INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Yiping Wang,Yixin Xu,Zhaoqun Gao,Siraj Ullah,Ying Li,Na Su,Shuozhen Hu,Xinsheng Zhang
Low formate Faradaic efficiency (FE) and poor methanol-to-formate electrooxidation reaction (MOR) stability under high potentials restrict commercialization of coupling MOR with hydrogen evolution reaction (HER), which generates hydrogen and high-value-added formate simultaneously with low energy consumption. Herein, we synthesized a nanoflower-structured NiMnCu-LDH as bifunctional catalyst for both MOR and HER. Adding Cu suppresses oxygen evolution reaction (OER) and elevates Ni 3+ content by promoting electron transfer from Ni 2+ to Mn 3+ . NiMnCu-LDH exhibits high MOR activity with potentials of 1.33/1.36 V RHE at 10/100 mA cm −2 , high formate selectivity with over 95 % FE at potential exceeding 1.50 V RHE , and superior durability for at least 120 h in alkaline media. Furthermore, NiMnCu-LDH exhibits excellent HER performance with an overpotential of 76.45 mV at 10 mA cm −2 with the existence of methanol. Producing hydrogen and formate is successively achieved by applying NiMnCu-LDH as both anode and cathode simultaneously for methanol electrolysis in a non-diaphragm electrolyzer.
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高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 12
·832
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IF 5.3
Li Jiejun,Zhao Yixian,Huang Jiaxin,Wang Jiamin,Zhang Rongxia,Ni Meijun,Zhao Pengcheng,Fei Junjie,Xie Yixi
A highly sensitive electrochemical sensor for chlorogenic acid (CGA) detection has been developed using nitrogen-doped carbon nanorods loaded with NiCo bimetallic (NCNRs/NiCo). The composite material was synthesized through a pyrolysis strategy where NiCo-layered double hydroxide (LDH) was grown in situ on phenolic resin-derived carbon nanorods and subsequently carbonized. Material characterization confirmed the successful formation of uniformly dispersed NiCo nanoparticles anchored on nitrogen-doped carbon matrix, which provided abundant active sites. The NCNRs/NiCo-modified glassy carbon electrode (GCE) exhibited exceptional electrocatalytic activity toward CGA oxidation, achieving a wide linear detection range from 0.5 nM to 10 µM with an ultralow detection limit of 0.32 nM (S/ N = 3). The sensor demonstrated excellent selectivity against common interferents, good reproducibility and repeatability. Practical application in food samples showed satisfactory recoveries (97.6-104.1%) in good agreement with the ultraviolet-visible (UV-Vis) reference method. The outstanding performance originates from the synergistic effects between nitrogen-doped carbon framework and bimetallic nanoparticles, offering a promising platform for natural antioxidant determination in food quality control. Graphical
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PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Jiawen Zhu,Mengying Xia,Zhenzhen Liu,Yi Yuan,Qianqian Lv,Huina Zhou,Minghua Lu
Due to persistence, high toxicity, and tendency to bioaccumulate of polychlorinated biphenyls (PCBs), accurate detection of their residual levels in environmental and food samples is particularly important. To address the challenges posed by complex sample matrices and trace analytes, a new hierarchically porous (micro/mesoporous) carbon nanosheet (HPC-NS) material was designed as sorbent. The HPC-NSs were synthesized using cobalt-based ZIF-67 as self-sacrificial template and layered double hydroxide (LDH) as substrate. These HPC-NSs were applied as fiber coating material for solid-phase microextraction (SPME) to extract and enrich trace amounts of PCBs. By combining headspace SPME with GC–MS/MS, a highly sensitive method was developed for the detection of PCBs in green tea and milk. The proposed method demonstrated a wide linear range (0.2–5000 ng·L −1 ) and low detection limits (0.02–0.06 ng·L −1 ). Experimental results indicated that the HPC-NSs exhibit excellent extraction efficiency toward PCBs, which can be attributed to multiple mechanisms including pore filling, π–π stacking, cation–π interactions, and polar interactions. This work not presents a promising SPME coating material but also offers a robust and sensitive analytical method for detecting trace PCBs in complex matrices.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
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IF 9.965
Wentao Liu,Qiu Wang,Zhi Liu,Guixiang Ding
