INORGANIC CHEMISTRY
·
2018
·
IF 4.7
Fan Sun,Zhongnan Guo,Ning Liu,Dan Wu,Jiawei Lin,Erjian Cheng,Tianping Ying,Shiyan Li,Wenxia Yuan
In this work, we report the discovery of a new Ni-based quasi-one-dimensional selenide: Cs0.9Ni3.1Se3. This compound adopts the TlFe3Te3-type structure with space group P63/m, which consists of infinite [Ni3Se3] chains with face-sharing Ni6 octahedra along the c direction. The lattice parameters are calculated as a = 9.26301(4) Å and c = 4.34272(2) Å, with the Ni–Ni distance in the ab plane as 2.582(3) Å, suggesting the formation of a Ni–Ni metallic bond in this compound. Interestingly, it has been found that Cs0.9Ni3.1Se3 is nonstoichiometric, which is different from the other TlFe3Te3-type phases reported so far. Structure refinement shows that the extra Ni atom in the structure may occupy the 2c site, together with Cs atoms. Cs0.9Ni3.1Se3 shows metallic behavior with monotonously decreased resistivity with temperatures from 300 to 0.5 K. Measurements on the magnetic susceptibility display a spin-glass state below 7 K. The specific heat curve gives a Sommerfeld coefficient of 14.6 mJ·K–2·mol–1 and a Debye temperature of 143.6 K. The discovery of this new compound enriches the diversity of low-dimensional materials in a transition-metal-based family and also sheds light on the structure–property relationship of this system.
研究领域:
凝聚态物理
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Wenlan Ji,Yijiang He,Tian C. Zhang,Yuan Wang,Shaojun Yuan
The novel non-noble metal anodes of Ni-based (Co 2+ , Fe 2+ , and Mn 2+) layered double hydroxides (Ni-based LDH) were uniformly anchored on the carbon cloth (CC) surface (denoted as Ni-based LDHs/CC) by a simple, rapid and universal electrodeposition approach. The low-cost NiCo-LDH/CC anodes not only possessed superior conductivity and more exposed reactive sites, but also delivered promising electrocatalytic oxidation ability. Notably, the electrocatalytic oxidation efficiency of the obtained NiCo-LDH/CC and NiMn-LDH/CC anodes were positively correlated with the deposition amount of NiCo-LDH and NiMn-LDH, wherein NiCo-LDH-180s/CC anode delivered a significant enhancement in electrocatalytic oxidation efficiency of As(III), over 4.7 times higher than that of pure CC. Impressively, the NiCo-LDH-180s/CC anode exhibited larger electrochemical active areas and outstanding electrocatalytic activity, and can achieve nearly 100% conversion efficiency within 20 min at a current density of 6 mA/cm 2 . In particular, the developed anode is also distinguished by its adaptability to different pH values and its strong immunity to coexisting ions, which is expected to be widely applied in various As(III)-contaminated environments. Electron spin resonance spectra fully validated the formation of free radicals (•OH and •O 2 − ) with strong oxidative properties, and was employed to further investigate the associated reaction mechanism in combination with quenching experiments. This work potentially offers an in-depth perspective of electrocatalytic technology for the decontamination of highly toxic As(III) wastewater through cost-effective non-noble metal anodes and broadens the scope of electrocatalysts.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Aijuan Xie,Jie Zhang,Xiang Tao,Jianghui Zhang,Bingyan Wei,Wenhao Peng,Yuwei Tao,Shiping Luo
Nickel-based metal organic framework materials were first prepared by hydrothermal method and used as the precursor. Ni/nitrogen-carbon (Ni–N–C), Ni@NiO–N–C and NiO–N–C mixtures derived from metal organic skeleton were successfully prepared by controlling the heat treatment conditions and applied in the electrocatalytic oxygen evolution reaction (OER). Through a series of research of OER catalytic performance, OER process kinetics, and stability, the as-prepared Ni @ NiO/N–C nanowires (NW) (250 °C) with core-shell structure showed the most prominent activity. Compared with other derived mixed materials, the oxygen evolution overpotential was 390 mV at the current density of 10 mA cm −2 , and the Tafel slope was 100 mV dec −1 . Moreover, the material showed excellent stability without significant decrease of activity after a long time of testing. The detail study regarding the formation and evolution of Ni/NiO NWs is of considerable value and may offer prospects for developing highly active electrocatalysts in electrochemical energy devices.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Cuizhu Ye,Ziyi Guo,Yongfang Zhou,Yi Shen
