Analytical Methods
·
2024
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IF 2.7
Peng Zhao,Xuhui Xia,Yiyao Luo,Zirui Yuan,Jiaxi Deng,Huibo Luo,Xiaogang Luo,Danqun Huo,Changjun Hou
The rapid classification of crude baijiu is pivotal for its industrialization and automated development. In this study, a colorimetric sensor array employing peroxidase nanase (Por-CoMoO4) was developed to detect reducing substances and crude baijiu. The peroxidase-like activity of CoMoO4 was significantly enhanced by porphyrin (Por), exhibiting a Km value of 0.044 mM and Vmax of 19.37 × 10−8 for TMB substrate. Peroxidase activity varies at different pH levels. Organic and crude baijiu scavenge free radicals, thereby inhibiting oxTMB formation and yielding distinctive fingerprint profiles. Using linear discriminant analysis, 14 types of small molecules and 16 varieties of Luzhou-flavor crude baijiu were identified within specific concentration ranges. The method achieved 100% accuracy in distinguishing baijiu samples sourced from different distilleries, offering a straightforward, rapid, and effective approach to differentiate crude baijiu during alcoholic beverage production.
研究领域:
生物化学
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食品科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jingxian Zhang,Qiuyue Chen,Guoguo Wang,Xuguang An,Jing Zhang,Qian Liu,Lisi Xie,Xiaolei Li,Weitang Yao,Qingquan Kong
Electrocatalytic reduction is a promising method to remove NO 2 − ; not only can it deal with environmental issues, but it can also recycle NO 2 − to form NH 3 . This study involved the preparation of oxygen vacancies-rich monoclinic cobalt molybdate nanosheets on nickel foam (CoMoO 4 /NF) employing a hybrid approach of hydrothermal and calcination reduction techniques renders highly effective catalysts for electroreduction of nitrite (NO 2 − RR). The presence of oxygen vacancies increases carrier density, enhancing electrical conductivity, reducing resistance, and accelerating electron transfer. Additionally, it serves as an active site for absorbing NO 2 − . In an aqueous solution containing 0.5 M Na 2 SO 4 and 0.1 M NO 2 − , the Faraday efficiency (FE) of CoMoO 4 /NF reaches an impressive 98.6 ± 0.02 % at −0.8 V vs. RHE, and NH 3 yield demonstrates a commendable performance, attaining 32.72 ± 0.17 mg h −1 cm −2 . Meanwhile, it exhibits robust and enduring characteristics throughout the stability tests. Employing CoMoO 4 /NF as the cathode, the Zn−NO 2 − battery demonstrates a peak power density of 5.94 mW cm −2 alongside an NH 3 yield of 3.88 mg h −1 cm −2 and an FE of 91.88 %. Furthermore, density functional theory calculations uncover the significant influence of oxygen vacancies on enhancing nitrite adsorption and activation over the CoMoO 4 surface and bring to light possible reaction pathways.
研究领域:
环境科学
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材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
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IF 4.939
Yiyi Liu,Peiman Xu,Zhifeng Ye,Tianlun Cen,Xiaomin Peng,Dingsheng Yuan,Haiyan Wu
Transition metal oxides , as newly earth-abundant and low-cost catalysts, have been regarded as promising materials for electrocatalytic oxygen evolution. However, they are rarely used as an electrocatalyst in hydrogen evolution reaction (HER) due to the poor HER activity. Herein, we present a facile two-step method to synthesize P doped CoMoO 4 /RGO (P-CoMoO 4 /RGO) with different atomic ratios of Co 2+ /Co 3+ through a simple phosphorization strategy by changing the mass of NaH 2 PO 2 . The effective P-doping into CoMoO 4 /RGO can modify the electronic properties and modulate the atomic ratio of Co 2+ /Co 3+ , which promotes the electron transfer and creates more activity sites. Therefore, the optimized P-CoMoO 4 /RGO with a relatively larger atomic ratio of Co 2+ /Co 3+ shows superior HER performances in alkaline media , which affords a current density of 10 mA cm −2 at a small overpotential of 90 mV and a low Tafel slope of 62 mV dec −1 along with having satisfactory long-term stability. This work provides a valuable route to enhance the HER activity of transition metal oxides.