A series of treble NiAl-LDH/g-C 3 N 4 /carbon quantum dots (LDH/CN/CQDs) photocatalysts is successfully prepared for the photoreduction of CO 2 to CO via a facile hydrothermal pathway. In the 3D flower-like LDH/CN/CQDs, CQDs not only achieve the efficient inhibition of charge recombination but also act as the unhindered “electronic bridges” to synergistically construct a classical type-Ⅱ charge transfer configuration, which synchronously permits the effluence of photogenerated electrons from CN to LDH and holes from LDH to CN, and promotes ultraviolet–visible irradiation respondence. The sample of LDH/CN/CQDs-6 is the optimal one amongst the LDH/CN/CQDs with a larger special surface area (98.43 m 2 g −1 ) and an appropriate content of CQDs (66.9 wt%), exhibiting the highest CO evolution rate (5.2 μmol·g −1 ·h −1 ) under visible light irradiation without any sacrificial agent or photosensitizer in water. This is 26.8- and 20.9-fold higher than those of the pristine LDH , pure CN, and their binary counterparts, respectively, and also outperforms most reported LDH-based photocatalysts. As unhindered electron conduction bridges, the highly dispersed CQDs in the LDH/CN heterojunction significantly increase utilization efficiency of light energy and separation efficiency of photogenerated electron-hole pairs. This work provides a beneficial attempt to integrate CQDs with LDH/CN for the positive synergetic effect on both photoelectric properties and electron transfer to obtain highly enhanced photocatalytic activity of CO 2 into CO, and expected to be extended towards broader photocatalytic applications.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Yu Zhang,Wangfeng Cai,Yajie Guo,Yan Wang
In this work, a nanosheet-assembled core-shell structure composite of Co-Ni-S@CoNi-LDH was prepared on Ni foam via hydrothermal synthesis , in which Co-Ni-S nanowires as cores were assembled with the shell of CoNi-LDH nanosheets. The combination of the high conductivity of Co-Ni-S, the high specific surface area of CoNi-LDH and the multivalent state of Ni and Co provided more active sites, short and effective ion transport paths, and great synergy, which played significant roles in the excellent performance of Co-Ni-S@CoNi-LDH. Meanwhile, the nanosheet-assembled core-shell structure improved the overall stability. Based on the characterisation and the performance measurements, the Co-Ni-S@CoNi-LDH electrode showed an excellent electrochemical performance. The Co-Ni-S@CoNi-LDH electrode acquired a specific capacitance of 2414 F/g at a 1 A/g current density and a high cycle stability with an 89.7% retention after 3000 cycles. The assembled hybrid supercapacitor Co-Ni-S@CoNi-LDH//AC delivered a high energy density of 59.11 Wh kg −1 at an 855.43 W kg −1 power density, as well as an excellent rate performance of 81% after 5000 cycles at a 5 A/g current density, showing good potential for practical applications.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Changhui Liang,Yuxin Zhang,Jun Shen,Xiaoqiang Zhang,Huixiang Li,Songhai Xie,Yongxin Li,Z. Conrad Zhang
The development of bifunctional electrocatalysts with high efficiency for overall water splitting is still a challenging task. In this work, we introduce a novel one-step synthesis method for Pt/NiFe layered double hydroxide (LDH) on an iron-nickel foam (INF) substrate under mild conditions. This method eliminates the need for additional Ni or Fe ions and facilitates in-situ etching and growth processes under mild conditions, resulting in a higher active surface area, well-dispersed low-loading Pt nanoparticles, and a self-supported electrode without binders. These features collectively enhance electron transfer and catalytic activity for both HER and OER. The Pt/NiFe LDH/INF exhibits remarkable water splitting performance, requiring a cell voltage of only 1.44 V at10 mA cm −2 when used as both anode and cathode. Additionally, it remains stable at 20 mA cm −2 for at least 16 h. The exceptional water splitting activity of Pt/NiFe LDH/INF in alkaline solution can be attributed to the synergistic effects of Pt and NiFe LDH, which improve the hydrogen evolution reaction and oxygen evolution reaction efficiencies. The results provide valuable insights into designing bifunctional electrocatalysts with low Pt loading for optimal water splitting performance at low operating cost.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Jiangfu Zheng,Changzheng Fan,Xiaoming Li,Qi Yang,Dongbo Wang,Abing Duan,Shuaijun Pan
Photocatalysts based on crystallographic effects and visible light-driven tunable nanostructures have been confirmed as a novel, scalable, and easy-to-implement technology. The hydrothermal reaction serves as the main method of synthesis for its novelty, becoming a viable alternative to other complex physical and chemical processes. In this study, hydrothermal conditions' parameters were set for nanostructured Cu 2 O/ZnAl-LDH photocatalysts. The nanostructured I-scheme Cu 2 O/ZnAl-LDH photocatalysts were prepared with an intercalated morphology. The prepared photocatalysts became the most effective photocatalyst for mineralizing and degrading nitenpyram solution, achieved nearly complete degradation and exceptionally high mineralization values (>40%) after 210 min of reaction, and exerted some ex vivo antibacterial, sterilising effects and potential for treating waste leachate (removal = 78%). The synergistic effect of Cu 2 O/ZnAl-LDH with both crystalline surface effect and intercalation structure can lead to reusability, high stability, versatility, and excellent photocatalytic performance in mineralize neonicotinoid pesticides.
