CHINESE JOURNAL OF CHEMISTRY
·
2023
·Vol. 42
·期 2
·119-128
·
IF 5.4
Qiong Zhang,Ruixue Zhang,Yingxiu Zhao,Tiantian Sun,Jianyang Gao,Guang-Rui Xu,Zexing Wu,Yu Yang,Lei Wang
Comprehensive Summary Realizing the hydrogen economy by water electrolysis is an attractive approach for hydrogen production, while the efficient and stable bifunctional catalysts under high current densities are the bottleneck that limits the half-cell reactions of water splitting. Here, we propose an approach of hydrothermal and thermal annealing methods for robust MoO 2 /MoNi 4 @Ru/RuO 2 heterogeneous cuboid array electrocatalyst with multiplying surface-active sites by depositing a monolayer amount of Ru. Benefiting from abundant MoO 2 /MoNi 4 @Ru/RuO 2 heterointerfaces, MoO 2 /MoNi 4 @Ru/RuO 2 heterogeneous cuboid array electrocatalysts effectively drive the alkaline water splitting with superior hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) performances. The synthesized MoO 2 /MoNi 4 @Ru/RuO 2 has high HER activity, which realizes the working overpotentials of 48 mV at 50 mA·cm –2 , further achieving overpotentials of 230 mV for industry-level 1000 mA·cm –2 in alkaline water electrolysis. Moreover, it also showed an enhanced OER activity than commercial RuO 2 with a small overpotential of 280 mV at 200 mA·cm –2 in alkaline media. When building an electrolyzer with electrodes of (–)MoO 2 /MoNi 4 @Ru/RuO 2 IIMoO 2 / MoNi 4 @Ru/RuO 2 (+), a cell voltage of 1.63 V and 1.75 V is just required to support the current density of 200 mA·cm –2 and 500 mA·cm –2 in alkaline water electrolysis, much lower than that of the electrolyzer of (–)Pt/CIIRuO 2 (+). This work demonstrates that MoO 2 /MoNi 4 @Ru/RuO 2 heterogeneous nanosheet arrays are promising candidates for industrial water electrolysis applications, providing a possibility for the exploration of water electrolysis with a large current density.
研究领域:
材料科学
·
电化学
·
能源材料
·
催化
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Chenhui Xu,Yang Yang,Chengyang Hui,Pengfei Tang,Genlei Zhang,Jialun Liu,Zhenzhen Yang
Highly efficient synthesis of 2,5-diformylfuran (DFF) from 5-hydroxymethylfurfural (HMF) or fructose has attracted much attention in recent years. Herein, one-dimensional MoO2@a-NCx core–shell nanorods that oxygen vacancy-rich molybdenum dioxide (MoO2) coated with porous amorphous nitrogen-doped carbon layer (a-NC) are synthesized via pyrrole polymerization followed by pyrolysis, using orthorhombic molybdenum trioxide (α-MoO3) nanorods as a precursor. Benefiting from the well-engineered architecture and the strong interfacial interaction between MoO2 and surface carbon, the optimized MoO2@a-NC9 with an a-NC layer thickness of ∼9 nm exhibits considerable catalytic activity and stability in oxidation of HMF/fructose to DFF. Under optimal reaction conditions, MoO2@a-NC9 achieves nearly quantitative DFF yield of 99.1% with complete HMF conversion (100%) in the aerobic oxidation of HMF. A possible reaction mechanism involving a Mo4+/Mo3+ redox cycle is proposed for MoO2@a-NC9-catalyzed oxidation of HMF to DFF, based on experimental and characterization results. Furthermore, MoO2@a-NC9 served as a bifunctional catalyst for direct conversion of fructose to DFF via a “one-pot, two-step” approach, achieving a high DFF yield of 82.5%. Notably, this catalyst exhibits excellent recyclability, maintaining its catalytic performance over at least six reaction cycles without significant activity decay.
