JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Qiudi Mao,Zhishan Li,Hua Wang,Kongzhai Li,Chao Liu
Advances in hydrogen energy technology require the urgent development of electrocatalysts suitable for urea-assisted and overall water splitting. This study successfully synthesized a trifunctional electrocatalyst featuring an iridium-doped NiV LDH structure via a simple hydrothermal method. NiVIr LDH-4 shows remarkable trifunctional catalytic activity. It operates stably for over 100 h at a current density of 100 mA cm −2 in HER, OER, and UOR processes, as well as in overall water splitting and urea-assisted water splitting systems. These results provide a promising strategy for the development of advanced electrocatalysts that enable energy‑efficient hydrogen production alongside simultaneous remediation of urea‑laden wastewater.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Li Zhang,Jin Liang,Yaxi Zhang,Tian Lei,Guang Yang,Yunfeng Li
This work addresses the critical challenges of expensive noble-metal catalysts and inferior conductivity of transition metal hydroxides in water electrolysis by developing in-situ grown NiMn layered double hydroxide (NiMn LDH/NF) self-supported electrodes through one-step electrodeposition on nickel foam. The engineered 2D porous nanosheet architecture delivers abundant active sites, achieving exceptional hydrogen evolution reaction (HER) performance with 17 mV overpotential at 10 mA cm-2. Furthermore, cerium doping strategy effectively regulates nucleation kinetics through Ce3+/Ce4+ redox couples, constructing flower-like hierarchical Ce-NiMn LDH/NF architecture. The optimized electronic structure and enhanced surface hydroxylation significantly boost oxygen evolution reaction (OER) kinetics, requiring merely 212 mV overpotential to deliver the current density of 50 mA cm-2. The NiMn LDH/NF||Ce-NiMn LDH/NF electrolytic system demonstrates exceptional performance for overall water splitting, achieving an ultralow cell voltage of 1.44 V at 10 mA cm-2. Remarkably, it retains 97.66 % of its initial activity after 100 h of continuous operation, underscoring the efficacy of the rare-earth cation-doped structural engineering strategy. This approach enables the rational design of high-performance, durable, and cost-effective electrocatalytic systems by synergistically optimizing electronic configurations, active site accessibility, and long-term stability.
研究领域:
电化学
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材料科学
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能量存储与转换
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催化
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纳米材料
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可再生能源
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2020
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IF 7.183
Yanping Dong,Chong Lin,Shoujian Gao,Narmadha Manoranjan,Wenxian Li,Wangxi Fang,Jian Jin
Graphene oxide (GO) has been intensively adopted as the building block of separation membranes due to its excellent mechanical strength and atomic scale interlayer spacing. However, the practical application of GO nanosheet-based membranes are limited by the swelling and disintegration of GO membranes in water owing to hydration and electrostatic repulsion. In this work, we firstly fabricated a type of layered double hydroxide (LDH) nanosheets, Co(OH) 2 nanosheets, by in-situ growth on the surface of GO nanosheets, followed by coating such GO/Co(OH) 2 hybrid nanosheets on a microporous substrate through vacuum suction to form a single-layered GO/Co(OH) 2 hybrid thin membrane. The electrostatic and coordination interactions between GO and Co(OH) 2 nanosheets are found to stabilize the GO/Co(OH) 2 hybrid membrane in water, and the hybrid membrane shows good resistance to shear force in a pressurized crossflow nanofiltration system with crossflow speed as high as 0.5 m s −1 . With permeation flux up to 17.0 L m −2 h −1 , >91% rejection to inorganic salts like Na 2 SO 4 and >98% rejection to various organic dyes (transmembrane pressure: 6 bar, crossflow speed: 0.27 m s −1 ), the hybrid membrane also survives the challenges of different pH environments, elevated transmembrane pressure and a 60 h continuous crossflow test. Such significantly improved stability from pure GO membranes is expected to enable the 2D nanomaterial based membranes for practical filtration applications in the water industry.
