JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Ziwei Wang,Liansong Gao,Xiaofei Chen,Haibo Jin,Huangzhao Wei,Lei Ma,Qingyang Gu,Xiaowei Liu
The conventional preparation of layered double hydroxide (LDH) often limits its catalytic effectiveness in advanced oxidation processes due to agglomeration and inadequate exposure of active sites. In this work, we present a simplified synthesis approach that utilizes zeolitic imidazolate frameworks (ZIF)-67 (Co) as a sacrificial template to in situ fabricate hollow polyhedral CoFe-LDH (HP-LDH), aimed at enhancing the degradation of dye contaminants in aqueous systems. The unique porous and polyhedral structure of HP-LDH, derived from the template, facilitates contact efficiency between the substrate and active metal sites, acting as an effective nanoreactor. The comparative degradation experiments of Acid Red 27 (AR27) in peroxymonosulfate (PMS) revealed that the degradation efficiency of HP-LDH was nearly twice that of conventional flake LDH (F-LDH). Under optimal conditions, the HP-LDH/PMS system attained a removal rate of 95% in just 15 min. The degradation of the dye relies on the action of both radical and non-radical species, particularly 1 O 2 . Furthermore, the robust adaptability and versatility of HP-LDH/PMS to real water bodies, with a wide range of pH levels and coexisting inorganic anions, demonstrates its potential as a superior catalyst in wastewater treatment, offering a novel pathway for structural innovation of LDH materials in environmental applications.
研究领域:
环境科学
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材料科学
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PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Ran Duan,Yejun Li,Shen Gong,Yonggang Tong,Zhou Li,Weihong Qi
The development of industrial application of water splitting demands simple and effective methods for the preparation of highly efficient electrocatalysts that are inexpensive and robust. Herein, we report a simple activation method to decorate 3D cobalt iron oxyhydroxide (CoFe-OOH) nanosheets on Co 2 P nanoparticles with Ni foams (NF) as substrates. The synthesized catalysts exhibit excellent activity for electrochemical oxygen evolution reaction due to the hierarchical heterostructures and synergistic effects of CoFe-OOH and Co 2 P. The as-prepared catalysts require a low overpotential of 199 mV to deliver 30 mA cm −2 in oxygen evolution reaction in 1 M KOH with a small Tafel slope of 39 mV dec −1 , indicating favorable kinetics during electrolysis. The synthesized catalysts are further used as cathode and anode for overall water splitting, which only requires a cell voltage of 1.60 V at a current density of 30 mA cm −2 . This work provides new insights on the preparation of efficient electrocatalysts for overall water splitting, which may have the potentials for industrial water electrolysis.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Meng Li,Ying Gu,Yajun Chang,Xiaocong Gu,Jingqi Tian,Xiang Wu,Ligang Feng
Water splitting plays an important role in overcoming the intermittent problems for sustainable energy development, and an efficient non-noble catalyst is highly desired to catalyze the more sluggish half-reaction of oxygen evolution reaction (OER). Herein, we demonstrated the Fe-doped CoF 2 as a novel and efficient catalyst for OER via facile structural transformation derived from the CoFe layered double hydroxide. The crystal structure and surface chemical state analysis indicated the successful structural transformation from CoFe layered double hydroxide to the bulk crystal of CoF 2 doped by Fe. The obtained Fe-CoF 2 nanoflakes largely improved the utilization of active sites and effectively promoted mass transfer. The Fe-CoF 2 -300 showed a low overpotential of 230 mV to achieve the current density of 10 mA cm −2 when loaded on an inert glass carbon electrode, which is about 60 mV less than that of the pristine CoFe layered double hydroxide catalyst. It also exhibited a small Tafel slope of 41.9 mV dec -1 and super catalytic stability. High valence state change from the M−F bond to the M−O bond driven by the OER process was indicated after the long-term stability test indicating the facile active phase formation. This works provides an effective doping strategy to design novel catalysts for decreasing the overpotential and accelerating the kinetics of OER.
