CRYSTENGCOMM
·
2025
·
IF 2.6
Feng Jiao,Jinzhao Huang,Zehui Liu,Yu Zhang,Xiaolong Deng,Ke Zhang,Guixin Zhao
In this paper, sodium sulfite (Na₂SO₃) and cerium nitrate (Ce(NO₃)₃) were added in the hydrothermal method for the preparation of FeCo LDH, and needle-like Ce-FeCo LDH (NS) catalysts were grown in situ on a carbon cloth.The additions of Na₂SO₃ and Ce(NO₃)₃ regulated the electron transfer of the metal cations in the LDH, and significantly improved the performance of the catalysts. The prepared Ce-FeCo LDH (NS) catalysts exhibited excellent electrochemical properties. The overpotential of OER was 221 mV at a current density of 10 mA/cm² in 1 M KOH. The surface structure and catalytic performance of the catalysts were maintained well after 100 h stability test. This study provides a new idea for the improvement and design of OER catalysts based on FeCo LDH, which is an important reference for clean energy research.
研究领域:
材料科学
·
清洁能源研究
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Shilong Wang,Chuqi Li,Ziyun Zhang,Lei Li,Wentao Ding,Sheng Han,Jibo Jiang
Engineering a heterogeneous structure with distinctive morphology and nanostructure is deemed to be an efficacious tactic for realising high energy density supercapacitors (SCs). Herein, the FeCo 2 S 4 @NiCo-LDH(FeCoS@NiCo-LDH)/NF nanocomposite heterostructure is successfully constructed through a facile two-step electrodeposition method. This heterostructure merges the merits of FeCoS with high electrical conductivity and NiCo-LDH with ultra-high specific surface area, which not only can deliver sufficient electroactive central sites, but also provide shorter routes for expedited ion diffusion, even more significantly, the heterogeneous interfaces that emerge in composites can moderate their electronic structure and augment electrical conductivity. Density functional theory (DFT) calculations indicate that the heterostructured FeCoS@NiCo-LDH/NF displays preferable electrochemical activeness and enhanced adsorption ability. Thanks to the abundance of heterogeneous interfaces and synergistic effects of the various active ingredients, FeCoS/NiCo-LDH electrodes exhibit an extraordinary specific capacity of 930 C g −1 at 1 A g −1 together with remarkable cycle longevity (10.9 % capacity decay after 10,000 cycles). In addition, a hybrid FeCoS@NiCo-LDH/NF//AC exhibits a high energy density of 52.81 Wh kg −1 at the 750 W kg −1 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Akhmat Fauzi,Shuo Geng,Fenyang Tian,Yequn Liu,Haibo Li,Yongsheng Yu,Jiaming Li,Weiwei Yang
Interface engineering is an efficient strategy for synthesis of high efficiency catalysts which can combine the advantages of each part for improving the catalytic activity . Herein, we fabricate the heterostructure NiFe-LDH@Ni 3 S 2 by interface engineering through a simple hydrothermal combined with electrodeposition method. Combining the high conductivity of Ni 3 S 2 and high intrinsic OER activity of NiFe-LDH at the interface, the NiFe-LDH@Ni 3 S 2 electrode exhibits a relatively low overpotential of 240 mV for OER at a current density of 200 mA cm −2 which is lower than NiFe-LDH and Ni 3 S 2 . In addition, the overall water splitting unit provides a potential of 1.47 V at 10 mA cm −2 . Furthermore, after 24 h of electrolysis in 1.0 M KOH, the current density remains 98% of the original value. This work paves a new way for synthesis of more heterostructure catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Batteries-Basel
·
2025
·Vol. 11
·期 5
·170
·
IF 4.8
Junhua Zeng,Jinlei Gao,Wenyao Lu,Jiashuo Feng,Ting Deng
