JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Xiaoqing Huang,Wenbiao Zhang,Chaojin Zhou,Lichun Yang,Hui Wang,Qingsheng Gao,Min Zhu
Volume expansion and poor conductivity result in poor cyclability and low rate capability, which are the major challenges of transition-metal oxide as anode materials for sodium-ion batteries (SIBs). Herein, N -doped carbon encapsulated CoMoO 4 (CoMoO 4 @NC) nanorods are developed as excellent anode materials for SIBs with long-cycle life. The N -doped carbon shells serve as buffer to accommodate severe volume changes during sodiation/desodiation, and at the same time improve electronic conductivity and activate surface sites of CoMoO 4 . The optimized composite presents rapid reaction kinetics and excellent cycle stability. Even at a high current density of 1 A g −1 , it still shows long-cycle life and maintains specific capacity of 190 mAh g −1 after 3200 cycles. Furthermore, CoMoO 4 @NC anode is applied to match with Na 3 V 2 (PO 4 ) 3 cathode to assemble full-cells, in which it accomplishes reversible capacity of 152 mAh g −1 after 100 cycles, with capacity retention of 75% at a current density of 1 A g −1 , highlighting the practical application for SIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Zhuoqi Li,Peng Song,Zhongxi Yang,Qi Wang
In situ diffusion growth of CoMoO 4 nanoparticles on the surface of MoO 3 nanobelts was achieved through a facile method. The microstructures, morphologies, and chemical composition of the nanocomposites were investigated based on X-ray diffraction, field-emission electron scanning microscopy, transmission electron microscopy , energy dispersive spectroscopy, and X-ray photoelectron spectra. The characterization results confirmed CoMoO 4 nanoparticles uniformly distributed on the surface of the MoO 3 nanobelts. The trimethylamine sensing properties of pristine MoO 3 and CoMoO 4 /MoO 3 nanocomposites were investigated using a static system. The experimental results revealed that heterojunction structure of CoMoO 4 /MoO 3 nanocomposites displayed low working temperature and enhanced sensing performance. The response of CoMoO 4 /MoO 3 nanocomposites to 100 ppm trimethylamine was ∼104.8 at 220 °C, which was four times higher than that of pure MoO 3 at 280 °C. The reason for the enhanced sensing properties of CoMoO 4 /MoO 3 nanocomposites is attributed mainly to the formation of the p–n junction between the p-type CoMoO 4 nanoparticles and the n-type MoO 3 nanobelts.
研究领域:
材料科学
·
传感技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Ruijing Wang,Qunlong Wang,De Zhang,Qi Zhang,Lijuan Jiang,Youxia Liu,Qiang Wang,Xuefeng Wang
The electrolysis of water splitting is a critical technology to produce the hydrogen by green electricity. The design of highly efficient, low-cost, and stable electrocatalysts is the important point in this process. The structure modification by doping is concerned intensively because it optimizes the electronic conductivity and the absorption of reaction intermediates. The transition metal oxides are the efficient catalysts for water splitting under the alkaline electrolyte. However, the limited structure and number of surficial sites restrict the electrochemical activity. In this work, the phosphorus-doped CoMoO 4- x nanosheets on CoO nanowire (CoMoO 4-x P x /CoO) is developed as one efficient hydrogen evolution reaction (HER) electrocatalyst in alkaline media. The optimized CoMoO 4-x P x /CoO shows a small overpotential of 63 mV at 10 mA cm −2 for the HER in 1 M KOH. Combined characterization and density functional theory calculation, the active sites of CoMoO 4-x P x /CoO for HER are the surficial Co and Mo atoms that are linked by a P-OH structure.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Zhenlu Liu,Jing Xu,Caijin Xiang,Ye Liu,Lijun Ma,Linying Hu
