ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xiaoqing Liu,Guangshe Li,Jinjiang Wu,Dan Zhang,Liping Li
Vanadium monoxide (VO) is a promising candidate as an anode for lithium-ion batteries due to its high theoretical capacity, low cost, and considerable electronic conductivity. Unfortunately, a large volume change during electrochemical processes obstructs its practical application. In this work, a composite of VO nanorings grown on a porous carbon architecture is prepared via a topochemical self-reduction approach. When used as an anode for lithium-ion batteries, improved redox kinetics from enhanced electronic conduction and the corresponding fast lithium-ion diffusion is observed to greatly promote the electrochemical performance of lithium-ion batteries. The resulting composite delivered a reversible capacity of 336 mA h g–1 after 400 cycles at 10 A g–1 with a capacity retention of 85%, owing to the synergistic effect of VO nanorings and porous carbon in alleviating volume changes that result in a long-term cycling ability at a high current density. At 20 A g–1, the composite anode exhibited a rate capability of 235 mA h g–1, superior to all VO-based electrodes reported in the literature. Furthermore, a full cell was first fabricated by employing VO@C-2 as the anode and LiFePO4 as the cathode, which exhibited a capacity of 213 mA h g–1 after 100 cycles at 0.1 A g–1, indicating the potential of VO as an anode for practical application.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.7
Wen Yu,Weizhou Chai,Zhenhua Chen,Haitao Li,Yu Qiao,Hangcheng Yang,Guiyin Xu,Hengda Sun,Yu Chen,Hongkang Wang
Na 3 (VO) 2 (PO 4 ) 2 F (NVOPF) has been recognized as a promising cathode of sodium-ion batteries (SIBs) owing to its high working potential and high energy density, but its practical application is hindered by the poor electronic conductivity and difficulty in structure regulation. Herein, we adopt the phytic acid (PA) as a new phosphorus source to chelate VO 2+ and Na + /F − ions under hydrothermal condition, leading to the successful fabrication of cuboid-like NVOPF with average length of 1.96 μm, while introduction of citric acid (CA) results in the formation of truncated cube-like NVOPF with uniform and smaller average length of 0.81 μm, which exhibits enhanced reaction kinetics and superior sodium storage performance. To overcome the poor conductivity of NVOPF, reduced graphene oxide (rGO) nanosheets are introduced during hydrothermal synthesis, leading to the formation of rGO-wrapped NVOPF microcubes (NVOPF/rGO) with tunable rGO contents. The optimized NVOPF/rGO demonstrates significantly improved electronic conductivity and excellent sodium storage performance, displaying a theoretically high reversible capacity of 130.3 mAh g −1 at 0.2C and outstanding cycling stability with a capacity retention of 100.0 mAh g −1 after 3500 cycles at 10C (corresponding a decay rate of 0.0043% per cycle). Operando synchrotron analysis reveals that Na 3 (VO) 2 (PO 4 ) 2 F undergoes complete solid solution reaction with V 4+ /V 5+ redox couples upon sodiation/desodiation, and the Na 3 (VO) 2 (PO 4 ) 2 F displays highly reversible lattice parameters with a small overall volume change of 2.28%, which almost completely recovers with a negligibly variation of 0.038%, indicating the robust structure stability of NVOPF. Moreover, the full cell with NVOPF/rGO cathode and hard carbon anode also demonstrates superior cycling stability for practical application.
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DOI
PubMed
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Xiaoting Zhang,Yu Qiu,Xiaohui Guo,Jing Chang,Yantu Zhang,Jiangbo Cao,Yiwei Jiang,Jiale Bai,Wei Wang,Jianan Tian,Xueli Li
The exploitation of highly active, cheap cost and durable electrocatalyst for acidic water oxidation reaction still presents a major technological and scientific challenge in proton exchange membrane water electrolysers (PEMWEs). Herein, a hybrid aerogel of oxygen defect-rich RuO 2 nanoparticles coupling with carbon (V O -RuO 2 @CA) was designed to promote their activity and stability during acid water oxidation. The optimized V O -RuO 2 @CA achieves an ultralow overpotential of 207 mV at 10 mA cm −2 for acidic water oxidation and sustains a prominent long-term stability during the 30 h chronopotentiometry test in 0.5 M H 2 SO 4 . Furthermore, V O -RuO 2 @CA exhibits high mass activities of 186.5 mA mg Ru −1 and TOF values of up to 2.07 s − 1 at an overpotential of 300 mV, being 17.7 and 4.8 times higher than commercial RuO 2 , respectively. Theory calculations and experimental results verify that the oxygen vacancies (V O ) could significantly weaken the binding energy of O* with respect to OOH* for the interfacial Ru centers between RuO 2 and carbon, rendering the increase of the intrinsic water oxidation activity and resistance to over-oxidation for RuO 2 . This research provides a novel pathway to explore remarkably efficient 3D porous hybrid aerogel electrocatalysts toward anodic electrocatalysts applications in PEMWEs.