Layered double hydroxides (LDHs) are one class of two-dimensional materials, with tunable chemical composition and large interlayer spacing, that is a potential cathode material candidate for aqueous zinc-ion batteries (AZIBs). Nevertheless, the low conductivity and fragile structure of LDH have impeded their practical application in AZIBs. Herein, a ternary CoMnAl LDH is synthesized via the facile coprecipitation method as the cathode material for AZIB. The interaction between trivalent Al3+and Mn3+not only lowers the redox energy barrier but also enhances the electronic structure, as proved by EIS analysis and DFT simulation. As a result, the synthesized CoMnAl LDH displays a high specific capacity of 238.9 mAh g−1at 0.5 A g−1, an outstanding rate performance (138.8 mAh g−1at 5 A g−1), and a stable cyclability (92% capacity retention after 2000 cycles).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Gaimei Gao,Guang Yang,Mingyu Dou,Shirong Kang,Xingliang Yin,Hua Yang,Wenning Yang,Dacheng Li,Jianmin Dou
The development of excellent photocatalysts for hydrogen evolution is of great significance to solving the global energy crisis. In this work, a novel 3D hierarchical CdS/NiAl-LDH photocatalyst was fabricated by a facile electrostatic assembly strategy, which was composed of 1D CdS nanorods and 3D flower-like NiAl-LDH microspheres . Under the visible irradiation, the CNA-20 hierarchical photocatalyst presents the optimum hydrogen evolution rate achieved to 3.24 mmol g −1 h −1 , which is improved 6.23-fold in comparison with the pure CdS. Through the analysis of energy band structures and first-principles calculation, the type-Ⅱ charge transfer mechanism was proposed. Driven by the built-in electric field, as well as the effect of intimate interface contact of CdS and NiAl-LDH, the photogenerated charge could be achieved rapidly separate and migrate, which effectively promotes the H 2 evolution. This well-designed synergistic 1D/3D interface interaction and provides an economic approach to rationally developing metal-free photocatalysts for hydrogen production .
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zhicong Yuan,Xuelian Chen,Xiqiang Pan,Guojuan Hai
The development of efficient electrocatalysts through heterostructure engineering is crucial for boosting the oxygen evolution reaction (OER) kinetics. Herein, we demonstrate a hierarchical MIL-53/NiCu-LDH(12) heterostructure in-situ grown on nickel foam (NF), where the MIL-53 component is controllably constructed on NiCu-LDH/NF to establish robust interfacial contact and electronic coupling. This multi-level architecture synergistically endows the catalyst with enlarged electrochemical active surface area, abundant accessible active sites, accelerated electron transfer kinetics, and reduced band gap. Remarkably, operando characterization reveals that the heterojunction undergoes partial structural reconstruction during OER to generate γ-FeOOH/γ-NiOOH active phases. The formed Fe-O-Ni bridging bonds facilitate interfacial charge redistribution, which effectively modulates the electronic configuration and optimizes reaction intermediates adsorption. Benefiting from these merits, the MIL-53/NiCu-LDH(12)/NF electrode delivers exceptional alkaline OER performance, requiring ultralow overpotentials of 160 and 226 mV to achieve current densities of 10 and 100 mA cm −2 , respectively, along with a small Tafel slope of 42 mV dec −1 . This work proposes an innovative strategy integrating hierarchical architecture design with interfacial electronic modulation for developing advanced transition metal-based OER electrocatalysts.
