Science Advances
·
2024
·Vol. 10
·期 20
·
IF 11.7
Huashuai Hu,Zhaorui Zhang,Lijia Liu,Xiangli Che,Jiacheng Wang,Ye Zhu,J. Paul Attfield,Minghui Yang
The ocean, a vast hydrogen reservoir, holds potential for sustainable energy and water development. Developing high-performance electrocatalysts for hydrogen production under harsh seawater conditions is challenging. Here, we propose incorporating a protective V2O3 layer to modulate the microcatalytic environment and create in situ dual-active sites consisting of low-loaded Pt and Ni3N. This catalyst demonstrates an ultralow overpotential of 80 mV at 500 mA cm−2, a mass activity 30.86 times higher than Pt-C and maintains at least 500 hours in seawater. Moreover, the assembled anion exchange membrane water electrolyzers (AEMWE) demonstrate superior activity and durability even under demanding industrial conditions. In situ localized pH analysis elucidates the microcatalytic environmental regulation mechanism of the V2O3 layer. Its role as a Lewis acid layer enables the sequestration of excess OH− ions, mitigate Cl− corrosion, and alkaline earth salt precipitation. Our catalyst protection strategy by using V2O3 presents a promising and cost-effective approach for large-scale sustainable green hydrogen production.
研究领域:
材料科学
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能源技术
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催化化学
✓ 已验证
DOI
PubMed
高影响因子
Materials Today Communications
·
2021
·
IF 3.383
Yaxiong Tian,Gongshu Wang,Lin Zhu,Huaxia Chen,Ting Sun
The morphology and structural engineering of V 2 O 3 anode of lithium-ion batteries plays a significant role in improving the energy storage performance since V 2 O 3 material suffers from tremendous volume changes, self-aggregation and intrinsic poor conductivity. In this work, we devise a novel 3D self-supporting N, C doped-V 2 O 3 (NC@V 2 O 3 ) composite, which consist of nanoparticles by adding urea to obtain 3D flower-like V 2 O 3 microspheres precursor during the annealing process. The V 2 O 3 microspheres self-assembled with nanosheets is fabricated by one-step solvothermal route. A possible morphological evolution mechanism of fabrication of granular NC@V 2 O 3 is explored by SEM and TEM. As anode in Li + batteries, NC@V 2 O 3 material exhibits outstanding rate performance of 227 mAh g −1 at the current density of 2 A g −1 and a reversible capacity of 272 mAh g −1 at 0.1 A g −1 after 200 cycles. Such great performance is attributed to granulated NC@V 2 O 3 architecture, which increasing the contact area of electrode-electrolyte and shortening Li + diffusion pathway. In addition, the doped N and C atoms can create more defects, providing electrochemical active sites and electronic conduction. The achievements of this study may provide new insight into design novel architecture of V 2 O 3 anode.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jie Zhao,Yuyan Zhao,Wen-ce Yue,Xue Li,Ning Gao,Yu-jiao Zhang,Chao-quan Hu
The shuttle effect caused by soluble lithium polysulfides (LiPSs) hinders the practical application of lithium–sulfur batteries. The sluggish reaction kinetics of LiPSs results in rapid capacity decay. In this work, we constructed a free-standing multifunctional interlayer decorated with V 2 O 3 /VN catalysts to suppress the shuttle effect and boost the redox reaction kinetics. The introduction of VN with strong chemical adsorption improves the conductivity of V 2 O 3 , which is beneficial for the kinetics of conversion reaction. In addition, the micro/mesopores inside the structure not only facilitate ion diffusion but also buffer the volume change of the sulfur cathode during the cycling process. Benefiting from the synergistic effects, the fabricated cells exhibit a high specific capacity of 1419.5 mAh g −1 at 0.1C. The cell with V 2 O 3 /VN/C exhibits a promising cycling performance over 1000 cycles with a decay rate of 0.037% per cycle at 1C. The synergistic effects of electrocatalysts and conductive carbon material provide inspiration on the development of high-performance Li–S batteries.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2023
·
IF 5.7
Tao Zhang,Guiqing Zhang,Zuoying Cao,Mingyu Wang,Wenjuan Guan,Shengxi Wu,Qinggang Li
