APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Linyun Zhang,Yijing Sun,Shanxin Li,Xuzhou Jiang,Hongying Yu
M−Mo−N (M = Co, Ni) bimetallic nitrides, known for their distinctive mechanical, magnetic and electrical properties, hold significant potential as microwave absorption (MA) materials. However, it remains challenge to obtain high-performance microwave absorbers from these bimetallic nitrides. In this work, the rod-like MoO 2 /Co 2 Mo 3 N/Co 3 Mo 3 N/Ni 3 Mo 3 N (MoCoNi) composites consisting of connected nanoparticles are fabricated in situ. The plentiful interfaces between the connected nanoparticles and between the different components effectively enhance the interfacial polarization, the rod-like structure benefits to conduction loss, and crystal defects facilitate strong dipole polarization. Therefore, MoCoNi composites achieve outstanding absorption properties with the reflection loss of −55.69 dB at 8.08 GHz and the effective absorption bandwidth of 6.48 GHz (11.36–17.84 GHz) at 2.4 mm. The actual MA performance of MoCoNi composites is verified through radar cross section simulation. This study proposes a novel approach for the utilizing of M−Mo−N (M = Co, Ni) bimetallic nitrides in microwave absorptions.
研究领域:
材料科学
·
电磁学
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产品关联
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Ruonan Li,Runlin Ma,Li-Li Zhang,Wei Ma,Gonglei Shao,Xu Zhang,Yun Tian,Menggai Jiao,Zhen Zhou
To tackle the challenge in electrochemical nitrogen fixing and reduction in aqueous electrolytes, the conventional approach has been to suppress the competitive hydrogen evolution reaction. Nonetheless, proton provision is a crucial step in the nitrogen reduction pathway to produce ammonia, and a single active site faces the daunting task in striking a balance between high nitrogen fixation efficiency and fast protonation kinetics. This work presents a harmonic strategy featuring atomically dispersed dual Fe–Mo sites anchored in an N-doped carbon (FeMoNC) substrate, where a low-spin Fe center with enriched empty d orbitals aids in nitrogen fixation and activation, and the adjacent Mo site accelerates the protonation kinetics of N-containing intermediates at the Fe site via a distal associative mechanism. Driven by this co-catalytic mechanism, the FeMoNC catalyst achieves a Faradaic efficiency of 37.42%, marking a significant improvement of 7.8- and 10.6-fold over Fe or Mo single-atom catalysts, respectively. Furthermore, an excellent NH3 yield of 54.40 μg h–1 mgcat.–1 is realized in a flow cell by enhancing mass transfer. This study provides valuable insights into diatomic co-catalytic mechanisms for electrochemical ammonia synthesis.
研究领域:
材料科学
·
催化化学
·
电化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Zheng-Xue Wu,Le-Qing Fan,Jiao-Juan Chen,Xu-Geng Deng,Tao Tang,Yun-Fang Huang,Ji-Huai Wu
Ternary metal sulfides employed in supercapacitors exhibit better electrochemical performances than their counterpart oxides due to their superior conductivity. However, the insertion/extraction of electrolyte ions can lead to a significant volume change in electrode materials , which can result in poor cycling stability. Herein, novel amorphous Co-Mo-S nanospheres were fabricated through a facile room-temperature vulcanization method. It involves the conversion of crystalline CoMoO 4 by reacting it with Na 2 S at room temperature . In addition to the conversion of the crystalline state into an amorphous structure with more grain boundaries, which is beneficial for the transport of electron/ion and can accommodate the volume change generated by the insertion/extraction of electrolyte ions, the production of more pores led to an increased specific surface area. The electrochemical results indicate that the as-prepared amorphous Co-Mo-S nanospheres had a specific capacitance of up to 2049.7F/g@1 A/g together with good rate capability. The amorphous Co-Mo-S nanospheres can be used as the cathode of supercapacitors and assembled with an activated carbon anode into an asymmetric supercapacitor possessing a satisfactory energy density of 47.6 Wh kg −1 @1012.9 W kg −1 . One of the prominent features exhibited by this asymmetric device is its remarkable cyclic stability, with a capacitance retention of 107% after 10,000 cycles.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