研究领域:
材料科学
·
电化学
·
催化科学
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产品关联
DOI
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2022
·Vol. 55
·期 27
·274001
·
IF 3.409
Lei Deng,Dongxu Yu,Ge Sun,Xinyuan Zhang,Chunzhong Wang,Ruiyuan Tian,Fei Du
V-based materials have attracted wide attention as high-capacity cathode materials for aqueous batteries owing to their unique structures. However, much effort should be made to increase the rate performance and solve the issue of fast capacity fading to meet the ever-growing need for low-cost and safe energy-storage devices. Herein, a novel S/VOx composite is synthesized via a very simple in-situ electrochemical-induced phase transition from VS4. The as-prepared composite electrode can deliver an initial discharge capacity of 376 mAh g−1 at a current density of 0.05 A g−1, much higher than that of VS4 (150 mAh g−1). Moreover, it shows a good discharge capacity of 260 mAh g−1 at 2 A g−1 with a retention of ∼100% over 2000 cycles, indicating an impressive electrochemical stability. The outstanding Zn2+ storage performance could be attributed to the characteristics of the composite's unique structure, highly reversible electrochemical reactions, and fast Zn2+ transport.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Ruofan Shen,Yanyan Liu,Hao Wen,Tao Liu,Zhikun Peng,Xianli Wu,Xianghong Ge,Sehrish Mehdi,Huaqiang Cao,Erjun Liang,Jianchun Jiang,Baojun Li
High activity catalysts used for eliminating the energy barrier in water breaking-up are of great significance for accelerating those reactions retarded by water molecules dissociation. In this work, an oxygen vacancy (V O )-Ti ensemble engineering on Ru catalyst was established to boost the catalytic activity toward water dissociation. The V O in V O -Ti ensemble plays as electron promoter to transfers electrons to surface Ru atoms. The rich electron state of Ru boosts the catalytic activity toward water dissociation. As an experimental verification, the turnover frequency of 1.5-RTV O -4 in ammonia borane hydrolysis reaches up to 1370 min −1 (9710 min −1 depend on the dispersion of Ru), exceeding the benchmark value set up by Ru-based catalysts. This research provides a novel electronic tuning strategy for V O as imaginary atom via electron promoter effect to enhance the intrinsic catalytic activity of metal catalysts toward inert molecule dissociation in the next generation energy chemistry field.
研究领域:
催化
·
材料科学
·
能源化学
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DOI
高影响因子
Journal of Physical Chemistry Letters
·
2024
·
IF 4.8
Qinlong Chen,Lina Gao,Tingyu Liu,Alessandro Marchetti,Juner Chen,Huilin Pan,Xueqian Kong
Na superionic conductor (NASICON)-type Na3(VO)2(PO4)2F (NVOPF) exhibits excellent cycling stability for high-voltage sodium ion batteries. Various strategies have been developed to form ion-exchanged NVOPF which can enhance the ionic and electronic conductivity. However, the underlying ion transport mechanism and complex structural transitions during battery operation remained uninvestigated. In this work, we prepared lithium-exchanged NVOPF (namely NLVOPF) which shows improved ionic conductivity and increased capacity at high discharging rates. Solid-state nuclear magnetic resonance (SSNMR) revealed the distinctive presence of two kinds of Li-exchanged sites in the NLVOPF, which are attributed to the occupied lithium ions at the Na1 and Na2 sites (namely Li1 and Li2, respectively). The Li1 site was metastably replaced in the first cycle, yet the Li2 site participated in ion insertion/extraction in the subsequent cycles. Our characterizations show that the dynamic doping of lithium in NLVOPF could contribute to the improved cycling stability and capacity retention.