Electrochemical nitrate (NO 3 − ) reduction reaction (NO 3 − RR) to ammonium (NH 4 + ) or nitrogen (N 2 ) provides a green route for nitrate remediation. However, nitrite generation and hydrogen evolution reactions hinder the feasibility of the process. Herein, dual single atom catalysts were rationally designed by introducing Ag/Bi/Mo atoms to atomically dispersed Ni N C moieties supported by nitrogen-doped carbon nanosheet (NCNS) for the NO 3 − RR. Ni single atoms loaded on NCNS (Ni/NCNS) tend to reduce NO 3 − to valuable NH 4 + with a high selectivity of 77.8 %. In contrast, the main product of NO 3 − RR catalyzing by NiAg/NCNS, NiBi/NCNS, and NiMo/NCNS was changed to N 2 , giving rise to N 2 selectivity of 48.4, 47.1 and 47.5 %, respectively. Encouragingly, Ni/NCNS, NiBi/NCNS, and NiAg/NCNS showed excellent durability in acidic electrolytes, leading to nitrate conversion rates of 70.3, 91.1, and 93.2 % after a 10-h reaction. Simulated wastewater experiments showed that NiAg/NCNS could remove NO 3 − up to 97.8 % at −0.62 V after 9-h electrolysis. This work afforded a new strategy to regulate the reaction pathway and improve the conversion efficiency of the NO 3 − RR via engineering the dual atomic sites of the catalysts.
研究领域:
环境科学
·
电化学
·
催化材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Liqin Wang,Bolin Liu,Youqi Zhu,Min Yang,Changliang Du,Zhanli Han,Xiuyun Yao,Xilan Ma,Chuanbao Cao
Transition-metal compounds have attracted enormous attention as potential energy storage materials for their high theoretical capacity and energy density. However, the most present transition-metal compounds still suffer from severe capacity decay and limited rate capability due to the lack of robust architectures. Herein, a general metal–organic framework-derived route is reported to fabricate hierarchical carbon-encapsulated yolk-shell nickelic spheres as anode materials for sodium-ion batteries. The nickelic metal–organic framework (Ni-MOF) precursors can be in situ converted into hierarchical carbon-encapsulated Ni 2 P (Ni 2 P/C), NiS 2 (NiS 2 /C) and NiSe 2 (NiSe 2 /C) by phosphorization, sulfuration, and selenation reaction, respectively, and maintain their yolk-shell sphere-like morphology. The as-synthesized Ni 2 P/C sample can deliver much lower polarization and discharge platform, smaller voltage gap, and faster kinetics in comparison with that of the other two counterparts, and thus achieve higher initial specific capacity (3222.1/1979.3 mAh g −1 ) and reversible capacity of 765.4 mAh g −1 after 110 cycles. This work should provide new insights into the phase and structure engineering of carbon-encapsulated transition-metal compound electrodes via MOFs template for advanced battery systems.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemElectroChem
·
2022
·Vol. 9
·期 2
·e202101523
·
IF 4.782
Junye Zhang,Hao Guo,Fan Yang,Mingyue Wang,Tingting Zhang,Hao Zhang,Wu Yang
Graphical Ni-MOF derived CMs@Ni(OH) 2 /NiSe with a core-shell structure was designed. The obtained core-shell nanostructure material possesses a high contact area, excellent synergistic effect and can provide more reactive active sites. The application of Ni-MOF in supercapacitors has received widespread attention, but its poor conductivity and bad stability hinder its application. Therefore, Ni-MOF derived CMs@Ni(OH) 2 /NiSe with a core-shell structure was designed. Here, carbon microspheres (CMs) were explored as the conductive substrate to enhance the stability and in situ prepared Ni-MOF was anchored on the surface of CMs. Then, alkali-treatment and selenylation were carried out on CMs@Ni−MOF to improve stability and conductivity. The obtained core-shell nanostructure material possesses a high contact area, excellent synergistic effect and can provide more reactive active sites. The prepared CMs@Ni(OH) 2 /NiSe shows a higher specific capacitance (2106 F g −1 ) and excellent cycling performance with a capacitance retention of 95 % after 30000 cycles. Furthermore, the assembled CMs@Ni(OH) 2 /NiSe//AC device delivers a high energy density of 70.84 Wh kg −1 at the power density of 756.8 W kg −1 and maintains 100 % of the initial capacitance after 40000 cycles.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Hongxu Zhou,Weichen Han,Hongquan Chai,Hao Huang,Jingang Zheng,Han Zhang,Lixiang Li,Weimin Zhou,Baigang An,Chengguo Sun