Semiconductor materials can absorb visible light to become excellent hydrogen-producing materials. When different semiconductors are supported on each other, it can greatly promote the increase of hydrogen production rate. The article uses ZnS and CoMoO 4 to construct a new type of S-scheme heterojunction, and uses related characterization to illustrate the hydrogen production advantages and high performance reasons of the system. The experimental data of photocatalytic hydrogen production concretely proved the high catalytic performance of the composite material. The results shown that when the amount of ZnS loaded on CoMoO 4 was 5%, the adsorption of the composite catalyst and an appropriate amount of sensitizer made the hydrogen production rate reached 1233 μmol/g/h. This study used different characterizations to show the ball-and-stick structure of the composite catalyst and supplements the S-scheme heterojunction mechanism. Based on various studies, ZnS and CoMoO 4 had broad application prospects. The special electron transfer path of the S-scheme heterojunction provided theoretical model support for high-performance hydrogen production.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Jinyan Du,Xiaohui Zhong,Huichao He,Ji Huang,Minji Yang,Gaili Ke,Jun Wang,Yong Zhou,Faqin Dong,Qin Ren,Liang Bian
Manipulation of interfacial charge separation and transfer is one of the primary breakthroughs to improve the water oxidation activity and stability of BiVO4 photoanode. In the present work, a CoMoO4-coupled BiVO4 (BiVO4/CoMoO4) film was designed and prepared as the photoanode for photoelectrochemical (PEC) water oxidation. Compared with the bare BiVO4 film, obviously improved PEC water oxidation performance was observed on the BiVO4/CoMoO4 film. Specifically, a higher water oxidation photocurrent density of 3.04 mA/cm2 at 1.23 V versus RHE was achieved on the BiVO4/CoMoO4 photoanode, which is of about 220% improvement over bare BiVO4 photoanode (1.34 mA/cm2 at 1.23 V vs RHE). In addition, the BiVO4/CoMoO4 film photoanode was of better stability and faster hole-to-oxygen kinetics for water oxidation, without significant activity attenuation for 6 h of reaction at 0.65 V versus RHE. The enhanced water oxidation performance on the BiVO4/CoMoO4 film photoanode can be ascribed to the synergistic effect of the following factors: (i) thermodynamically, the photogenerated holes of BiVO4 are directionally transferred to CoMoO4 through their physical coupling interface and valance band potential matching; and (ii) kinetically, the transferred holes induce the formation of Co3+-active sites on CoMoO4 that could synergistically oxidize H2O to molecular O2 with stable activity.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Yue Zhang,Tong Wang,Sitong Feng,Jiusheng Cai,Lingchu Huang,Zuorong Huang,Fengmin Liu,Xishuang Liang,Geyu Lu
Ammonia (NH 3 ) is an important industrial raw material as well as a typical environmental pollutant. Therefore, the rapid and precise monitoring of its concentration is essential for protecting human health and ensuring the sustainable functioning of ecosystems. In this study, CoMoO 4 /CoV 2 O 6 sensing electrode materials were synthesized via the sol-gel method, and a mixed potential type NH 3 sensor based on Ce 0.8 Gd 0.2 O 1.95 was successfully developed. By adjusting the amount of CoMoO 4 , the ion transport capability at the interface between the sensing electrode material and the solid electrolyte was significantly enhanced, which in turn improved the electrochemical reaction efficiency and sensitivity of the sensor. Among the fabricated sensors, the sensor using 10 mol% CoMoO 4 /CoV 2 O 6 as the sensing material demonstrated the highest response value of -103 mV to 100 ppm NH 3 at 500°C. This sensor not only exhibits high sensitivity but also possesses rapid response and recovery characteristics, excellent repeatability, selectivity, and long-term stability. The NH 3 sensor developed in this study shows significant potential for applications in industrial process monitoring, environmental monitoring, and related fields.