研究领域:
材料科学
·
电化学
·
储能技术
·
固态化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xinmiao Nie,Xue Zhong,Fan Yang,Rongguo Wang,Xiaodong He,Wenbo Liu
Real-time detection of harmful gases at room temperature has become a serious problem in public health and environmental monitoring. Two-dimensional materials with semiconductor properties BiOCl is a promising gas-sensitive material due to its large specific surface area and adjustable band gap as well as outstanding safety characteristics. However, limited by the weak gas adsorption sites and sluggish charge-transfer ability, the performance of BiOCl could not be fully exploited. Oxygen vacancy (Vo) engineering can introduce lattice defects, thereby significantly increasing the local charge density and enhancing the adsorption of gases, which is an effective strategy to enhance the gas-sensing performance. In this work, we composite BiOCl with a vacancy (Vo-BiOCl) and reduced graphene oxide (rGO) to construct a Vo-BiOCl/rGO heterostructure with enhanced gas adsorption sites. Experimental and theoretical calculations show that Vo can enhance the adsorption of gases and the introduction of rGO forms a high-quality heterostructure with BiOCl, which can effectively reduce the band gap of BiOCl and promote electron transfer, thereby improving the sensitivity of the sensor. Benefiting from above, Vo-BiOCl/rGO achieves the ability to detect low concentrations of NO2/NH3 at room temperature, with high sensitivity (55% at 1 ppm of NO2 and −28% at 1 ppm of NH3), fast response time (40 s at 1 ppm of NO2 and 2 s at 1 ppm of NH3), good stability (over 150 days), and fully recoverable gas sensitivity.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Changxu Qin,Jiaming Liu,Hongchang Hu,Jiahui Zhan,Haotian Wang,Yinghao Gu,Xueer Ouyang,Gang Luo,James H. Clark,Shicheng Zhang
Plastic pollution, particularly from recalcitrant polystyrene (PS), poses a severe challenge to environmental sustainability. Here, we report a solvent-assisted catalytic strategy for addressing this issue. First, leveraging the tunable surface chemistry of spinel structures, we designed and synthesized a defective ZAS-16(Vo) catalyst. Its abundant oxygen vacancies effectively modulate the surface acid–base properties, creating concentrated and well-matched Lewis acid–base sites. Subsequently, with the cooperation of a solvent, this system achieves remarkable depolymerization performance, with 98.82 wt % conversion and 76.21 wt % yield of styrene. In this process, the Lewis acid sites of the catalyst initiate C–C bond cleavage, while the base sites stabilize key intermediates and steer the reaction along the desired pathway. The solvent not only provides sufficient solubility to promote polymer disentanglement but also significantly enhances the chain mobility of PS, thereby creating a favorable environment for catalytic reactions. Finally, by combining in situ characterization with molecular dynamics simulations, we elucidate the reaction mechanism at the molecular level, offering new insights into closed-loop chemical recycling of plastics.
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DOI
高影响因子
Journal of Materials Chemistry A
·
2026
·
IF 9.2
Chaoxuan Wang,Zeqi Liu,Hao Wang,Ying Sha,Jianshu Wang,Junhan Jia,Yi Du,Wuzhao Li,Lei Qian
With its special one-dimensional tunnel structure, VO₂ stands out as a highly promising cathode material for aqueous zinc-ion batteries (AZIBs). However, its intrinsically low electronic conductivity and pronounced structural degradation hinder its practical application. In this work, controllable doping of VO₂ with I⁻ was successfully achieved via a one-step hydrothermal method. It was found that I⁻ induced the evolution of VO₂ from disordered clusters to highly ordered nanoflower-like spheres. Meanwhile, lattice incorporation of I⁻ leaded to an expansion of the tunnel spacing and induced the enrichment of oxygen vacancies. The resulted amorphous hybrid structure accommodated the local strain associated with repeated Zn²⁺ insertion and extraction. In addition, I⁻ doping facilitated the valence transition from V⁴⁺ to V³⁺, optimizing the intrinsic electronic structure and charge-transfer kinetics of the material.The multiscale routes including morphology, crystal structure, and electronic states synergistically enhanced the electrochemical performance of the VO₂ cathode. The optimized IVO-30 electrode delivered a high specific capacity of 543.6 mAh g⁻¹ at 0.5 A g⁻¹, retained 87.3% of its capacity even at a high rate of 10 A g⁻¹ and exhibited near-100% Coulombic efficiency along with excellent structural stability. This work provides new insights for design of high-performance cathode materials for AZIBs.