研究领域:
材料科学
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环境工程
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高影响因子
RARE METALS
·
2024
·Vol. 43
·期 6
·2613-2622
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IF 9.6
Zhang Bao-Jie,Chang Bin,Qiu Shi-Peng,Zhao Gang,Wang Xiao,Xu Xi-Jin,Mu Lan,Liao Wen-Bo,Dong Xiao-Jing
To effectively address energy challenges, it is crucial to explore efficient and stable bifunctional non-precious metal catalysts. In this study, a Mo-doped nickel–iron layered double hydroxide with flower-cluster architecture was successfully prepared by a one-step hydrothermal method, which demonstrated a good water splitting performance. After an appropriate amount of Mo doping, some lattice distortions in the material provided reactive sites for the adsorption and conversion of intermediates, thus optimising the charge distribution of the material. Moreover, the multidimensional void structures formed after doping had a larger specific surface area and accelerated the penetration of the electrolyte, which significantly improved the activity of the catalyst in alkaline media. At 10 mA·cm −2 , the hydrogen and oxygen evolution overpotentials of Mo-doped nickel–iron double hydroxides (Mo–NiFe LDH/NF-0.2) were 167 and 220 mV, respectively, with an excellent durability up to 24 h. When the Mo–NiFe LDH/NF-0.2 catalyst was used as the cathode and anode of an electrolytic cell, the catalyst achieved a current density of 10 mA·cm −2 at an applied voltage of 1.643 V. This study provides a novel approach for designing excellent bifunctional electrocatalysts containing nonprecious metals. Graphical abstract
研究领域:
能源转换
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材料科学
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电化学
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催化
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纳米技术
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高影响因子
APPLIED CLAY SCIENCE
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2022
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IF 5.907
Tianqi Yuan,Miao Chen,Xiaotong Sun,Jianping Guan,Fawei Zhu,Kai Tang,Zhipeng Zhang,Qi Liu,Xiaoqing Chen
Designing chiral adsorption separation material with high enantioselectivity and stability is a promising route to realize the enantioselective recognition and separation of racemic molecules. Here, for the first time, camphor sulfonic acid derivatives (CSA) were synthesized as a chiral resolving agent, and it was modified on Mg/Al layered double hydroxide (Mg/Al-LDH) through electrostatic self-assembly to construct functionalized chiral adsorption separation material (CSA@LDH), which could be served as an adsorbent for enantioselective recognition and separation of propranolol enantiomers ( R,S -PRO). The CSA@LDH maintained the advantage of limited chiral space in layered structures to achieve the selective enrichment of R -PRO, and the e.e. % value of single separation could reach 19.5%. Meanwhile, density functional theory (DFT) calculations supported that chiral recognition and separation were ascribed to the discrepancy in affinities stemming from the difference of π-π interaction force and hydrogen bonding capacity of CSA with R,S -PRO. Hence, considering the superior ability of hydrogen bond coordination and stereocontrol of camphor sulfonic acid derivatives, it is expected to be more widely used as a chiral resolving agent for other enantiomeric recognition and separation.
研究领域:
化学
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材料科学
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药物化学
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高影响因子
APPLIED SURFACE SCIENCE
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2023
·
IF 6.7
Yonghuan Zhao,Yang Meng,Pengxiang Yu,Xiaoxiao Hu,Juanjuan Su,Jian Han
The demand for photothermal fabrics requires more efficient photothermal nanoparticles and more stable interface binding fastness. Nanohybrid coating is considered as used as an efficient method to reach the goal. In this study, a nanohybrid of reduced graphene oxide-zinc-aluminum layered double metal hydroxide (RGO-LDH) was filled to WPU coating to prepare the photothermal textiles. RGO-LDH nanohybrid was surface modified by polydopamine (PDA) to improve the dispersion in WPU. In comparison to the pure WPU film, the WPU nanocomposite film exhibited enhanced water resistance, mechanical properties, and scratch resistance with the inclusion of nanohybrid filler at a 1 wt% concentration. Furthermore, the nanohybrid/WPU coated fabric showed excellent anti-ultraviolet (anti-UV) and photothermal conversion performance. The surface temperature of the nanohybrid/WPU coated fabric rose to 64 °C when exposed to a xenon lamp. After undergoing various durability tests including wearing, washing, folding, and bending, it was confirmed that the modified fabric had outstanding photothermal stability. This work provides a new strategy to fabricate the photothermal textile with excellent warming effect and weather resistance.