研究领域:
材料科学
·
电催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Fan Li,Zongyu Huang,Rong Hu,Wei Chen,Yundan Liu,Xiang Qi
In this paper, a worm-like CoMoO₄/expanded graphite (EG) composites materials prepared by hydrothermal method is presented. The composite material combines the high capacitance properties of the bimetallic oxide CoMoO₄ with the excellent electrical conductivity and high specific surface area of EG, realizing a significant enhancement of electrochemical properties. The results show that the specific capacitance of the CoMoO₄/EG composite is 1359 F/g at 1 A/g current density, which is far more than that of the pure CoMoO 4 (549 F/g) and EG (422 F/g). The improvement of the capacitive performance is mainly attributed to the conductive network constructed by EG to effectively accelerate the electron transport. Moreover, its high specific surface area provides abundant electrochemical reaction sites, forming a strong synergistic effect with CoMoO 4 . Further, the asymmetric supercapacitor based on this composite material achieved a high energy density of 69.96 Wh/kg at a power density of 750 W/kg, highlighting its excellent energy storage performance. This study opens up a new way for the design of capacitor electrode materials and further verifies the great advantages of the composite strategy of bimetallic oxides and carbon-based materials in enhancing the electrochemical performance. It is significant to promote the development and application of high-performance capacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yixian Zang,Xiaorong Cai,Shaohong Zang,Lili Ji,Feng Lin,Tong Wang,Xue Dang,Senyang Yu,Shaozheng Zhang,Liuye Mo
Photocatalytic water splitting is one of the effective ways to solve environmental problems and energy crisis. However, the sloughy kinetics of 4e - transfer in water oxidation reaction (WOR) severely limits the efficiency of overall water splitting. Herein, S-scheme heterojunction is constructed by decorating cobalt molybdate on polymeric carbon nitride (CoMoO 4 /PCN) to accelerate the carrier kinetics in WOR. The CoMoO 4 /PCN heterojunction is characterized by XRD, TEM, SEM, XPS and electrochemical tests. Experimental analysis and theoretical calculations reveal that S-scheme heterojunction increases the charge transfer kinetics and the photo-redox ability. Moreover, the decreased Gibbs free energies of intermediate species scale down the overpotential of WOR. Therefore, 2 wt% CoMoO 4 /PCN exhibits outstanding O 2 evolution rate of 34.6 (λ > 300 nm) and 6.2 μmol h −1 (λ > 420 nm), which are 10.8 and 3.6 times than PCN, respectively. This study reveals the key characteristics of PCN by using charge conducting materials to regulate carrier dynamics, which will lay a foundation for the development of photocatalytic O 2 reaction.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2021
·
IF 6.583
Tao Wang,Weibing Ma,Yuxin Zhang,Jingdong Guo,Tingting Li,Shenghui Wang,De’an Yang
The core-shell CoMoO 4 nanorods@Ni 3 S 2 nanosheets (CMO@NS) for supercapacitor were prepared by a facile two-step hydrothermal process accompanying with annealing treatment. The influence of hydrothermal time on structures and electrochemical properties was studied in detail. Benefiting from the synergism-enhanced action of CoMoO 4 and Ni 3 S 2 and the novel core-shell heterostructure of the composite, the prepared electrode exhibits excellent electrochemical performance. CMO@NS employed as positive electrode for supercapacitor exhibits excellent areal specific capacitance (11.02 F cm −2 at 5 mA cm −2 ), exceptional rate performance (70.8% retention, even increasing the current density to 30 mA cm −2 ) and enhanced cycle performance (57.7% retention rate after 3000 cycles). Furthermore, an asymmetric supercapacitor device was fabricated, which achieves an ultra-high energy density of 0.412 mWh cm −2 at the power density of 4 mW cm −2 and a great cycle life with 81.25% capacitance retention over 3000 cycles. Thus, the core-shell CMO@NS could be a hopeful candidate for practical supercapacitor electrode materials.
