APPLIED CATALYSIS B-ENVIRONMENTAL
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2014
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IF 6.007
Moa Z. Granlund,Kjell Jansson,Marita Nilsson,Jazaer Dawody,Lars J. Pettersson
The objective of this paper was to study the influence three promoters (Co, La, Mn) had on the catalytic activity of Rh-based catalysts for autothermal reforming of diesel. The catalysts were supported on CeO 2 -ZrO 2 and the loading was 1 wt.% Rh and 6 wt.% promoter. The catalytic activity was evaluated in a monolith bench scale reactor with Swedish Environmental diesel, MK1. The process parameters employed at the ATR experiments were; O 2 /C ∼ 0.45, H 2 O/C ∼ 2.5 and GHSV ∼ 50,000 h −1 , meanwhile the reactor temperature was ramped from 700 °C to 950 °C. The catalysts were compared based on their fuel conversion, H 2 yield and the selectivity of different short-chain hydrocarbons. The results showed that all three catalysts had both high fuel conversion and H 2 yield in the optimal ATR operation temperatures. The H 2 yield and fuel conversion were increasing in the order Rh/Mn, Rh/La, Rh/Co. To get further insight in the difference between the materials the fresh and aged catalytic materials were characterized. The characterization methods used were H 2 -temperature programmed reduction (H 2 -TPR), powder X-ray diffraction (XRD), and BET surface measurements. The BET surface measurements showed that promotion with La gave improved thermal stability of the material. The XRD showed a high dispersion of all metals except Co, which was present as crystals in the size range of the particles of the support.
研究领域:
催化
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化学工程
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环境科学
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高影响因子
Nanoscale
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2021
·Vol. 13
·期 38
·16349-16361
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IF 7.79
Shuoshuo Yang,Jiale Ji,Mengwei Luo,Hailing Li,Zhonghong Gao
Ceria (CeO2) based materials possess many antioxidant enzyme-like activities and unique properties for bone repair, but their free radical scavenging function is still insufficient. In order to deal with the complex oxidative stress environment in bone repair, multifunctional composite CeO2 nanozymes (CeO2NZs), featuring multiple antioxidative properties, were constructed via surface modification on CeO2NZs with nanoscale poly(tannic acid) (PTA) coatings. Moreover, we adjusted pH conditions (ranging from 4 to 9) to effectively control the formation and antioxidative properties of PTA coatings on CeO2NZ surfaces. Here, the physical properties of this novel inorganic and organic composite antioxidant, such as surface morphology, particle size, crystal structure, surface charge and element composition, were thoroughly characterized. The PTA/CeO2NZs showed obvious coating morphology under weak acid conditions (pH = 5–6), and the PTA layer at pH = 5 is about 1 nm in thickness. Compared with untreated CeO2NZs, the PTA/CeO2NZs showed stronger SOD-like activity and obviously higher free radical scavenging rate (for both ABTS+˙ and DPPH˙).Notably, this composite antioxidative nanozyme not only exhibited favorable cell proliferation of preosteoblasts (MC3T3-E1) but also provided strong antioxidative property to maintain cell vitality against H2O2 induced oxidative damage. In particular, this study provides new insights into the designing of surface polyphenolic coatings at the nanoscale, and these multiple antioxidative properties shown by PTA coated CeO2NZs make them suitable for protecting cells under the oxidative stress environment.
