ACS Nano
·
2024
·
IF 15.8
Miao Chang,Fangyuan Cheng,Wen Zhang,Mengyi Liao,Qing Li,Chun Fang,Jiantao Han
Surface engineering is sought to stabilize nickel-rich layered oxide cathodes in high-energy-density lithium-ion batteries, which suffer from severe surface oxygen loss and rapid structure degradation, especially during deep delithiation at high voltages or high temperatures. Here, we propose a well-designed oxygen-constraining strategy to address the crisis of oxygen evolution. By integrating a La, Fe gradient diffusion layer and a LaFeO3 coating into the Ni-rich layered particles, along with incorporating an antioxidant binder into the electrodes, three progressive lines of defense are constructed: immobilizing the lattice oxygen at the subsurface, blocking the released oxygen at the interface, and capturing the residual singlet oxygen on the external surface. As a result, effective surface passivation, mitigated bulk and surface degradation, suppressed side reactions, and enhanced electrochemical performance are achieved, far beyond conventional single surface modification. The Ni-rich layered oxide cathodes with integrated oxygen-constraining modifications demonstrate impressive cycling stability in both half-cells and full cells, achieving stable long-term cycling even at a high cutoff voltage of 4.7 V and a high temperature of 45 °C. This work provides a multilevel oxygen-constraining strategy, which can be extended to various layered oxide cathodes involving oxygen release challenges, providing an effective path for the development of high-energy-density lithium-ion batteries.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2024
·
IF 24.4
Hongyan Zhang,Hao Zhou,Hua Wang,Yikai Wang,Xuehan Yang,Dan Wu,Pan Yuan,Maoshuai He,Wenxian Wei,Tao Yang
Water electrolysis holds the promise of transforming electric-power into hydrogen energy through a carbon free process and its widespread application highly depends on anodic oxygen evolution reaction (OER) efficiency. Transition metal-based OER catalysts meet the requirements of long-term development for cost effectiveness, and their performance can be improved by a variety of band electronic structure modulating methods. Herein, a multihybridization strategy is proposed, i.e., p-d, s-sp , and d-d hybridization are emphasized together, which guides the design of an effective vanadium (V), boron (B)-FeNiP catalyst. Density functional theory analysis reveals the existence of multihybridization and the difference between Fe and Ni in terms of hybridization strength, band configuration, and interfacial charge transfer. Specially, Fe and Ni sites are simultaneously optimized to their highest performance upon the dual B, V incorporation. As a result, the VB-FeNiP catalyst displays outstanding OER performance, regarding a Tafel slope of 57.64 mV dec −1 , an overpotential of 175 mV at 100 mA cm −2 , and exceptional stability. Here the synergistic effect of multihybridization in the design of transition metal-based catalysts is highlighted and the work in pursuit of effective way based on regulating band configuration to developing high performance OER catalysts would be evoked.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 9
·6807-6818
·
IF 2.993
Gao Shuwen,Sui Yanwei,Wei Fuxiang,Qi Jiqiu,Meng Qingkun,He Yezeng
Metal–organic frameworks (MOF) used directly in supercapacitors have attracted much attention for their special porous structure and potential high performance. Here, the Ni-MOF is fabricated by one-step facile hydrothermal method with a modification of mixed solution with DMF and water instead of pure DMF. After characterization, the Ni-MOF exhibits loosely stacked layer-cuboid structure with abundant mesoporous, which is beneficial for the charge transfer and ion transport for supercapacitors. In the three-electrode system, this Ni-MOF serving as working electrode shows remarkable specific capacitance of 804 Fg −1 at 1 Ag −1 , excellent rate capacitance of 534 Fg −1 at 10 Ag −1 , and with 302 Fg −1 retention after 5000 cycles, when measured in 2 M KOH electrolyte solution. To make a further research into the practical utility of the Ni-MOF, the Ni-MOF//AC asymmetrical supercapacitor device is assembled with the Ni-MOF and active carbon acted as positive and negative electrode materials, respectively. This device exhibits high specific energy of 31.5 Wh kg −1 , at specific power of 800 W kg −1 . All these results demonstrate that this Ni-MOF is a kind of promising electrode material for high-performance supercapacitors.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2024
·
IF 15.7
Qian Zhang,Xunzhu Jiang,Yang Su,Yang Zhao,Botao Qiao
With the increasing production of propane from shale gas and the growing demand for propylene, propane dehydrogenation (PDH) has gained significant attention as a promising route for the on-purpose production of propylene. As a cheap yet efficient catalyst, Ni-based catalysts have attracted interest because of its ability to activate alkane. Single-atom catalysts (SACs) can maximize the metal atom utilization. Here, we demonstrate that anatase TiO 2 supported Ni SAC (Ni 1 /A-TiO 2 ) exhibits not only superior intrinsic activity and propylene selectivity but also much better stability than the corresponding Ni nanoparticle (NP) catalyst (Ni NP /A-TiO 2 ) in PDH reaction at 580 °C. The rate of propylene production on Ni 1 /A-TiO 2 is about 1.96 mol C3H6 g Ni −1 h −1 , about 65 times higher than that of Ni NP /A-TiO 2 sample (0.03 mol C3H6 g Ni −1 h −1 ). In combination of high-angle annular dark-field scanning transmission electron microscopy, in-situ diffuse reflectance infrared Fourier transform spectra, in-situ X-ray photoelectron spectroscopy and X-ray absorption spectroscopy characterizations, we confirm that the Ni SAC mainly contains individual Ni atom singly dispersed on the support in positive Ni (II) valence state. In addition, as a result of strong metal-support interaction (SMSI) between Ni NP and TiO 2 carrier under reduced conditions, the Ni NPs sites are encapsulated by TiO x overlayer (~2 nm thick) thus display poor reaction performance.