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
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Junzhen Guo,Liang Chu,Liyan Wang,Huiyang Liu,Mu Yang,Ge Wang
The oxidative desulfurization (ODS) is a promising industrial technology of environmental protection, and developing effective catalysts for aerobic oxidation desulfurization (AODS) has attracted much attention. In this work, composite CoMoO 4 -Co 3 O 4 hollow nanocages (CoMoO HNCs) are synthesized using a novel self-template strategy with ZIF-67 as the sacrificial template, and they show a superior ODS performance to eliminate the dibenzothiophene (DBT) completely at 110 °C in 1 h, O 2 in air as the oxidant. The outstanding ODS activity is the outcome of large specific surface area (221.3 m 2 g −1 ), high dispersed molybdenum active centers, causing more Mo to react with DBT in oil. The ODS mechanism of Mo-peroxo species based on O 2 is proposed. Additionally, CoMoO HNCs catalysts can be easily separated by centrifuged and show excellent recycled stability. This work provides a valuable method for designing cost-effective Mo-based bimetal oxides catalysts with outstanding ODS performance for industrial applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jiabing Luo,Xingzhao Wang,Yufeng Gu,Dong Wang,Shutao Wang,Wenle Li,Yan Zhou,Jun Zhang
Hollow nanocages composed of heterostructures play an important role in oxygen evolution reaction (OER) due to their high electrocatalytic activity induced by the interfacial polarization within the interface of the heterostructure. In this work, ZIF-67 was used to synthesize Co 3 O 4 /CoMoO 4 hollow nanocages (Co 3 O 4 /CoMoO 4 HNC). Transmission electron microscopy (TEM) images verify that Co 3 O 4 /CoMoO 4 HNC was composed of Co 3 O 4 /CoMoO 4 heterostructures. X-ray photoelectron spectroscopic (XPS) characterizations show that the Mo 3d peaks of Co 3 O 4 /CoMoO 4 are located at lower binding energy compared with CoMoO 4 , indicating charge transfer between Co 3 O 4 and CoMoO 4 . The electrochemical studies show that Co 3 O 4 /CoMoO 4 HNC exhibited excellent OER activity in an alkaline medium with only 248 mV overpotential required to achieve a current density of 10 mA cm −2 . Co 3 O 4 /CoMoO 4 HNC was tested as the anode material in a homemade water-splitting device to produce oxygen. The Co 3 O 4 /CoMoO 4 HNC‖20 % Pt/C electrolytic cell shows equivalent performance to RuO 2 ‖20 % Pt/C cell at 50 °C. The excellent OER performance of Co 3 O 4 /CoMoO 4 HNC is attributed to the interfacial charge transfer between Co 3 O 4 and CoMoO 4 which promote the adsorption of OH − . Besides, the hollow nanocage structures provide a large surface area, leading to more active sites for OER.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Linlin Fan,Yimin Wang,Xin Guo,Zhiliang Jin
Photocatalytic hydrogen production technology has great challenges in designing and synthesizing stable photocatalyst and inhibiting high recombination rate of carriers. In this paper, CoMoO 4 /GDY type-II heterojunctions were successfully constructed by coupling a new two-dimensional layered carbon material graphdiyne (GDY) with molybdate (CoMoO 4 ), and the positive effect of GDY on photocatalytic hydrogen production system was studied. The introduction of GDY provides a large number of reaction sites for the reaction. Moreover, due to the strong light absorption and excellent electrical conductivity of GDY, the photoelectrochemical properties of molybdate (CoMoO 4 ) are enhanced. The construction of type-II heterojunctions effectively promotes the spatial separation of photogenerated electrons and holes. The electron transfer mechanism of the photocatalyst was verified based on DFT and in-situ irradiation X-ray photoelectron spectroscopy. The experimental results show that the photocatalytic performance of CoMoO 4 /GDY photocatalyst is the best (121 μmol), which is 2 times and 45 times that of CoMoO 4 and GDY, respectively. This study provides a unique idea for the application of GDY in the field of photocatalysis.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Xinjia Zhang,Jingmin Ma,Jian Hao,Tenghao Ma,Jing Wang,Shimiao Peng
In this study, La–Fe2(MoO4)3@CoMoO4 composite core–shell structured electrode materials were successfully prepared by the hydrothermal method. The research results show that the introduction of lanthanum not only enhances the conductivity and charge transfer rate of Fe2(MoO4)3@CoMoO4, but also improves the electrolyte permeability and ion transport capacity by introducing oxygen vacancies and lattice defects. In addition, the core–shell structure of nanorods combined with nanosheets increases the specific surface area of the material, enhances the structural stability of the material, provides more transmission channels for ions, and improves the electrochemical reaction rate and cycle stability of the material. In the three-electrode test system, the specific capacitance of La–Fe2(MoO4)3@CoMoO4 nanomaterials only slightly decreased from 1985 F g−1 to 1963 F g−1 after 10 000 charge–discharge cycles at a current density of 5 A g−1, with a capacitance retention rate of 98.8%, demonstrating excellent cycle life. Moreover, the composite material of molybdenum dioxide (MoO2) and carbon nanotubes (CNTs) combines the excellent conductivity and ion diffusion performance of both, providing strong support for efficient energy storage. The asymmetric supercapacitor composed of La–Fe2(MoO4)3@CoMoO4 and CNTs/MnO2 anode exhibits excellent comprehensive performance, with an energy density as high as 50.2 Wh kg−1 and a power density reaching 12 000 W kg−1, providing an effective strategy for the design and development of high-performance supercapacitors.