研究领域:
材料科学
·
能源化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Liping Wang,Mengqiu Xu,Zhaohang Sun,Xiaolian Liu,Zhe Jia,Sateesh Bandaru,Yixing Li,Yufei Ma,Xuefeng Zhang,Wenli Pei
Developing bifunctional electrocatalysts with high activity and long term durability remains challenging for overall water splitting, mainly due to sluggish reaction kinetics and structural instability under high current densities. Herein, an oxygen vacancy rich RuCoFe-LDH electrocatalyst with low Ru content was successfully fabricated on nickel foam through a one step hydrothermal method. TMAOH inhibition, pH dependent analyses, and isotope labeling DEMS measurements collectively reveal that the synergistic coupling between Ru doping and oxygen vacancies promotes lattice oxygen participation and activates the LOM pathway during OER. Benefiting from the optimized electronic structure, RuCoFe-LDH/NF requires overpotentials of only 212 and 131 mV to reach 10 mA cm −2 for OER and HER, respectively, with corresponding Tafel slopes of 30.7 and 61.7 mV dec −1 . Moreover, the RuCoFe-LDH based electrolyzer achieves 100 mA cm −2 at a cell voltage of only 1.75 V and maintains stable operation for 1000 h during both OER and HER, and the corresponding full electrolyzer also operates stably for 1000 h at 100 mA cm −2 . This work provides an effective strategy for designing high performance LDH based bifunctional electrocatalysts through low content Ru incorporation and oxygen vacancy engineering.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Man Wang,Shichao Chen,Kang Wang,Song Song,Xitao Wang
A Ru-doped CoFe MOF-derived Co 3 O 4 -Fe 2 O 3 heterostructure was fabricated via mild pyrolysis. • The low-temperature strategy preserves the 2D MOF nanosheet scaffold. • Ru incorporation modulates Co/Fe electronic states and suppresses structural aggregation during mild pyrolysis. • Ru 0.024 CoFe MOF-250 requires only 227 mV at 20 mA cm −2 with a Tafel slope of 33.67 mV dec −1 . • Excellent durability is demonstrated by only 8.3 mV potential increase after 100 h at 20 mA cm −2 . Metal-organic frameworks (MOFs) are promising for the oxygen evolution reaction (OER), yet they suffer from framework collapse and active-site aggregation during high-temperature pyrolysis. Herein, a Ru-doped CoFe MOF is grown in situ on nickel foam (NF) and subsequently annealed at 250 °C, forming a Co 3 O 4 -Fe 2 O 3 @Ru 0.024 CoFe MOF heterostructure. The incorporation of Ru modulates the local electronic structure of the Co/Fe centers, while mild annealing at 250 °C generates Co 3 O 4 -Fe 2 O 3 nanophases within the partially preserved MOF nanosheet scaffold. This creates intimate heterointerfaces that facilitate rapid charge transfer. In 1.0 M KOH, the optimized electrode delivers a current density of 20 mA cm -2 at an overpotential of only 227 mV, exhibits a low Tafel slope of 33.67 mV dec −1 , and achieves an electrochemical surface area (ECSA) of 133.5 cm 2 . After 100 h of operation at 20 mA cm −2 , the potential increases by merely 8.3 mV. This work presents an effective strategy that combines Ru doping with mild pyrolysis to construct efficient and stable MOF-based OER electrocatalysts.
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DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2026
·
IF 3.6
Xinquan Zhao,Shisheng Li,Xinshu Zhang,Zhi Gao,Yi Du,Wanying Lei
Exploring efficient, stable, and earth-abundant electrocatalysts toward the oxygen evolution reaction (OER) is a central theme for realizing industrial application of water splitting. In this study, a 1D@2D heterostructure of Co 9 S 8 -Ni 3 S 2 @CoFe LDH/NF is constructed via hydrothermal and electrodeposition approaches, where ultrathin CoFe LDH nanosheets are interconnected and deposited onto Co 9 S 8 -Ni 3 S 2 nanorod arrays. This 1D@2D microstructure benefits from the exposure of a large number of accessible reactive sites. The strong interaction between the sulfide hybrid and LDH material could modulate the electronic structure of Co 9 S 8 -Ni 3 S 2 @CoFe LDH and generate a high concentration of high-valence metal sites. As a result, the optimal catalyst exhibits superior OER performance with a low overpotential of 189 mV at 10 mA cm −2 , a small Tafel slope of 30.22 mV dec −1 , and good stability in alkaline solution. This work opens up a possibility for obtaining efficient and cost-effective electrocatalysts for clean energy production through water splitting. Graphical Exploring efficient, stable, and earth-abundant electrocatalysts toward the oxygen evolution reaction (OER) is a central theme for realizing industrial applications of water splitting. In this study, a 1D@2D heterostructure of Co 9 S 8 -Ni 3 S 2 @CoFe LDH/NF is constructed via hydrothermal and electrodeposition approaches, where ultrathin CoFe LDH nanosheets are interconnected and deposited onto Co 9 S 8 -Ni 3 S 2 nanorod arrays. This 1D@2D microstructure benefits from the exposure of a large number of accessible reactive sites. The strong interaction between the sulfide hybrid and LDH material could modulate the electronic structure of Co 9 S 8 -Ni 3 S 2 @CoFe LDH and generate a high concentration of high-valence metal sites. As a result, the optimal catalyst exhibits superior OER performance with a low overpotential of 189 mV at 10 mA cm −2 , a small Tafel slope of 30.22 mV dec −1 , and good stability in alkaline solution. This work opens up a possibility for obtaining efficient and cost-effective electrocatalysts for clean energy production through water splitting.