研究领域:
催化
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纳米材料
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绿色化学
·
有机合成
·
能量转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Fenglong Wu,Xiao Tian,Jin Song,Ying Zhang,Wei Li
The activation of the water molecule (H₂O) serves as the rate-determining step for hydrogen (H 2 ) evolution from the photo-assisted hydrolysis of ammonia borane (NH₃BH₃). Therefore, developing a low-cost efficient catalyst that can expedite the cleavage of O H bonds in H₂O is needed for improving hydrogen production efficiency in practical applications. Here, we prepared a supported non-noble metal catalyst (Co/Mo@MoO 2 –200) with a large number of active sites, comprising ultrathin low-crystalline cobalt (Co) nanosheets grown on amorphous molybdenum oxide (MoO 2 )-coated molybdenum (Mo) nanoparticles (Mo@MoO 2 –200), which serves as a high-performance non-noble metal catalyst to accelerate the activation of O H bonds in H 2 O. Notably, visible light irradiation facilitates the formation of ultrathin Co nanosheets by inducing the localized surface plasmon resonance of MoO 2 , as verified by transmission electron microscopy (TEM) images. Moreover, X-ray absorption near-edge structure (XANES) and X-ray photoelectron spectroscopy (XPS) spectra confirm the electron transfer from Co nanosheets to O sites in Mo@MoO 2 –200, establishing robust interfaces. Co/Mo@MoO 2 –200 exhibits high catalytic performance with the turnover frequency (TOF) value of 110.8 min −1 under visible light irradiation, which is greater than that of Co/Mo by 1.21 times and most of the reported Co-based catalysts. DFT calculations reveal that the Mo@MoO 2 –200 support in the catalyst can promote the Co-adsorption of NH 3 BH 3 and H 2 O, while facilitating H 2 desorption. Particularly, the Co/Mo@MoO 2 –200 can significantly decrease the activation energy barrier of the O H bond in H 2 O, compared with pristine Co and Mo@MoO 2 –200. This paper presents a flexible catalyst design strategy for NH 3 BH 3 hydrolysis and other H 2 O-associated catalytic reactions.
研究领域:
催化化学
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纳米材料
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氢能
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表面化学
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光化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Bobo Wang,Zhe Zhang,Shanshan Zhang,Yuncheng Cao,Yong Su,Shude Liu,Wei Tang,Junxi Yu,Yun Ou,Shuhong Xie,Jiangyu Li,Ming Ma
Electrocatalytic water splitting, including hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), is an ideal method to produce hydrogen energy source. Stable electrocatalysts with good electrolytic activity are crucial for long-term water splitting. In this work, we show that MoO 2 nanosheets can be grown directly on nickel foam substrate with oxygen vacancies decorated on the surface, acting as an excellent electrocatalyst for practical water splitting. In comparison to the pristine sample, the optimized MoO 2 , treated by 2% N 2 H 4 solution for 20 min, exhibits a relatively low onset potential of −60 mV vs. reversible hydrogen electrode (RHE) for HER and a cell voltage of about 1.6 V vs. RHE to achieve a current density of 85 mA cm −2 for OER, which are attributed to the enhanced conductivity and improved surface active sites facilitated by oxygen vacancies. With the accelerated hydrogen generation process and activated water oxidation reaction, MoO 2 is demonstrated to be a suitable and stable bifunctional electrode for full water splitting, and the post-treatment process for oxygen vacancies also provides an effective strategy for improving electrocatalysis.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
·
2018
·Vol. 255
·期 9
·1800254
·
IF 1.729
Jiao Shi,Di Wu,Xiaoming Zheng,Dingdong Xie,Fei Song,Xueao Zhang,Jie Jiang,Xiaoming Yuan,Yongli Gao,Han Huang
One-dimensional (1D) atomically thin crystals have attracted considerable interests due to their unique properties and potential applications. For example, reducing graphene physical size down to nanoscale to nanoribbons opens up band gaps, which makes graphene useful in electronic devices. Here, a facile approach to produce single- and bi-layered MoS 2 nanobelts by PMMA assisted decoupling of MoO 2 @MoS 2 core–shell nanorods is reported by the authors. Atomic force microscopy (AFM), Raman and photoluminescence (PL) results show that the decoupled monolayer staple-like MoS 2 -shells can fold into bilayer nanobelts during the PMMA removal process. Raman, high-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) results reveal that the left MoO 2 nanorods exhibit high crystal-quality. These findings provide a method to produce 1D MoS 2 nanobelts, which have potential applications in electronics and catalysis.
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Shuya Wang,Zurui Qiu,Lulu Li,Hong Zheng,Jingru Wang,Jiankun Zhang,Minghao Wang,Zhenzhen Tan,Quanchao Zhuang
Waste management is essential to achieve sustainable development and protect the environment. Herein, a strategy was tested to utilize large volumes of lotus petiole waste. In this work, a composite supercapacitor electrode of lotus petiole with a porous structure and MoO2 with an ice flower structure was fabricated via an in situ hydrothermal growth method. The prepared PC-50 lotus petiole–porous carbon material exhibited a unique hierarchical porous structure and a high specific surface area (1887 m2 g–1). The composite electrode exhibits high reversible capacity (515.10 mAh g–1 at 2 A g–1) in the three-electrode system. The maximum gravimetric energy density reached 30.10 W h kg–1 at a power density of 387 W kg–1, and a favorable energy density of 20.19 W h kg–1 was retained even at a high power density of 3.69 kW kg–1 in the symmetric device. Moreover, the symmetric device shows superior cycling stability (91.60% capacity retention in 2000 cycles). Electrochemical impedance spectroscopy was used to study the electrochemical interface characteristics and verify the electrochemical performance of the composite electrodes. The research results provide guidance for the design of high-performance metal oxide–biomass carbon composites and the comprehensive utilization of waste biomass.