Background The NH 3 , a clean reductant, generated by the thermolysis of NH 4 VO 3 , is not effectively utilized in the conventional process of vanadium metallurgy. Additionally, the preparation process of V 2 O 3 is both long and costly. Ammonia recovery is essential to prevent environmental issues resulting from ammonia release. By direct thermolysis of NH 4 VO 3 and effectively utilizing of active NH 3 , it is possible to achieve the short flow and green process for the production of V 2 O 3 . Method In an open NH 3 atmosphere, one end of the flange was connected to the liquid ammonia gas cylinder, while the other end was connected to the tail gas absorber. Furthermore, in a closed NH 3 atmosphere, both ends of the tube furnace were sealed with flanges, and the initial atmosphere in the tube was pre-injection NH 3 . The products of NH 4 VO 3 thermolysis were characterized using various techniques, including XRD, FT-IR, ICP-OES, SEM, XPS, and TG. Significant finding The thermolysis process of NH 4 VO 3 with pre-injection of NH 3 under the sealed condition was a simulation of the continuous production process of V 2 O 3 using a rotary kiln in industrial production. The rational utilization of ammonia resulted in the reduce of energy consumption, extra reductant consumption, and significant NH 3 emissions compared to the traditional V 2 O 3 production process. It was observed that V 2 O 3 was easily obtained through the thermolysis of NH 4 VO 3 with pre-injection of NH 3 under the sealed condition at 600 °C for 3 h, using a dosage of NH 4 VO 3 ranging from 2 g to 10 g. During this process, the NH 4 VO 3 went through the phase transition as follows: NH 4 VO 3 →NH 4 V 3 O 8 →(NH 4 ) 0.38 V 2 O 5 →V 6 O 13 →VO 2 →V 4 O 7 →V 3 O 5 →V 2 O 3 , and the relevant characterization of products showed that the V 2 O 3 obtained was qualified. These experimental results were of great significance to the industrial practice of vanadium metallurgy. Based on these results, short flow and green process of V 2 O 3 could be achieved in industry by partially improving the calcination process of NH 4 VO 3 in large-scale rotary kilns.
研究领域:
冶金学
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材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2023
·Vol. 13
·期 4
·659
·
IF 3.9
Yuxin Wang,Yinxiu Jin,Minghan Jia,Hu Ruan,Xuefen Tao,Xuefeng Liu,Guang Lu,Xiaodong Zhang
CeVO4-V2O3composites were prepared by simple hydrothermal method, and the effects of ethylene glycol(EG) on the products were studied by XRD, N2adsorption–desorption, SEM, EDS, XPS, PL and UV-vis spectra. The characterization reveals a slight decrease in surface area and a slight enhancement of visible light absorption in the final sample, while the crystalline phase, morphology and separation efficiency of the collective carriers are severely affected by the EG. At the same time, the photocatalytic effect of CeVO4-V2O3composites was evaluated by the degradation rate of methylene blue (MB) under simulated visible light. The sample for 10 mL EG obtained the highest efficiency of 96.9%, while the one for 15 mL EG showed the lowest efficiency of 67.5% within 300 min. The trapping experiments and ESR experiment showed that the contribution of active species to the photocatalytic degradation of MB was ∙OH > h+> ∙O2−in descending order, and a possible degradation mechanism was proposed.Keywords:ethylene glycol;CeVO4-V2O3;methylene blue oxidation;visible light
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Bin Xiao,Bao Zhang,Lin-bo Tang,Chang-sheng An,Zhen-jiang He,Hui Tong,Wan-jing Yu,Jun-chao Zheng
V 2 O 3 is a promising anode material and has attracted the interests of researchers because of its high theoretical capacity of 1070 mAh g −1 , low discharge potential, inexpensiveness, abundant sources, and environmental friendliness. However, the development and application of V 2 O 3 have been hindered by the low conductivity and drastic volume change of V 2 O 3 composites. In this work, V 2 O 3 /reduced graphene oxide (rGO) nanocomposites are successfully prepared through a facile solvothermal method and annealing process. In this synthesis protocol, V 2 O 3 nanoparticles (NPs) are encapsulated by rGO. This unique structure enables rGO to inhibit volume changes and improve the ion and electronic conductivity of V 2 O 3 . In addition, V 2 O 3 NPs, which exhibit sizes of 5–40 nm, are uniformly dispersed on rGO sheets without aggregation. The Li + storage behavior of V 2 O 3 /rGO is systematically investigated in the potential range 0.01–3.0 V. The V 2 O 3 /rGO nanocomposite can achieve a high reversible specific capacity of 823.4 mAh g −1 under the current density of 0.1 A g −1 , and 407.3 mAh g −1 under the high current density of 4.0 A g −1 . The results of this study provide insight into the fabrication of rGO-based functional materials with extensive applications.