AICHE JOURNAL
·
2022
·Vol. 68
·期 11
·e17831
·
IF 4.167
Chong Peng,Peng Liu,Zhiming Zhou,Xiangchen Fang,Yun-Xiang Pan
Phenanthrene hydrogenation is a key reaction for improving the quality of gasoline and diesel. Herein, we conduct detailed thermodynamic and kinetic analyses for phenanthrene hydrogenation on a Ni-Mo/HY catalyst. We establish a comprehensive reaction network for phenanthrene hydrogenation, and calculate equilibrium constant, rate constant, adsorption constant, activation energy barrier, and reaction energy for each step in the reaction network. All of the steps in the reaction network are revealed to be exothermic. A kinetic model with 28 parameters is constructed for phenanthrene hydrogenation. The deviation of the product yields calculated by the kinetic model from those obtained in experiments is less than 4.5%, indicating the reasonability and accuracy of the kinetic model. The most favorable pathway for phenanthrene hydrogenation is demonstrated to be phenanthrene → tetrahydrophenanthrene → sym-octahydrophenanthrene → 5,6-butyl-tetrahydronaphthalene → tetralin. These results are helpful for efficiently tuning catalyst properties and optimizing reaction conditions for enhancing phenanthrene hydrogenation.
研究领域:
化学工程
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催化科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wenxue Zhao,Aihua Yan,Zigao Su,Fei Huang,Jixu Zhang,Ye Gao,Huaqi Yuan,Bolei Hui,Heng Wang
ZnIn 2 S 4 is a promising and typical semiconductor for photocatalytic water splitting into hydrogen production. However, the low charge-carrier utilization restricts its hydrogen evolution performance and practical application. In this work, a synergistic strategy of sulfur vacancy (S v ), internal electric field (IEF) and Mo-S bond was utilized for improving the charge-carrier utilization of MoS 2 /S v -MnS/ZnIn 2 S 4 composites. In particular, Z-scheme S v -MnS/ZnIn 2 S 4 heterojunction not only tackled the charge-carrier recombination problem but also improved the redox capability. Meanwhile, Schottky-type MoS 2 /S v -MnS contact further promoted the charge transfer through Mo-S bond “bridge”, accelerated the surface hydrogen reduction reaction kinetics, and thus boosted the charge-carrier utilization. As a result, the optimal MoS 2 /S v -MnS/ZnIn 2 S 4 catalysts could expeditiously produce 1.75 mL of hydrogen production within 3 h, and achieve a photocatalytic hydrogen evolution rate of 13.02 mmol g -1 h -1 . This work provides an ingenious method to synthesize ZnIn 2 S 4 -based photocatalysts with highly-efficient charge-carrier utilization.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Xiufeng Wang,Wenhui Ai,Ge Chen,Yao Jin,Jiayao Chen,Fang Wang,Ting Zhou,Guodong Zhang,Zhiqing Zhang
A novel Mo-MnO 2 nanoflowers (NFs) with oxidase-like (OXD-like) activity was performed by microwave-assisted hydrothermal synthesis, and the doping of Mo resulted in enhanced enzyme-like activity and stronger affinity for the chromogenic substrate 3,3′,5,5′-Tetramethylbenzidine (TMB) than single MnO 2 by the same synthesis method. In the presence of oxygen, Mo-MnO 2 NFs oxidized the colorless TMB to blue oxTMB, and the addition of isoniazid and ascorbic acid inhibited the color development reaction. Besides, it was further investigated that the inhibitory mechanism of INH and AA on the color development reaction of Mo-MnO 2 -TMB system, mainly due to the electrostatic interaction. The absorbance change of oxTMB at 652 nm could be used to quantitative detect isoniazid (INH) and ascorbic acid (AA). The linear ranges of colorimetric detection were 1–40 μM for INH and 1–30 μM for AA, and the limits of detection (LOD) were 0.436 μM for INH and 0.579 μM for AA, respectively. The successful application of this sensing platform in real samples further validated its practicality, demonstrating the broad potential in the field of colorimetric sensing.