研究领域:
能源存储材料
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环境科学
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生物质利用
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2025
·Vol. 44
·期 4
·2830-2835
·
IF 11
Liu Qian,Liu Jing-Yi,Zhou Bo-Jian,Liu Jia-Geng,Liu Qi-Ye,Liu Ying,Zhao Yu-Qing,Jiang Shao-Long
Two-dimensional (2D) MoO2, a binary nonlayered material, has been extensively studied for potential applications in catalysis and electronics. However, the preparation of 2D MoO2 remains challenging. Herein, we report the growth of 2D MoO2 flakes with rhombic morphology on the sapphire substrate via a chemical vapor deposition (CVD) method. Atomic force microscopy shows the CVD-grown MoO2 flakes with thin thickness. The CVD-obtained MoO2 with a stoichiometric ratio of 1:2 is verified using energy-dispersive X-ray spectroscopy. Scanning transmission electron microscopy (STEM) characterization reveals the high-quality, single-crystal nature of the CVD-derived 2D MoO2 flakes. The phonon vibration and structural transition of 2D MoO2 are investigated by temperature-dependent and high-pressure Raman spectra. This study paves the way for exploring the pressure-dependent properties of 2D MoO2.
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产品关联
DOI
高影响因子
CURRENT APPLIED PHYSICS
·
2020
·Vol. 20
·期 10
·1130-1135
·
IF 2.281
Jinxin Liu,Jiao Shi,Di Wu,Xiaoming Zheng,Fengming Chen,Junting Xiao,Youzhen Li,Fei Song,Yongli Gao,Han Huang
Molybdenum dioxide (MoO 2 ) materials have attracted considerable interests due to their superduper properties and potential applications, relating to the growth directions and exposed surfaces. Here, we reported as the substrate changes from c-to m-sapphire, the growth direction of epitaxial MoO 2 nanorods via an atmospheric pressure chemical vapor deposition approach changes along from <001> to <010> of bulk monoclinic MoO 2 accompanied by exposing different surfaces. Optical microscopy (OM), Raman spectroscopy , X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), cross-sectional scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) measurements reveal these MoO 2 nanorods are epitaxially grown on m-sapphire substrates with the orientation of MoO 2 (101)//sapphire ( 10 1 ‾ 0 ) and MoO 2 <010> in line with sapphire <0001>. The electrical conductivity significantly depends on the crystallographic direction of MoO 2 nanorods . The method to control the growth directions of 1D MoO 2 nanorods has potential applications in nanoelectronic devices.
研究领域:
材料科学
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纳米技术
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凝聚态物理
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电子材料
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·8394
·
IF 15.7
Luo Lei,Wu Yao,Li Lei,Zhang Zhonghan,Zheng Lu,Zhu Chao,Xu Manzhang,Li Weiwei,Duan Ruihuan,He Yanchao,Zhou Xin,Fu Qundong,Wu Gang,Yang Jiefu,Wu Qi,Huang Wei,Wang Xuewen,Liu Zheng
Transition metal dichalcogenide (TMD) nanotubes are emerging quantum materials with distinctive symmetry-breaking properties, offering significant potential for energy conversion technologies. However, the direct synthesis of crystalline MoS 2 nanotubes remains challenging due to limited understanding of their high-temperature growth mechanisms. Here, we present a robust and controllable strategy for the direct growth of crystalline MoS 2 nanotubes with well-defined tubular morphology and high structural uniformity. This approach features two key innovations: first, the controlled introduction of hydrogen reduces MoO 3 into one-dimensional (1D) tetragonal MoO 2 (space group I4/m) chains via a vapor–liquid–solid (VLS) mechanism; second, precise temperature zoning ensures timely sulfur vapor infusion for complete sulfurization. The intermediate MoO 2 phase, with its singular crystallographic orientation, acts as an ideal template for nanotube formation. Tellurium (Te) serves as a fluxing mediator to promote the formation of uniform MoO 2 nanowires, which are subsequently converted into MoS 2 nanotubes. By systematically tuning the hydrogen concentration, we reveal its critical role in directing product morphology. The resulting MoS 2 nanotubes exhibit pronounced symmetry breaking and significant bulk photovoltaic performance, achieving a photoresponsivity of 510 A cm −2 under 1.88 × 10 4 W cm −2 illumination. This work advances both the fundamental understanding of nanotube growth and the development of symmetry-engineered optoelectronic materials.
