Small
·
2022
·Vol. 18
·期 23
·2201200
·
IF 15.153
Peng Jing,Peixin Liu,Minghao Hu,Xuan Xu,Baocang Liu,Jun Zhang
Electrochemical nitrogen reduction powered by renewable electricity is a promising strategy to produce ammonia. However, the lack of efficient yet cheap electrocatalysts remains the biggest challenge. Herein, hybrid Cu 2 O-CeO 2 -C nanorods are prepared on copper mesh through a metal-organic framework template route. The Cu-loaded Ce-MOF is thermally converted to Cu 2 O-CeO 2 heterojunctions with interfacial Cu-[O X ]-Ce structures embedded in carbon. Theoretical calculations reveal the lower formation energy of oxygen vacancies in Cu-[O X ]-Ce structures than in the Cu 2 O or CeO 2 phase. The Cu-[O X ]-Ce structures with oxygen vacancies enable the formation of interfacial electron-rich Cu(I) species which show significantly enhanced performance toward electrocatalytic nitrogen reduction with an NH 3 yield of 6.37 × 10 −3 µg s −1 cm −2 and a Faradaic efficiency of 18.21% in 0.10 m KOH at −0.3 V versus reversible hydrogen electrode. This work highlights the importance of modulation of charge distribution of Cu-based electrocatalysts to boost the activity toward nitrogen reduction.
研究领域:
电化学
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材料科学
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催化
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可再生能源
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DOI
PubMed
高影响因子
Fundamental Research
·
2021
·
IF 0
Huilin Wang,Xiaoxiao Han,Lingling Zhang,Ke Wang,Rui Zhang,Xiao Wang,Shuyan Song,Hongjie Zhang
The development of bifunctional electrocatalysts for overall water splitting is highly desired for converting electricity into chemical energy. However, the synthesis of high-performance bifunctional electrocatalysts remains a pressing challenge. Here, we found that both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performance of the Co 3 S 4 electrode can be significantly improved by integration with CeO 2 . Specifically, as-prepared 5% Ce-Co 3 S 4 and 1% Ce-Co 3 S 4 delivered low overpotentials of 290 and 257 mV to achieve 10 mA cm −2 for the OER and HER in 1.0 M KOH, respectively. The crucial role of CeO 2 originated from its unique surface with abundant oxygen vacancies, which were beneficial for the stabilization of Co 2+ sites with high OER activity and both the adsorption and dissociation of water molecules in the HER process. This work is expected to provide a general approach to prepare a wide range of high-performance electrode materials for energy-related applications.
研究领域:
电化学
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材料科学
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能量转换
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DOI
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Lihong Zhang,Yuhang Qi,Jinghui Lai,Xilian Hu,Bibo Yu,Ziyang Li,Shengli Wang,Chong Luo
An ultra-smooth silicon carbide (SiC) wafer surface is critical for the performance and longevity of semiconductor, optoelectronic, and high-temperature devices. In this study, a novel photocatalytic chemical mechanical polishing (CMP) strategy is proposed using Ag-loaded CeO 2 abrasives, in which Ag establishes strong electronic metal–support interactions (EMSI) with CeO 2 . This system achieves an ultra-low surface roughness of 0.086 nm while maintaining a high material removal rate of 445.5 nm/h. Under UV illumination, Ag nanoparticles function as electron sinks, suppressing electron–hole recombination and promoting the generation of reactive oxygen species (•OH and •O 2 − ), which rapidly oxidize the SiC surface into a softer SiO 2 layer. Concurrently, oxygen vacancies in CeO 2 act as critical active sites for Ce–O–Si bond formation, facilitating mechanical removal. The incorporation of Ag also effectively stabilizes oxygen vacancies by suppressing their passivation in strongly oxidizing slurries, thereby preserving their reactivity and enhancing the mechanical removal efficiency. This CeO 2 -based metal–support architecture furnishes advanced mechanistic insights and strategic design principles for CMP processes predicated on oxidation-facilitated removal pathways.
