JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Jiaxin Huang,Huanbin Gou,Jinming Pan,Yuping Liu,Ming Nie,Bo Shang,Danmei Yu,Guangsheng Huang,Dingfei Zhang,Fusheng Pan
Within the domain of metal-air battery systems, developing the non - precious metal catalysts featuring extraordinary catalytic activity in oxygen reduction reaction (ORR) is crucial to the air-cathode. This work unveils a sol-gel engineered synthesis of La 0.9 Ce 0.1 Co 0.1 Mn 0.9 O 3 perovskite via the co-doping strategy, with targeted exploration of its electrochemical behavior and underlying mechanism in Zn-air and Mg-air battery systems. The perovskite La 0.9 Ce 0.1 Co 0.1 Mn 0.9 O 3 has a wealth of catalytically active ORR sites and a mesoporous architecture. The diffusion-limited current density of La 0.9 Ce 0.1 Co 0.1 Mn 0.9 O 3 successfully achieves a 1.2-fold enhancement relative to commercial Pt/C with a low H 2 O 2 yield of <0.27 %, underscoring its superior mass transport kinetics. The maximum power densities of La 0.9 Ce 0.1 Co 0.1 Mn 0.9 O 3 -based primary/secondary zinc - air batteries are 130 and 83 mW cm −2 , respectively, which are on a par with those of Pt/C - based Zinc - air batteries. Whereas, the open - circuit voltage and maximum power density of the primary magnesium - air battery fabricated with 10 wt% KCl as the electrolyte are 1.85 V and 52 mW cm −2 , respectively, which exhibit superiority over Pt/C catalysts. In combination with DFT analyses, the La 0.9 Ce 0.1 Co 0.1 Mn 0.9 O 3 perovskite emerges as a prospective ORR catalyst for metal-air battery realization.
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CERAMICS INTERNATIONAL
·
2025
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IF 5.6
Yumin An,Mingyao Song,Jiabao Xu,Yongshuai Xie
In this paper, Ce-Zr oxide ceramic fiber aerogels (CZOf) with effective thermal insulation properties were successfully prepared by a simple two-step method of solution blow spinning and pyrolysis. In the spinnable precursor cerium-zirconium carboxylate, the organic carboxylic acid ligands and metal inorganic salts enhanced its structural stability through coordination interactions. The effect of thermal treatment temperature and Ce doping amounts on the crystal structure of CZOf were analyzed based on XRD. At the same time, the microstructures of the CZOf heat treated at different temperatures were analyzed by SEM in detail. In addition, CZOf exhibited a compressive stress of 24.9 kPa under 80 % compressive strain, and still showed a compressive stress of 20.2 kPa after 20 compression cycles. The room-temperature thermal conductivity of CZOf was in the range of 31.4–38.3 mW m −1 K −1 . The CZOf with a thickness of 10 mm could reduce the hot surface temperature from 1200 °C to about 210.5 °C after 10min, demonstrating excellent thermal insulation performance.
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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2025
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IF 6.1
Fangjing Xiao,Guibin Jiang,Duo Bu,Jianjie Fu,Xiaomei Cui,Qiangying Zhang
A porous aluminum–cerium (Al/Ce) composite oxide was innovatively synthesized via a one-step, template-free evaporation–pyrolysis route, enabling in-situ formation of sulfate-templated mesopores and dual-functional –OH/SO 4 2 ⁻ sites. Designed to address the severe ion interference of geothermal water, this bifunctional adsorbent achieved rapid, simultaneous removal of arsenic (As) and fluoride (F⁻) with high efficiencies (93.8 % As, 91.5 % F⁻) within 15 min. Maximum adsorption capacities reached 251 mg/g (As) and 297 mg/g (F⁻), following pseudo-second-order kinetics and Freundlich isotherms. Thermodynamic analysis confirmed spontaneous, endothermic chemisorption. Structural characterizations (FT-IR, XRD, XPS) revealed ion exchange and surface complexation mechanisms via formation of Al–F, Ce–F, and Ce–O–As bonds. Remarkably, in real geothermal matrices rich in competing ions, removal efficiencies exceeded 96 %, underscoring the composite's strong anti-interference performance. This study demonstrates a scalable, environmentally friendly strategy for fabricating robust, synergistic adsorbents tailored for complex wastewater treatment.
