JOURNAL OF MATERIALS SCIENCE
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2025
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IF 3.9
Wang Lei,Jia Bingzhe,Yang Huailin,Qiang Xinrui,Li Jiarui,Liu Yichi,Li Zhiqiang,Wang Jialei,Wu Xinming
The development of hybrid supercapacitors has accelerated to meet the demand for fast-charging and discharging energy storage technologies in automotive and other energy storage applications. These supercapacitors combine the fast-charging benefits of capacitors with the high-energy density of batteries. To achieve this, it is essential to develop electrode materials with excellent electrochemical activity and rapid ion diffusion capabilities. This paper employs metal–organic framework (MOF) and MXene composites to address these challenges. Specifically, a one-dimensional linear nickel metal–organic framework (Ni-MOF) is grown in situ between MXene layers. The structure and morphology of the Ni-MOF were analyzed using X-ray diffraction, transmission electron microscopy (TEM), and scanning electron microscopy (SEM).The abundant Faradaic active sites and the enhanced kinetics from the synergy between the one-dimensional hollow structure and the two-dimensional layered structure resulted in a specific capacitance of 960 F g −1 for the Ni-MOF/MXene composite at a current density of 0.5 A g −1 . A Ni-MOF/MXene//AC device with an operating voltage of 1.6 V was also fabricated, exhibiting a notable energy density of 26.1 Wh kg −1 and power density of 8000 W kg −1 . The device maintained 92.4% of its specific capacity after 5000 cycles, demonstrating excellent electrochemical performance. This study not only showcases the significant potential of Ni-MOF/MXene composites in electrochemical energy storage but also lays a theoretical foundation for the development of high-efficiency supercapacitors. Graphical abstract This study utilizes metal-organic framework (MOF) and MXene composites to address energy storage challenges. A one-dimensional Ni-MOF is grown in situ between MXene layers, resulting in a specific capacitance of 960 F g⁻¹ at 0.5 A g⁻¹. A Ni-MOF/MXene//AC device was also created, with an operating voltage of 1.6 V, an energy density of 26.1 Wh kg⁻¹, and a power density of 8000 W kg⁻¹. The device retained 92.4% of its capacity after 5000 cycles, demonstrating excellent performance.
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JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Ting Zhang,Juan Huang,Yongbin Yang,Chunmei Li,Jianfeng Tang,Qing Li,Hua Lin
The development of bifunctional non-noble metal electrocatalysts with high activity and stability remains a significant challenge. In this work, Fe@Ni aerogels with core-shell structure were synthesized by sol-gel method. The unique network-like architecture and amorphous core-shell structures of Fe@Ni aerogels provide abundant defects and unsaturated sites. Moreover, the tunable surface electronic structure enhances the availability of active catalytic sites, resulting in outstanding catalytic performance for both the oxygen evolution reaction (OER) and methanol oxidation reaction (MOR). For OER, the FeNi 2 aerogel requires only an overpotential of 215 mV to achieve a current density of 10 mA cm −2 , along with a low Tafel slope of 31.7 mV dec −1 and excellent stability. For MOR, its specific and mass activities were as high as 213.6 mA cm −2 and 106.8 A g −1 , respectively. In addition, this study also elucidated the mechanism of the excellent bifunctional catalytic activity of Fe@Ni core-shell aerogels, which provides a new idea for the development of other high-activity non-precious metal electrocatalysts.