研究领域:
材料科学
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半导体加工
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表面工程
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催化
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纳米技术
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2025
·
IF 7.7
Kelin Hu,Tao Li,Xinyuan Li,Jing Zhang,Yu He
Acetylene is of great significance for early warning gas of thermal runaway in lithium-ion batteries (LIBs). In this work, we designed a structure of nanoparticle decorated In 2 O 3 /CeO 2 nanofibers and prepared them by electrospinning. Then we regulated the sensing properties by doping Ag, and acquired an optimal sensor for detecting C 2 H 2 gas. Morphology and structure have been characterized. The gas sensor exhibited good response for acetylene. In a low temperature of 160 °C, the response (R a /R g ) exceeded 9.7 in C 2 H 2 gas with a concentration of 100 ppm. Rapid response in 45 s, and outstanding long-term stability have also been proved. The key point was that the sensor can all achieve a response over 2 within the temperature range of 20 °C to 220 °C. This temperature range coincides with the internal temperature variation range of LIB cells including the normal condition and early stage of thermal runaway. Meanwhile, the reproducibility of electrospinning method has already been verified. Furthermore, we fabricated the LIBs implantable sensor and tested its built-in stability, then we found that the sensor had a highly differentiated response signal to distinguish C 2 H 2 gas and temperature. Finally, according to the nanostructure of sensing materials, acetylene sensing mechanism has been proposed.
研究领域:
材料科学
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电化学
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传感器与检测
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储能技术
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纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Xinyang Liu,Fengyu Wu,Tongbo Zhang,Fenyang Tian,Menggang Li,Weiwei Yang,Yongsheng Yu
The multi-interface structure plays a crucial role in facilitating the effectiveness of electromagnetic wave (EMW) absorption in nanomaterials. However, designing and fine-tuning such structure remain challenging due to the limited understanding of the relationship between structural characteristics and dielectric loss properties. Herein, we present a sponge-structured dual-core @ shell CoFe 2 O 4 /CeO 2 @C nanocomposite featuring abundant heterojunctions and robust dielectric-magnetic coupling networks. This design aims to attain excellent impedance matching and significantly enhance EMW absorption performance of the nanocomposite. Specifically, CoFe 2 O 4 /CeO 2 @C nanocomposite achieves an effective absorption bandwidth (EAB) of 6.13 GHz with a thickness of merely 2.2 mm. The exceptional EMW absorption performance can be attributed to the synergistic effect of multi-loss mechanisms, including interfacial polarization induced by the porous dual-core @ shell structure, oxygen vacancy defects arising from the intrinsic structural characteristics of CeO 2 and conductive loss brought by reversible migration of Co 2+ /Fe 3+ and Ce 3+ /Ce 4+ . This study offers a robust strategy for the advancement of ferrite-based composites with enhanced dielectric properties and offers novel insights for the design of broadband EMW absorbing materials.
研究领域:
材料科学
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电磁功能材料
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纳米复合材料
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介电性能
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波吸收
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产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2025
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IF 6.1
Xiaona Ren,Zhipei Chen,Peng Wang,Wenchang Wang,Yao Wang,Changchun Ge
Rare earth oxide (CeO₂/Y₂O₃) reinforced AlCrFeNiCu high-entropy alloy coatings with a Mo interlayer (designated as Mo/CeO₂-AlCrFeNiCu and Mo/Y₂O₃-AlCrFeNiCu) were successfully deposited onto a Zr-4 substrate via high-speed laser cladding. The microstructural characteristics and properties of the composite coatings were comprehensively investigated. The results demonstrate that the Mo interlayer alleviates the thermal mismatch between the substrate and the HEA coatings and, to a certain degree, counteracts the grain refinement effect induced by the rare earth oxides. Overall, it plays a critical role in enhancing interfacial structural stability, mitigating thermal stress, and improving overall coating performance. It effectively optimizes the coating-substrate bonding integrity, reduces susceptibility to high-temperature fretting fatigue and plastic deformation, and significantly lowers the specific wear rate. Furthermore, the Mo interlayer enhances the compactness and continuity of the interface, suppresses the formation of corrosive pathways, and promotes the formation of a thicker, more stable passive film on the coating surface.
