FUEL
·
2023
·
IF 7.4
Muhammad Yousaf,Yuzheng Lu,Majid Niaz Akhtar,Ali Sarosh Khawaja,Khalid Mujasam Batoo,Sajjad Hussain,Asma Noor,Muhammad Akbar,Hu Enyi,M.A.K Yousaf Shah,Naveed Mushtaq,Bin Zhu
Lattice defects in rare earth (RE) doped single-phase semiconductor materials play a key role in structural modifications and physicochemical characteristics, resulting to enhance the ionic conductivity. In this work, we synthesized lanthanum doped samarium oxide with different mole ratios and applied it as a ceramics membrane fuel cell device to enable high peak power density (PPD) at low operational temperatures (520–400 °C). The samples are capable of triple charge H + /O 2− /e − conduction and enhance the catalytic function of the cell in terms of HOR and ORR kinetics by producing lattice defects. The fabricated Sm 1.5 La 1.5 Fe 5 O 12 (2-SLFO) fuel cell device exhibits a high OCV of 1.13 V with a maximum PPD of 864.26 mW/cm 2 at 520 °C. Durability measurement verifies that 2-SLFO-based fuel cell device can be worked for 60 h under fuel cell conditions (H 2 /air) at 520 °C. The first principle calculations using density functional theory (DFT) demonstrate that the higher oxygen vacancy concentration in the 2-SLFO sample may cause to the higher charge-transfer kinetics, subsequent in the enhancement of ions transportation of the fabricated fuel cell device.
研究领域:
材料科学
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电化学
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能源材料
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固态离子学
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燃料电池技术
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
·
IF 4.61
Jing Li,Ruoqi Wang,Zhen Su,Dandan Zhang,Heping Li,Youwei Yan
Nowadays, it is extremely urgent to search for efficient and effective catalysts for water purification due to the severe worldwide water-contamination crises. Here, 3D Fe@VO 2 core-shell mesh, a highly efficient catalyst toward removal of organic dyes with excellent recycling ability in the dark is designed and developed for the first time. This novel core-shell structure is actually 304 stainless steel mesh coated by VO 2 , fabricated by an electrophoretic deposition method. In such a core-shell structure, Fe as the core allows much easier separation from the water, endowing the catalyst with a flexible property for easy recycling, while VO 2 as the shell is highly efficient in degradation of organic dyes with the addition of H 2 O 2 . More intriguingly, the 3D Fe@VO 2 core-shell mesh exhibits favorable performance across a wide pH range. The 3D Fe@VO 2 core-shell mesh can decompose organic dyes both in a light-free condition and under visible irradiation. The possible catalytic oxidation mechanism of Fe@VO 2 /H 2 O 2 system is also proposed in this work. Considering its facile fabrication, remarkable catalytic efficiency across a wide pH range, and easy recycling characteristic, the 3D Fe@VO 2 core-shell mesh is a newly developed high-performance catalyst for addressing the universal water crises.
