Journal of Energy Chemistry
·
2026
·
IF 15.6
Jia Sun,Chunyu Zhang,Hang Song,Yu Kang,Zhenqing Zhang,Yujia Han,Lu Shang,Lixue Zhang,Xiaoli Yang,Yi Cui
The sluggish water dissociation kinetics and suboptimal hydrogen adsorption on Ru-based catalysts remain major challenges for efficient alkaline hydrogen evolution reaction (HER). Constructing spatially coupled yet functionally distinct active sites through metal-support interaction (MSI) offers a promising route to overcome these intrinsic kinetic limitations. Herein, a pathway-controlled defect engineering strategy is developed, in which carbon is introduced in situ during oxide reduction to generate oxygen-vacancy-rich MoO 2− x supports and thereby establish strong MSI with Ru. Structural and spectroscopic analyses reveal that oxygen vacancies in MoO 2− x preferentially adsorb and activate interfacial water, while defect-mediated MSI electronically modulates Ru to optimize *H binding. In situ attenuated total reflection surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) and density functional theory calculations collectively demonstrate that this interfacial synergy induces strong water-support interactions, effectively lowering the Volmer-step energy barrier under alkaline conditions. As a result, Ru/C-MoO 2− x -800 delivers outstanding alkaline HER performance, achieving an overpotential of 23 mV at 10 mA cm −2 with a Tafel slope of 35 mV dec −1 . The catalyst sustains stable operation for 1000 h at an application-relevant current density of 250 mA cm −2 in an anion exchange membrane water electrolyzer (AEMWE). This work establishes defect-regulated MSI as an effective design principle for decoupling water activation and hydrogen adsorption in alkaline HER. Tailored oxygen vacancy engineering strengthens Ru-MoO 2− x metal-support interactions and regulates interfacial water activation and hydrogen adsorption energetics, enabling efficient and durable alkaline hydrogen evolution. Download: Download high-res image (210KB) Download: Download full-size image
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DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Wei Ren,Ruiru Si,Jiahui Wang,Yang Yang,Jingbiao Ge,Xiuzhen Zheng,Shifu Chen
Inspired by natural photosynthesis, photocatalysis is considered a powerful means to address environmental pollution and the energy crisis. In this work, CdIn2S4 (CIS) nanosized octahedrons modified with sheet-like porous MoO2/MoP (MOP) as a non-noble metal cocatalyst were prepared by a simple hydrothermal method. In order to obtain the optimal MOP cocatalysts, the photocatalytic performance of the MOP/CIS composites was evaluated by H2 production and pollutant degradation under visible light irradiation. Among them, 7% MOP/CIS showed the best photocatalytic activity in H2 production (5.96 mmol·g–1·h–1), much higher than that of pure MOP and CIS. Additionally, it demonstrated excellent performance in the degradation of tetracycline (TC) and methyl orange (MO), with rate constants as high as 0.04911 min–1 and 0.03504 min–1, respectively. The superior photocatalytic performance of the MOP/CIS heterostructure was mostly attributed to the morphology design, broad visible light absorption, and effective separation of photogenerated charge carriers. This work provides a promising nanostructure design of visible-light-driven metal sulfide heterostructure for photocatalytic H2 production and pollutant degradation.
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高影响因子
Energy Storage Materials
·
2017
·
IF 0
Xu Zhao,Hong-En Wang,Xiaoxi Chen,Jian Cao,Yundong Zhao,Zachary Garbe Neale,Wei Cai,Jiehe Sui,Guozhong Cao
Multifunctional anode materials with high durability and outstanding rate capability are desirable for alkali-ion storage applications, such as lithium ion batteries (LIBs) and sodium ion batteries (SIBs). The present study illustrates a tubular nanoarchitecture composed of ultra-fine MoO 2 nanodomains embedded in hierarchical carbon nanosheets by sol-gel processing and post-annealing. The metallic characteristics and small crystallites of MoO 2 not only favor ionic/electronic transport, but also shorten the diffusion length . Hierarchical arrangement of nanosheets and tubular architecture offer sufficient electrode/electrolyte contact and excellent strain-accommodation associated with Li/Na-intercalation. Electrochemical measurements show that hierarchical tubular MoO 2 enable the rapid, reversible, and durable storage of Li/Na-ions. A capacity retention of 89% and 96% is retained at a high rate of 10 A g −1 over 10 000 cycles for LIBs and SIBs, respectively. The greatly enhanced Li/Na ion storage capacity is attributed to the significant pseudocapacitance contributions up to approximately 80% and 95% at 2 mV s −1 for LIBs and SIBs, respectively. These results not only hold prospects for the multifunctional fabrication of durable energy storage devices, but also demonstrate the potential applications of metallic MoO 2 for next-generation clean energy strategies.