Sluggish reaction kinetics in lithium–sulfur (Li–S) batteries has seriously hindered their practical application. Herein, a three-dimensional (3D) granular carbon skeleton decorated with nickel-rich NCM materials (NCM@3D-SP) is prepared as a cathode host for Li–S batteries, where the carbon matrix is rich in pore channels, can provide good conductivity and electrolyte diffusion, and NCM811 particles contribute abundant metal sulfides active sites through metal-ion exsolution. The different metal sulfides (NiS, Ni3S2, Ni7S6, and CoS) in heterogeneous structures exhibit outstanding catalytic and adsorption effects on polysulfides during cycling, where the ion diffusion coefficient is increased by approximately 2.5 times compared to the cathode without catalytic active sites (3D-SP). A Li metal battery using NCM@3D-SP/S as the cathode exhibits a capacity decay of only 0.051% per cycle at 2C after 500 cycles. Even at an ultra-high current density of 10C and a sulfur-loading of 6 mg cm−2, the cells maintain a stable reversible discharge capacity of 453.1 mA h g−1 after 500 cycles and 4 mA h cm−2. The incorporation of nickel-rich cathode materials and 3D sulfur host structure presents a novel strategy for high-catalytic activity cathodes of Li–S batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 17
·6810-6817
·
IF 3.288
Yanchao Xu,Shanshan Xiong,Shuting Weng,Juan Wang,Jing Wang,Hongjun Lin,Yang Jiao,Jianrong Chen
N-Doped carbon-incorporated Ni2P/Ni was reasonably designed and synthesized from nickel-based metal organic framework (Ni-MOF) precursors via a novel simultaneous carbonization and phosphatization process. Interestingly, subtle phosphating significantly improves the energy storage performance of supercapacitors (SCs). Ni2P/Ni/C composites exhibit a good energy storage performance with a specific capacitance of 257.2 C g−1 at 1 A g−1. The corresponding hybrid supercapacitor achieves an energy density of 25.4 W h kg−1 at a power density of 750 W kg−1, ultrahigh electrochemical cyclic stability (98.2% retention after 4000 cycles) and nearly 100% coulombic efficiency with a Ni2P/Ni/C-100 positive electrode and a porous carbon negative electrode, respectively. These can be attributed to the synergetic effects of N-doped carbon and metal phosphates, which ensure good electrical conductivity and provide rich reactive sites as well as stable architecture. These results indicate that the controlled pyrolysis of MOFs is an effective method to design a kind of high-performance electrode material for hybrid supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2022
·Vol. 24
·期 20
·8014-8020
·
IF 11.034
Yahui Wei,Jingyun Jiang,Jialong Dong,Yifan Xu,Jianwei Fu,Qun Xu
Deep eutectic solvents (DESs) are burgeoning green solvents in materials chemistry; however, a lack of multifunctionality is a typical limitation for most reported DESs. Herein, we describe 8 task-specific reactive DESs (RDESs) composed of amino acids and nickel chloride hexahydrate (NiCl2·6H2O) that support the desired reactive function for fabricating Ni-based materials, preserving the cost-effectiveness and energy-efficiency properties of the one-step annealing process. The structure of amino acids in the hydrogen bonded network was studied by Fourier transform infrared spectroscopy (FT-IR). Then, the effects of chain length, functional group substitution and molar ratios on the thermodynamic stability of DESs were also explored. Finally, taking serine–NiCl2·6H2O and threonine–NiCl2·6H2O systems as examples, which were equipped with or without a methyl group, Ni and Ni@Ni(OH)2 samples were prepared by a one-step annealing process, respectively. Notably, the obtained Ni@Ni(OH)2 materials exhibited considerable oxygen evolution reaction (OER) performance in an alkaline environment. Therefore, our proposed RDESs with versatile types and functionalities will open new avenues for potential development in energy and environmental applications.