研究领域:
材料科学
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纳米技术
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生物材料
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细胞生物学
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生物医学工程
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 32
·44644-44657
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IF 7.8
Lun Dengxing,Zhao Ziming,Li Siying,Yuan Zhengbin,Yang Ruyi,Mou Leming,Zhu Wanping,Liu Liang,Wang Tingjun,Jia Xihui,Dong Yifeng,Wang Shaoqiang,Wei Zhijian,Wang Hongyu
Traumatic spinal cord injury (SCI) initiates a pathological cascade dominated by mitochondrial dysfunction and unregulated oxidative stress, collectively generating an inhibitory lesion microenvironment that abrogates endogenous neural regenerative capacity. Herein, we fabricate a multifunctional conductive hydrogel scaffold by incorporating Mo 2 Ti 2 C 3 MXene nanosheets, hollow CeO 2 nanoparticles, and neurotrophin-3 (NT-3) within a crosslinkable matrix. When paired with exogenous electrical stimulation (ES), this combinatorial therapeutic platform synergistically activates two core mitochondrial regulatory cascades in injured neurons: the PGC-1α/NRF1/TFAM axis governing mitochondrial biogenesis, and Mfn2/OPA1 signaling mediating mitochondrial fusion. Comprehensive in vitro characterizations validate the hydrogel’s favorable long-term cytocompatibility, robust reactive oxygen species (ROS) scavenging activity, tunable biodegradation kinetics, and sustained NT-3 delivery; together, these properties effectively restrain intracellular ROS overproduction and stabilize mitochondrial structural and metabolic homeostasis. In a mouse contusion SCI model, local implantation of the Mo 2 Ti 2 C 3 /CeO 2 /NT-3 hydrogel combined with intermittent electrical stimulation substantially alleviates secondary tissue damage by shrinking lesion cyst volume and attenuating glial scarring, which in turn promotes pronounced axonal sprouting and restores hindlimb locomotor function. By merging conductive biomaterial bridging with targeted mitochondrial homeostatic modulation, this work establishes a dual-modal therapeutic strategy with great translational potential for neural tissue engineering and post-SCI regenerative repair.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Qiyang Hong,Yinzheng Xia,Chen Wang,Yue Li,Qianhong Shen,Hui Yang
Cerium-based oxides have been widely reported as nanofillers to enhance the corrosion resistance and UV-aging stability of epoxy coatings. However, their protective performance primarily originates from defect states associated with Ce 3+ and oxygen vacancies in the lattice, which are typically present in limited quantities. In this study, zirconium-doped cerium oxide (CeZrO x ) nanoparticles were anchored onto hydroxylated boron nitride nanosheets (BNNSs) via a hydrothermal method. Zr doping significantly increases the concentration of defect states, thereby improving the UV absorption capacity and antioxidant activity of the nanofillers. The heterostructured BNNSs not only reduce the agglomeration of CeZrO x nanoparticles but also provide an effective passive barrier against corrosion. Electrochemical analyses revealed that cerium-based oxides increased the corrosion potential and influenced the anodic corrosion process, while Zr doping further promoted the formation of a dense protective Fe 3 O 4 passive film at the metal/coating interface. When incorporated into a waterborne epoxy matrix, CeZrO x @BNNS-EP exhibited markedly improved anticorrosion and anti-UV performance compared with coatings containing undoped CeO 2 @BNNS. After 24 h of UV aging, CeZrO x @BNNS-EP maintained an impedance modulus of 1.99 × 10 9 Ω/cm 2 after 12 d ays of immersion in 3.5% NaCl solution, which was eight times higher than that of the undoped counterpart. These enhancements are attributed to the increased antioxidant capacity and free-radical scavenging activity imparted by Zr doping, which facilitate anodic passivation during corrosion and mitigate UV-induced degradation. Overall, this work provides both mechanistic insight and practical guidance for the rational design of cerium oxide–based nanofillers for corrosion- and UV-resistant coatings.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Minghao Shi,Jihui Yang,Mingjia Zhang,Shule Zhang,Qin Zhong
The Ce-based catalysts show promising activity in the selective reduction of NO x with NH 3 (NH 3 -SCR) at medium and low temperatures, yet their limited sulfur tolerance hinders broader application. We have developed a catalyst by confining CeO 2 within the mesopores of ZSM-5 zeolite (CeO 2 @ZSM-5), resulting in uniform dispersion and ultra-small CeO 2 nanoparticles (<10 nm). This distinctive structure enhances the interaction between the carrier and active species, reducing the catalyst's surface basicity and its affinity for acidic SO 2 gas. Additionally, the small CeO 2 particle size leads to an increased Ce 3+ concentration, which inhibits the reaction between Ce active sites and SO 2 . Employing a dual strategy of reducing adsorption and inhibiting reactions, we significantly minimized the impact of SO 2 on NH 3 -SCR. Impressively, common Ce-based catalysts become deactivated due to the formation of corresponding sulfates through reaction with SO 2 , however, CeO 2 @ZSM-5 achieves NO x conversion above 98% and N 2 selectivity of 100% within the temperature range of 250 °C to 450 °C. The addition of 100 ppm SO 2 does not significantly affect NH 3 -SCR activity. This study provides an effective approach to mitigate SO 2 adsorption and reactions, offering a valuable strategy for the development of highly efficient sulfur-resistant catalysts.