研究领域:
材料科学
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表面工程
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金属学与热处理
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腐蚀与防护
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先进制造技术
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Yalei Ding,Jiejie Wang,Shanshan Xu,Kun-Yi Andrew Lin,Shaoping Tong
In order to completely mineralization of contaminants, it is necessary to develop new methods which can effectively degrade final products of chemical oxidation. Acetic acid (HAc) has been considered one of the typical end products of chemical oxidation of pollutants and thus chosen as a representative target pollutant in the study. Nano-cerium oxide (CeO 2 ), an environment-friendly rare-earth material, was prepared to catalytic ozonation of HAc in acidic solutions. Experimental results show that the prepared CeO 2 could greatly enhance efficiency of H 2 O 2 /O 3 , and also have good stability and recyclability. The Raman spectra indicate that H 2 O 2 interacts with oxygen vacancies of CeO 2 to form peroxide-like species, which could effectively initiate the decomposition of ozone to produce hydroxyl radicals. A mechanism is proposed to explain the activity of peroxide-like species for the decomposition of ozone. The effects of different parameters such as initial pH value, catalyst dosage, and the concentration of H 2 O 2 are also investigated. The results indicate that the CeO 2 /H 2 O 2 /O 3 may provide a convenient and effective method for degrading refractory organic pollutants in acidic wastewaters.
研究领域:
环境科学
·
催化化学
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DOI
高影响因子
Chemical Engineering and Processing-Process Intensification
·
2026
·
IF 4.2
Hongyan Huang,Zihao Li,Zewen Chen,Shengji Wu,Hui Wang,Jie Zhou
As primary precursors of particulate matter (PM), volatile organic compounds (VOCs) and soot have emerged as major contributors to air pollution in recent decades. It is urgent and significant to develop high-performance catalysts for the catalytic oxidation of VOCs and soot. In this work, we report a feasible approach for the preparation of Ag-supported CeO 2 catalysts (Ag/CeO 2 -HP) via the combination of impregnation and plasma treatment, and evaluate their performance in catalytic oxidation. Comprehensive characterization results demonstrate that the non-thermal plasma treatment can effectively enhance the dispersion of Ag nanoparticles and enrich the concentration of surface oxygen vacancies in the catalyst. Furthermore, Ag/CeO 2 -HP possesses the highest concentration of the highly surface active oxygen species. Thus, Ag/CeO 2 -HP exhibits the highest catalytic activity for catalytic oxidation of VOCs and soot among all the catalysts prepared. The T max value for soot over Ag/CeO 2 -HP is 383 °C, compared to 409 °C over Ag/CeO 2 prepared by the conventional equivalent-volume impregnation method. Under demanding reaction conditions (1000 ppm hexane, GHSV 75,000 h −1 ), the T 98 values for n-hexane over the Ag/CeO 2 -HP and Ag/CeO 2 catalysts are 295 and 339 °C, respectively. The work provides an efficient strategy to prepare supported catalysts with enhanced catalytic activity.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Xiazhang Li,Xikai Lu,Siyuan Zhou,Chao Yao,Yongsheng Chen
The emission of volatile organic compounds (VOCs) poses severe environmental and health risks. Constructing stable atomically-dispersed catalysts for low-temperature VOC oxidation remains challenging. Herein, we report a directional photodeposition strategy to anchor atomically dispersed Pd onto an attapulgite (ATP) nanomineral supported CeO 2 composite, where the ATP facilitates the formation of abundant lattice oxygen vacancies in CeO 2 . Under light irradiation, surface oxygen vacancies migrate and interact with Pd species, enabling selective coordination and reductive deposition. The 0.1%Pd/CeO₂/ATP catalyst achieves 99% toluene conversion at 205 °C (T₉₉ = 205 °C) at a gas hourly space velocity (GHSV) of 20,000 mL·g −1 ·h −1 . In situ experiments and DFT calculation reveal that atomically dispersed Pd atoms form stable Pd–O–Ce bonds with oxygen vacancies sites on the CeO 2 surface, effectively modulating the electronic structure of the active sites . These atomically dispersed Pd catalysts significantly enhance oxygen activation capability and the oxidation efficiency of reaction intermediates through the unique Pd–O–Ce coordination structure. This work provides valuable insights into vacancy-mediated atomic-scale engineering as a strategy for designing efficient environmental catalysis.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.7