研究领域:
环境催化
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材料科学
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水处理
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纳米材料
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化学工程
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.9
Meijing Lu,Junling Meng,Jingxuan Cao,Xiaotong Wang,Xiaoxue Han,Siqi Li,Jian Ren,Na Xu
Nanoarchitectures in catalyst design have garnered significant attention due to their ability to enhance performance, durability, and resistance against undesirable side reactions. In this work, an in situ exsolution method was employed to decorate the electrode surface with nanoparticles, aiming to enhance the electrochemical performance and long-term stability of the solid oxide fuel cells (SOFCs) anode. Initially, the Pr 0.8 La 0.2 Fe x Ni 1- x O 3- δ (PLFN, x = 0.4, 0.5) powders were synthesized and subsequently processed by in situ hydrogen reduction. Following the exsolution, characterization by Rietveld refinement of X-ray diffraction (XRD) patterns and high-resolution transmission electron microscopy (HRTEM) confirmed the formation of Fe-Ni alloy and LaFeO 3 particles. Correlation with electrochemical measurements revealed that the enhanced anode performance is primarily due to the surface Fe-Ni alloy nanoparticles. Furthermore, X-ray photoelectron spectroscopy (XPS) analysis verified the metallic state of the exsolved Fe and Ni species after reduction. Finally, the PLFN material was applied as an anode in an electrolyte-supported single cell, and Pr 0.8 La 0.2 Fe 0.4 Ni 0.6 O 3- δ (PLF 0.4 N 0.6 ) demonstrated superior output performance under different reduction temperatures. Meanwhile, the peak power densities with PLF 0.4 N 0.6 anode after in situ exsolution reached 1.04, 0.64, and 0.56 W cm −2 at 850 °C when using H 2 , NH 3 , and CH 4 as fuels, respectively, exhibiting remarkable fuel flexibility. Moreover, the single cell with PLF 0.4 N 0.6 as the anode exhibited excellent operational stability, showing a performance degradation rate of only 0.01% per hour over a 100-hour test. These results offer valuable insights into the rational design of next-generation SOFCs anodes possessing exceptional activity and durability.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Chenchen Zhao,Mengjie Wu,Meiju Li,Tianqi Wang,Ping Zhang,Yujie Li
Excessive phosphate discharge into aquatic systems drives eutrophication while depleting finite phosphorus resources. To address this dual challenge, a magnetic calcium/ferric hydroxide composite was developed via co-precipitation for efficient phosphate recovery. The optimized magnetic calcium/ferric hydroxide composite (Ca:Fe = 3:1) integrates CaFe-layered double hydroxide and Ca(OH) 2 , achieving a phosphate uptake capacity of 224.2 mg/g. Pseudo-second-order kinetics confirmed the chemisorption mechanism, and the Freundlich isotherm revealed a multilayer adsorption behavior. Thermodynamic analysis confirmed the exothermic nature of the process. The composite performed robustly across pH 2 - 12, in the presence of competing anions, and in real water matrices. Mechanism studies identified pH-dependent pathways: electrostatic attraction and ligand exchange on amorphous akageneite under pH<6; hydroxyapatite precipitation and ligand exchange with ferrihydrite at pH≥6. LDH facilitated uptake via ion exchange and self-assembly under high phosphate concentrations (≥600 mg/L) and strongly alkaline conditions (pH≥12). The material maintained its magnetic properties, enabling easy separation and reuse over five cycles with >90% performance retention. This work presents a high-capacity, recyclable adsorbent that supports both eutrophication control and resource recovery, while offering mechanistic insights for designing multifunctional metal-based adsorbents.
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高影响因子
Journal of Energy Chemistry
·
2026
·
IF 14.9
Teng Zong,Xing Zhu,Ming Tian,Chaojie Wang,Nanxin Wang,Jiachen Yang,Shu Liu,Xiaodong Wang
