it facilitates the swift and effective transfer of charge carriers, resulting in enhanced response times. Nevertheless, the impact of heterogeneous interfaces on gas-sensing properties remains uncertain, impeding the advancement of semiconducting hybrids in gas-sensing applications. This study presents the synthesis of a PANI/CoMoO4 p–p heterogeneous nanocomposite through in situ polymerization of highly active PANI onto CoMoO4. In the range of 0.05–50 ppm NH3, PANI/CoMoO4 exhibits a rapid response time of ∼5 s (50 ppm) and a low LOD of 50 ppb. PANI/CoMoO4 has only 10% decrease in response to NH3 during 40 days and demonstrates a high selectivity to NH3 against H2S, CO, CH4, and other interferents. The effective modification of PANI, as confirmed by density functional theory (DFT), enhances the adsorption efficiency of NH3 molecules. Additionally, the p–p heterojunction interface between PANI and CoMoO4 facilitates efficient electron transport. The findings of this study highlight the advantages of p–p heterojunctions in NH3 detection, offering novel insights for the design and synthesis of high-performance gas-sensitive materials. Furthermore, effective utilization of the PANI/CoMoO4 nanocomposite in portable gas sensors and inspection robots underscores their practicality.
研究领域:
材料科学
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化学
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DOI
高影响因子
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