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Yilin Zhang,Yanhui Long,Kaiyi Wang,Xiaosong An,Liboting Gao,Zijiang Zhao,Jianhua Yan,Hao Zhang
Developing alternatives to the energy-intensive Haber–Bosch (H–B) process for ammonia synthesis is imperative yet challenging. Herein, Ni-modified zeolitic imidazolate framework (ZIF) Ni@ZIF-67 nanocrystals were synthesized and applied in a dielectric barrier discharge reactor for plasma-assisted ammonia synthesis under ambient pressure. Introducing ZIF-67 into the plasma enhanced the ammonia synthesis rate by an order of magnitude, evidencing strong plasma–catalyst synergism. The superior performance was attributed to the unique microstructure featuring a high specific surface area and abundant porosity, which improved gas adsorption and intensified microdischarge within the plasma. Further incorporation of Ni into ZIF-67 (Ni@ZIF-67) resulted in a maximum ammonia synthesis rate of 289.45 μmol g–1 min–1 and an energy yield of 1.83 g kWh–1─a 32.0% improvement over ZIF-67─while maintaining structural stability over repeated cycles. Moreover, the confinement of NH3 within sub-Debye-length micropores suppressed plasma-induced decomposition. The addition of Ni further significantly boosted both the hydrogen/ammonia adsorption capability and discharge efficiency, which promoted ammonia formation, especially in a H2-rich atmosphere. These findings underscored the potential of Ni@ZIF-67 as a promising catalyst for plasma-assisted ammonia synthesis, providing a viable alternative to the conventional H–B process.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2025
·
IF 8.6
Hongliang Fu,Qiaowei Wang,Yue Lian,Yongfeng Hu,Jing Zhao,Huaihao Zhang
It is crucial to rationally design catalysts with high activity and strong stability for electrolytic water oxygen evolution reaction (OER). Here, Ni-FeNbO 4 @NC microspheres were successfully synthesized as OER catalysts by interface optimization and Ni-doping. To address FeNbO 4 problems such as easy agglomeration, low catalytic activity and poor electrical conductivity, the catalyst was incorporated in N p-orbital of imidazole and metals (Ni and Fe) empty d-orbitals to form coordination compound, thus avoiding oxides direct contact and effectively improving dispersion. Moreover, Ni-doping provides additional catalytic active sites, good current impact resistance and large intrinsic conductivity for Ni-FeNbO 4 @NC. Besides, under high-temperature carbonization, the Ni-FeNbO 4 surface imidazole evolves into N-containing carbon layer, which enhances overall electrical conductivity to reduces ohmic overpotential. According to density functional theory calculations (DFT), Ni-doping lowers Gibbs free energy of OER decisive rate step, and enlarges reaction kinetics. From in-situ Fourier Transform infrared spectroscopy (FTIR) and in-situ differential electrochemical mass spectrometry (DEMS), Ni-FeNbO 4 @NC displays multiple types of catalytic active sites (Ni∗, and C-N∗) and efficient oxygen production efficiency. Under the synergistic effect of interface optimization and Ni-doping, Ni-FeNbO 4 @NC exhibits good catalytic activity in OER (low overpotential: 286 mV@10 mA cm −2 , small Tafel slope: 56.7 mV dec −1 , 50 h long stability).