研究领域:
生物化学
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纳米医学
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分析化学
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产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2022
·
IF 2.719
Lifeng Han,Yuheng Liu,Chaoqun Chang,Meng Liu,Zhikun Peng,Feilong Gong
We reported the design of cactus-like Mo-WO 3 nanoarchitecture assembled of 1D nanoneedles and 2D nanosheets for achieving a highly improved NO 2 sensing performance. The nanoneedles were vertically studding between the nanosheets forming a cactus-like WO 3 nanoarchitecture, leading to highly exposed absorption sites. Mo was introduced in the WO 3 nanoarchitecture to introduce oxygen vacancy, resulting in highly activated sites. The resultant 2%Mo-WO 3 delivered the sensitivity (Rg/Ra) of 285 to 10 ppm NO 2 , which was nearly three-times higher than that of pristine WO 3 . The recovery time was only 24 s, which was greatly decreased, compared with 172 s of pristine WO 3 .
研究领域:
材料科学
·
纳米技术
·
环境传感
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Qingxiang Kong,Yulei Li,Hang Ma,Qin Zhao,Linjing Yang,Ruidong Xu,Hong Guo
Hydrogen energy as a new type of clean energy has been widely used. Electrolysis is a highly effective method of producing hydrogen from water. Catalysts with low development costs and high efficiency are the focus of current research. A novel Ni–W–P/Mo catalyst for hydrogen evolution reaction (HER) was synthesized by electrodeposition based on a molybdenum mesh. The experimental results show that when the current density is 10 mA/cm2, the best overpotential of Ni–W–P/Mo in alkaline medium is 75 mV. Not only that, the Tafel slope (77 mV/dec) also proves its excellent dynamic performance. In addition, the 60 h stability test at a current density of 10 mA/cm2 indicates an excellent long-term stability performance. Compared with the catalysts reported in recent years, the HER performance of Ni–W–P/Mo is much better than that of most nonprecious metal catalysts. The uniform and regular molybdenum network provides a large area of support for the catalyst, which is conducive to the synthesis and reaction of the catalyst. By doping W, the electronic structure of the catalyst is regulated, and the water decomposition is promoted. The stability of the morphology is also an important factor in improving the activity of the catalyst. The amorphous catalyst synthesized by the electrodeposition method in this work provides a new idea for the research of catalytic materials for hydrogen production by electrolysis of water and has important significance for promoting the development of a hydrogen energy economy.