研究领域:
环境科学
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材料化学
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水处理
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吸附技术
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无机化学
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Molecular Catalysis
·
2022
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IF 5.089
Yi Yang,Jia Fang,Zhongwei Meng,Ping Pu,Qian Zhang,Chengcheng Yi,Suozhu Pan,Yalong Li
To solve the soot elimination and optimize catalyst diesel particulate filter (CDPF) regeneration strategies, a series of Mn-Ce catalysts with different Mn/(Mn+Ce) molar ratios are successfully synthetized by hydrothermal method and the complete catalytic oxidation of diesel engine soot are investigated. Compare to CeO 2 and MnO 2 , the catalytic promotion on soot combustion of Mn-Ce catalysts is more excellent by thermogravimetric experiments due to their better ability to activate oxygen species, which is consistent with results in characterization analysis. Among as-prepared catalysts, MC-0.40 has the best catalytic activity with the lowest starting temperature ( T s ), peak temperature ( T p ) and largest comprehensive combustion index ( S ) both in O 2 /N 2 and NO/O 2 /N 2 atmosphere. Influence factors on catalytic performance are studied. Weight ratios of soot/MC-0.40 catalyst are suitable at the range of 1:9–1:13, which makes soot combustion more easily. Ashes in the reaction process show adverse effects due to their ability to increase ignition point by inhibit heat and oxygen transfer. Mn-Ce catalysts are more sensitive and show better catalytic activity in NO atmosphere because of generations of abundant adsorbed species and NO adsorption/desorption. The three consecutive cycles of MC-0.40 catalyst are performed to study the catalytic stability, and thermogravimetric curves show that the potential reusability of MC-0.40 catalyst can be relatively accepted in soot combustion.
研究领域:
环境科学
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催化材料科学
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ACS Applied Materials & Interfaces
·
2026
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IF 7.8
Sifan Sun,Jiawei Li,Qianzuo Liu,Binqi He,Haoran Yang,Xinyue Xiang,Ying Hao,Xuehua Yan,Ting Zhang,Tie Li
Hydrogen peroxide (H2O2) is an indispensable mediator in cellular signaling pathways, playing a multifaceted role in biological systems. The development of advanced catalysts derived from flexible sensors for the real-time monitoring of dynamic H2O2 in vivo remains an important research issue. Recently, dual single-atom catalyst-based nanozymes exhibit synergistically enhanced catalytic performance, displaying excellent potential for H2O2 detection. Nevertheless, rationally regulating the geometric structures and electron transfer between the two metals still pose significant challenges. Hence, in this study, an advanced Fe/Ce dual single-atom catalyst (Fe/Ce–C)-based nanozyme was constructed, which proposes a Ce single-atom doping strategy to alter the electronic structure of Fe single-atom sites, endowing it with a high adsorption energy for hydroxyl groups to reduce the energy barrier of H2O2 in the reaction. This Fe/Ce–C achieves a linear sensing behavior in the range of 0.5–10,000 μM with a response speed of 1.4 s, a detection limit of 0.223 μM, and a sensitivity of 213 μA/mM·cm2. Furthermore, the nanozyme-derived flexible electrochemical sensor was assembled for real-time monitoring of H2O2 concentration changes in the brains of living rats, exhibiting long-term detection capability and excellent in vivo biocompatibility. Such an Fe/Ce dual single-atom nanozyme-based electrochemical sensor can serve as a promising tool for monitoring diseases like Parkinson’s.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Zhaoyubo Zeng,Yunzhong Liu,Yingxiang Zhang,Zhiguang Zhou,Xiaohui Liu
While ensuring good resistance to hydrothermal or high-temperature aging of zirconia ceramics, constant attempts to understand and improve their fracture toughness remain the focus. In this work, 0.1–0.3 mol.% of La 2 O 3 was doped into a 1.5 mol.% Y 2 O 3 +5.5 mol.% CeO 2 co-stabilized zirconia ceramic (C1.5Y5.5Ce) based on a coating route. Compared with conventional 3 mol.% Y 2 O 3 stabilized zirconia (C3Y), their microstructure, mechanical properties, and corresponding toughening mechanisms were studied by XRD , SEM, Raman spectroscopy , XPS and TEM . Non-transformable t’ zirconia phase was found in both Ce–Y and Ce–Y–La co-stabilized ceramics. Tetragonal to monoclinic (t-m) phase transformation toughening combined with ferroelastic domain toughening is considered to be the primary toughening mechanism of these ceramics. Doping of La 2 O 3 causes significant grain refinement, which increases the hardness and facilitates the ferroelastic domain switching. The oxygen vacancy concentration and the valence state of cerium are also affected, resulting in a change in the tetragonal stability. Although with a lower t-m transformation rate, the 0.3 mol.% La 2 O 3 doped C1.5Y5.5Ce possessing the smallest grain size shows a high fracture toughness of 10.17 MPa m 1/2 , which is about 23% higher than that of C3Y.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Yun-Xi Jiang,Shu-Fei Yin,You-Lin Zhang,Pan Liu,Hao Li,Lian-Kui Wu,Fa-He Cao
Conventional epoxy coatings rely primarily on passive barrier effects and therefore lack the ability to regulate interfacial corrosion processes after local damage. Here, a physicochemically regulated active/passive epoxy coating is developed by incorporating a phytic acid–loaded cerium-based metal–organic framework (CeMOF-P) as a functional colloidal additive. Owing to the confinement and coordination effects of the CeMOF framework, phytic acid is stably immobilized and uniformly dispersed, resulting in improved coating compactness and interfacial adhesion. Electrochemical impedance spectroscopy shows that the CeMOF-P–modified coating exhibits markedly enhanced corrosion resistance and, more importantly, a characteristic non-monotonic impedance evolution with pronounced impedance recovery upon damage, indicating an interfacial regulation mechanism beyond passive shielding. Mechanistic analyses reveal that corrosion-triggered, coordinated release of Ce 3+ /Ce 4+ species and phytic acid leads to the in situ formation of a compact cerium–phosphate–rich interfacial film, which simultaneously suppresses anodic dissolution and cathodic reactions. These results demonstrate that Ce–P synergy enables continuous interfacial regulation rather than transient passivation, providing mechanistic insight into the role of coordination chemistry and colloidal confinement in governing interfacial electrochemical behavior and stability in protective coating systems.
