APPLIED SURFACE SCIENCE
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2026
·
IF 6.6
Yukun Zhang,Jiandong Zheng,Ruijie Chen,Chong Chen
The modulation of the catalyst microstructure to facilitate the directional migration of photogenerated charge carriers represents an effective strategy for boosting photocatalytic activity. Based on the synergistic effects of crystal plane engineering and heterostructure modification, a series of BiOBr/CeO 2 S-scheme heterojunctions were fabricated for photocatalytic CO 2 reduction. By systematically regulating the exposed crystal facets and component ratios of CeO 2 , the interfacial interactions and electron transmission were optimized. Therein, the rod-like CeO 2 (R), predominantly exposing (110) facets, formed an intimately contacted interface with BiOBr, which significantly improved the charge separation efficiency. The abundant oxygen vacancies and unique S-scheme electron transfer pathway within the BiOBr/CeO 2 (R) nanocomposite cooperatively promoted CO 2 photoreduction by efficiently restraining carrier recombination and enhancing the utilization of photogenerated electrons. The corresponding catalyst BC-40(R) exhibited the best CO evolution rate of 131.8 μmol·g −1 ·h −1 , which was 8.8 times higher than that of pure CeO 2 (R). Furthermore, density functional theory (DFT) calculations further verified the charge transport pathways within the heterostructure. This study demonstrates the strategic integration of crystal facet engineering with S-scheme heterojunction, providing fundamental insights into the rational design of advanced photocatalysts.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Wujian Zhang,Jinghua Liu,Haodong Zhao,Jian Guan,Zhenxiang Li,Keyi Mou,Yuchen Chen,Zongjian Liu,Ying Li,Aimin Chen,Haodong Tang
Synergistic air-calcination and CO-reduction tailor the interfacial structure of Ru/CeO 2 catalysts. • Abundant Ru n+ –O V –Ce 3+ interfaces enhance low-temperature WGS performance. • Ru n + sites moderate CO adsorption and oxygen vacancies facilitate water dissociation. The catalytic efficiency of Ru/CeO 2 in the water–gas shift (WGS) reaction is frequently limited by its insufficient capacity to activate water molecules, which substantially impairs low-temperature performance. In this study, an interfacial engineering strategy combining air calcination with CO reduction is developed to construct a Ru/CeO 2 -R catalyst enriched with Ru n+ –O V –Ce 3+ interfacial structures. This specially designed interface significantly enhances the activity of low-temperature WGS. Advanced characterization techniques, including XPS, TEM, Raman spectroscopy, and in situ DRIFTS, demonstrate that Ru n + species reduce excessive CO adsorption, thereby enhancing reaction selectivity. Meanwhile, oxygen vacancies facilitate water dissociation and increase the reaction rate. Consequently, the Ru/CeO 2 -R catalyst achieves an impressive CO conversion rate of 9.56 mol CO ·g Ru −1 h −1 at 200 °C. This research introduces a straightforward and controllable method for tailoring interfacial electronic structures, offering valuable insights for the rational design of highly efficient catalysts for low-temperature WGS. Download: Download high-res image (237KB) Download: Download full-size image
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ELECTROCHIMICA ACTA
·
2025
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IF 5.6
Lei Tian,Yuhao Zhang,Luting Yan,Qi Guo,Zekun Ren,Chao Wang,Falan Li,Qingqing Yang,Xia Sun,Yemin Guo,Yanyan Zhang
In this paper, a dual-potential-resolved label-free signal transduction electrochemiluminescence (ECL) biosensor based on hydrogen peroxide system was constructed by using CeO 2 -Au to modify the electrode, and selecting CdS QDs and DPEA-AuNCs as independent cathodic and anodic ECL light sources. CeO 2 -Au improves the conductivity and interfacial environment of the working electrode, immobilizes the DNA strand of the hairpin structure through Au-S bonding, and also catalyzes the generation of a large amount of superoxide anion from hydrogen peroxide. In order to achieve specific detection, CdS QDs and DPEA-AuNCs were selected to modify the aptamers, respectively, and two targeted functional probes were designed to recognize Staphylococcus aureus and Vibrio parahaemolyticus , respectively, and to detect these two food-borne pathogens simultaneously by two-potential discrimination. After a series of tests and validations, the sensor exhibited good selectivity and sensitivity, showcasing its significant potential in the realm of food safety detection and offering an effective method for the concurrent detection of various pathogenic bacteria in food.