研究领域:
材料科学
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电化学
·
能源研究
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Liang Qiao,Qi You,Xinyuan Wu,Huihua Min,Xiaomin Liu,Hui Yang
The Ni-rich Co-poor layered cathode (LiNixCoyMn1–x–yO2, x ≥ 0.9) is a candidate for the next-generation lithium-ion batteries due to its high specific capacity and low cost. However, the inherent structural instability and slow kinetics of Li+ migration hinder their large-scale application. Mo doping is proposed to enhance the crystal structure stability of LiNi0.9Co0.05Mn0.05O2 and to ensure the preservation of the spherical secondary particles after the cycle. The characterization results indicate that Mo doping not only significantly relieves the lattice strain accompanied by H2 → H3 phase transition but also alleviates particle stress accumulation to avoid pulverization. The Mo-modification allows the generation of uniform fine primary particulates and further agglomeration into the smooth secondary particles to inhibit electrolyte penetration. Hence, the Mo-modified sample NCM90-1%Mo displays an excellent capacity retention of 85.9% after 200 cycles at 0.5 C current density, which is 23.8% higher than that of the pristine NCM90. In addition, with the expansion of the Li slab to accelerate Li+ diffusion and the fine primary particles to shorten the Li+ pathway, the NCM90-1%Mo sample exhibits a high discharge capacity of 150 mAh g–1 at 5 C current density. This work provides a new thought for the design and construction of high-capacity cathode materials for the next-generation lithium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2020
·
IF 3.442
Yuting Song,Wencheng Fang,Caixia Liu,Zhixia Sun,Fengyan Li,Lin Xu
Modification of semiconductor materials by polyoxometalates (POMs) is a promising strategy for increasing their photoelectrocatalytic (PEC) activity. In this work, we synthesized POM-modified CdS composite nanocrystals based on three kinds of Keggin-type mixed-addendum Mo/W POMs (Ag 3 PMo 3 W 9 O 40 , Ag 3 PMo 6 W 6 O 40 , and Ag 3 PMo 9 W 3 O 40 ). This is the first report on the semiconductor properties of the three Keggin-type mixed-addendum Mo/W POMs. Their PEC performances were studied by transient photocurrent responses, electrochemical impedance spectroscopy , and PEC oxidation of As(III) to As(V). The PEC performances of POM-modified CdS composite nanocrystals (CdS/Ag 3 PMo 3 W 9 O 40 , CdS/Ag 3 PMo 6 W 6 O 40 , and CdS/Ag 3 PMo 9 W 3 O 40 ) were superior to the performance of pure CdS nanocrystals. CdS/Ag 3 PMo 3 W 9 O 40 composite nanocrystals exhibited the highest efficiency for the PEC oxidation of As(III) to As(V), which was about 85% higher than that of the pure CdS nanocrystals. The present study provides insight into developing novel composite nanocrystals with Keggin-type mixed Mo/W POMs for efficient PEC oxidation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Xindou Yu,Jin Zhang,Xiaomin Zhang,Kedi Cai
The potassium‑oxygen battery (KOB) as the only new system in metal-air batteries does not generate singlet oxygen ( 1 O 2 ). It is a novel high-energy-density storage device which has attracted widespread attention. However, the low efficiency of potassium ion and oxygen transfer in KOB, along with slow kinetics, results in poor cycling stability. For this reason, a new composite catalytic material with a multicomponent Mo@VN/V 2 O 3 -Co 3 O 4 in cathode of KOB has been designed and prepared. The homologous heterostructure formed between VN and V 2 O 3 exhibits a good lattice match, enhancing the carrier mobility and electrochemical activity of the electrode, thereby increasing the discharge capacity of the KOB. The multicomponent active interface formed between Co 3 O 4 and VN/V 2 O 3 stimulates more electrons to participate in redox reactions, and the synergistic catalytic effect promotes the reversible decomposition of KO 2 , improving the cycle life of the KOB. The doping of Mo enables Mo 6+ to enter the V 2 O 3 lattice, replacing some V δ+ , which creates crystal defects that facilitate the rapid diffusion of K + and O 2 in the electrode. Final, the Mo@VN/V 2 O 3 -Co 3 O 4 is used as a cathode catalyst of KOB, shown discharge specific capacity of 1899.61 mAh·g −1 with a cycle life >170 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 9
·096514
·
IF 4.386
Zhijie Pan,Pengwei Huang,Yuanming Zhang,Xionghui Fu,Yi Zhu
Photoelectrocatalytic methanol oxidation to formaldehyde by using electric/solar energy is a promising technology. In this work, Ag nanoparticles were decorated on Mo-doped BiVO4 to synthesize Ag/Mo: BiVO4 catalyst. As expected, benefitting from Mo-dopant and plasmonic effect of Ag nanoparticles, formaldehyde production of Ag/Mo: BiVO4 photoanode was 2.2 times higher than pristine BiVO4 photoanode. Faradaic efficiency increased from 19% to 49% in comparison with the pure BiVO4 photoanode.
研究领域:
光电化学
·
催化
·
材料科学
·
能量转换
✓ 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）