研究领域:
传感器学
·
环境监测
·
材料科学
·
电化学
·
工业过程监控
·
气体传感技术
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2019
·Vol. 6
·期 17
·4645-4652
·
IF 3.975
Wei Guo,Yueli Wu,Yamei Tian,Xiaojuan Lian,Jiyang Li,Shuang Wang
Graphical Hollow but not empty :A hollow and porous NiCo 2 O 4 /CoMoO 4 hybrid is prepared through a hydrothermal method. The sample exhibits excellent specific capacitance. An assembled hybrid supercapacitor delivers a high energy density and a long-term cycling performance. Thus, the NiCo 2 O 4 /CoMoO 4 hybrid has a competitive advantage as an electrode material for high-performancesupercapacitors. The hierarchical hollow NiCo 2 O 4 /CoMoO 4 hybrid composite was directly grown on Ni foam (NF) under hydrothermal conditions at 110–140 °C for different growth times. This robust hollow structure benefits from a weakly alkaline environment provided by tetramethyl ammonium hydroxide and can provide a large surface area, low resistance, and many active sites to facilitate electrolyte ion transport and fast redox reactions. The as-prepared NiCo 2 O 4 /CoMoO 4 hybrid with synergetic effects shows improved electrochemical properties with an excellent capacitance (2080 F/g at 1 A/g) and long-term cycling reliability (70 % retention undergoing 3000 cycles at 10 A/g). An assembled hybrid supercapacitor based on the as-prepared NiCo 2 O 4 /CoMoO 4 hybrid electrode delivers a high energy density of 35.63 Wh/kg at a power density of 845 W/kg and a long-term cycling life (capacitance retention of 71.4 % over 9000 cycles). Thus, the as-prepared NiCo 2 O 4 /CoMoO 4 nanocomposite has a definite advantage for supercapacitor electrode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Qianglong Chen,Ruibin Guo,Yangyang Jiang,Li Li,Wenjing Qin,Yanchun Tan,Nijuan Liu,Zunli Mo
CoMoO 4 /NiCo 2 O 4 electrodes with a three-dimensional nano-sphere structure have been successfully prepared by a combination of hydrothermal and calcination methods. The electrode material exhibits a high specific capacitance of 1175 F g −1 at 1 A/g, excellent multiplicative performance (74.2 % capacity at 15 A/g) and good cycling stability (85.9 % specific capacitance retention after 10,000 cycles). The asymmetric supercapacitor was constructed using activated carbon (AC) as the negative electrode, showing excellent energy density (27.7 wh kg −1 ) and power density (806 W kg −1 ). It also has an extremely long operating life, maintaining a specific capacitance of 78.3 % after 5000 cycles at current densities up to 6 A/g. The results indicate that the synthesized mixed transition metal oxides CoMoO 4 /NiCo 2 O 4 are promising as composite electrode materials for high-performance asymmetric supercapacitors.
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Li Li,Zhongliao Wang,Kaixuan Kuang,Xiuzhen Zheng,Jiahui Wang,Jingbiao Ge,Sujuan Zhang,Shifu Chen
To optimize the performance of photocatalytic H 2 production, many effective methods have been developed, such as controlling morphology, designing synergetic reaction, and enhancing the utilization of photogenerated charge carriers (PCCs). In this work, an efficient CoMoO 4 /Zn 0.3 Cd 0.7 S (CMO/ZCS) photocatalyst with p-n heterojunction was constructed by incorporating Zn 0.3 Cd 0.7 S (ZCS) nanoparticles into CoMoO 4 (CMO) microflowers. Although CMO had limited activity in H 2 production under visible light irradiation, it could largely boosting the H 2 production efficiency of ZCS nanoparticles by oxidizing p-chlorobenzyl alcohol (Cl-PhCH 2 OH) in organic solvent. In the CMO/ZCS composites, the best rates of H 2 and Cl-PhCHO reached 34.28 and 35.87 mmol g −1 h −1 , respectively. The p-n heterojunction formed between CMO and ZCS may be the main enhanced reason of the excellent performance, as it could effectively improve the separation, transfer and utilization of PCCs. The design of the CMO/ZCS catalyst not only optimizes the migration and utilization of PCCs, but also provides crucial theoretical guidance and experimental insights for the development of highly efficient photocatalysts.