It remains a grand challenge to inhibit coke formation for Fe-based oxygen carriers with extensive reduction due to the mismatch between the CH 4 decomposition rate on metallic Fe (Fe 0 ) and the rate of the lattice oxygen migration to the surface for carbon oxidation, which led to unsatisfactory syngas selectivity and productivity for chemical looping partial oxidation of methane (CLPOM). Herein, Cu-modified Fe-based garnets (Y 3 Fe 3 Cu x Al 2− x O 12 abbreviated as Fe 3 Cu x Al 2− x , x equals 0, 0.01, and 0.05) were designed, which exhibited boosted carbon-resistance with both CH 4 conversion and CO selectivity of 94% and extraordinary syngas productivity of almost 8 mmol g −1 for Fe 3 Cu 0.05 Al 1.95 , surpassing most of the state-of-the-art Fe-based oxygen carriers in CLPOM. This could be attributed to the in-situ formation of a CuFe alloy under reaction conditions, which remarkably decreased the activity of CH 4 decomposition over Fe 0 sites to generate carbon and thus allowed lattice oxygen migration to the surface timely for the oxidation of coke formed.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Jia Zhao,Heng Zhang,Mengfan Luo,Hongyu Zhou,Zehua Wang,Jialong Yin,Chuanshu He,Peng Zhou,Jing Zhang,Bo Lai
Ferrate (Fe(VI)) activation by Mn(II) has been proven as a powerful technology due to the high catalytic activity of Mn(II) and the generation of multiple intermediates. However, the reactivity and stability of these intermediates greatly differ, thus necessitating the precise regulation of redox pathways towards the generation of the most desirable intermediates. In this study, we utilized ligand engineering to finely tune the redox pathways between Fe(VI) and Mn(II). Mn(II) complexing with ethylenediaminetetraacetic acid (EDTA) and nitrotriacetic acid (NTA) switched the redox pathways from generating Mn(IV) to more robust intermediates and enhanced the decontamination ability of Fe(VI). Ligand-to-metal charge transfer promoted the electron migration from Mn(II) complexes to Fe(VI), generating Fe(V) and Mn(III) intermediates. Then, complexing regulated the transformation of Mn(III) to generate different reactive species. Specifically, Mn(II)-EDTA activated Fe(VI) through Fe(IV)/Fe(V) and Mn(V), whereas the Fe(VI)-Mn(II)-NTA system relied on Mn(VII). Owing to the weaker chelating effect of NTA, unstable Mn(III)-NTA was successively oxidized via Mn(V) to Mn(VII). In contrast, the stronger stability of EDTA suppressed the excessive oxidation of Mn(V)-EDTA, boosting pollutant interception of reactive species. Accordingly, the Fe(VI)-Mn(II)-EDTA process delivered stronger activation and wider applicability, diminishing contaminant toxicity and resisting background interference. This study provides valuable insights into Fe(VI) activation induced by transition metal complexes and serves as a reference for selecting efficient strategies to avoid excessive consumption of oxidative capacity.
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TURKISH JOURNAL OF CHEMISTRY
·
2024
·Vol. 47
·期 6
·1307-1319
·
IF 1.3
WANG YUN-DONG,CHEN YI-JUN,CHENG MEI-NA,LIU XIN
In this paper, a novel Fenton reaction system which was called MHACF-MIL-100(Fe) was constructed. In this system, based on active hydrogen-accelerated FeIII reduction, the hydroxyl radical was continuously produced with a trace amount of total iron. The MIL-100(Fe) modified with the nano-Pd0 particle could be used to activate the H2. Under normal temperature and pressure, the target organic pollutants, such as sulfamethazine and 4-chloro phenol, could be degraded fast. In the condition of initial aqueous solution pH 3, 2 g L–1 dosage of MIL-100(Fe) catalyst loaded with nano-Pd0, Pd/MIL-100(Fe), 20 mM 30 wt% hydrogen peroxide, 25 μM ferrous chloride and 60 mL H2 min–1, 97.8% of sulfamethazine and 100% 4-chloro phenol could be degraded within only 5 min, respectively. Although the surface of the catalyst exhibited more obvious defects and roughness after 5 consecutive destructive experiment cycles, its basic structure could be maintained. The removal efficiency could be maintained at least more than 79% (sulfamethazine) and 94% (4-chloro phenol). That may be mainly attributed to the degradation of hydroxyl radical.