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
·
2016
·Vol. 18
·期 21
·5900-5914
·
IF 8.506
Shuangtao Yin,Jin Li,Hui Zhang
A series of honeycomb-like hierarchical hollow nanostructured magnetic catalysts, γ-Fe2O3@M3Al-LDH@Au25-x (x represents determined mass of gold in wt%), have been successfully fabricated by modified electrostatic adsorption of water-soluble captopril-capped Au25 nanoclusters (Au25Capt18) on pre-prepared magnetic supports, Fe3O4@M3Al-LDH (M = Ni, Mg, or Cu/Mg (0.5/2.5), LDH: layered double hydroxide) followed by proper calcination. The characterization results show that the low Au-loading samples, γ-Fe2O3@Ni3Al-LDH@Au25-x (x = 0.053, 0.11), show nearly atomically precise Au25 nanoclusters (Au25NCs) (∼1.4 ± 0.3–1.9 ± 0.6 nm) dispersed on the surface of the Ni3Al-LDH shell, while the catalysts, γ-Fe2O3@M3Al-LDH@Au25-x (x ∼ 0.2), display slightly aggregated Au25NCs on the LDH shell with sizes of ∼3.0 ± 1.3, 3.3 ± 1.2, and 4.2 ± 1.5 nm for Ni-, Mg-, and CuMg-based catalysts, respectively, related to varied synergy between Au25NCs and magnetic LDH supports at slightly higher Au loadings. All the γ-Fe2O3@M3Al-LDH@Au25-x catalysts exhibit much higher catalytic activity for the oxidation of 1-phenylethanol under atmospheric O2, without basic additives, in toluene than Fe3O4@Mg3Al-LDH@Au prepared by a traditional deposition–precipitation method. The catalyst, γ-Fe2O3@Ni3Al-LDH@Au25-x, presents even higher alcohol oxidation activity than γ-Fe2O3@Mg3Al-LDH@Au25-0.21 and γ-Fe2O3@Cu0.5Mg2.5Al-LDH@Au25-0.2 and, particularly, γ-Fe2O3@Ni3Al-LDH@Au25-0.053 exhibits the highest activity (TOF: 112 498 h−1) for the aerobic oxidation of 1-phenylethanol under solvent-free conditions and can be applied for a variety of alcohols, this being mainly attributed to its nearly atomically precise Au25NCs and remarkable Au25NCs–LDH–magnetic core three-phase synergistic interaction, along with its abundant Ni-OH sites. Moreover, γ-Fe2O3@Ni3Al-LDH@Au25-0.053 can be easily separated, by simply applying an external magnetic field, and reused for more than ten runs without significant loss of activity, giving the magnetic catalysts long-term stability. These observations make Fe3O4@LDH a universal green platform to support other noble or non-precious metal nanoparticles by using a metal nanocluster precursor method to construct desired metal-loaded ecofriendly catalysts that can be applied in a broad range of heterogeneous catalysis processes.
研究领域:
催化化学
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Tao Wang,Jinyu Wang,Chunlan Li,Yu Wu,Yuxuan Sun,Xiqing Liu,Xiaoli Su,Hongquan Zhan,Yongqing Wang
Carbon materials can act as electron transfer media to effectively enhance photocatalytic performance. In this study, carbon dots (CDs) were prepared using green tea to modify Ni 2 P/NiCo-LDH heterostructures. Benefitting from the Co-P bond formed between Ni 2 P and NiCo-LDH and biomass CDs, charge transfer was improved via dual channel. Ni 2 P and CDs acted as active sites for improving the photocatalytic performance. Owing to the synergistic process, the photoresponse capability of CDs/Ni 2 P/NiCo-LDH was significantly increased. In addition, the possible active species in the photocatalytic process are discussed. This study provides a design for ternary photocatalysts with carbon materials and phosphides.
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 Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Yi Ma,Huan Ge,Yong Zhang,Ning Jian,Jing Yu,Jordi Arbiol,Canhuang Li,Yue Zhong,Luming Li,Hui Kang,Jun Wang,Andreu Cabot,Junshan Li
The electrocatalytic oxidation of small organic molecules, such as ethylene glycol (EG), can be paired with the hydrogen evolution reaction (HER) to effectively lower the overall cell voltage, thereby enhancing energy efficiency for hydrogen production. Moreover, the anodic EG oxidation reaction (EGOR) can generate valuable C1 and C2 compounds, offering a sustainable approach to greener chemical production. The industrial viability of this process requires nonprecious metal electrocatalysts that demonstrate high performance at low potential and exhibit high selectivity. In this study, we report on a cost-effective electrocatalyst based on a nickel sulfide phase (Ni3S2) heterogeneously nucleated on the surface of nickel–iron-manganese layered double hydroxide (NiFeMn-LDH) nanosheet arrays and supported on nickel foam (NF), demonstrating exceptional activity for the coupled HER and EGOR in alkaline conditions. This Ni3S2@NiFeMn-LDH/NF catalyst achieves an EG-to-formate faradaic efficiency of up to 90% at 1.5 V, with glycolate and oxalate as minor byproducts. Density functional theory calculations reveal that the EGOR was facilitated by the phase-separated Ni3S2, which lowers the energy barrier of the rate-limiting step. This work presents a promising, sustainable pathway for hydrogen production alongside value-added chemical generation from the electrooxidation of EG.