研究领域:
材料化学
·
能源科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2015
·
IF 3.368
Tiance An,Yuhang Wang,Jing Tang,Yang Wang,Lijuan Zhang,Gengfeng Zheng
A substantial challenge for direct utilization of metal–organic frameworks (MOFs) as lithium-ion battery anodes is to maintain the rigid MOF structure during lithiation/delithiation cycles. In this work, we developed a flexible, wavy layered nickel-based MOF (C 20 H 24 Cl 2 N 8 Ni, designated as Ni–Me 4 bpz) by a solvothermal approach of 3,3′,5,5′-tetramethyl-4,4′-bipyrazole (H 2 Me 4 bpz) with nickel(II) chloride hexahydrate. The obtained MOF materials (Ni–Me 4 bpz) with metal azolate coordination mode provide 2-dimensional layered structure for Li + intercalation/extraction, and the H 2 Me 4 bpz ligands allow for flexible rotation feature and structural stability. Lithium-ion battery anodes made of the Ni–Me 4 bpz material demonstrate excellent specific capacity and cycling performance, and the crystal structure is well preserved after the electrochemical tests, suggesting the potential of developing flexible layered MOFs for efficient and stable electrochemical storage .
研究领域:
材料科学
·
能源存储
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ye Tian,Shuonan Wang,Ning Liu,Qian Xue,Xueqiang Qi,Hao Liu,Andreu Cabot,Libing Liao
In this study, an ultrafast Joule heating method is employed to efficiently synthesize nickel sulfide and nickel oxide nanoparticles on buckypaper (Ni 3 S 2 -NiO@BP) as high-performance supercapacitor electrode materials. The thermal shock effect was tuned by adjusting the temperature of Joule heat through voltage regulation. The resulting composite material exhibits battery-like energy storage kinetics, boasting a specific capacity of 2278F g −1 at a current density of 1 A g −1 . Ex-situ X-ray diffraction and Raman spectroscopy measurements showed that Ni 3 S 2 -NiO gradually transforms into Ni(OH) 2 during cycling, and then to highly reactive NiOOH. Density functional theory (DFT) calculations confirm the enhanced conductivity and OH − adsorption of the heterogeneous structures. Furthermore, flexible hybrid asymmetric supercapacitors assembled from these electrodes exhibit a high energy density of 71.55 Wh kg −1 with a power density of 1124.8 W kg −1 , and stable electrochemical performance even under varying bending angles. The efficient synthesis approach presented here offers new insights into the rational design and engineering of electrode materials for high-performance, flexible supercapacitors.
研究领域:
材料科学
·
能源工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 16
·6263-6270
·
IF 8.067
Yunpeng Xu,Yue Liu,Jianyong Ye,Lizhong Wang,Sheng Zhuo,Weifan Chen
Low-cost and highly electroactive nickel-based materials are important electrodes for the development of supercapacitors. The precise modulation of the morphology and microstructure has been a crucial measure to further enhance the electrochemical performance. Herein, a three-dimensional porous nanocage NixS6/Ni(OH)2 hybrid formed by NixS6 nanoparticles anchored on Ni(OH)2 nanoflakes was creatively synthesized via a simple and scalable approach, which was based on two-time ion exchange reactions of the Mg(OH)2 precursor. Significantly, in asymmetric supercapacitors, the NixS6/Ni(OH)2 hybrid exhibits a high specific capacitance of 2726 F g−1 at a current density of 1 A g−1 and an excellent energy density of 31.31 Wh kg−1 at a power density of 62.56 W kg−1, which are superior to those of the currently reported nickel sulfide electrode materials. Compared with the nanoflower-like Mg(OH)2 and Ni(OH)2 precursors, the NixS6/Ni(OH)2 hybrid possesses hollow, abundant porous morphology and better electrical conductivity, which could provide a large contact surface area, shorter ion diffusion path and excellent charge transport, resulting in a dramatic improvement in electrochemical performance, making the NixS6/Ni(OH)2 hybrid a superb cathode material for supercapacitors.
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）