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高影响因子
Journal of Environmental Chemical Engineering
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2026
·
IF 7.5
Zhiheng Pang,Fang Cui,Tieyu Cui
Although FeNi intermetallic compounds (IMCs) are promising pre-catalysts for the oxygen evolution reaction (OER) due to their ability to in-situ form a stable Ni 1-x Fe x OOH active layer, their activity is ultimately limited by the saturation of Fe 3+ incorporation into the lattice. To overcome this limitation, we introduce CeO 2 as an external electron regulator to construct a carbon-coated heterostructure (C@CeO 2 /FeNi). At the interface, CeO 2 acts as an electron pump, working synergistically with Fe 3+ to enable deep electronic modulation of the self-deposited active layer, thereby breaking through the performance ceiling of FeNi IMCs. The optimal C@CeO 2 /FeNi-0.3 catalyst achieves a low overpotential of only 211 mV at a current density of 10 mA cm -2 and a small Tafel slope of 54 mV dec -1 in 1.0 M KOH, significantly surpassing its CeO 2 -free counterpart. In addition, it exhibits remarkable stability: after continuous electrolysis for 100 hours at overpotentials of 230 and 350 mV, the activity of this material decays by only 10% and 8.3%, respectively. This work demonstrates that interfacial electron-pump engineering is an effective strategy to push the performance boundaries of alloy-based OER catalysts.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
·
IF 4.7
Yizhi Zeng,Xianghong Ren
Unsymmetrical dimethylhydrazine (UDMH), as a high-energy liquid rocket fuel widely used for energy liquid rocket fuel, inevitably produces huge volumes of UDMH wastewater during use. As UDMH and its byproducts are both highly toxic, this poses a severe threat to ecological environment and human health, making it an urgent need to develop an efficient, environmentally friendly treatment for UDMH wastewater. Photocatalytic technology has emerged as a research hotspot in the field of water pollution control owing to its low cost and eco-friendliness. In this study, a (001) facet-dominated 001-TiO 2 /CeO 2 S-scheme heterojunction was constructed via a solvothermal-photoassisted method, effectively achieving primary carrier separation. Under simulated solar irradiation, this structure achieved a 98.7 % degradation efficiency for 100 mg/L UDMH wastewater within 140 min, with degradation rate constants 3.8 times and 5.5 times higher than those of 001-TiO 2 and P25, respectively. To address the challenge of recovering powdered photocatalysts, this study immobilized the nanopowders using a silver conductive adhesive, creating a two-dimensional conductor interface for electron transport and a nanoparticle structure for hole retention, thereby enabling secondary carrier separation. Under simulated solar irradiation, this immobilized structure achieved a 75.1 % degradation efficiency for 100 mg/L UDMH wastewater within 420 min. More importantly, it demonstrated excellent reusability and recyclability. This study provides a practical and feasible approach for the efficient degradation of UDMH wastewater.