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Journal of Water Process Engineering
·
2026
·
IF 6.7
Sufang Zhao,Xuezhe Wen,Renju Liu,Bin Zhi,Xingyi Ma,Zongze Shao
Coagulation has proven effective in removing microplastics (MPs) from water, yet existing studies indicate that using coagulants alone often yields unsatisfactory results. Therefore, developing sustainable flocculation technologies is crucial for efficient microplastic removal. In this study, microbial flocculants originated from algal extracellular organic matter (EOM) were used to enhance the effectiveness of the traditional flocculant ferric chloride (FeCl 3 ) for MP removal in marinr water. The PS flocculation efficiency of Fe (III)–EOM treatment achieved 90 %, which is 5 to 10 times higher than that of FeCl 3 treatment. Zeta potential, scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) analyses revealed that EOM significantly enhanced flocculation by facilitating charge neutralization and agglomeration adsorption. Additionally, reductions in total organic carbon (TOC), protein, total sugars and Fe concentration after flocculation in the Fe (III)–EOM system confirmed effective binding and co–precipitation of organic compounds in EOM with Fe (III). At 1 mmol/L Fe (III), the removal efficiency of TOC, total sugars, and proteins in the K1–EOM/S1–EOM systems reached 39 %/21 %, 47 %/40 %, and 10 %/18.7, respectively. Notably, the Fe (III)–EOM system significantly reduced residual iron levels to below 1 mg/L, which is significantly lower than that using FeCl 3 alone (29.1 mg/L). Therefore, the Fe (III)–EOM flocculation system demonstrates a high flocculation efficiency with low iron residue, providing a promising and sustainable solution for MP removal in water treatment.
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高影响因子
FUEL
·
2026
·
IF 7.8
Jiaqi Yu,Yuxin Wen,Shuo Wang,Rui Zhang,He Yang,Yang Li,Xingxing Xiao,Yining Guan,Haoquan Hu,Lijun Jin
Alleviating the harsh liquefaction conditions still remains huge challenge in the process of direct coal liquefaction. To investigate the feasibility of mild coal liquefaction and develop strategies for alleviating reaction conditions, this study adopted a typical low-rank oil-rich coal from Xinjiang as the feedstock, and the effects of initial H 2 pressure, solvent types (9,10-dihydroanthracene (DHA), tetralin (THN), pyrene/tetralin (Py/THN)), catalyst sulfidation method ( in-situ and ex-situ ), and H 2 S atmosphere on liquefaction performances were evaluated under lower H 2 pressure over the Fe-based catalysts. Results show that, at lower initial H 2 pressure (≤5 MPa), the decrease in pressure leads to the decline of coal conversion and oil yield, along with the increase in the yields of asphaltene and preasphaltene. Coal conversion and oil yield under different solvents increased in the order of DHA < Py/THN < THN, indicating that the solvent with good H-donating ability but no H-consumption for itself is vital to improve oil yield. Besides, whether Fe 2 O 3 or FeOOH is used as the iron precursor, in-situ sulfidation of the catalyst contributed to higher oil yield than pre-sulfidation. It is analyzed that the iron precursor undergoes the sulfidation reactions and the produced H 2 S and Fe 1−x S during the process promote H-transfer, thereby improving coal conversion and oil yield. Introducing H 2 S into H 2 atmosphere can remarkably increase coal conversion and oil yield. The oil yield is up to 69.89 wt% under 5%H 2 S/H 2 atmosphere and initial pressure of 5 MPa, close to that under 7 MPa and pure H 2 atmosphere, which is attributed to lower bond energy of the S-H bond. Both the hydrogen free radicals and mercapto free radicals (•HS) generated after the cleavage of H 2 S can stabilize free radicals produced from coal cracking and suppress the polycondensation reaction of the free radicals under low H 2 pressure, thereby increasing oil yield.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xuejian Zhang,Yongjie Wang,Shuanghong Zhao,Shuai Zhang,Xinhua Gao,Kangzhou Wang,Subing Fan,Qingxiang Ma,Tian-Sheng Zhao,Jianli Zhang
