APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Zhiheng Pang,Fang Cui,Qinghai Ma,Tieyu Cui
As an alternative to noble metal oxygen evolution reaction (OER) catalysts, iron-based materials face limitations in their practical applications due to their relatively low activity and conductivity, despite their cost-effectiveness. In this study, we developed a Ce-doped amorphous FeOOH catalyst (Ce-FeOOH) using an electron modulation strategy, leveraging the strong electron-absorbing capability of Ce 4+ ions to regulate the electronic structure of the FeOOH active site. Experimental results and characterizations demonstrated that Ce 4+ extract electrons from the iron sites via the Ce(IV)-O-Fe electronic bridges, generating highly active iron species with elevated oxidation states, thereby effectively enhancing the OER catalytic performance. The optimized Ce-FeOOH-3:2 exhibited outstanding OER performance in 1.0 M KOH, achieving a low overpotential of 248 mV at a current density of 10 mA cm −2 , a Tafel slope of 44 mV dec −1 . Moreover, the material exhibits stable continuous electrolysis performance for 100 h at overpotentials of 250 mV and 384 mV, respectively. This work provides a novel approach to synergistically modulating the electronic state of iron-based catalysts through high-valent metal doping and structural amorphization, offering valuable insights of the design and development of highly efficient and stable non-precious metal OER catalysts.
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ACS Sensors
·
2024
·
IF 8.2
Fan Shi,Zejun Zhang,Behisht Ara,Zhitan Huang,Qifeng Gui,Ahmad Mansoor,Wei Sun
Fe single-atom and Fe cluster-coupled N, S co-doped carbon nanomaterials (FeSA–FeONC-NSC) were prepared through a two-step high-temperature pyrolysis process using Gelidium corneum enriched with C, Fe, O, N, and S as precursors. The analysis by aberration-corrected scanning transmission electron microscopy and X-ray absorption spectroscopy revealed the presence of single-atom Fe in Fe–N4 coordination structures, along with small clusters as Fe–O-coordinated Fe2O3. Single-atom Fe in the form of Fe2+/Fe3+ provides more electrocatalytic active sites, which synergistically accelerates the charge migration process in the assembly of FeSA–FeONC-NSC with Fe2O3 clusters. The flexible nonenzymatic sensor, based on FeSA–FeONC-NSC and fabricated using a polydimethylsiloxane substrate, exhibited excellent catalytic activity for both uric acid (UA) and tyrosine (Tyr). Low detection limits for UA (0.14 μmol L–1) and Tyr (0.03 μmol L–1) were observed by using chronoamperometry in artificial sweat. The in situ detection of sweat was performed in combination with an integrated circuit board affixed to human skin, and the results were generally consistent with those of the high-performance liquid chromatography method. Therefore, FeSA–FeONC-NSC serves as a good modifier for wearable electrochemical sweat sensor applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Rong Li,Yiziqi Lu,Meiqian Lu,Yue Liu,Guodong Zhang,Qiuling Ma,Jian Zhou,Tiecheng Wang
Iodinated X-ray contrast media, as a frequently used medical diagnosis in the imaging of internal organs, soft tissues, and blood vessels, are widely encountered in water environments because of their non-metabolic ability. Herein, a series of co-precipitates (DBC-FeO x ) of dissolved black carbon (DBC) and FeO x were successfully synthesized. The chelation of Fe species with COO – groups in DBC enhanced the excellent electron transfer capability and persulfate (PS) activation performance of the resulting DBC-FeO x , thus boosting iopamidol (IPM) degradation. The IPM removal rate constant in the DBC-FeO x /PS was 35 times and 4.6 times higher than those observed in the DBC/PS and FeO x /PS systems, respectively. There existed an appropriate C/Fe molar ratio in the DBC-FeO x co-precipitates for PS activation, and the IPM degradation was driven by both radical and non-radical pathways. Fe sites were the primary active sites in DBC-FeO x for PS activation, and C=O groups played an important role in accelerating the Fe(III)/Fe(II) cycle by promoting rapid electron transfer, thereby enhancing radical oxidation pathways. Concurrently, DBC-FeO x acted as an electron shuttle to promote the electron transfer from IPM to PS, creating non-radical pathways for IPM removal. IPM degradation processes involved amide hydrolysis oxidation, hydrogen extraction, and deiodination. The typical iodine species HOI was also converted to non-toxic IO 3 - after IPM decomposition, thus reducing potential risks.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Sadegh Ghorbanzadeh,Zeinab Sanaee,Somayeh Mohammadi