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2025
·
IF 4.7
Manfang Mai,Lianke Ma,Yulan Zhou,Side Fu,Wenhao Deng,Xiaowen Wang,Xinzhou Ma
To overcome the rapid charge recombination and sluggish water oxidation kinetics, FeOOH/V O -BiVO 4 photoanodes were rationally prepared. The highest photocurrent density of 3.5 mA cm −2 was generated by the FeOOH/V O -BiVO 4 photoanodes at 1.23 V RHE , which was 3.5-fold higher than that of the pristine BiVO 4 . The dominate enhancement mechanism can be ascribed to significantly increased charge transfer efficiency by the FeOOH overlayers. Intensity-modulated photocurrent spectroscopy revealed that such increased charge transfer efficiency was resulted from the strong suppression of surface recombination by the FeOOH overlayers. Rate constant of surface recombination was strongly reduced to approximately 10 −2 s −1 at 0.93–1.23 V RHE . The strongly suppressed surface recombination was attributed to the storage capacity of the FeOOH for the photogenerated holes. Meanwhile, oxygen vacancies just had a minor impact on the kinetics of charge transfer and surface recombination but slightly increased the charge separation efficiency in the bulk. This work clarifies the roles of oxygen vacancies and the FeOOH overlayers in the increased photocurrent density, facilitating the rational design of high-performance BiVO 4 -based photoanodes.
研究领域:
光电化学
·
材料科学
·
水分解
·
半导体电极
·
光谱学
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DOI
高影响因子
ChemCatChem
·
2015
·Vol. 7
·期 9
·1470-1477
·
IF 4.556
Fenghua Xu,Zehui Zhang
Graphical Take baby steps: Polyaniline-grafted vanadyl acetylacetonate shows high catalytic activity for the oxidation of 5-hydroxymethylfurfural (HMF) under atmospheric oxygen pressure. A high HMF conversion of 99 % and a 2,5-diformylfuran (DFF) yield of 86 % are obtained after 12 h. More importantly, the synthesis of DFF directly from fructose is also realized with two binary catalysts: Amberlyst-15 and polyaniline–vanadyl acetylacetonate. Herein, polyaniline-grafted vanadyl acetylacetonate [VO(acac) 2 ] was prepared and used as an effective catalyst for the oxidation of 5-hydroxymethylfurfural (HMF) under atmospheric oxygen pressure. A high HMF conversion of 99.2 % was obtained after 12 h at 110 °C, and 2,5-diformylfuran (DFF) was obtained in 86.2 % yield. More importantly, the one-pot conversion of fructose into DFF was also realized with two binary catalysts: Amberlyst-15 and polyaniline–VO(acac) 2 . Amberlyst-15 was used for the acid-catalyzed dehydration of fructose into HMF, followed by the in situ oxidation of HMF catalyzed by polyaniline–VO(acac) 2 . DFF could be obtained in a yield of 42.1 % from fructose by using the one-pot reaction, whereas two consecutive steps gave a higher DFF yield of 71.1 %. Owing to the facile catalyst preparation and low cost, this method showed a promising potential for the synthesis of DFF from abundant carbohydrates.
研究领域:
化学工程
·
催化反应
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2025
·Vol. 172
·期 5
·050532
·
IF 3.3
Xin-Ming Fan,Ke-Bo Lin,Pei-Yao Li,Jia-Feng Zhang,Ling-Jun Li,Jie-Xi Wang,Xia-Hui Zhang,Jun-Chao Zheng
The exponentially growing global demand for lithium resources has accelerated the development of sodium-ion batteries (SIBs) as a promising alternative to conventional lithium-ion batteries. In this work, we successfully synthesized a novel open-framework layered material, Na2[(VO)2(HPO4)2(C2O4)] (designated as NaVPC), through an eco-friendly one-step hydrothermal method that eliminates energy-intensive post-calcination processes. The unique architecture of NaVPC features (1) three-dimensional ion diffusion channels enabling reversible Na+ extraction/insertion, (2) minimal lattice contraction (<3%) during cycling, and (3) an exceptional average operating voltage of 3.8 V vs Na+/Na. When composited with single-walled carbon nanotubes, the hybrid electrode delivers enhanced electrochemical performance, achieving a specific capacity of 80.6 mAh g−1 at 0.1 C and maintaining 91.7% capacity retention after 100 cycles at 2 C. Through a combination of ex situ X-ray diffraction, X-ray photoelectron spectroscopy, and density functional theory calculations, we systematically investigated the structural evolution and Na+ migration mechanism, establishing a fundamental framework for understanding the charge storage behavior in this open-framework material.
研究领域:
材料科学
·
能源存储与转换
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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）