Although Fe-based Fischer-Tropsch synthesis catalysts exhibit advantages in linear α-olefins (LAOs) synthesis, how to promote C C coupling and inhibit the secondary hydrogenation of olefins remains a challenge. Herein, we report an N-doped carbon supported Fe-based catalyst fabricated via a self-templated combustion activation strategy and impregnation method, which enables the highly selective conversion of syngas to LAOs. Systematic characterizations revealed that sodium citrate-assisted activation optimized the pore structure of the supports, facilitated the transformation of N configurations and enhanced the relative content of pyrrolic N. Pyrrolic N regulated the surface electron density of the active sites, which enhanced the adsorption and activation of CO and facilitated the C C coupling reactions, leading to an increase in C 5 + selectivity from 25.64% to 40.71%. Meanwhile, the electronic effect of pyrrolic N effectively weakened the interaction between olefins and active sites, thereby suppressing the secondary hydrogenation of olefins. The Fe/CN(Act.)-550 catalyst exhibited LAOs selectivity increasing from 29.89% over Fe/CN550 catalyst to 70.15%. The catalyst outperforms most previously reported results and maintains stability during 120 h long-term operation without significant sintering or coking. This work provides new insights for the design of catalysts for the highly efficient conversion of syngas to LAOs.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Yue Zhao,Yingshi Zhu,Kangting Li,Yanfei Wei,Yuru Li,Tao Yu,Jianqiu Zhu,Xingwang Zhang
During the electro-Fenton (EF) process, the in-situ activation of H 2 O 2 at the cathode is an important strategy to minimize the ineffective consumption of H 2 O 2 and enhance the reaction efficiency. Accordingly, a structurally ordered FeNi-layered double hydroxide (FeNi-LDH) nanosheet array was in-situ grown on carbon felt (CF) by a simple hydrothermal method. A Fe 2+ -based aliovalent substitution strategy was employed to modulate the morphology and active sites of FeNi-LDH. On one hand, Fe 2+ facilitated the formation of abundant open reactive microspaces by regulating the nucleation rate, which was conducive to the exposure of active sites and the mass transfer process. On the other hand, the aliovalent substitution of Fe 2+ introduced more low-valent metal sites and surface defects (–OH), thereby activating the in-plane metal sites of FeNi-LDH. As a result, the bifunctional Fe(II)-FeNi-LDH/CF-0.5 cathode exhibited an excellent performance. At a low current density of 5 mA cm −2 and with NFX concentrations up to 40 mg L −1 , the EF system removed 92.59% of NFX within 15 min, with a pseudo-first-order kinetic constant of 11.67 × 10 −2 min −1 . As the dominant reactive species, hydroxyl radicals (•OH) originated from the combined contributions of both homogeneous and heterogeneous catalytic pathways. The density functional theory (DFT) calculations further revealed that the abundant surface hydroxyl groups were conducive to the adsorption and activation of H 2 O 2 . This work provides a novel material option for EF systems.
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高影响因子
Catalysts
·
2026
·Vol. 16
·期 3
·
IF 4.5
Yao He,Jie Zhang,Renhua Huang,Nanxin Li,Yunwu Zheng
CO2-assisted catalytic pyrolysis presents a viable and promising approach to addressing plastic waste pollution and mitigating climate change. However, the effects of the metal–catalyst combination mode and the spatial distance between metal–acid sites on catalytic performance remain unclear. In this study, the reaction behaviors of the configurations, Fe3O4and ZSM-5 in tandem catalysis (Fe3O4&HZ), their physical mixture (Fe3O4-HZ), and Fe-loaded ZSM-5 (Fe/HZ), were compared in polypropylene pyrolysis under a CO2atmosphere. The aromatic contents followed this order: Fe/HZ > Fe3O4-HZ > Fe3O4&HZ > ZSM-5 > Fe3O4. Specifically, Fe/HZ with the highest degree of metal–zeolite proximity achieved an aromatic content of 66.1%, significantly higher than the 34.2% obtained with Fe3O4&HZ, demonstrating that closer metal–acid proximity promoted aromatic formation. Moreover, Fe/HZ significantly reduced coke deposition. Based on characterization results from XRD, SEM, TEM, XPS, and NH3-TPD, the enhanced spatial proximity between metal and acid sites strengthened the functional synergy between iron-based redox sites and zeolitic Brønsted acid sites. This synergy facilitated the reverse water–gas shift reaction of CO2, which consumed hydrogen generated during aromatization and shifted the reaction equilibrium toward enhanced aromatic production. These findings would offer theoretical and strategic insights into the optimization of CO2-assisted catalytic pyrolysis systems for the sustainable upcycling of plastic waste.
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