SCRIPTA MATERIALIA
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2024
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IF 5.3
Lingjiang Kou,Yong Wang,Jiajia Song,Taotao Ai,Wenhu Li,Mohammad Yeganeh Ghotbi,Panya Wattanapaphawong,Koji Kajiyoshi
The development of efficient and cost-effective electrocatalysts for hydrogen evolution reaction (HER) is an urgent requirement but formidable challenge. In this work, Co and Mn were introduced into self-supported nickel-vanadium layered double hydroxide (NiV–LDH) to modulate electronic structure. The introduced Co and Mn can induce electron transfer among various cations to modulate the electronic structure, exerting a positive influence on the catalytic activity of HER. As a results, the samples with Co (NiVCo–LDH) and Mn (NiVMn–LDH) exhibits excellent HER activity. To achieve a current density of 10 mA cm –2 in 1.0 M KOH, NiVCo–LDH and NiVMn–LDH requiring overpotential of 135 mV and 123 mV, respectively. In contrast, NiV–LDH needed an overpotential of 198 mV to reach the same current density. The ideal performance of NiVCo–LDH and NiVMn–LDH offer a potential application in non-noble metal-based industrial electrolytic water splitting to produce high-purity hydrogen.
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
DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 16
·5315-5326
·
IF 4.052
Shaolei Zhao,Keyu Tao,Yun Gong
Co-Incorporated NiV2O6/Ni(HCO3)2 arrays with different morphologies can grow on nickel foam (NF) via a mild one-step hydrothermal method. Among them, S-0.5-20 and S-0.25-20 were obtained at a 1 : 1 : 20 molar ratio of Co/V/urea with 0.5 and 0.25 mmol Co(NO3)2, respectively. They demonstrate high areal capacities of 0.99 mA h cm−2 (7.94 F cm−2) and 0.56 mA h cm−2 (4.48 F cm−2) at 1 mA cm−2, respectively, which are superior to that of Co-incorporated Ni(HCO3)2/NF synthesized in the absence of Na3VO4. S-0.25-20 possesses good rate capability with 82.1% retention when the current density is increased 20-fold, and it shows superior long-term durability with 106.2% retention of the initial capacity after 10 000 charging/discharging cycles at 100 mA cm−2. These results are associated with the porous and orderly hierarchical Co-incorporated NiV2O6/Ni(HCO3)2 nanoflake arrays directly grown on the Ni foam. Moreover, due to the synergetic effect of the individual components, electrons can be transferred from V centers to Ni active sites, thus improving the stability of the vanadate. The generation of more active species, such as Co3+, during cycling could account for the increased capacity. A S-0.25-10//activated carbon (AC) asymmetrical supercapacitor shows a high energy density of 0.533 mW h cm−2 at a power density of 0.232 mW cm−2 (0.415 mW h cm−2 at 4.983 mW cm−2). Furthermore, the formation mechanism of the Co-incorporated NiV2O6/Ni(HCO3)2 nanoflake arrays is proposed.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL PROCESSING TECHNOLOGY
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2015
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IF 3.352
Hui Shang,Yu Liu,Jin-Chun Shi,Quan Shi,Wen-Hui Zhang
Most crude oils contain traces of metal complexes, among which vanadium (V) and nickel (Ni) compounds are the most harmful poisons to the catalysts of fluid catalytic cracking (FCC) and hydrogenation units. These metals are proven to be extremely hard to remove, since they exist in crude oil as stable oil-soluble complexes. The microwave technology provides a new way for Ni/V removal, their removal efficiency using chemical reagents and the mechanism of microwave-assisted demetallization were studied in this paper. It was concluded that the demetallization efficiency can be highly enhanced under microwave irradiation . There is no specific structural selectivity for vanadium porphyrins during microwave treatment process. The demetallization agent — methanesulfonic acid , containing a sulfonyl acid group was found to react with VO 2 + and Ni 2 + . Ni and V were removed from porphyrin ring without destroying the ring structure, corresponding water soluble inorganic salts were formed, thus can be successfully separated from crude oil by washing or desalting process.