Solid-solution MXenes have emerged as a transformative class of 2D materials, offering unprecedented control over electronic structure and redox activity through M-site compositional tuning. However, their broader development remains constrained by the extreme synthesis temperatures (>1400°C) and complex stoichiometric mixing protocols required for conventional solid-state MAX phase synthesis, which result in secondary phase formation, elemental inhomogeneity, and limited scalability. This study addresses these challenges by introducing a low-temperature, pre-alloyed precursor strategy, the first successful synthesis of a quaternary (Ti,V,Fe) 2 AlC solid-solution MAX phase via molten salt-assisted synthesis at a substantially reduced temperature of 950°C, employing commercial Ti-6Al-4V alloy as the precursor to guarantee atomic-scale transition metal distribution. The resulting MAX phase was subsequently converted into (Ti,V,Fe) 2 C MXene via in-situ hydrofluoric acid (HF) etching using three fluoride salts (LiF, NaF, and NH 4 F), demonstrating that etchant chemistry is a powerful parameter for engineering MXene morphology and electrochemical behavior. A key finding of this work is the direct morphology controllability imparted by fluoride salt selection. LiF-assisted etching produces open, loosely aligned lamellae with expanded interlayer spacing (d ≈ 9.55 Å) and the highest specific capacitance of 126.9 F/g at 5 mV/s; NaF-assisted etching yields compact, well-ordered onion-like aggregates (d ≈ 9.45 Å) with superior interfacial charge-transfer kinetics (R ct = 1.58 Ω); and NH 4 F-assisted etching results in aggressively degraded, defect-rich morphology with significantly reduced performance (65.8 F/g). These results establish an energy-efficient, industrially scalable pathway for the production of morphology-engineered, multi-elemental MXene electrodes and provide a robust mechanistic framework linking etchant hydration chemistry to structural architecture and electrochemical function.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2015
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IF 2.587
Meng Chen,Jiaqi Yan,Ying Tan,Yongfei Li,Zhimin Wu,Langsheng Pan,Yuejin Liu
Hydroxyalkylation of phenol with formaldehyde to bisphenol F was investigated over the metal–organic frameworks of MIL-100(Fe or Cr) and MIL-101(Fe or Cr) encapsulated with Keggin phosphotungstic acid (PTA). PTA@MIL-100(Fe or Cr)(β) and PTA@MIL-101(Fe or Cr)(β) with different β values (the molar ratio of W/M, where M = Fe or Cr) were prepared and characterized by XRD, BET, FT-IR, TG, SEM, TEM, and ICP. The research results showed that PTA@MIL-100(Fe or Cr)(β) had a higher catalytic activity than PTA@MIL-101(Fe or Cr)(β). PTA@MIL-100(Fe)(0.4) was the most effective among the studied catalysts and had excellent reusability. A 92.12% product yield and 93.01% selectivity for bisphenol F could be obtained over the PTA@MIL-100(Fe)(0.40) catalyst. The effects of the reaction time, reaction temperature, catalyst concentration, and phenol/formaldehyde molar ratio on the reaction performance were also investigated. A plausible mechanism for hydroxyalkylation of phenol with formaldehyde to bisphenol F was proposed.
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ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yinling Wang,Juan Wang,Dandan Wei,Maoguo Li
M–N–C electrocatalysts for the oxygen reduction reaction (ORR) have been considered as the most promising alternatives to precious metal catalysts. However, the catalytic activity of M–N–C especially in an acidic medium is still unable to meet the practical requirement, and the corresponding ORR mechanism also remains unclear. Herein, an “MOF-protective-pyrolysis” strategy was adopted to synthesize an Fe–N–C catalyst (P-FeMOF@ZIF-8) with Fe–N4 as the predominant Fe species. The P-FeMOF@ZIF-8 displays high catalytic activity in both acidic and alkaline mediums. The experimental results further reveal the different importance of the Fe species in different mediums. Based on the results, a distinct mechanism of the ORR the in acidic medium was proposed, where the synergistic effect of the Fe–N4 site and carbon in improving the kinetics of the ORR were well explained. The findings and the corresponding perspective may provide a new guidance for the design of highly efficient ORR electrocatalysts.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
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IF 9.4
Danlian Huang,Hai Huang,Guangfu Wang,Ruijin Li,Ruihao Xiao,Li Du,Wei Zhou,Wenbo Xu
The coexistence of antibiotic resistance genes (ARGs) and antibiotic-resistant bacteria (ARB) in the environment poses a potential threat to public health. In our study, we have developed a novel advanced oxidation process for simultaneously removing ARGs and ARB by two types of iron and nitrogen-doped biochar derived from rice straw (FeN-RBC) and sludge (FeN-SBC). All viable ARB (approximately 10 8 CFU mL −1 ) was inactivated in the FeN-RBC/ peroxymonosulfate (PMS) system within 40 min and did not regrow after 48 h even in real water samples. Flow cytometry identified 96.7 % of dead cells in the FeN-RBC/PMS system, which verified the complete inactivation of ARB. Thorough disinfection of ARB was associated with the disruption of cell membranes and intracellular enzymes related to the antioxidant system. Whereas live bacteria (approximately 200 CFU mL −1 ) remained after FeN-SBC/PMS treatment. Intracellular and extracellular ARGs ( tetA and tetB) were efficiently degraded in the FeN-RBC/PMS system. The production of active species, primarily •OH, SO 4 •- and Fe (IV), as well as electron transfer, were essential to the effective disinfection of FeN-RBC/PMS. In comparison with FeN-SBC, the better catalytic performance of FeN-RBC was mainly ascribed to its higher amount of pyridine-N and Fe 0 , and more reactive active sites (such as C O group and Fe-N sites). Density functional theory calculations indicated the greater adsorption energy and Bader charge, more stable Fe-O bond, more easily broken O O bond in FeN-RBC/PMS, which demonstrated the stronger electron transfer capacity between FeN-RBC and PMS. To encapsulate, our study provided an efficient and dependable method for the simultaneous elimination of ARGs and ARB in water.