研究领域:
材料科学
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能源存储
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DOI
Small
·
2024
·Vol. 20
·期 43
·2403118
·
IF 13
Tianchi Li,Wengui Jiang,Yonghuang Wu,Liang Zhou,Huanyu Ye,Yuchen Geng,Minghui Hu,Kai Liu,Rongming Wang,Yinghui Sun
Two-dimensional (2D) semiconducting transition metal dichalcogenides (TMDCs) are extensively employed as channel materials in advanced electronic devices. The electrical contacts between electrodes and 2D semiconductors play a crucial role in the development of high-performance transistors. While numerous strategies for electrode interface engineering have been proposed to enhance the performance of n-type 2D transistors, upgrading p-type ones in a similar manner remains a challenge. In this work, significant improvements in a p-type WSe 2 transistor are demonstrated by utilizing metallic MoO 2 nanosheets as the electrode contact, which are controllably fabricated through physical vapor deposition and subsequent annealing. The MoO 2 nanosheets exhibit an exceptional electrical conductivity of 8.4 × 10 4 S m ‒1 and a breakdown current density of 3.3 × 10 6 A cm ‒2 . The work function of MoO 2 nanosheets is determined to be ≈5.1 eV, making them suitable for contacting p-type 2D semiconductors. Employing MoO 2 nanosheets as the electrode contact in WSe 2 transistors results in a notable increase in the field-effect mobility to 92.0 cm 2 V ‒1 s ‒1 , which is one order of magnitude higher than the counterpart devices with conventional electrodes. This study not only introduces an intriguing 2D metal oxide to improve the electrical contact in p-type 2D transistors, but also offers an effective approach to fabricating all-2D devices.
研究领域:
材料科学
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纳米电子学
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半导体器件
·
薄膜制备
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DOI
高影响因子
MATERIALS & DESIGN
·
2020
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IF 6.289
Jianwei Liang,Xiaoning Zhang,Chi Yan,Yixuan Wang,Michael L. Norton,Xijun Wei,Carrie Donley,Yong Zhu,Peng Xiao,Yunhuai Zhang
As a key building block to power flexible electronics, there is need for the development of flexible current collectors. Bombyx mori silk, a traditional textile, attracts increasing attention for its potential application in flexible electronics and is a promising raw material for flexible carbon electrodes in current collector fabrication. In this work, molybdenum dioxide nanoparticles (MoO 2 NPs), which possess chemical stability and high mass specific capacitance, was used as a feed additive and combined with mulberry leaves to raise silkworms. It was found that the MoO 2 NPs were embedded within the silk fibers, which endowed the resulting silk with favorable features for electrochemical energy storage in flexible electronics. After carbonization, the specific capacitance of electrodes prepared with silk from the MoO 2 NPs feeding group, with a mass/volume ratio of 5 g/L, was enhanced from 100 F/g to 245 F/g at a current density of 0.2 A/g. Impressively, the electrodes show high coulombic efficiency with excellent stability. This work demonstrates the possibility of producing carbonized silk with superior properties for developing silk-based flexible electrodes for use in energy storage devices in a large-scale, green, low-cost way.
研究领域:
材料科学
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储能技术
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纳米技术
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纺织工程
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 36
·15396-15402
·
IF 3.288
Lina Zhang,Min Zhang,Libin Liu,Yanqin Wang,Jing Zheng,Jingli Xu
Decoration of transition metal Ni nanoparticles (NPs) on magnetic supports is of special interest for histine-rich protein adsorption. Through a combination of a hydrothermal reaction, a mussel-inspired coating and a carbonization strategy, we have investigated two synthetic paths to access hierarchical nickel-based magnetic nanostructures: (1) Fe3O4 spheres are covered with hierarchical NiMoO4 nanosheets and subsequently coated with a polydopamine (PDA) layer, and Fe3O4@MoO2∩C–Ni composites are synthesized after pyrolysis in a nitrogen atmosphere, and (2) Fe3O4 spheres are coated with PDA and subsequently covered with hierarchical NiMoO4 nanosheets, and then Fe3O4@C∩MoO2–Ni composites are obtained after pyrolysis in a nitrogen atmosphere. We find that only route 1, which can be defined as a space-confined carbonization strategy, results in the formation of a high coverage of nickel NPs with tiny diameter decorated on Fe3O4 spheres. Route 2, defined as a non-space-confined carbonization strategy, leads to the formation of low density and large size Ni NPs. Detailed examination of the nickel-based magnetic composites obtained by route 1 displayed superior adsorption capacity for BHb than that of route 2. The results demonstrated that the space-confined strategy is greatly beneficial for the synthesis of Ni-based magnetic composites with high coverage, which would pave a novel way for synthesizing high density Ni-based magnetic composites.