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CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Wenjing Chen,Huan Tang,Han Li,Yu Zhao,Xiaozhi Wang,Jiachao Chen,Zhihui Chen,Yaxian Zhu,Wenlan Yang
Fluoride contamination is a serious problem of global concern, and water decontamination from fluoride remains an imperative but also a challenging task. Recently, Ce-Fe bimetal oxyhydroxides (CFBOs) nanoparticles of sufficient hydroxyl group and high reactivity have exhibited unique advantages for specific fluoride elimination. Unfortunately, they are difficult to apply directly in scale-up water treatment due to their ultrafine nature. Herein, we fabricated a novel polymer-based Ce-Fe bimetal oxyhydroxides nanocomposite, i.e., CFBOs@201, by co-precipitation of Ce/Fe oxides nanoparticles inside a porous polystyrene anion exchanger D201. The material characterization results confirmed that CFBOs were successfully immobilized inside the pores of D201 with nanoscale and micro crystalline nature, and the shielding effect of the host D201 significantly improved the chemical stability of CFBOs against pH variation (3–12). As compared with cerium and ferric (hydr)oxides nanocomposites (HCO@201 and HFO@201) and its host D201, CFBOs@201 exhibited superior capacity and better selectivity for fluoride adsorption. Thanks to the inner-sphere complexation between immobilized CFBOs and fluoride, the concomitant competing anions exerted negligible effect on the defluoridation efficiency of CFBOs@201. Fluoride uptake onto CFBOs@201 agreed well with the pseudo-second-order kinetic model and the Langmuir isotherm model, and the calculated maximum adsorption capacity was 65.99 mg/g. The exhausted CFBOs@201 could be efficiently regenerated by a simple alkaline treatment for cyclic utilization with constant defluorination performance. Fixed-bed assays demonstrated that the encapsulating of CFBOs nanoparticles enhanced the effective treatment capacity of CFBOs@201 by 10–12 times over the host D201 irrespective of whether synthetic wastewater or mine drainage was the feeding solution. The above results verified that CFBOs@201 is a new kind of efficient defluoridation adsorbent with practical application prospect.
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International Journal of Environmental Research and Public Health
·
2022
·Vol. 19
·期 24
·16879
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IF 4.614
Tong Li,Zhibo Wang,Yue Shi,Xiaolong Yao
Based on the porous carbon material from citric acid residue, catalysts of different Ce-Mn ratios were prepared with incipient-wetness impregnation (IWI) to delve into their acetone-degrading performance and relevant mechanisms. When the Ce-Mn molar ratio is 0.8, the prepared catalyst Ce0.8-Mn/AC shows abundant and uniformly dispersed Mn and Ce particles on the surface. The content of Mn and Ce on the Ce0.8-Mn/AC surface reaches 5.64% and 0.75%, respectively. At the acetone concentration of 238 mg/m3(100 ppm), the laws of acetone degradation in different catalysts at different catalyzing temperatures and with various oxygen concentrations were studied, and we found that the rate of acetone degradation by Ce0.8-Mn/AC can exceed 90% at 250 °C. Cerium oxide and manganese oxide are synergistic in the catalytic degradation of acetone. Adding cerium to manganese-based catalysts can increase the oxygen migration rate in the catalysts and thus raise the reduction rate of lattice oxygen in manganese oxide. The results offer new ideas and approaches for the efficient and comprehensive utilization of bio-fermentation by-products, and for the development of cheap and high degradation performance catalysts for acetone.Keywords:acetone;Ce0.8-Mn/AC;efficient degradation;low temperatures
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Wenlan Ji,Yuan Wang,Yuanjie Xiong,Tian C. Zhang,Shaojun Yuan