研究领域:
化学工程
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石油加工
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2024
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IF 3.7
Liping Zhong,Hai Wang,Yanqi Xu,Cunjun Li,Limei He,Xin Wang,Linjiang Wang
Layered double hydroxides (LDHs) are promising electrode materials for supercapacitors due to their favorable faradaic pseudocapacitance, abundant slabs, high flexibility to ion exchange and tunable chemical composition. However, these materials' slow charge transfer rate, small specific surface area, and restricted availability of exposed electroactive sites hinder their electrochemical capabilities. Metal-organic frameworks (MOFs) are frequently employed as a template for the synthesis of LDHs with tailored morphology, hence enhancing the functional properties of these materials. This study successfully created two-dimensional (2D) ultra-thin NiV-LDH nanosheets with specific oxygen vacancies (Vo) by carefully choosing a template and intentionally introducing Vo. After undergoing optimal etching operations, the surface electronic environment of V was changed, and a certain concentration of Vo was produced. As a result, the Ni-based NiV-LDH electrodes, with their electroactive metal components (Ni and V) and their synergistic interactions, demonstrated increased specific capacity. This increase was additionally supported by enhanced charge and ion transfer, improved conductivity, and greater availability of exposed electroactive sites. Among all, the NiV-LDH-60 ℃ sample showed a substantial increase in specific surface area and achieved a peak specific capacitance of 2133 F g -1 when assessed at a current density of 1 A g -1 . Furthermore, the material exhibited an impressive cycling stability of 82.8% after undergoing 2000 cycles at a significant current density of 10 A g -1 . The energy density of the asymmetric supercapacitor (ASC), employing NiV-LDH-60 ℃ as the cathode and activated carbon (AC) as the anode, was 24.3 Wh kg -1 while operating at a power output of 750 W kg -1 . Overall, these findings contribute to a novel perspective on the synthesis of LDHs for supercapacitors, offering insights into how the morphology and electronic properties of these materials can be tailored to enhance their performance in energy storage applications.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 15
·3642
·
IF 4.2
Meng Guo,Jia Du,Xueguo Liu,Wentao Liu,Mingjian Zhao,Jianqi Wang,Xuyang Li
Supercapacitors (SCs) are widely recognized as competitive power sources for energy storage. The hierarchical structure of nickel vanadium sulfide nanoparticles encapsulated on graphene nanosheets (NVS/G) was fabricated using a cost-effective and scalable solvothermal process. The reaction contents of the composites were explored and optimized. TEM images displayed the nickel vanadium sulfide nanoparticles (NVS NPs) with 20–30 nm average size anchored to graphene nanosheets. The interconnection of graphene nanosheets encapsulating NVS nanoparticles effectively reduces the ion diffusion path between the electrode and electrolyte, thereby enhancing electrochemical performance. The NVS/G composite demonstrated improved electrochemical performance, achieving a maximum of 1437 F g−1specific capacitance at 1 A g−1, remarkable rate capability retaining of 1050 F g−1at 20 A g−1, and exceptional cycle stability with 91.2% capacitance retention following 10,000 cycles. The NVS/G composite was employed as a cathode, and reduced graphene oxide (rGO) was used as an anode material to assemble a device. Importantly, asymmetric SCs using NVS/G//rGO achieved 74.7 W h kg−1energy density at 0.8 kW kg−1power density, along with outstanding stability with 88.2% capacitance retention following 10,000 cycles. These superior properties of the NVS/G electrode highlight its significant potential in energy storage applications.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Shaoyan Zhang,Guojie Li,Juan Pei,Yaoran Sun,Kun Wang,Heng Zhang,Xiaoxia Fu,Xinyue Qi
Asymmetric supercapacitors (ASCs) have garnered significant attention as efficient and practical energy storage devices due to their high energy density and ultralong lifespan. The performance of the ASC is largely dependent on the composition and structure of electrode materials. This study introduces the synthesis of a hydrated nickel vanadate (NiV2O6·H2O) nanosheet electrode material and evaluates its electrochemical performance in supercapacitors. Notably, the NiV2O6·H2O nanosheets demonstrated a high specific capacitance of 1053.3 F g–1 at 1 A g–1 and 113.0% capacitance retention after 10000 cycles at 5 A g–1. Furthermore, an ASC assembled with NiV2O6·H2O nanosheets and activated carbon (AC) achieved a high energy density of 27.6 Wh kg–1 at a power density of 725.3 W kg–1, demonstrating its promising potential in ASC applications. Additionally, the obtained NiV2O6·H2O nanosheets were examined as an anode for lithium-ion batteries (LIBs), achieving a specific capacity of 472.4 mA h g–1 after 1000 cycles at 500 mA g–1. This work presents an approach to the design and development of electrode materials for high-performance energy storage devices.