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xinling Zhang,Yongxiao Tuo,Qing Lu,Yuanyuan Liu,Jiabing Luo,Hui Zhang,Jingyuan Shang,Yan Zhou,Jun Zhang
The impact of carbon material curvature is often underestimated in studies of carbon-based electrocatalysts for the CO 2 reduction reaction (CO 2 RR). To clarify its role, we tuned the diameter of nitrogen-doped carbon nanotube (NCNT) by controlling the size of embedded Ni nanoparticles (50 to 120 nm), in which the Ni-modified C-N species has been identified as an efficient site for CO 2 RR to CO. We found that the FE CO and TOF increase with the curvature of NCNT, particularly in the high potential window that is the diffusion-limited region. This enhancement is attributed to accelerated CO desorption since the electrophobic nature of high-curvature C-N defects reduces hybridization between *CO and active sites. These insights highlight curvature engineering as a promising strategy to enhance CO current density in carbon-based electrocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Tong Zhang,Haiyong Wang,Chenguang Wang,Qiying Liu
Acetol is the important platform molecule, which showed diversified applications in organic synthesis, pharmaceutic, food and polymer industrials. The production of acetol from selective fructose hydrogenolysis is of scientific and practical interests. However, by catalysis, precisely controlling the target C-C and C-O bonds splitting is an open challenge, resulting in the low target product yields. Herein, by regulating the metal-support-interactions, which enhanced electron transfer capacity and improved acetol production from fructose hydrogenolysis through controlling the important intermediate species, obtaining the highest 53.6 % yield and an average conversion rate of 1.24 × 10 −5 mol/(g cat .s) within short time of 10 min. The interfacial charge transfer in the surface structure of the catalyst along with the Ni metal content was revealed by various characterizations. This research provides a preliminary method for electron transfer regulation of Ni/CeO 2 catalysts in acetol production from fructose hydrogenolysis, showing practical application potentials due to the simple preparation of the catalyst that possibly contribute to the reactions on a large scale.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Shigang Li,Xiaohui Liu,Yong Guo,Yanqin Wang
Ammonia is considered as a potential hydrogen carrier as its high hydrogen content. Hydrogen release still presents challenges due to the lack of efficient catalyst. In this work, we report a Ni@SiO 2 catalyst prepared through a sol–gel method, which displays satisfied catalytic activity and remarkable long-term stability. The origination of activity and stability has been investigated carefully by various characterizations. The strong interaction between nickel species and silica species is responsible for the excellent performance via generating small nickel particle and hindering the sintering of nickel during the high temperature reaction condition. This study offers novel insights into the design and preparation of highly efficient catalysts for ammonia decomposition to produce hydrogen.
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 52
·46270-46277
·
IF 3.289
Wei Shao,Jimin Wu,Hui Liu,Guanghui Dong,Shuxia Wang,Huihua Min,Min Huang
Bacterial adhesion on the surfaces of medical devices, food processing equipment, heat exchangers and ship hulls has been recognized as a widespread problem. Bacterial adhesion on a surface is influenced by surface physical and chemical properties of the surface. In this paper, polyethyleneimine (PEI) grafted graphene oxide (GO) nanosheets were incorporated into Ni–P coatings by an electroless plating technique to modify the surface energy, and therefore to influence the interactions between the prepared surfaces and the tested bacteria. Ni–P–GO coatings were investigated by SEM, AFM, Raman spectrum and XPS. Contact angles of Ni–P–GO coatings with different GO loadings were tested and the surface free energies and their dispersive and polar components were calculated using the van Oss acid–base approach. The results showed that the surface free energies of the coatings had a significant influence on S. aureus adhesion. The Ni–P–GO coatings showed excellent antibacterial adhesion activity. Extended DLVO theory is used to explain the antibacterial adhesion behavior. The novel coatings reported here can be used in controlling bacterial adhesion and biofilm formation for various applications.
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Hao Zhou,Yikai Wang,Hua Wang,Heye Fu,Ranran Li,Yuekai Zhang,Hong Zhao,Cuishuang Jiang,Tingting Yu,Xia Sun,Maoshuai He,Wenxian Wei,Tao Yang
Hydrogen has garnered attention as a promising carbon-free energy carrier capable of addressing escalating energy demands and environmental concerns. However, hydrogen production via alkaline water electrolysis is hindered by the sluggish kinetics of oxygen evolution reaction (OER). Although Ni₃Se₂ has attracted interest as a non-precious metal-based OER catalyst, its performance remains suboptimal. In this work, we present a trimetallic-doped electrocatalyst, CoWCe-Ni₃Se₂, which exhibits outstanding OER performance in alkaline media. The catalyst demonstrates only 204 mV to achieve a current density of 100 mA cm⁻², along with a notably small Tafel slope of 33.59 mV dec⁻¹. Furthermore, it shows exceptional operational durability, maintaining 95% of its initial activity over 90 hours of continuous electrolysis. Mechanistic insights derived from density functional theory (DFT) calculations reveal that the co-doping of W and Ce facilitates the adsorption of critical *OOH intermediates and significantly lowers the energy barrier of the rate-determining step (RDS). The enhanced catalytic performance is attributed to the improved electrical conductivity, increased active surface area, and optimized adsorption/desorption behavior of reaction intermediates. Beyond introducing a highly active and stable OER electrocatalyst, this study provides a fundamental understanding of the synergistic effects of multi-element doping for the rational design of high-performance catalysts.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
·
2022
·
IF 1.404
Dongdong Zhang,Pan Zhang,Jiahuan Chen,Zhen He,Mingfang Wu
This study develops the Ni–Fe–P–TiO 2 nanocomposite coatings via an electroless deposition process. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to determine the coating structures. Hardness and wear tests were conducted to measure the coating’s mechanical performance, and polarization curves were recorded to evaluate the corrosion behavior. The results show that the TiO 2 nanoparticles are incorporated into the coatings. The proper addition of TiO 2 refines the coating surface morphology without changing the coating phase constituents. The best mechanical and corrosion performance is obtained for the 0.5-g/L modified Ni–Fe–P–TiO 2 sample, owing to its compact surface feature and well-dispersed TiO 2 nanoparticles.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）