研究领域:
材料科学
·
能源化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2020
·
IF 5.604
T. Huang,X. Huang,C. Hu,J. Wang,H. Liu,Z. Ma,J. Zou,W. Ding
In this work, one-dimensional NiMoO 4 and CoMoO 4 nanorods are prepared and introduced into MgH 2 to improve its hydrogen storage properties. It is observed that the MgH 2 –NiMoO 4 system exhibits lower dehydrogenation temperature and faster kinetics than the MgH 2 –CoMoO 4 system and pure MgH 2 , indicating the superior promoting effect of NiMoO 4 over CoMoO 4 . Concretely, NiMoO 4 reacts with MgH 2 during the first dehydrogenation to in situ form Mg 2 Ni and Mo 0 , both of which are crucial factors for the following hydrogen cycling process. The ‘Mg 2 Ni/Mg 2 NiH 4 ’ mutual transformation upon hydrogen release/uptake is the well-known ‘hydrogen pump’ effect which boosts the hydrogen storage performance of MgH 2 . Moreover, theoretical calculations reveal the dual roles of Mo 0 played for the hydrogen storage in MgH 2 : i) it accelerates the hydrogen de/absorption of MgH 2 through weakening the Mg–H bonding; ii) it facilitates the mutual ‘Mg 2 Ni/Mg 2 NiH 4 ’ transformation as the formation energy of Mg 2 NiH 4 decreases under the influence of Mo 0 , which we call ‘facilitated hydrogen pump’ effect in this work. Ascribing to the collaborative action between Ni- and Mo- containing species, the hydrogen storage kinetics of MgH 2 has been accelerated.
研究领域:
材料科学
·
纳米材料
·
能源化学
·
固态储氢
·
金属氢化物
·
催化材料
·
理论计算
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Zhiyong Dong,Shiyu Xia,Ala’a Mhmoued Abdllh Alboull,Islam Mohamed Mostafa,Abubakar Abdussalam,Wei Zhang,Shuang Han,Guobao Xu
Transition-metal-based nanozymes show great potential for chemiluminescence (CL) detection due to their stability, excellent catalytic properties, good biocompatibility, and facile synthesis. In this study, bimetallic CoMoO4 nanorods with high peroxidase activity were synthesized using a hydrothermal method, followed by calcination treatment. The as-synthesized CoMoO4 nanorods were utilized as catalysts for CL for the first time. They enhance the CL intensity of the luminol/hydrogen peroxide system by nearly 750-fold. Furthermore, a sensitive and rapid platform for dopamine detection was established based on the quenching effect of dopamine on the CL signal of this system. The proposed CL method for dopamine exhibited a linear range of 10–500 nM and a detection limit of 1.98 nM. Moreover, dopamine in serum samples was successfully measured using a standard addition method, showing a satisfactory recovery of 97.2–104.3%. This work provides robust support for the development of efficient and sensitive platforms for CL detection.
研究领域:
分析化学
·
纳米技术
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2021
·
IF 2.262
Tian Ma,Yunhai Wu,Ningning Liu,Xiaoming Tao,Yunying Wu
In this work, iron-doped graphite carbon nitride (Fe-g-C3N4) was integrated with CoMoO4 through a simple hydrothermal route and high temperature calcination to synthesize distinctive composites, aiming to create a promising heterogeneous catalyst to active peroxymonosulfate (PMS) for the degradation of methylene blue (MB), a widely used organic dye. The characterization results, including SEM, EDX, FTIR, XRD and XPS, indicated that the crystal structure and physicochemical properties of CoMoO4-Fe-g-C3N4 have changed after modification, with rougher surface and efficient catalytic activity. The effects of several operational factors (catalyst dosage, oxidant dosage, reaction temperature and initial pH) were also extensively evaluated. Under the condition of CoMoO4-Fe-g-C3N4=0.1 g L−1, oxidant = 2.0 mM, dye = 100 mg/L, T = 25 °C, the MB in the CoMoO4-Fe-g-C3N4/PMS catalytic system can reach almost complete degradation in 90 minutes without pH adjustment. Further, stability experiment showed that the CoMoO4-Fe-g-C3N4 catalysts exhibited high stability and superior reusability, with 80% removal rate even after five concessive cycles of use. Additionally, through radical quenching experiments, it proved that SO4•− radicals were dominant and HO• radicals also worked in the MB degradation process. An underlying mechanism was proposed based on the detection of XPS results that both radical and non-radical degradation pathways existed during MB degradation process. The electron transfer from high-valence iron species (FeIV=O) to MB resulting in the degradation of MB through a non-radical mechanism. From the investigation, the CoMoO4-Fe-g-C3N4 composite was proved to have potential superiority as a promising catalyst for the degradation of refractory organic contaminant removal from water.
研究领域:
环境科学
·
催化材料
✓ 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）