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
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Yiguang Gai,Dong Tian,Zhishan Li,Guanghao Wang,Wenli Kang,Hua Wang,Kongzhai Li
Electroreduction of CO 2 into beneficial products is integral to attaining carbon neutrality. Herein, we detail a series of anti-perovskite nitrides InNNi 3− x V x ( x = 0, 0.2, 0.4, 0.6, 0.8) to be highly effective CO 2 RR. The InNNi 2.4 V 0.6 demonstrated exceptional conversion of CO 2 to formate, achieving an optimal Faraday efficiency (FE) of 93.6 % at −0.754 V versus RHE. It also exhibited a partial current density of 200 mA cm −2 at −1.1 V versus RHE, along with remarkable stability in an H-type cell. Electrochemical tests, X-ray absorption fine structure, and theoretical calculations demonstrated that in addition to altering InNNi 3 electronic structure, V doping results in lattice distortion in NiN 3 octahedron, increasing the lattice spacing of InNNi 2.4 V 0.6 (111) surface, exposing more active sites. This enhances its ability to adsorb the reaction intermediate *OCHO, thereby facilitating the conversion of CO 2 into formate. This research offers a viable approach for optimizing an electrocatalyst to convert CO 2 to valuable products.
研究领域:
材料科学
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电化学
·
催化反应
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Peng Zhou,Cong Wang,Yuanyuan Liu,Zeyan Wang,Peng Wang,Xiaoyan Qin,Xiaoyang Zhang,Ying Dai,Myung-Hwan Whangbo,Baibiao Huang
NiV-LDH as a novel electrode material has rarely been investigated in the energy storage field. Herein, novel ultrathin NiV-LDH was designed and synthesized, which displays high specific capacitance but poor stability. To further improve the stability, NiV-LDH was transformed to the sulfide named NiV-S through an ion exchange reaction (S 2− replaces OH − ). The obtained NiV-S maintains the ultrathin (5 nm in thickness) and porous structure, and displays higher specific capacitance (2270.4 F g −1 at 2 A g −1 ), compared to NiV-LDH (1502 F g −1 at 2 A g −1 ). What is more improtant is that the cycling stability of NiV-S is much higher than NiV-LDH, (91.9% retention after 10,000 cycles for NiV-S vs only 63% retention after 5000 cycles for NiV-LDH). The asymmetric supercapacitor assembled using ultrathin porous NiV-S as the positive electrode and activated carbon (AC) as the negative electrode was found to deliver a maximum energy density of 51 W h kg −1 at a power density of 1600 W kg −1 and 12 kW kg −1 at 23.7 W h kg −1 . In addition, 98.5% of the initial capacitance retains after 10,000 continuous cycling.
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
ACS Applied Nano Materials
·
2023
·
IF 5.9
Guiquan Liu,Guorong Wang,Zhiliang Jin
Coupling hydroxides with highly conductive materials has become an effective means to solve their conductivity and stability issues in supercapacitors. Herein, a nanoflower nickel–vanadium layered double hydroxide/graphdiyne (NiV-LDHs/GDY) compound was obtained via a two-step strategy which corrected the shortcomings of poor electrical conductivity and stability of nanoflower NiV-LDHs. The nanoflower NiV-LDHs/GDY occupies a preferable mass-specific capacitance of 1397 F g–1 (1 A g–1), rate performance of 70.01% (20 A g–1), and durability of 100.00% after 5000 cycles compared to NiV-LDHs. In addition, the NiV-LDHs/GDY//AC ASC reveals a corresponding energy density of 35.42 Wh kg–1 (at a power density of 2602.43 W kg–1), and the corresponding energy storage capacity still stays at 80.52% after 6000 cycles. The performance improvement is mainly attributed to the introduction of GDY, which improves the pore structure and charge transfer capacity of NiV-LDHs. Hence, such considerable results suggest that nanoflower NiV-LDHs/GDY could be potential candidate materials for energy storage equipment.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Huachuan Sun,Hsiao-Chien Chen,Muhammad Humayun,Yang Qiu,Jun Ju,Yumin Zhang,Mohamed Bououdina,Xinying Xue,Qingju Liu,Yuanjie Pang,Chundong Wang