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Catalysts
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2025
·Vol. 15
·期 6
·576
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IF 4
Lanqi Wang,Hui Ni,Jianing Yu,Jingyuan Zhang,Bin Zhao
In recent years, transition metal-based catalytic materials have garnered considerable attention, particularly those exhibiting high catalytic efficiency toward both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). In this work, a self-supporting ternary transition metal phosphide (CoFeNi0.2P) with a hierarchical structure was synthesized using the Prussian blue analogue (PBA)/zeolitic imidazolate framework-L (ZIF-L) template. Benefiting from the hierarchical structure of the PBA/ZIF-L precursor and the electronic structure modulation induced by Ni doping, the resulting CoFeNi0.2P demonstrates impressive bifunctional electrocatalytic activity. Specifically, in 1 M KOH electrolyte, the CoFeNi0.2P catalyst requires an overpotential of only 88 mV to deliver 10 mA cm−2for the HER and 248 mV to achieve 50 mA cm−2for the OER. Moreover, it demonstrates satisfactory stability toward both the HER and OER. When integrated into a two-electrode electrolyzer, CoFeNi0.2P enables a current density of 10 mA cm−2at a cell voltage of 1.59 V, maintaining robust performance for over 25 h. This study provides a feasible strategy for the rational design of hierarchical electrocatalysts for efficient overall water splitting.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Wei Shan,Man Liang,Jianan Zan,Lin Liu,Lu Guo,Kwan San Hui,Min Luo,Fuming Chen
The sustainable recovery of valuable metals from spent lithium-ion batteries (LIBs) is crucial for a circular and environmentally friendly economy as the LIBs market expands. However, separating and recovering Ni 2+ and Co 2+ is challenging due to their similar physicochemical properties. This study presents a new approach to enhance Ni/Co separation by manipulating chloride coordination to impart opposite charges to the metal ions. By adjusting the Cl − concentration, Ni 2+ and Co 2+ are selectively complexed into [Ni(H 2 O) 5 Cl] + and [CoCl 4 ] 2− clusters, respectively. Coupling this coordination strategy with electrodialysis, we achieved a remarkable Ni 2+ /Co 2+ separation selectivity of up to 370.70. When applied to NCM or NCA battery leachate solutions, the separation selectivity remained high, reaching 90.60 and 109.42, respectively, despite variations in metal ion concentration ratios. This chloride coordination-assisted electrodialysis strategy offers a promising alternative for Ni/Co separation, a critical step in the hydrometallurgical recycling of LIBs
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
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IF 15.7
Zhang Tianyu,Wang Weibo,Liu Wenxian,Guo Zhengxiao,Liu Junfeng
Reconstruction of metal-organic frameworks often occurs under reaction conditions, thereby impeding true active species identification and hindering mechanism understanding. Herein, we present the mechanistic insight underlying the electrochemical synthesis of deprotonated anion of H 2 O 2 (HO 2 − ) via 2e − oxygen reduction by ultrathin Ni-benzenedicarboxylic acid (NiBDC), guided by its thickness-dependent performance and pH-induced reconstruction behavior. The real active species are identified as alkaline-reconstructed β-Ni(OH) 2 that is chemically coupled with 1,4-benzenedicarboxylic acid residual ligand. The hybrid catalyst is characterized to exhibit an optimized surface electronic structure, which improves the intrinsic activity and selectivity. Operando characterization and theoretical simulations further reveal that the residual ligand functionalization significantly boosts the formation and facilitates the adequate binding of *OOH intermediates. Thus, the ligand-functionalized Ni(OH) 2 exhibits high HO 2 − selectivity (>90%) in 0.1 M KOH across a broad current density up to 200 mA cm −2 . Moreover, high HO 2 − production rate of 13.7 mol g cat −1 h −1 with significant accumulation of 2.0 wt.% HO 2 − under alkaline conditions is achieved at 200 mA cm −2 over 100 h, suggesting the promising potential for large-scale electrosynthesis of HO 2 − in industrial applications.
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高影响因子
ELECTROCHIMICA ACTA
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2026
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IF 5.8
Wenhui Li,Da Qiu,Junwei Huang,Haoyi Li,Hongna Xing,Xiuhong Zhu,Juan Feng,Yan Zong,Xinghua Li,Xinliang Zheng
The intrinsically low conductivity of CuCo 2 S 4 severely limits its electrochemical performance as an electrode. Herein, we propose an atomic-level doping strategy via a ternary Cu-Co-Ni MOF precursor to precisely incorporate Ni into the CuCo 2 S 4 lattice. First-principle calculations reveal that Ni doping introduces localized electronic states near the Fermi level, effectively narrowing the bandgap and inducing a semiconductor-to-metallic transition. This electronic structure modulation significantly enhances bulk electron mobility and strengthens the adsorption of electrolyte OH - ions. Coupled with the preserved porous carbon framework and multi-metal synergistic interface, the optimized Ni-CuCo 2 S 4 @C electrode achieves a high specific capacitance of 1046 F g -1 at 1 A g -1 . The assembled asymmetric supercapacitor delivers an energy density of 32 Wh kg -1 at 750 W kg -1 , alongside excellent cycling stability. This work elucidates the electronic origin of performance enhancement and provides a doping-guided design principle for high-conductivity metal sulfide electrodes.