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PubMed
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Luobai Yang,Wenxiang Liu,Xiaoxiang Hu,Zhiwang Sun,ZhenZhen Chen,Jinnong Wang,Ze Wang,Dongye Zhao,Yong Li,Shifeng Wang
Electrolysis for hydrogen production, a green and environmentally friendly method, still faces significant challenges. To achieve large-scale commercialization, a catalyst with long-term stability, large current density, high activity, and low cost is needed. In this study, a simple hydrothermal method is employed to prepare a nonprecious metal-based catalyst of molybdenum disulfide (MoS2) and CoFe-layered double hydroxide (CoFe-LDH) grown on the surface of nickel foam (NF). The rich porosity of NF and the lamellar structure of CoFe-LDH provide abundant active sites and promote bubble escape. The MoS2 on the CoFe-LDH surface not only further enhances the conductivity of CoFe-LDH but also provides additional electrochemical active surface area (ECSA) with its fluffy structure while modulating the electronic structure of the reactive active sites. These advantages make the sample MoS2/CoFe-LDH/NF exhibit substantially low overpotentials of 224/255/278 mV for oxygen evolution reaction (OER) and 211/297/331 mV for hydrogen evolution reaction (HER) at current densities of 10/50/100 mA cm–2, respectively, low Tafel slopes of 57.91 mV dec–1 for OER, and 113.17 mV dec–1 for HER. Moreover, the electrocatalyst presents good stability with no significant degradation after 250 h for OER and 200 h for HER at a large current density of 150 mA cm–2. In full water electrolysis, it only requires 1.70 V to achieve a current density of 10 mA cm–2. This study opened up a method for the design and synthesis of highly efficient bifunctional electrocatalysts for oxygen and hydrogen production.
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高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 6
·e202405300
·
IF 2
Chuanda Ruan,Limeng Zhang,Ziyan Song,Xiaodan Zheng,Lifeng Han,Zhifei Fu,Qinwei Guo,Meng Wang,Fei Tian
Graphical This study focuses on the preparation of a magnetic catalyst with a composite structure, achieved through a series of pretreatments and calcination using bimetallic ions in a nitrogen atmosphere. The findings indicate that the magnetic catalyst not only exhibits remarkable reusability but also effectively degrades levofloxacin via multiple mechanisms. Antibiotics, Biomass, Heterogeneous catalysis. To mitigate pollution caused by levofloxacin (LVF) in aquatic environments, a magnetic catalyst, CoFe 2 O 4 /CoFe@BC (CF@BC), was synthesized using loofah-derived biochar (BC) as a support, through coprecipitation followed by calcination at high temperatures. CF@BC was utilized for the degradation of LVF in aqueous solutions containing peroxymonosulfate (PMS), requiring no additional energy input. CF@BC demonstrates exceptional catalytic performance, even under acidic conditions, achieving a degradation rate of 98% within 4 min. Compared to pure CoFe 2 O 4 nanoparticles (CF), CF@BC exhibits smaller particle sizes and improved dispersion properties, enhancing the exposure of reactive sites. The degradability of the CF@BC/PMS system is nearly three times greater than that of the CF/PMS system under identical conditions. Furthermore, the CF@BC/PMS system demonstrated effective degradation of LVF across a wide initial pH range (3 to 9) and maintained high degradation efficiency after three cycles. Both Co(II)/Co(III) and Fe(III)/Fe(II) are involved in the activation process of PMS, with SO₄ •− and 1 O₂ being the predominant species contributing to degradation. Additionally, two pathways for the degradation of LVF have been proposed. The CF@BC/PMS system developed in this study can be effectively applied to remediate water contaminated by LVF.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xu Chen,Jinyu Zhao,Zhenxin Zhao,Wensheng Zhang,Xiaomin Wang
Developing electrocatalysts with high activity and robust performance for large-scale seawater electrolysis to produce hydrogen holds immense significance. Herein, a highly active bifunctional electrode composed of amorphous cobalt-iron layered double hydroxides (CoFeLDH) and crystalline nickel phosphide (Ni 2 P) (denoted as CoFeLDH@Ni 2 P), is employed to boost hydrogen production through seawater electrolysis. The strong interface coupling effectively modifies the electronic structure at active sites, thereby accelerating the catalytic reaction kinetics. Impressively, in situ Raman and post-stability analyses demonstrate a unique reconstruction behavior on the CoFeLDH@Ni 2 P electrode. Bimetal co-incorporated NiOOH (CoFe-NiOOH) and Ni(OH) 2 species are formed during the oxygen evolution reaction (OER), while CoFeLDH@Ni 2 P can transform into Ni(OH) 2 species during the hydrogen evolution reaction (HER) process. Furthermore, the highly negatively charged surface selectively rejects Cl − ions by formed PO 4 3− , endowing CoFeLDH@Ni 2 P with excellent tolerance and promising durability in saline electrolytes. Consequently, the CoFeLDH@Ni 2 P electrode exhibits an overpotential of 106 mV for HER at 10 mA cm −2 and 308 mV for OER to achieve 100 mA cm −2 in 1.0 M KOH solution. Additionally, the CoFeLDH@Ni 2 P (+,-) electrolyzer requires a low cell voltage of 1.56 V to deliver 10 mA cm −2 in 1.0 M KOH + Seasalt. This work presents an appealing strategy for the rational design of advanced electrocatalysts with amorphous-crystalline interfaces, which reveals the source of the activity of transition-metal phosphating compounds in saline water electrolysis.