Immobilizing platinum (Pt) single atoms on appropriate supports with optimized coordination environments and electronic structures is a promising strategy to address the problem of chlorine corrosion during seawater electrolysis. Herein, Pt single atoms on nickel-vanadium layered double hydroxides (Pt-SA/NiV-LDH) matrix are fabricated for chlorine tolerance hydrogen generation. Due to the strong synergetic electronic interaction between atomically dispersed Pt and the ultrathin NiV LDH matrix, the adsorption/dissociation feature of *H 2 O, *OH, and *H are optimized as evidenced theoretically. The as-fabricated Pt-SA/NiV-LDH electrode exhibits an exceptional mass activity (i.e., 30.98 times higher) compared to the commercial Pt/C, along with an ultra-high turnover frequency (TOF) value of 9.90 s −1 in alkaline media. Impressively, only 207 mV overpotential is required to yield a current density of 2000 mA cm ‒2 in an electrolyte solution containing 1 m KOH and 2 M NaCl, indicating its robust resistance to chlorine. Moreover, this kind of material demonstrates remarkably low overpotentials of 130 and 215 mV to attain the industrial-scale current densities of 1000 and 2000 mA cm −2 in alkaline seawater, accompanied by exceptional stability for 500 h working at 500 mA cm −2 . This work provides an insightful reference for the production of sustainable green hydrogen through seawater electrolysis.
研究领域:
材料科学
·
催化化学
·
能源转换
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Junjun Lv,Panpan Liu,Fei Yang,Liwen Xing,Danni Wang,Xiao Chen,Hongyi Gao,Xiubing Huang,Yunfeng Lu,Ge Wang
The development of highly efficient and low-cost bifunctional noble metal-free electrocatalysts for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is an effective strategy for improving efficiency. Herein, novel three-dimensional (3D) bimetallic metal–organic frameworks containing Ni and V with adjustable stoichiometry were synthesized on nickel foam successfully. Notably, Ni2V-MOFs@NF only require rather low overpotentials of 244 and 89 mV for the OER and HER, respectively, and expedites overall water splitting with 1.55 V at 10 mA cm–2 with robust durability during the 80 h test. The high efficiency of the novel obtained electrocatalysts should be attributed to the particular morphological design of the two-dimensional (2D) ultrathin nanosheets self-assembling into a 3D nanoflower and the electronic structure regulation resulting from the synergetic interaction between nickel and vanadium. Subsequent theoretical calculations reveal the following conclusions: (I) the exceptional electronic conductivity of Ni2V-MOFs shows enhanced optimization as a result of electronic structure reconstruction, (II) the energy barrier reduction of the rate-limiting step is responsible for the enhanced dynamics of Ni2V-MOFs for the OER, and (III) the facilitation of the adsorption of H+ and H2O plays a key role in progressing the HER catalytic activity of Ni2V-MOFs.
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
Energy Technology
·
2022
·Vol. 10
·期 11
·2200809
·
IF 4.149
Guiquan Liu,Guorong Wang,Xin Guo,Xuqiang Hao,Kai Wang,Zhiliang Jin
The charge conductivity properties and ionic delivery of pseudocapacitive materials are important factors for the charge storage process. Herein, the new petal-like S-NiV-layered double hydroxide (LDH) materials are successfully synthesized by a presynthetic solvothermal reaction and a sulfidation modification procedure. The specific capacitance of the new petal-like S-NiV-LDHs electrode reaches 1403 F g −1 when the current density is 1 A g −1 , and this is attributed to Ni 3 S 2 formed on the surface of NiV-LDHs. When the current density is up to 20 A g −1 , the rate performance of the new petal-like S-NiV-LDHs electrode is 65.04%. It can be seen that the comprehensive electrochemical performance of the new petal-like S-NiV-LDHs is better than the petal-like NiV-LDHs before modification. When the power density of the S-NiV-LDHs//activated carbon asymmetric supercapacitor cell is 2278.48 W kg −1 , its energy density is 20 Wh kg −1 . The innovation of this work lies in that, based on the microstructure of petal-like NiV-LDHs with rich mesoporous structure, the surface of petal-like NiV-LDHs is slightly sulfurized, which makes the new petal-like S-NiV-LDHs electrode material have smaller electrochemical impedance, richer oxidation states, richer chemical active sites, better energy storage, and cycle stability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）