研究领域:
材料科学
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生物医学工程
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DOI
高影响因子
Solar RRL
·
2019
·Vol. 4
·期 8
·1900416
·
IF 0
Huang Jing Wei Li,Huimin Zhou,Kejun Chen,Kang Liu,Shi Li,Kexin Jiang,Wenhao Zhang,Yanbo Xie,Zhou Cao,Hongmei Li,Hui Liu,Xiaowen Xu,Hao Pan,Junhua Hu,Dongsheng Tang,Xiaoqing Qiu,Junwei Fu,Min Liu
Directly using solar energy to realize photocatalytic reduction of CO 2 to hydrocarbon fuels is an effective tactics to solve the energy crisis and carbon emission. Although graphite carbon nitride (g-C 3 N 4 ) has been widely studied as a star photocatalyst for CO 2 reduction, the extremely fast charge recombination rate seriously limits its performance. Loading suitable co-catalysts to construct an effective junction is considered an efficient way to solve this issue and promote photocatalytic performance. In this work, metallic molybdenum dioxide (MoO 2 ) is dispersed on g-C 3 N 4 nanosheets to construct a Schottky junction photocatalyst. The Schottky junction between MoO 2 and g-C 3 N 4 induces efficient charge separation and transfer. As a result, the optimal MoO 2 /g-C 3 N 4 Schottky junction photocatalyst exhibits a 15 times higher CH 4 yield and five times higher CO yield compared with pure g-C 3 N 4 . This article provides a new route to construct a Schottky junction for boosting photocatalytic activity.
研究领域:
材料科学
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环境科学
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能源科学
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DOI
Small Methods
·
2023
·Vol. 7
·期 6
·2201659
·
IF 12.4
Ran Xiao,Fenfen Wang,Li Luo,Xincheng Yao,Yongchao Huang,Zhongmin Wang,M.-Sadeeq Balogun
The exploration of cost-effective multifunctional electrodes with high activity toward energy storage and conversion systems, such as self-powered alkaline water electrolysis, is very meaningful, although studies remain quite limited. Herein, a heterogeneous nickel-molybdenum (NiMo)-based electrode is fabricated for the first time as a trifunctional electrode for asymmetric supercapacitor (ASC), hydrogen evolution reaction, and oxygen evolution reaction. The trifunctional electrode consists of Ni 4 Mo and MoO 2 (denoted Ni 4 Mo/MoO 2 ) with hierarchical nanorod heterostructure and abundant heterogeneous nanointerfaces creating sufficient active sites and efficient charge transfer for achieving high performance self-power electrochemical devices. The ASC consists of the as-prepared Ni 4 Mo/MoO 2 positive electrode, showing a broad potential window of 1.6 V, and a maximum energy density of 115.6 Wh kg −1 , while the alkaline overall water splitting (OWS) assembled using the as-prepared Ni 4 Mo/MoO 2 as bifunctional catalysts only requires a low cell voltage of 1.48 V to achieve a current density of 10 mA cm −2 in aqueous alkaline electrolyte. Finally, by integrating the Ni 4 Mo/MoO 2 -based ASC and OWS devices, an aqueous self-powered OWS is assembled, which self-power the OWS to generate hydrogen gas and oxygen gas, verifying great potential of the as-prepared Ni 4 Mo/MoO 2 for sustainable and renewable energy storage and conversion system.
研究领域:
材料科学
·
电化学
·
能源转换与存储
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DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2025
·
IF 3.2
Yin Hailiang,Zhou Tongna,Shen Zhonglan,Li Huanhuan,Zhang Guangyan,Guo Lingxiao,Liu Chenguang
A new strategy has been developed for the preparation of ordered mesoporous carbon materials (OMCs) using weak organic acid induction assisted by 1,3,5-Trimethylbenzene (TMB). The type of acid, reaction temperature, TMB addition amount, and salt type all have different significant effects on the microstructure and morphology of carbon materials. In the absence of salt as a pore forming agent and inducing phase separation, OMCs was prepared by acetic acid induction at a reaction temperature of 100 °C and a TMB addition of 1 ml. The specific surface area and pore volume of mesoporous carbon are as high as 927 m 2 /g and 0.78 cm 3 /g, respectively, with a high mesoporous proportion of 72%. The catalyst obtained by loading MoO 2 and NiO nanoparticles on OMCs shows a higher specific surface area and a higher proportion of easily reducible octahedral molybdenum species compared to the catalyst obtained by loading metal on alumina. In the hydrodesulfurization (HDS) experiment of dibenzothiophene, the catalysts showed better HDS catalytic performance and higher hydrogenolysis activity.