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高影响因子
JOURNAL OF CATALYSIS
·
2021
·
IF 7.92
Jiawei Ji,Meizan Jing,Xiuwen Wang,Wei Tan,Kai Guo,Lulu Li,Xin Wang,Wang Song,Lijun Cheng,Jingfang Sun,Weiyu Song,Changjin Tang,Jian Liu,Lin Dong
The occurrence of NH 3 -SCR (selective catalytic reduction of NO with NH 3 ) reaction on catalyst surface typically requires acid and redox sites. However, the role of acid-redox interaction on NH 3 -SCR performance is still obscure due to complex acidities and entangled acid-redox sites. Herein, three types of model Ce 2 (SO 4 ) 3 -CeO 2 catalysts with distinct interfaces are constructed to reveal the effect of acid-redox interaction on NH 3 -SCR performance. That is, SO 4 2- /CeO 2 -VS (vapor sulfation of ceria) with strong acid-redox interfacial contact, SO 4 2- /CeO 2 -WI (wet impregnation), and SO 4 2- /CeO 2 -SG (solid grinding) with limited interfaces. It is found the redox property is significantly disturbed as a result of the electron-withdrawing effect from the sulfate. Theoretical result unravels that the introduction of Ce 2 (SO 4 ) 3 retards the oxygen vacancy formation over CeO 2 . Due to restricted interfaces in SO 4 2- /CeO 2 -SG, the negative influence from acid sites is greatly alleviated. Further mechanism study discloses the weakened acid-redox interaction actually changes the nature of surface NO x species, resulting in the generation of reactive species (*O-N-O* and cis -N 2 O 2 2- ) and the promotion of surface reaction via Langmuir-Hinshelwood (L-H) mechanism.
研究领域:
催化化学
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环境科学
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材料科学
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Yiqing Zeng,Yanan Wang,Shule Zhang,Qin Zhong,Weilong Rong,Xiaohai Li
In this work, novel (CeO 2 ) x -(CePO 4 ) 1−x (defined as Ce x P 1−x ) nanorod composites were prepared by a simple co-precipitation method, and the influence of CeO 2 on the catalytic performance of CePO 4 for selective catalytic reduction of NO by NH 3 (NH 3 -SCR of NO) was investigated. The catalytic performance evaluation revealed that the Ce x P 1−x catalysts, especially Ce 0.2 P 0.8 exhibited a much better catalytic activity and H 2 O + SO 2 resistance than CePO 4 . Structure characterizations via high-resolution transmission electron microscope (HRTEM) and Brunauer-Emmett-Teller (BET) revealed that the introduction of CeO 2 had a little effect on the shape of CePO 4 nanorods and it could promote the formation of new mesoporous then significantly enhance the surface area of catalyst. The analysis results of active sites suggested that phosphorus was the main adsorption site for NH 3 and the redox sites were controlled by CeO 2 on Ce x P 1−x catalysts. Finally, reaction process study demonstrated that the NH 3 -SCR over Ce x P 1−x was processed via Langmuir-Hinshelwood (L-H) mechanism. Combining the results of active sites and reaction mechanism analysis, it was drawn that the superior low temperature activity of Ce x P 1−x could be attributed to its excellent redox properties, which promoted the oxidation of NO then facilitated the process of NH 3 -SCR via “fast SCR”.