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ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Jianhong Liu,Rui Pan,Hao Liu,Xin-Yu Huang,Yu Deng,Jianfeng Xia,Yi Gong,Wenhe Xie,Yonghui Deng,Qin Yue
Core–shell microspheres with a supporting polymer core and conductive shell emerge as effective fillers for anisotropic conductive films (ACFs) that are widely used in high-precision interconnection of miniaturized electronics. Conventional methods for synthesizing such conductive microspheres usually require the use of hazardous sensitizers, which severely hinder their scalable and environmentally friendly production. Herein, an economical strategy is developed to facilely synthesize core–shell conductive microspheres by using bi-functional amine polychloromethylstyrene (PCMS) as the substrate. The amino groups of PCMS can undergo cross-linking with ethylenediamine, thereby endowing the microspheres with excellent structural stability in organic solvents. Simultaneously, the strong anchoring effect of the amino groups facilitates the formation of ultrafine Pd nanoparticles on the surface, which serve as catalytic sites for the subsequent electroless deposition of Ni layer with an adjustable thickness (100–400 nm). Due to the uniform size, high electrical conductivity, and robust mechanical stability of PCMS@Ni microspheres, the fabricated ACFs exhibit excellent pressure-sensitive conductive performance and anisotropic conductivity, enabling high-resolution display and a wide color gamut in liquid crystal devices. Furthermore, the versatility of this functionalization strategy is demonstrated by extending the deposition to other metals, such as Ag and Au, highlighting its broad applicability in advanced electronic materials.
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ACS Catalysis
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2026
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IF 13.6
Wenmin Liao,Siyu Liu,Hui Xie,Jingdong Lin,Shaolong Wan,Shuai Wang
Ethanol steam reforming (ESR) enables renewable biomass-derived H2 production but suffers from selectivity and deactivation challenges. While CeO2-supported metal catalysts are widely explored for ESR owing to strong metal–support interactions and inherent oxygen storage capacity, persistent ambiguities in facet-dependent performance arise from methodological constraints in decoupling intrinsic facet effects from metal particle size variations. By synthesizing morphology-controlled CeO2 supports exposing distinct facets ({100}, {110}, {111}) and anchoring size-uniform Ni nanoparticles (∼2 nm), we decoupled facet contributions to reveal how facet-specific Lewis acidity governs OH* reactivity at Ni–CeO2 interfaces. Combined kinetic assessments, in situ spectroscopy, and density functional theory identify α-C–H abstraction from CH3CH2O* by interfacial OH* as the kinetically relevant step, with acetate intermediates directly formed from CH3CH2O* (not acetaldehyde) facilitating C–C bond scission under steam-rich conditions. Ni supported on {100}-rich CeO2 nanocubes enhances OH* reactivity via weakened Lewis acidity, lowering acetate formation barriers. This facet-modulated interfacial chemistry achieves 426 mmol gcat–1 h–1 H2 formation rate and 72.1% CO2 selectivity at 400 °C, surpassing literature benchmarks under comparable conditions. These findings elucidate how facet-dependent interfacial chemistry dictates ESR performance on Ni/CeO2 catalysts, providing mechanistic insights beyond conventional oxygen storage capacity correlations.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Zengkun You,Tian Tang,Kai Ou,Yuxiang Ni,Yudong Xia,Hongyan Wang
The escalating global energy crisis has intensified research efforts toward developing heterogeneous structures capable of addressing the sluggish kinetics of the hydrogen evolution reaction and oxygen evolution reaction in electrocatalysis. In this study, a novel strategy for the design of highly efficient bifunctional electrocatalysts was proposed. Uniform Ni nanolayers were successfully deposited on Nb 2 CT x /CNT hybrid supports through a combination of CVD and magnetron sputtering techniques. The resulting Ni/Nb 2 CT x /CNT@NF catalyst demonstrated exceptional electrocatalytic performance in 1 M KOH. For HER, it achieved remarkably low overpotentials of 41 mV@10 mA cm −2 and 196 mV@100 mA cm −2 . Similarly, for OER, the catalyst exhibited outstanding activity with overpotentials of 299 mV@20 mA cm −2 and 337 mV@50 mA cm −2 . Furthermore, the catalyst maintained stable performance at 20 mA cm −2 for 48 h without significant degradation, highlighting its excellent long-term stability. The superior catalytic performance can be attributed to several key factors: (1) The uniform distribution of Ni nanolayers enhances intrinsic conductivity and increases the density of active sites; (2) The incorporation of CNTs expands the reaction interface, facilitating charge and mass transfer; and (3) The electronic interaction between Nb 2 CT x and Ni further optimizes the catalytic kinetics.