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Run Yuan,Yu Xia,Xu Wu,Can He,Yihe Qin,Changjun He,Xuewei Zhang,Na Li,Xuwen He
Catalytic oxidation is widely used in the treatment of refractory wastewater. However, catalytic oxidation has some problems such as high cost and limited production of radicals. To improve these, in this study, a new process of O 3 /H 2 O 2 /Fe-shavings which coupled catalytic ozonation and Fenton-like oxidation with Fe-shaving wastes reused, was used in the treatment of coking wastewater secondary biochemical effluent (CWSBE). The effects of the environmental conditions on the degradation of CWSBE were studied and the response surface method was used to optimise the parameters. The performances in organic pollutant removal from CWSBE were systematically analysed by a couple of methods such as gas chromatography mass spectrometry and three-dimensional fluorescence. The results showed that macromolecular organics were degraded into small molecules pollutants after treatment by the O 3 /H 2 O 2 /Fe-shavings process. At an ozone concentration of 27.5 mg/L, with the hydrogen peroxide concentration being 10.7 mmol/L, the reaction time 60 min, the initial pH value 3.6, and the pump speed 150 rpm, the COD removal degradation efficiency was 77.5%, and the effluent COD met relevant wastewater discharge standards in China (GB 16171-2012). The mechanism research showed that·OH plays an important role in the degradation of organic pollutants.
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Molecular Catalysis
·
2026
·
IF 4.3
Minghao Geng,Jiahao Li,Zhengze Li,Meng Sui,Fashe Li,Hua Wang,Zhiyu Hua
Fe-modulated Cu-ZnO CeO 2 catalysts were synthesized via sol-gel method. • Moderate Fe doping suppressed CuO growth and improved Cu dispersion. • Fe tuned the interface and oxygen defects to balance reducibility. • Fe10-CZCe achieved 14.5% CO 2 conversion with high methanol selectivity. • The promotion by Fe stems from interfacial regulation, not new phases. Copper-based catalysts have been widely applied in methanol synthesis from CO 2 hydrogenation. Yet efficient operation at an industrially relevant level remains challenging. The use of CO 2 as a carbon source is still limited by difficult molecular activation and by imperfect interfacial matching. Here, a series of Fe-doped Cu-ZnO CeO 2 catalysts was prepared by a sol-gel route. The influence of Fe content on phase structure, surface electronic environment, reduction behaviour, CO 2 adsorption characteristics and catalytic performance was examined systematically. Fe incorporation did not change the fundamental phase composition of CuO and CeO 2 . It did, however, strongly affect Cu dispersion, the near-surface defect environment of CeO 2 , and the electronic structure of the interface. Moderate Fe addition suppressed CuO crystallite growth, improved Cu dispersion, and produced a more concentrated reduction profile with a more suitable distribution of CO 2 adsorption strength. Excess Fe enhanced defect-related signals and high-temperature adsorption, but also increased interfacial perturbation, which was unfavourable for the further conversion of intermediates. At 3 MPa and 260 °C, Fe10-CZCe showed the best overall performance, giving a CO 2 conversion of 14.5% together with high methanol selectivity and the highest methanol space-time yield. The beneficial role of Fe is therefore linked to reconstruction of the Cu-ZnO CeO 2 interface, which promotes a more effective balance between CO 2 adsorption, activation and hydrogenation. These findings provide a useful perspective for compositional tuning and interface design in Cu-based catalysts. Download: Download high-res image (231KB) Download: Download full-size image
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Jialu Li,Junhao Lin,Zhongyue Sun,Jiawei Liu,Zhilin Zhang,Huiping Deng