Huijie Wang,Jiaxin Li,Zixiang Jiao,Xiaodan Zheng,Wei Ma,Kesheng Cao,Lingwei Xue,Fu Xu,Yang Wan,Yangyang Yang,Binrong Li,Pengwei Huo
The efficient removal of antibiotic residues such as tetracycline (TC) from water remains challenging. Research has demonstrated that heterogeneous systems utilizing photocatalysis to activate peroxymonosulfate (PMS) exhibit exceptional performance. However, preparing materials with strong charge transfer capabilities and stability still poses certain challenges. This study developed a Cu x O/CeO 2 heterojunction composite with abundant oxygen vacancies (O V ) for visible-light-driven activation of peroxymonosulfate (PMS). The hierarchical flower-sphere structure of CeO 2 provides ample adsorption sites and mass transfer channels, while the synergy between the heterojunction interface and the dual redox cycles of Cu + /Cu 2+ and Ce 3+ /Ce 4+ significantly enhances visible-light absorption and accelerates the separation and transfer of photogenerated carriers. Femtosecond transient absorption (fs-TA) spectroscopy further confirms that the formation of the heterojunction effectively regulates the direction of carrier transfer and prolongs the charge lifetime. Density functional theory (DFT) calculations reveal that O V markedly promote the adsorption and activation of PMS. Under visible light irradiation, the system achieves a TC degradation efficiency of 99.2% within 60 min, primarily driven by sulfate radicals (SO 4 •− ) and hydroxyl radicals (•OH), with the intermediates exhibiting generally low toxicity. In addition, in-situ infrared spectroscopy (in-situ FT-IR) further confirmed the outstanding TC adsorption capacity and degradation activity of the Cu x O/CeO 2 heterojunction composite. This work provides insightful perspectives for designing efficient and stable heterojunction catalysts through defect and interface engineering for water purification.
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DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2026
·
IF 9.6
Ziyan Liu,Xuetong Wang,Ziyang Liu,Jing Jiang,Xiao Lin,Zhe Xiao,Ping Zhang,Huan Zhou,Lei Yang
Precise control of reactive oxygen species (ROS) is indispensable during tissue repairing. Inorganic nanozymes such as cerium dioxide (CeO 2 ) have emerged as potent ROS modulators, however, their fixed catalytic activity prevents on-demand adaptation to the rapidly changing immune microenvironment. Here, we reported a magnetically responsive dynamic antioxidant system that autonomously tunes its ROS-scavenging capacity on demand. Selenium (Se) doping was first exploited to engineer high-density oxygen vacancies (Vo) in the CeO 2 lattice, enabling the nanozyme intrinsic antioxidant activity enhancement. Its catalytic efficiency could be further amplified under a static magnetic field (SMF). In vitro analysis revealed that Se-CeO 2 under SMF significantly promoted the polarization of macrophages toward the pro-regenerative M2 phenotype. The as-prepared Se-CeO 2 was subsequently loaded into a sodium alginate–hyaluronic acid hydrogel (SCSH-Gel), witnessed to protect chondrocytes and fibroblasts from oxidative stress in vitro. Followed in vivo tests found SMF and Se-CeO 2 synergistically accelerate neocartilage formation in a cartilage defect model and promoted re-epithelialization in a full-thickness skin-wound model. Collectively, our results demonstrated that Se doping coupled with magnetic actuation enables inorganic nanozymes to dynamically modulate ROS homeostasis, offering a versatile strategy for precisely programming the microenvironment to facilitate tissue regeneration.
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Sciences
·
2015
·
IF 2.002
Lei Chen,Zhichun Si,Xiaodong Wu,Duan Weng,Zhenwei Wu
A MnO x –NbO x –CeO 2 catalyst for low temperature selective catalytic reduction (SCR) of NO x with NH 3 was prepared by a sol–gel method, and characterized by NH 3 –NO/NO 2 SCR catalytic activity , NO/NH 3 oxidation activity, NO x /NH 3 TPD , XRD , BET, H 2 -TPR and in-situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS). The results indicate that the MnO x –NbO x –CeO 2 catalyst shows excellent low temperature NH 3 -SCR activity in the temperature range of 150–300°C. Water vapor inhibits the low temperature activity of the catalyst in standard SCR due to the inhibition of NO x adsorption. As the NO 2 content increases in the feed, water vapor does not affect the activity in NO 2 SCR. Meanwhile, water vapor significantly enhances the N 2 selectivity of the fresh and the aged catalysts due to its inhibition of the decomposition of NH 4 NO 3 into N 2 O.
研究领域:
环境催化
·
大气污染控制
·
材料化学
·
表面科学
·
化学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）