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高影响因子
FUEL PROCESSING TECHNOLOGY
·
2023
·
IF 7.5
Jie Xu,Xiaowei Liu,Rui Li,Boxiong Shen,Zijian Zhou,Lidan Deng,Lei Liu,Xinbo Zhu
Converting CO 2 into renewable fuel via photocatalysis is of significance to solving the energy crisis and climate change. However, the limited electron transfer in single catalysts always limits the reduction reaction. In this work, a p-n heterojunction was constructed between Cr doped MgAl–LDH (abbreviated as LDH) and Co 3 O 4 for visible-light-driven fuel production. Since LDH and Co 3 O 4 both have the sufficient potentials to drive CO 2 photoreduction, the constructed type-II heterojunction is more favorable for electron utilization efficiency. The optimal Co 3 O 4 /LDH heterojunction exhibited the highest CO evolution rate of 7.42 μmol•g −1 •h −1 and a CO selectivity of 90.5% with TEOA as sacrificial agent . The further characterizations highlight that the addition of Co 3 O 4 greatly improves the light absorption and the heterojunction effectively promotes the reverse migration of electrons and holes. This work investigates and verifies the designed type-II heterojunction based on MgAl–LDH, which has the guidance for the design of heterojunction catalysts and promotes the practical application of MgAl–LDH in photocatalytic region.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Liming Yang,Tao Yang,Enhui Wang,Xiangtao Yu,Kang Wang,Zhentao Du,Sheng Cao,Kuo-Chih Chou,Xinmei Hou
Aiming to design and prepare non-noble metal electrocatalysts for hydrogen production at high current density (HCD), NiCoP@FeNi LDH hierarchical nanosheets were deposited on nickel foam progressively using a hydrothermal-phosphorization-electrodeposition process. For hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), NiCoP@FeNi LDH/NF requires only 195 and 230 mV overpotentials to reach 1000 mA cm −2 , respectively. For overall water splitting, only 1.70 V is required at 1000 mA cm −2 . This is the largest value for non-noble metal-based electrocatalysts reported so far at HCD. The hierarchical structure exhibits good electron transport capability and the porous-macroporous structure enhances the gas release rate, resulting in enhanced hydrogen production at HCD. Especially, the synergistic effect of NiCoP and FeNi LDH contributes to the adsorption-desorption equilibrium of intermediate radicals during the reaction process and ultimately enhances the catalytic activity. This work provides useful direction for industrial-scale hydrogen production applications at HCD.
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高影响因子
APPLIED CLAY SCIENCE
·
2022
·
IF 5.907
Hao Sun,Chenzhe Xu,Xiaoting Yang,Lei Tao,Zheng Wang,Haitao Zhang,Xiang Ji,Juanjuan Ma,Lin Liu,Zhiwei Tong,Zhong Chen
By using MgAl layered double hydroxide (LDH) as the host material, a novel composite Pd@MgAl-LDH was prepared by assembling the precursor (PdCl 4 2− ) with the exfoliated LDH nanosheets followed by in-situ reduction. The heterogeneous catalyst was characterized by various characterization methods. The evenly distributed Pd NPs with an average particle size of about 3.27 nm were successfully supported on LDH nanosheets. The heterogeneous Pd@MgAl-LDH catalyst exhibited excellent catalytic efficiency for the Heck reaction of iodobenzene and methyl acrylate with the turnover frequency (TOF) value of 4180 h −1 under the optimum conditions. Furthermore, the catalyst offered easy preparation, and good stability toward the Heck coupling reaction and could be reused 5 times without obvious loss of catalytic activity .