研究领域:
材料科学
·
纳米技术
·
凝聚态物理
·
光电子学
·
能量转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOM
·
2022
·Vol. 74
·期 7
·2742-2749
·
IF 2.597
Zhang Rui-Hua,Hao Zhen-Hua,Shi Lin-Yuan,Chen Hao-Tian,Shu Yong-Chun,He Ji-Lin
In this present study, carbothermic reduction process of MoO 3 to produce MoO 2 has been carried to investigate the influences of reaction temperature and distance between activated carbon and MoO 3 on phase composition of reduction products by controlling carbon diffusion. Results show that the reduction degree increases with the increase of temperature and the decrease of distance between activated carbon and MoO 3 . MoO 3 can be completely reduced to MoO 2 at 680°C with the carbon distance of 1 mm. It is found that the transformation from MoO 3 to MoO 2 is a process of crystal cracking and growth by observing the phase transition and morphological evolution during the reduction. The massive MoO 3 is first decomposed into a platelet-shaped MoO x (2.75 < x < 3), then the platelet-shaped MoO x changes into a needle-like shape or irregular platelet-like Mo 4 O 11 , and finally Mo 4 O 11 changes into irregular granular or irregular platelet-like shaped crystals, which form MoO 2 powders.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Lihong Liu,Bo Li,Ming Yang,Yannan Mu,Duo zhang,Lihua Huo
Metal oxide and graphene composite material have been a promising material for developing electrochemical sensors. In this work, we prepared graphene (rGO) doped MoO 2 hollow nanosphere composite (MoO 2 /rGO) using a simple one-step solvothermal without any template.The hollow nanosphere was constructed by nanoparticles and uniformly anchored onto graphene sheets.The dopamine (DA) sensor was constructed by modifying the MoO 2 /rGO composite to the glass carbon electrode (GCE) surface with a simple drop coating (MoO 2 /rGO/GCE), which shows high sensitivity(101.20 μA·μM -1 ·cm -2 ), low detection limit (6.8 nM), high selectivity and good stability for DA. Meanwhile, the MoO 2 /rGO/GCE demonstrates very little interference with dopamine determination when both Uric acid (UA) and ascorbic acid (AA) are present. The exceptional efficacy of the sensor is attributed to the MoO₂/rGO composite's unique attributes,which include a hollow structure, low charge transfer resistance, a large electrochemical active area, and an abundance of active sites. Furthermore, the MoO₂/rGO/GCE sensor demonstrates capabilities for the detection of minute dopamine levels in human serum, utilizing the standard addition method. This suggests its applicability in the realm of biomedical diagnostics.
研究领域:
材料科学
·
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.5
Qiuye Deng,Gaoyuan Liu,Jing Xie,Jindou Hu,Zhenjiang Lu,Yali Cao
Molybdenum dioxide has emerged as a promising anode material for lithium-ion batteries (LIBs), owing to its distinct advantages of high theoretical specific capacity, efficient charge transfer kinetics, and multivalent oxidation states. Its layered crystal structure facilitates rapid Li+ diffusion, while its multielectron transfer mechanism enables enhanced energy storage density, positioning it as a competitive alternative to conventional graphite anodes. We achieve the layered structure by synthesizing amorphous molybdenum dioxide (MoO2−x) through a solution-based approach combined with low-temperature annealing. This tackles the critical challenges of structural degradation and restricted conductivity commonly encountered in transition metal oxide anodes. The non-crystalline structure of the as-prepared material induces reconfigured atomic arrangements, leading to a marked improvement in electronic conductivity and an enhancement in the kinetic response of Li+ insertion/extraction reactions during extended charge–discharge cycles. Electrochemical tests demonstrate that the optimized amorphous MoO2−x anode demonstrates an exceptional reversible discharge capacity of 817.1 mAh g−1 at a current density of 0.1 A g−1. Moreover, the material exhibits exceptional cycling durability, retaining a capacity of 436.3 mAh g−1 even after 500 charge–discharge cycles at an elevated current density of 5.0 A g−1. Empirical evidence demonstrates that amorphous phase engineering significantly enhances both the structural integrity and cycling stability of MoO2−x, facilitating its real-world implementation as a superior anode material in next-generation lithium-ion battery systems. This observation highlights the potential of non-crystalline design strategies as a systematic approach for optimizing transition metal oxide-based anodes for advanced energy storage technologies.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）