研究领域:
材料科学
·
电化学
·
能量存储
·
纳米材料
·
超级电容器
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Yi-Fei Di,Nan Bu,Jia Li,Jun Xiang,Xin Kang,Dong-Mei Ma,Yi-Bo Wang,Rong-Da Zhao,Fu-Fa Wu
The CoMoO 4 /NiCo 2 Se 4 nanocomposite, synthesized via hydrothermal and vapor deposition methods, demonstrates exceptional multifunctional performance for energy storage and electrocatalysis. As a supercapacitor electrode, it achieves a high specific capacitance of 6445.7 mF/cm 2 at 1 mA/cm 2 and retains 71.4 % capacitance after 5000 cycles, with an energy density of 753.9 μWh/cm 2 at a power density of 75.7 μW/cm 2 , attributed to the synergistic effects between the CoMoO 4 and the conductive NiCo 2 Se 4 . Furthermore, the material exhibits outstanding bifunctional catalytic activity for alkaline water splitting, delivering low overpotentials of 270.6 mV (oxygen evolution reaction) and 177.3 mV (hydrogen evolution reaction) at 50 and 10 mA/cm 2 , respectively, with Tafel slopes of 131.4 and 131.0 mV/dec. The cell voltage of overall water-splitting is 1.46 V (10 mA/cm 2 ) and a high stability performance for 14 h. The CoMoO 4 /NiCo 2 Se 4 not only ensures efficient ion/electron transport but also creates interfacial electronic modulation through heterointerfaces, while the hierarchical nanostructure facilitates electrolyte penetration, collectively advancing energy storage capability, catalytic kinetics, and overall conversion efficiency, thereby underscoring its dual-functional superiority.
研究领域:
材料科学
·
电化学
·
能源存储
·
催化化学
·
纳米科技
·
功能材料
·
电化学能量转换
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yibo Xu,Long Cao,Hele Hua,Rui Li,Yunfang Wang,Jianxin Liu,Yawen Wang,Caimei Fan
Electrocatalytic nitrate reduction, as an emerging sustainable process for ammonia production, has garnered significant attention in recent years. In this study, mixed metal oxides CoMoO 4 microspheres was obtained by adding Mo 5+ to the preparation process of Co 3 O 4 . The obtained CoMoO 4 can effectively convert NO 3 – to NH 3 in neutral electrolytes (with a yield of up to 1481.49 μg h −1 mg -1 cat and a Faraday efficiency (FE) of 91.17 %), much better than Co 3 O 4 (with a yield of 785.56 μg h −1 mg -1 cat and a FE of 81.3 %). Subsequent characterization showed that compared to Co 3 O 4 , owing to the introduction of Mo, CoMoO 4 could increase production as well as consumption of *H, and showed enhanced adsorption capacity for reactants and intermediates. More interestingly, multiple characterizations and theoretical computations confirm that after adsorption key *NO intermediates on each catalyst, the change in electron aggregation position led to a different subsequent reaction pathway from *NO→*NOH→*N of Co 3 O 4 to *NO→*NHO of CoMoO 4 , the latter exhibits a lower reaction energy barrier, better facilitating the hydrogenation of *NO and ultimately improving NH 3 yield and selectivity.
研究领域:
材料科学
·
电化学
·
催化反应
✓ 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）