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高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Yang Yang,Yuwen Ma,Chao Sun,Chaomeng Bu,Yue Yan,Xianfu Li
Transition-metal oxides (TMOs) exhibit exceptional potential as candidate materials in supercapacitor applications. Nevertheless, their actual performance falls far short of expectations due to challenges such as poor electronic conductivity, insufficient electrochemical durability, and the scarcity of active sites within TMOs. Herein, we successfully synthesized a NiMoO4 nanorod@NiMn-LDH nanosheet core–shell structure onto nickel foam (NiMoO4@NiMn-LDH/NF) via a straightforward two-step hydrothermal process, achieving complementary enhancement in performance. The core–shell architecture effectively shortens ion transport pathways and exposes abundant active sites, which establish a vital basis for boosting the energy storage efficiency of devices. Additionally, the notable synergistic effect among transition-metal ions further boosts the electrochemical performance. Consequently, the NiMoO4@NiMn-LDH/NF electrode exhibits an impressive areal capacitance of 9438.4 mF cm−2 under 2 mA cm–2. Moreover, it features pre-eminent rate capability and preserves 99.9% of its capacitance over 6000 cycles. Significantly, the constructed NiMoO4@NiMn-LDH/NF//activated carbon configuration achieves a 1.2 mW h cm–2 high energy density under a 3.2 mW cm–2 power density, sustaining 95% superior capacitance retention over 7000 cycles. Our research demonstrates that the NiMoO4@NiMn-LDH core–shell nanocomposite offers an excellent and feasible strategy for the energy storage field.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Zihan Wei,Xiaoqian Ren,Tianhong Mei,Rongcheng Xiang,Wugan Wei,Xiaorui Yang,Yan Fang,Wenlong Xu,Jianliang Zhu,Jinhua Liang
In this study, various of MgFeTi-LDH/g-C3N4 photocatalytic materials had been successfully synthesized through self-assembly, and the physicochemical and photoelectric properties were thoroughly characterized. Optical performance characterizations of band gaps and VB-XPS spectra revealed that the EVB and ECB alignment of MgFeTi (3:1)-LDH/g-C3N4 composites are consistent with the fundamental characteristics of S-type heterojunctions. MgFeTi (3:1)-LDH/g-C3N4 coupled with sodium persulfate activation for TCH degradation achieved nearly 100% removal efficiency under visible light, surpassing previously reported catalysts. Moreover, five repeated tests of MgFeTi (3:1)-LDH/g-C₃N₄ showed negligible change in the removal rate of TCH, indicating its potential value for industrial applications. Furthermore, the catalytic degradation pathway and mechanism for MgFeTi (3:1)-LDH/g-C3N4 have been elucidated through LC-MS analysis, radical capture, and characterization. In addition, the high efficiency of TCH degradation is attributed to the synergy of Fe3+、Fe2+, SPS, and active species such as •OH, SO4•−, and •O2−. Finally, the QSAR analysis and OD600 values suggest that the degradation pathway and time lead to a reduction in toxicity and the potential risk to the degradation liquid. This study offers simple, economical approach to completely degradation TCH, also providing practical application prospects in wastewater treatment.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Yong Yang,Jiajia Wu,Tingting Xiao,Zheng Tang,Jinyou Shen,Haijin Li,Yong Zhou,Zhigang Zou
A unique urchin-like CoZnAl-LDH/RGO/g-C 3 N 4 (LDH/RGO/CN) Z-scheme photocatalyst, which is fabricated by the hydrothermal synthesis of CoZnAl-LDH and the in situ loading of RGO and g-C 3 N 4 , is developed for the photocatalytic conversion of CO 2 . The special spiny external surface and hollow inner cavity endow LDH/RGO/CN with a significantly enhanced light-harvesting capacity. The well-distributed g-C 3 N 4 nanosheets on the CoZnAl-LDH nanoplates, combined with RGO as an electron mediator, constructs an excellent heterosystem with numerous interfaces, efficient charge separation and highly exposed catalytic active sites. The Z-scheme charge-transfer process promotes the oxidizability and reducibility of CoZnAl-LDH and g-C 3 N 4 . Furthermore, the synergistic effect among the components contributes to intense adsorption and chemical activation towards CO 2 , which reduces the reaction barrier for CO 2 photoreduction. As a result, the optimized LDH/RGO/CN exhibits highly efficient and selective photocatalytic CO 2 conversion to CO. The special 3D urchin-like architecture paves a new way for design of photocatalyst with ideal performance.