研究领域:
材料科学
·
催化化学
·
纳米材料
·
能源与化学工程
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高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2019
·
IF 3.571
Yafu Tang,Shanmin Hou,Yuechao Yang,Dongdong Cheng,Bin Gao,Yongshan Wan,Yuncong C. Li,Zhen Yu,Yuanyuan Yao,Jiazhuo Xie
The complex synthesis process, low utilization, and single function of fungicides have seriously hindered the development of fungicides in resistance to rice sheath blight. Here, an inexpensive and multifunctional Cu(II)-based water-dispersible humic acid (Cu-WH) fungicide with growth-promoting ability was developed with a simple method. A 3D molybdate carbon hierarchical nanosphere (MoO2-C-HN) catalyst was successfully synthesized using a green route and applied in a solid-phase activation of lignite to obtain water-dispersible humic acid. Cu(II)-based water-dispersible humic acid (Cu-WH) was then formed through a simple reaction of Cu(II) and the humic acid. The resultant Cu-WH showed strong antifungal performance against Rhizoctonia solani in laboratory incubation experiments. After being treated with Cu3-WH (0.1 mg L–1), the control efficiency of rice sheath blight at 1, 3, and 5 days after infection was 90.54%, 78.96%, and 66.31%, respectively. It also enhanced the water-holding capacity of the substrate and thus effectively improved the growth of rice seedlings. In comparison to commercial rice seedling substrate, the substrate treated with 8 wt % of Cu3-WH increased plant height, stem diameter, fresh weight, and chlorophyll content by 19.23%, 35.91%, 14.52%, and 42.85%, respectively. The newly developed Cu-WH thus can be used as a novel low-cost efficient fungicide and growth stimulator to treat rice sheath blight as well as to increase rice production.
研究领域:
农业科学
·
植物保护
·
材料科学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Yidan He,Yunliang Dai,Yuke Zheng,Xiaojuan Zhang
The exploration of high-performance wave absorbing materials is particularly critical for solving electromagnetic pollution. Based on the designability and structural virtue of one-dimensional anisotropic structure, a succession of MoO2/N-doped carbon (MoO2/NC) heterogeneous nanorods with various aspect ratios have been synthesized by hydrothermal, chemical oxidation polymerization and calcination process. To investigate the effect of aspect ratio on the microwave attenuation capacity, these fabricated nanorods are compounded with polyvinylidene fluoride (PVDF) under different filler contents. It is concluded that the aspect ratio can effectively regulate the microwave absorption performance. Specifically, the MoO2/NC-1/PVDF composites acquire the RLmin value of −56.9 dB at 2.9 mm and the RLmin value (−44.2 dB) of MoO2/NC-2/PVDF composites appear at a thinner thickness of 1.8 mm under a filler loading of 15 wt%. With the increment of aspect ratio, the optimal effective absorption bandwidth (EAB) of MoO2/NC-3/PVDF composites extend up to 6.32 GHz at 2.0 mm within a filler content of only 10 wt%, covering the whole Ku band. Meanwhile, the radar cross section simulations of MoO2/NC/PVDF composites further verify their immense potential in practical application. This work demonstrates that the aspect ratio design is conducive to acquisition for regulable and broadband microwave absorption under low filler loading.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Rong Qiang,Yuancheng Ding,Yulong Shao,Lei Rong,De Zhang,Rui Hao,Rui Xue,Na Xiao,Hongchen Liu,Jiawen Qiu
Driven by the rapid advancement of electronic devices and wireless communication technologies, there is an urgent demand for high-performance microwave absorbing materials. In this work, one-dimensional MoO 2 /C composites were synthesized through an in-situ polymerization-pyrolysis strategy. By precisely tuning the pyrolysis temperature, remarkable microwave absorption performance was achieved. The resulting material exhibits a minimum reflection loss of −59.1 dB at a matching thickness of 1.7 mm and delivers an effective absorption bandwidth of 5.6 GHz at 2.0 mm. Furthermore, it demonstrates a radar cross-section of 27.08 dB·m² at a 0° scattering angle. Comprehensive experimental and theoretical analyses reveal that the enhanced electromagnetic wave attenuation is primarily attributed to one-dimensional interfacial polarization at the interfaces between MoO 2 nanorods and porous carbon layers, as well as efficient axial electron transport pathways. This work presented a viable strategy for the preparation of one-dimensional MoO 2 -based dielectric microwave absorption materials.
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高影响因子
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