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ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Wenli Pei,Xiaoyang Wang,Chunhong Liu,Dong Zhao,Chun Wu,Kai Wang,Qiang Wang
Hyperbranched transition metal phosphides (TMPs) nanocrystals are an interesting class of materials, which can be used as an efficient catalyst for hydrogen evolution reaction (HER). However, big challenge remains for the preparation of ternary hyperbranched TMPs, and relationship between their HER performances and the splitting degree is also not well understood. Here, hyperbranched Co-Ni-P nanocrystals with different splitting degrees were prepared via a novel strategy, and their alkaline HER performances were studied. During the synthesis process, hyperbranched Co 2 P nanocrystals were used as template, and Ni precursors were injected into the reaction solution at different holding stage. When the Ni precursor was injected earlier, the podgy particles with low splitting degree would be obtained. Conversely, delaying the injection of Ni precursor would lead to high splitting degree. The formation process of ternary phase was also studied. After Ni precursor was injected, a Co-Ni-P amorphous layer was formed on the surface of the Co 2 P particles, and then the Ni atoms diffused into the Co 2 P phase to form Co-Ni-P nanocrystals. Electrochemical performances tests show that the splitting degree has great impact on HER performances. The higher splitting degree usually leads to larger electrochemical surface area, and higher catalytic activity can be achieved. The sheaf-like Co-Ni-P nanocrystals demonstrate a small overpotential of 119 mV at current density of 10 mA cm −2 , and good durability over 23 h in 1 M KOH solution. We believe that this work can help understand the relationship between the HER performances of hyperbranched TMPs nanocrystals and their splitting degree, and provide a synthetic strategy for the preparation of highly efficient TMPs catalysts.
研究领域:
材料科学
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电化学
·
纳米技术
·
催化
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高影响因子
LANGMUIR
·
2011
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IF 4.269
Changdong Gu,Jiangping Tu
We report a procedure to fabricate nanostructured Ni films via programmed electrochemical deposition from a choline-chloride-based ionic liquid at a high temperature of 90 °C. Three electrodeposition modes using constant voltage, pulse voltage, and reverse pulse voltage produce a variety of nanostructured Ni films with micro/nanobinary surface architectures, such as nanosheets, aligned nanostrips, and hierarchical flowers. The nanostructured Ni films possess face-centered cubic crystal structure. Amazingly, it is found that the electrodeposited Ni films deliver the superhydrophobic surfaces without any further modifications by low surface-energy materials, which might be attributed to the vigorous micro/nanobinary architectures and the surface chemical composition. The electrochemical measurements reveal that the superhydrophobic Ni film exhibit an obvious passivation phenomenon, which could provide enhanced corrosion resistance for the substrate in the aqueous solutions.
研究领域:
材料科学
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电化学
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纳米技术
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表面工程
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腐蚀科学
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INORGANIC CHEMISTRY
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2019
·
IF 4.85
Changwei Chen,Xiangbo Feng,Qing Zhu,Rui Dong,Rui Yang,Yan Cheng,Chi He
In the present work, a series of MOF-74 (Ni) materials with narrow micropore channels and abundant unsaturated metal sites was respectively prepared via hydrothermal (HT), condensation reflux (CE), and microwave-assisted (MW) methods. The physicochemical properties of synthesized materials were characterized by powder X-ray diffraction, N2-sorption, field-emission scanning electron microscopy, Fourier-transform infrared (FTIR), thermogravimetric (TG)/TG-FTIR, X-ray photoelectron spectroscopy, UV–vis–near infrared, NH3/CO2-temperature programmed desorption, and in situ diffuse reflectance infrared Fourier transform spectroscopy. Their CO2/N2 adsorption performances were evaluated by isotherm adsorption and dynamic adsorption experiments. We found that the MW is a rapid and facile protocol for the synthesis of MOF-74 (Ni) materials with highly efficient CO2 capture capacity. The well-shaped MW-140 adsorbent with superior CO2 adsorption capacity of 5.22 mmol/g at 25 °C can be obtained within 60 min by the MW process, almost 6 times higher than that of the commercial activated carbon (0.89 mmol/g). Results of dynamic adsorption experiments showed that the MW-140 material possesses the highest CO2 adsorption capacity of 3.37 mmol/g under humid conditions (RH = 90%). Importantly, MW-140 has excellent adsorption stability and recyclability, superior CO2 capture selectivity (CO2/N2 = 31), and appropriate isosteric heat in CO2 adsorption (21–38 kJ/mol), making it a promising and potential material for industrial CO2 capture. Characterization results demonstrated that the high capture capability of MOF-74 (Ni) materials can be attributed to the synergistic effect of abundant narrow micropore channels and rich five-coordinated Ni2+ open metal sites which are beneficial for the trapping of CO2 molecules.
研究领域:
材料科学
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环境化学
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无机化学
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碳捕集与封存
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纳米材料
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危险品化学品经营许可证（带存储）