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高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Jie Qin,Zhihan Zhang,Wenhui Yao,Liang Wu,Long Li,Ke Wang,Yuan Yuan,Zhihui Xie,Yuansheng Yang,Viswanathan S. Saji,Fusheng Pan
Conventional Mg Al layered double hydroxide (LDH) monolayers offer insufficient space to accommodate the lubricants required for slippery liquid-infused porous surfaces (SLIPSs). Therefore, Mg-MOF-74 was deposited onto the as-prepared Mg Al LDH, to construct an LDH/MOF composite-layered structure, which increased the storage capacity of lubricants and imparted AZ31 Mg alloy with enhanced anti-corrosion and self-healing performance. Notably, the as-synthesized Mg-MOF-74 featured abundant open metal sites, facilitating the loading of 8-hydroxyquinoline (8-HQ) corrosion inhibitor. Specifically, 8-HQ could be loaded both in the interlayers of Mg Al LDH and open Mg sites of Mg-MOF-74. Due to the effective incorporation of 8-HQ and better insulation of a thicker lubricant layer, the LDH/MOF composite-layered SLIPS exhibited the best corrosion resistance with a corrosion current density of 5.13 × 10 −10 A·cm −2 . Furthermore, its self-healing performance was assessed by scanning vibration electrode technique and subsequent electrochemical measurements. Results indicated that the artificial scratch on the composite coating was fully repaired after 24 h of immersion in 3.5 wt% NaCl, with its impedance modulus (1.75 × 10 8 Ω·cm 2 ) restored to the same order of magnitude as that of the non-scratched specimen. This was primarily attributed to the physical self-healing of lubricants and chemical self-healing via the “gradual release & layer-by-layer deposition” of Mg 2+ and 8-HQ. Thus, the as-fabricated composite SLIPS coating demonstrates significant industrial application potential.
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高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Xueqi Zhang,Shichao Chen,Kang Wang,Zhongli Tang,Xitao Wang
The preparation of non-precious metal catalysts employed in oxygen evolution reaction (OER) is of great important for hydrogen production via electrocatalytic water splitting. In this work, a 2D/2D CoFe LDH/MOF heterostructure was constructed on nickel foam (NF) by in-situ partial conversion of CoFe MOF to CoFe LDH, and evaluated as an effective OER catalyst. Owing to the unique 2D/2D heterostructure, substantial electrochemical active surface area (ECSA), superior electron conductivity, accelerated mass/charge transfer kinetics and synergistic effect between the two materials, LDH/MOF-6 h sample combining structural features of both MOF and LDH exhibited a lowest overpotential of 257 mV, a small Tafel slope of 50.71 mV·dec ‑1 at 20 mA cm -2 current density, along with a highest ECSA of 108 cm 2 (27,000 cm 2 g -1 ). Moreover, LDH/MOF-6 h sample demonstrated superior stability over 100 h of continuous reaction in alkaline electrolyte, which indicates that 2D/2D CoFe LDH/MOF heterostructure is a highly future-oriented material for OER applications.
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高影响因子
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