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高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Zhuwu Jiang,Yuchang Wang,Hai Yu,Ning Yao,Jyunhong Shen,Yan Li,HongYu Zhang,Xue Bai
With the rapid development of drinking water disinfection technology , extensive attentions are paid to the nitrogenous disinfection by-products (N-DBPs) that has strong carcinogenicity , thus their degradation becomes important for the health of human beings. In this work, for the first time, CoFe-LDH material used as particle electrode is proposed to treat trace N-nitrosopyrrolidine (NPYR) in a three-dimensional aeration electrocatalysis reactor (3DAER). The factors on the degradation efficiency and energy consumption of NPYR are systematically investigated, and the results of radical quenching experiments show that the degradation of NPYR is completed by combining with ·OH, ·O 2 and direct oxidation together. CoFe-LDH particle electrode plays a vital role in generating ·OH via heterogeneous ‾Fenton-like reaction. Moreover, the adsorbed saturated CoFe-LDH particle electrode can be regenerated by electrochemical action to induce further recycle adsorption and form in-situ electrocatalysis. This work pave a way for the removal of NPYR with high efficiency, low energy conservation and environmental protection.
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Fang Chengqian,Liu Wanbing,Dai Yimin,Wang Zhiheng,Li Yaqi,Cai Ling,Liu Bo,Yang Siwen,Wang Junlong,Ding Xianglong,Zhang Yue-Fei,Li Yan,Wan Li
A novel magnetic hierarchically pillared Sep@Fe 3 O 4 /ZnAl-LDH composite was successfully synthesized via co-precipitation methods. The prepared Sep@Fe 3 O 4 /ZnAl-LDH composite were characterized via FTIR, XRD , XPS , SEM, TEM , BET and VSM . The results show that the Sep@Fe 3 O 4 /ZnAl-LDH composite have a hierarchical columnar structure with nanoscale structural unit (Fe 3 O 4 /ZnAl-LDH) and overall micron-scale morphology, and the obtained graded adsorbent has a large pore capacity and pore size distribution . The maximum adsorption capacities of the obtained samples for methyl orange ( MO) and Congo red ( CR) were 430 mg·g −1 and 832 mg·g −1 , respectively. Kinetic data of MO and CR adsorbed on as-prepared samples can well fit with pseudo-second-order model. The isothermal data of MO and CR adsorbed on Sep@Fe 3 O 4 /ZnAl-LDH match well with the Langmuir model. The thermodynamic results indicate that the adsorption process is spontaneous and endothermic. Besides, the adsorbent shows good stability and reproducibility in a reusable cycle. This study demonstrated that Sep@Fe 3 O 4 /ZnAl-LDH provides a new idea for the development of a novel hierarchical magnetic pillared adsorbent for the efficient removal of anionic dyes.
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高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Shijun Nie,Juan Wu,Lan Wang,Fan Cheng,Zhengguang Sun,Xiaobo Chen,Hai Liu,Sheng Wen,Chunli Gong
The trade-off between ionic conductivity and mechanical properties is the key issue facing anion exchange membranes (AEMs) at present. Herein, a new strategy combing three-dimensional (3D) hierarchical nanoarchitecture and magnetic field orientation was proposed to prepare imidazolium-functionalized poly(2,6-dimethyl phenylene oxide) (ImPPO)-based composite AEMs with simultaneously improved ionic conductivity and mechanical strength. Magnetic Fe 3 O 4 @LDH microspheres using Fe 3 O 4 as the core and two-dimensional lamellar anion conductor, layered double hydroxide (LDH), as the shell were prepared through a simple co-precipitation method. The as-prepared Fe 3 O 4 @LDH was then incorporated into ImPPO matrix and induced by an external magnetic field to fabricate Fe 3 O 4 @LDH-orientated composite AEMs. The hierarchical-structured Fe 3 O 4 @LDH can not only effectively avoid the stacking of LDH laminates and thus fully play the ion conduction ability of LDH, but also contribute to the formation of continuous OH − ion transport pathway in the composite system after magnetic field induction. The magnetic-field-oriented membrane with 1% Fe 3 O 4 @LDH doping exhibited ionic conductivity of 128.9 mS cm −1 at 80 °C, which was 43.1% higher than that of pure ImPPO. Moreover, the high dry strength (30.7 MPa) and satisfactory wet strength and flexibility of the composite membrane were also obtained. The assembled direct methanol fuel cell demonstrated a peak power density of 11.7 mW cm −2 , and showed an OCV retention of as high as 94.7% after continuous operation for 100 h, indicating their great potential for fuel cell applications.
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