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
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 21
·5579-5589
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IF 7.779
Shiyu Yang,Ruizi Li,Zhentao Nie,Hongjian Zhang,Yu Zhang,Jixin Zhu
2D N-doped V2O3 (N-V2O3) nanosheets were fabricated as anode materials for Li-ion batteries by a facile sol–gel method and a subsequent deoxidation–nitridation strategy. Benefiting from the 3D V–V tunnel structure, sufficient active sites and nitrogen modifications, N-V2O3 nanosheets exhibit improved Li+ diffusion kinetics, robust structure and enhanced conductivity. As a result, N-V2O3 nanosheets show a high specific capacity, long cycling life and high rate capability (136 mA h g−1 even after 1000 cycles at 2 A g−1) as anode materials for Li-ion batteries. It is instructive to note that the efficient Li+ storage of N-V2O3 is dominated by intercalation pseudocapacitance. In the mechanism of intercalation pseudocapacitance, lithium ions are intercalated into the 3D V–V tunnels and adsorbed to the V–O active sites without crystalline phase transition. This mechanism combines long cycling life with short charging/discharging times, which is suitable for stable and ultrafast Li-ion storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xiangjie Chen,Qingquan Kong,Xiaoqiang Wu,Xuguang An,Jing Zhang,Qingyuan Wang,Weitang Yao
Aqueous zinc-ions batteries (AZIBs) are expected to be a new green energy storage devices due to the low cost and safety. As classic cathode materials for AZIBs, layered vanadium oxides have excellent redox activity and large capacity performance. However, it not only has poor conductivity, but easily dissolved during (dis)charge process. Therefore, it is necessary to modify vanadium oxide to improve electrochemical performance in AZIBs. Herein, we successfully synthesized V 2 O 3 with carbon shell (V 2 O 3 @C) by the reduction reaction of carbon with V 2 O 5 in an oxygen-free environment and tested its electrochemical performance. By exploiting the effect of different calcination temperatures on the carbon reduction reaction, V 2 O 3 @C nanospheres with different carbon shell thicknesses were successfully synthesized. After fitting the experimental data, the calcination temperature for optimal electrochemical performance was determined to be 800 ℃ (VC-800). Detailly, the capacities of V 2 O 3 @C obtained at 700, 800 and 900 ℃ in the first 100 cycles at 0.5 A/g were 454.5, 400.7 and 325.1 mAh/g, respectively. Furthermore, the obtained VC-800 showed 126 % capacity retention after 10,000 cycles at 10 A/g. In the presence of carbon shell, V 2 O 3 maintains the reversible redox valence characteristics while improving the conductivity and cycle life. This work may broaden ideas in improvement of vanadium-based materials for zinc ion storage.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Wentao Wang,Xiang Li,Ruyi Wang,Jingjing Wang,Hongxia Deng,Shanshan Tong
The scarcity and economic importance of gold has motivated the researchers to develop novel and efficient adsorbents to the increase of recycling from secondary waste streams. In this work, the three-dimensional (3D) Ti 3 C 2 MXene-POSS/V 2 O 3 @C aerogel (MPVA) with orderly network structure was fabricated by the interfacial assembly of MXene and freezing-induced preassembly. The new MPVA hybrid exhibited ultrafast kinetics (only 10 min to reach equilibrium), selectivity, and excellent trapping capacity for Au (III) , owing to the reductive capture mechanism. The Langmuir model was used to describe the capture of Au (III) delivered by MPVA, achieving the maximum capture capacity of 1425.4 mg g −1 at 298 K. Moreover, MPVA displayed extremely high trapping efficiency (>99.9%) at 273 K, which suggests that this composite is promising for capturing Au (III) in cold temperatures. MPVA also shows good reusability after ten cycles. The results indicate that MPVA has great potential for efficient capturing from complex and cold aqueous solutions.