研究领域:
电化学
·
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Yang Zang,Hui Luo,Hang Zhang,Huaiguo Xue
Layered double hydroxides (LDHs), composed of typical lamellar architectures, have become splendid electroactive materials for supercapacitors by means of large specific surface area and high theoretical capacitance. However, severe agglomerations and poor conductivities of single LDHs are disadvantageous to obtain the excellent electrochemical performance. Herein, polypyrrole nanotubes (PNTs) with good conductivity and mechanical capacity were prepared for in situ growth of ZIF-67, and the obtained PNT@ZIF-67 nanocomposites could serve as effective sacrificial templates and Co2+ sources. After a facile solvothermal reaction and acid etching, three-dimension hierarchical PNT-interconnected nickel cobalt-layered double hydroxide (PNT@NiCo-LDH) nanocages were successfully synthesized to construct the supercapacitors, in which the formed networking hierarchical structure could facilitate the uniform distribution of ZIF-67-derived NiCo-LDH nanocages, not only providing an enhanced conductivity and cycling stability but also achieving outstanding specific capacitance (1448.2 F g–1 at 1 A g–1). Additionally, the asymmetric supercapacitor, assembled by positive PNT@NiCo-LDH and negative activated carbon, could achieve an excellent energy density of 64.4 Wh kg–1 at 800 W kg–1 and endure a satisfactory cycling stability with 84.3% capacitance retention over 5000 cycles, which was superior to the electrochemical properties of the NiCo-LDH-dependent asymmetric supercapacitor, showing a promising prospect in high-performance supercapacitors.
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
Vietnam Journal of Chemistry
·
2021
·Vol. 59
·期 6
·813-822
·
IF 0
Nguyen Trung Dung,Vu Dinh Thao,Nguyen Nhat Huy
In this study, the CuCoFe-layered double hydroxide was employed for the degradation of glyphosate in water via peroxymonosulfate (PMS) activation. Scanning electron microscopy, X-ray powder diffraction, energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, and Brunauer-Emmett-Teller analyses were used to characterize the material. The effects of the catalytic system, initial solution pH, and catalyst and PMS dose on the degradation efficiency of glyphosate were investigated. The results indicated that after 6 min the CuCoFe-LDH/PMS system can degrade 99.54 % of glyphosate (100 mg/L) using 100 mg/L of CuCoFe-LDH, 200 mg/L of PMS, and pH 11. In addition, radical quenching experiments prove that the reactive oxygen species (e.g., SO 4 ●- , HO ● , O 2 ●– , and 1 O 2 ) are formed and SO 4 ●- plays a decisive role in glyphosate degradation. Moreover, the CuCoFe-LDH catalyst is reusable and stable with a glyphosate removal efficiency of 90.34 % after five continuous degradation cycles.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
Surfaces and Interfaces
·
2025
·
IF 6.3
Yiwen Chen,Jun Guo,Buming Chen
NiFe LDH exhibits excellent OER performance due to its unique layered structure. However, the limited density of active sites in NiFe LDH hinders further enhancement of OER performance. By introducing surface oxygen defects to modulate the surface functional groups and interfacial active sites of LDHs, the electrocatalytic reaction kinetics are effectively optimized. The introduced oxygen vacancies increase the interface active sites of the NiFe LDH catalysts, thereby improving the interfacial reaction rate and optimizing the catalytic performance. In this work, sulfate-intercalated NiFe 0.3 LDH with abundant oxygen vacancies was synthesized by a co-precipitation method. The abundant oxygen vacancy defects resulted in a reduction in long-range atomic order and crystallinity, leading to the formation of a crystal/amorphous structure. This structural modification optimized the mass transport process during OER, enhanced the electronic configurations of Ni and Fe, and improved their synergistic interactions, thereby increasing the catalytic activity. At a current density of 10 mA cm -2 , a low overpotential of 230 mV and a Tafel slope of 50.7 mV dec ‑1 were achieved. Furthermore, after 40 h of continuous cycling, the overpotential of the NiFe0.3 LDH sample exhibited minimal change. This work provides new insights into the rational synthesis of high-performance OER catalysts with vacancy defects using the co-precipitation method.
研究领域:
材料科学
·
电化学
✓ 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）