To strengthen the utilization of free radicals and effectively enhance electrocatalytic performance and service lifetime of the β -PbO 2 electrode, herein, a novel hydrophobic TNAs/SnO 2 /PPy/ β -PbO 2 -Ce-SDS (abbreviated as β -PbO 2 -Ce-SDS) anode was synthesized by doping Ce 3+ and anionic surfactant (SDS) to TNAs/SnO 2 /PPy/ β -PbO 2 (abbreviated as β -PbO 2 ), which was constructed by growing SnO 2 /PPy/ β -PbO 2 multilayers on TiO 2 nanotube arrays (TNAs) via combination of electrodeposition and electro-polymerization processes. Notably, co-modification with Ce 3+ and SDS remarkably enhanced the surface hydrophobicity, electrochemical performance and catalytic ability of β -PbO 2 anode. Such β -PbO 2 -Ce-SDS anode not only substantially enhanced the As(III) conversion (96.96%) in the electrocatalytic oxidation process, but also prominently strengthened its service lifetime. Furthermore, the as-prepared β -PbO 2 -Ce-SDS anode possessed an excellent stability as its kinetic constant was only reduced from 0.18 to 0.14 min −1 even underwent 10 cycles of the electrocatalytic process, while that of the unmodified β -PbO 2 electrode decreased markedly by about 49%, owing to its appropriate surface hydrophobicity, smaller grains and denser β -PbO 2 layer. The reaction mechanism of electrocatalytic oxidation was associated with synergistic effects of hydroxyl radical ( OH), superoxide radicals ( O 2 − ), and sulfuric acid root radicals ( SO 4 − ). The β -PbO 2 -Ce-SDS anode provides a novel and feasible approach to development of various electrodes by doping metal ions and/or regulating with surfactants.
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Materials Today Communications
·
2022
·
IF 3.662
Shixing He,Lieshan Wu,Yalin Zeng,Bing Jia,Liuling Liang
Modified biochar (Ce-Ag-BC) was successfully prepared by using Camellia oleifera shell and doping with cerium (Ce) and silver (Ag). Through the results of BET, SEM, XRD , FTIR, and XPS, Ce and Ag were successfully embedded on biochar and participated in the sulfathiazole (STZ) adsorption. After being modified, high adsorption capacity of STZ on Ce-Ag-BC was observed. The maximum adsorption amount of STZ on Ce-Ag-BC was 261.84 mg/g, which was increased by more than six times compared to raw biochar (BC, 42.41 mg/g). The adsorption kinetics and isotherm on Ce-Ag-BC could be better fitted to pseudo-second-order kinetic and Langmuir isotherm model, respectively, indicating that the adsorption is mainly controlled by chemisorption and can be described as a monolayer process. The STZ adsorption process on Ce-Ag-BC is a spontaneously endothermic reaction. Besides, the adsorption mechanism on Ce-Ag-BC mainly involves pore filling, π-π interaction, hydrogen bonding , and electrostatic attraction.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Haiping Zhao,Ziyi Zhang,Yong Han,Weixia Yang,Wenzhi Tang,Tianli Yue,Zhonghong Li
A nanocomposite (UiO-66/Ce-MnO 2 ) was fabricated by combining UiO-66 with cerium-doped manganese dioxide (Ce-MnO 2 ) for colorimetric detecting vitamin C (Vc). Compared with traditional artificial enzymes, the as-synthesized UiO-66/Ce-MnO 2 were simple to prepare and did not require the participation of other active substances. The doping of cerium increased the oxygen vacancies and the UiO-66 as a carrier improved the dispersibility. The formation of superoxide anion (O 2 − ) and the inside Ce 4+ /Ce 3+ and Mn 4+ /Mn 3+ redox couples of UiO-66/Ce-MnO 2 endowed UiO-66/Ce-MnO 2 with a high catalytic capability, which could catalytically oxidize 3, 3′, 5, 5′-tetramethylbenzidine (TMB) into oxidation state TMB (oxTMB) without H 2 O 2 , accompanying with color change and a prominent peak at 652 nm in UV–vis spectra. Based on the inhibitory effects of Vc on catalytic oxidation of TMB, detection of Vc can be achieved, exhibiting a linear relationship in the concentration of 1.13–17.01 μmol L −1 with a low detection limit of 65.82 nmol L −1 . This system can also be detected by smartphone, the linear detection range is 12.47–22.67 μmol L −1 . Vc contents in fruits and vegetables detected by the sensor were in good agreement with the 2, 4-Dinitrophenylhydrazine colorimetry method ( P > 0.05), indicating a reliable sensor for Vc detection.
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