研究领域:
材料科学
·
催化化学
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PubMed
高影响因子
TALANTA
·
2022
·
IF 6.556
Zhimin Liu,Jie Wang,Chen Cui,Limei Zheng,Leqian Hu
An ultrasensitive resonance energy transfer based “on-off” switch electrochemiluminescence (ECL) immunosensing strategy was proposed and applied for prostate specific antigen (PSA) detection. In detail, self-enhancing nanohybrids of nano-CeO 2 and AuNPs decorated graphitic carbon nitride quantum dots (CeO 2 –AuNPs–g-CNQDs) were synthesized, which produced high ECL emission with coreactant K 2 S 2 O 8 for “switch-on” state. Noticeably, due to the reversible Ce 3+ ↔ Ce 4+ reaction, nano-CeO 2 could serve as highly-efficient coreaction accelerator and induce the decomposition of S 2 O 8 2− into SO 4 • - , which endowed the g-CNQDs/K 2 S 2 O 8 system with enhanced ECL emission. Moreover, AuNPs acted crucial role in promoting the electronic transmission rate and providing sites to immobilize the biomolecules. On the other hand, the AgNPs-VB 2 nanocomposites were used as dual labels to quench the ECL signal of g-CNQDs-K 2 S 2 O 8 system via ECL-RET, leading to the decreased ECL for “switch-off” state. On the basis of sandwich-typed immunosensing strategy, the developed ECL immunosensing platform exhibited sensitive response to PSA in a linear range of 1.0 × 10 −5 _ 50 ng mL −1 with a low detection limit of 0.0045 pg mL −1 ( S/N = 3). This work provided a promising tool in early clinical diagnostics of prostate cancer.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2022
·
IF 5.477
Yanan Wei,Chunxiang Li,Chentao Zhu,Yunlei Zhang,Zhi Zhu,Yao Chen,Xin Li,Yongsheng Yan
Background The conversion of 5-Hydroxymethylfurfural into high value-added 2,5-furandicarboxylic acid is of great significance for industrial production and people's life. Rationally regulation of oxygen vacancy and reactant adsorption are keys to developing an efficient metal oxide catalyst for aerobic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid. Method In this research, nitrogen-doped porous carbon-supported Bi-doped CeO 2 (x%Bi-CeO 2 /N-PC T ) catalysts were successfully prepared by co-calcination method. Significant findings Oxygen vacancy concentration of CeO 2 can be effectively enlarged by Bi-doping, which was strongly related to the catalytic performance. In-situ FTIR and adsorption experiment results showed that the introduction of N-PC T can enhance the HMF adsorption performance of catalyst. Density functional theory calculation and XPS results proved that the HMF adsorption performance depend on content of graphitic N in N-PC T , thus effecting the catalytic performance of HMF oxidation. Synergistic effect of oxygen vacancy and HMF adsorption ability can enhance the catalytic performance, the FDCA yield of 10%Bi-CeO 2 /N-PC 800 was about 70 times higher than that of pure CeO 2 . 10%Bi-CeO 2 /N-PC 800 as support for Au nanoparticles demonstrated an excellent yield of FDCA (92.8%). This study provides a novel idea for design of CeO 2 -based catalyst for oxidation of HMF to high value-added downstream chemicals.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Pengxin Song,Renlu Han,Yun Gao,Zhen Guo,Xiangjun Wei,Na Li,Jiancheng Yu,Keqi Tang
Energy is the basis of survival for all organisms, and proliferative tumuor cells rely primarily on glycolysis to obtain energy to meet high bioenergetic demands. Glycolysis inhibition has emerged as a key target for cancer therapeutic applications. However, the therapeutic efficiency of glycolysis suppression is restrained by the mutual compensation of multiple energy-generating pathways and biological barriers in the complex tumuor microenvironment (TME). In this study, we developed polydopamine (PDA)-coated porous CeO 2-x nanorods with metformin (MET) and glucose oxidase (GOx) co-loading and bovine serum albumin (BSA) encapsulation (denoted as CPGMB) for dual-pathway glycolysis inhibition-boosted bioenergetic therapy with photothermal/chemodynamic therapy (PTT/CDT). MET and GOx are released due to the weakly acidic TME and the photothermal effect to suppress glycolysis via hexokinase 2 (HK2) inhibition and glucose deprivation pathways, respectively. Interestingly, H 2 O 2 produced by GOx-catalysed glucose oxidation was converted into O 2 by Ce 4+ , resulting in closed-loop glucose depletion, further potentiating glycolysis restraint via hypoxia relief. Meanwhile, H 2 O 2 could also be transformed into •OH by Ce 3+ for CDT. Furthermore, the photothermal effect of CPGMB ablated the cancer cells and amplified •OH production. In vitro and in vivo experiments confirmed the anti-tumour efficacy and biosafety of CPGMB. This study presents a novel strategy for a synergistic bioenergetic antitumour therapy.
研究领域:
癌症治疗
·
纳米医学
·
生物化学
·
诊疗学
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高影响因子
危险品化学品经营许可证（带存储）