研究领域:
材料科学
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电化学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jingjing Liu,Liuwei Shi,Yu Shi,Qi Zeng,Yajie Yang
Co-ZIF is widely believed as a promising material which shows potential in MOFs based enzyme-free sensors. However, the research of Co-ZIF in glucose sensor filed has been hampered, due to its poor electronic conductivity and slow ion diffusion caused by closed rhombohedral dodecahedron structure. In this work, the obtained Co 0.95 Fe 0.05 -ZIF presents highly opened nanosheet structure on CC, resulting in rich open active sites and ions moving channels. Compared with other reported ZIFs, the Co 0.95 Fe 0.05 -ZIF/CC exhibits excellent sensing performance with a high sensitivity of 3232.30 μA mM −1 cm −2 in the range of 0.20–1.00 mM and a low detection limit of less than 5 μM, due to its highly opened nanosheet structure. The Co 0.95 Fe 0.05 -ZIF/CC also shows excellent selectivity, repeatability and reproducibility for glucose detection. Furthermore, the variation trend of test results measured by this saliva sensor without any sample pre-treatment, is consistent with that of commercial blood glucose meter, indicating its potential in real applications. This synthesis strategy also provides a new direction of structure construction for high performance MOFs in enzyme-free glucose sensor field.
研究领域:
生物医学工程
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材料科学
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DOI
高影响因子
AICHE JOURNAL
·
2022
·Vol. 68
·期 10
·e17785
·
IF 4.167
Xuliang Lin,Jianglin Liu,Linjun Wu,Liheng Chen,Yi Qi,Zhongjie Qiu,Shirong Sun,Huafeng Dong,Xueqing Qiu,Yanlin Qin
Exploring highly active and stable electrocatalysts for oxygen evolution reaction (OER) is crucial for developing water splitting and rechargeable metal-air batteries. In this study, a hybrid electrocatalyst of CoFe alloy and Co x N heterojunction encapsulated and anchored in N-doped carbon support (CoFe-Co x N@NC) was in situ coupled via the pyrolysis of a novel coordination polymer derived from lignin biomacromolecule. CoFe-Co x N@NC exhibited outstanding OER activity with a low overpotential of 270 mV at 10 mA cm −2 and stability with an increment of 20 mV, comparable to commercial Ir/C. DFT calculations showed that Co x N and N-doped graphitic encapsulation can reduce the binding strength between *O and CoFe alloy, limit metal leaching and agglomeration, and improve electron transfer efficiency, considerably enhancing the OER activity and stability. In situ coupling approach for preparing alloy and nitride heterojunctions on N-doped lignin-derived carbon offers a promising and universal catalyst design for developing renewable energy conversion technologies.
研究领域:
材料科学
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能源化学
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计算化学
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
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IF 8.4
Ting Zhu,Bo Wu,Jing Xie,Hongran Yang,Weibin Zhang,Yanyan Sun
Hierarchical structured p–n heterojunctions comprising cuprous oxide nanowire cores (Cu2O NW) and CoFe-layered double hydroxide (CoFe LDH) nanosheet shells on copper foam (CF) substrates were constructed by in situ wet–chemical reactions with subsequent electrodeposition. The synergistic effect of the superior light-harvesting ability of Cu2O and the built-in electric field generated by the Cu2O/CoFe LDH p–n heterojunction is verified to facilitate the efficient separation of photogenerated electrons and holes by promoting the rapid transfer of photogenerated charge carriers. Benefiting from the advantages above, the optimal CF@Cu2O NW/LDH-3 exhibits light-enhanced catalysis toward the hydrogen evolution reaction (maximum enhancement of 14.4%) and oxygen evolution reaction (maximum enhancement of 7.4%) for water splitting. Moreover, the alkaline electrolytic cell based on the optimal CF@Cu2O NW/LDH-3 requires an operating potential of only 1.62 V to drive a high current density of 100 mA cm–2 under illumination. Meanwhile, a current density retention of up to 91.62% can be reserved after a stability test for 24 h. This work provides ideas for the design of transition metal-based catalytic materials for photodriven electrochemical water splitting.
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高影响因子
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