A visible-light-assisted peroxymonosulfate (PMS) activation system based on Fe-doped CeO 2 was developed for the efficient degradation of ofloxacin (OFX) in aqueous environments. Fe incorporation effectively regulated the electronic structure of CeO 2 , leading to enhanced visible-light utilization, promoted charge separation, and accelerated interfacial electron transfer, thereby facilitating PMS activation. The optimized 10% Fe-CeO 2 catalyst exhibited remarkably enhanced catalytic activity, achieving nearly complete OFX degradation within 10 min with an apparent rate constant of 0.3606 min −1 , which was substantially higher than that of pristine CeO 2 and the corresponding control systems. Comprehensive characterizations revealed that Fe incorporation optimized the local electronic environment of CeO 2 , thereby facilitating charge migration and PMS activation. Reactive species quenching experiments combined with electron paramagnetic resonance analyses confirmed that multiple reactive oxygen species, including superoxide radicals (O 2 •- ), sulfate radical (SO 4 •- ), hydroxyl radical ( • OH), and singlet oxygen ( 1 O 2 ), participated synergistically in the degradation process. Density functional theory calculations further revealed that Fe incorporation optimized the electronic distribution of CeO 2 and strengthened the adsorption and electron transfer of PMS and O 2 on the catalyst surface, thereby promoting the generation of oxidative species. This work provides mechanistic insight into Fe-mediated electronic structure modulation for efficient PMS activation and offers a feasible strategy for the rational design of ceria-based photocatalysts for environmental remediation.
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Surfaces and Interfaces
·
2026
·
IF 6
Qiubai Jiang,Tianle Tan,Hui Deng,Jiang Wan,Long Wang,Min Li,Yang Wang,Guangxu Liu
Solar-driven interfacial evaporation (SDIE) is a low-energy and environmentally friendly technology for clean-water production. However, when applied to complex waters, volatile organic compounds (VOCs) can readily enter the condensate. In this study, a sequential strategy involving carbonization followed by composite fabrication was used to construct a CuO@Fe 2 O 3 @CC-SA (CFCC-SA) bimetallic oxide aerogel evaporator with both mechanical stability and flexibility for efficient water evaporation and VOC degradation. Synergistic interactions between Fe and Cu enhanced both the photothermal conversion efficiency and Fenton-like catalytic activity of the material. Meanwhile, the porous aerogel network provided excellent hydrophilicity and rapid water transport, thereby promoting efficient evaporation. Under 1.0 kW m –2 irradiation, the CFCC-SA evaporator exhibited an evaporation rate of 2.06 kg·m –2 ·h –1 , corresponding to an approximately 20% increase relative to the monometallic CuO@CC-SA evaporator. For phenol, CFCC-SA achieved removal efficiencies of 98.4% in the condensate and 63.8% in the raffinate. Furthermore, CFCC-SA maintained high phenol removal performance over a broad pH range and under highly saline conditions (20 wt% NaCl). Overall, by integrating efficient water transport with synergistic bimetallic catalysis, the CFCC-SA evaporator offers a promising strategy for designing SDIE systems that simultaneously enable high-rate water evaporation and VOC removal. Download: Download high-res image (272KB) Download: Download full-size image
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 16
·118645
·
IF 6.3
Yuzhe Xie,Jie Zhang,Yuting Liu,Xing Luo,Zixiang Pei,Baohua Cao,Konrad Świerczek,Yang Zhang,Wanbing Guan
To mitigate interconnect corrosion in seawater-fed solid oxide electrolysis cells (SOECs), Mn 1.5 Co 1.5 O 4 spinel coatings were deposited on Fe-22Cr stainless steel. At 750 °C, the coated interconnects exhibited an area-specific resistance (ASR) of 31.8 mΩ cm 2 after 4835 h of oxidation in air, with a parabolic rate constant of 3.0 × 10 −5 mg 2 cm −4 h −1 . Following exposure to seawater vapor for 500 h, the ASR reached 3.36 mΩ cm 2 , with a predicted value of 9.80 mΩ cm 2 at 5000 h. These findings underscore the coating’s improved oxidation resistance under dual-atmosphere conditions. Furthermore, a three-cells stack demonstrated high stability with a low degradation rate of 1.04 × 10 −5 h −1 at 100 mA cm −2 for 100 h. Post-test analysis confirmed a crack-free structure with negligible additional resistance, indicating that the spinel coating satisfies the engineering requirements for durable, direct seawater electrolysis and provides a scalable pathway for green hydrogen production.
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