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
ACS Nano
·
2020
·
IF 14.588
Hao Luo,Bo Wang,Fei Wang,Jing Yang,Fangdong Wu,Yu Ning,Yu Zhou,Dianlong Wang,Huakun Liu,Shixue Dou
The lack of suitable cathodes is one of the key reasons that impede the development of aqueous zinc-ion batteries. Because of the inherently unsuitable structure and inferior physicochemical properties, the low-valent V2O3 as Zn2+ host could not be effectively discharged. Herein, we demonstrate that V2O3 (theoretical capacity up to 715 mAh g–1) can be utilized as a high-performance cathode material by an in situ anodic oxidation strategy. Through simultaneously regulating the concentration of the electrolyte and the morphology of the V2O3 sample, the ultraefficient anodic oxidation process of the V2O3 cathode was achieved within the first charging, and the mechanism was also schematically investigated. As expected, the V2O3 cathode with a hierarchical microcuboid structure achieved a nearly two-electron transfer process, enabling a high discharging capacity of 625 mAh g–1 at 0.1 A g–1 (corresponding to a high energy density of 406 Wh kg–1) and cycling stability (100% capacity retention after 10 000 cycles). This work not only sheds light on the phase transition process of low-valent V2O3 but also exploits a method toward design of advanced cathode materials.
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 ALLOYS AND COMPOUNDS
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2018
·
IF 3.779
Changmeng Huan,Xinyue Zhao,Xiudi Xiao,Yuan Lu,Shuai Qi,Yongjun Zhan,Lingzhi Zhang,Gang Xu
In this work, the V 2 O 3 nanoparticles (NPs) with ultrathin carbon shells were synthesized by a facile solvothermal process. The V 2 O 3 NPs were about 30 nm and contained a carbon shell of about 2 nm thick. The V 2 O 3 NPs were homogeneously dispersed and loosely packed. When used as anode material , the V 2 O 3 core-shell NPs showed a reversible capacity up to 525 mA h g −1 at 200 mA g −1 over 200 cycles with good cycle stability and rate capability. The excellent electrochemical performance promotes its practical application in lithium-ion batteries.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 3
·037504
·
IF 4.386
Tiantian Qiu,Na Luo,Mengmeng Guo,Haijie Cai,Zhixuan Cheng,Jiaqiang Xu
Constructing porous structure has proved to be an effective strategy to improve the gas sensing properties of metal oxide semiconducting materials. In this work, high-performance hydrogen sulfide (H2S) gas sensing material with porous structure were synthesized by growing nickel oxide (NiO) on vanadium trioxide (V2O3) seeds. Morphology and structure characterizations reveal that the novel three-dimensional (3D) nanoflowers are formed by self-assembling two-dimensional (2D) porous nanosheets with high surface area and abundant active sites. Compared with pristine NiO, the sensing performance of V2O3-NiO (VN8, VN7, VN6) with different ratios of V3+: Ni2+ is enhanced due to their porous structure. Among them, VN7 sensor shows excellent sensing properties at 200 °C. The response to 500 ppb H2S can reach 65, which increases as high as 2.2 times compared with the pristine NiO sensor. The response time to 500 ppb H2S is further decreased from 13 s of the pristine NiO sensors to 8 s of VN7 sensor. The VN7 sensor also shows a wide linear range from 20 ppb to 500 ppb, high selectivity, good repeatability, long-term stability, moisture resistance and low detection limit (20 ppb), indicating its potential candidate for ppb-level H2S detection in complex environment of industrial mine.
研究领域:
材料科学
·
传感器技术
✓ 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）