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高影响因子
MOLECULES
·
2025
·Vol. 30
·期 11
·2301
·
IF 4.6
Wenying Wu,Wenhao Yao,Yitong Liu,Senliang Xi,Teng Zhang
Ammonia is a promising hydrogen storage material because it is easy to store and decompose into COX-free hydrogen. A Ru-based catalyst exhibits good catalytic performance in ammonia decomposition, and enhancing the interaction between the Ru atoms and the support is an important way to further improve its catalytic activity. In this study, CeO2was prepared by calcination using a cerium-based metal–organic framework (MOF) as the precursor, and the number of oxygen vacancies on the surface of CeO2was regulated by hydrogen reduction. The XPS and Raman results showed that abundant oxygen vacancies were formed on the surface of these CeO2, and their number increased with an increase in the reduction time. The Ru/CeO2-4 h catalyst, using CeO2reduced for 4 h as the support, exhibited good catalytic activity in ammonia decomposition, reaching 98.9% ammonia conversion and 39.74 mmol gcat−1min−1hydrogen yield under the condition of GHSV = 36,000 mL gcat−1h−1at 500 °C. The XAFS results demonstrated that Ru was stably anchored with oxygen vacancies on the surface of CeO2via Ru-O-Ce bonds. Density functional theory calculations further showed that these bondings lower the reaction energy barrier for N-H bond cleavage, thereby significantly enhancing the catalytic activity.
研究领域:
材料科学
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化学工程
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能源技术
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PubMed
高影响因子
RSC Advances
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2025
·Vol. 15
·期 13
·9997
·
IF 4.6
Zhendong Fu,Jiahe Qiu,Ping Gong,Danhong Zhang,Liping Wang
The precise and sensitive quantification of total antioxidant capacity (TAC) is indispensable for evaluating the quality of foods rich in antioxidants. In this investigation, a novel nanozyme exhibiting robust oxidase activity was synthesized via a sonochemical doping process utilizing copper ions and the modification of 2-propylimidazole onto nanoceria. Subsequently, a CeO2@Cu-PrIm/ox-TMB assay system was successfully formulated, furnishing a practical and highly sensitive analytical tool for TAC determination. The colorimetric sensor exhibited a linear response over a concentration range of 1 μM to 70 μM, accompanied by a limit of detection (LOD) of 1.26 μM under meticulously screened conditions. This assay displayed substantial practical utility for TAC analysis in fruits, attributed to its exceptional accuracy and selectivity. This research endeavor may offer a novel direction for the design of nanozymes and colorimetric biosensors possessing heightened oxidase activity, thereby advancing the field of analytical chemistry and food science. Schematic depicting the reaction system of CeO2@Cu-PrIm/ox-TMB assay for the determination of TAC.
研究领域:
分析化学
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食品科学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Zijian Wang,Yajing Chen,Jishun Guo,Dongzhi Zhang,Mingcong Tang,Yuehang Sun,Xingyan Shao
Hydrogen (H 2 ) is one of the most critical gases in transformer oil. In this paper, an H 2 sensor based on spindle-shaped multilateral CeO 2 rods in micron size and TiO 2 quantum dots (QDs) with an average size of 3.09 nm was designed. The sensor based on CeO 2 with 1 wt%TiO 2 has the best performance and is labeled as Ce–Ti1 sensor. The Ce–Ti1 sensor operates at 250 °C and has the better response value of 52.51% to H 2 of 1000 ppm. The response time is less than 1 s for 2000 ppm H 2 and the response time is 1 s. The Ce–Ti1 sensor has low response values for several dissolved gases in transformer oils (5.78 times than 1000 ppm C 2 H 6 , 9.28 times than 50 ppm CO, and 18.04 times than 1000 ppm CH 4 ). The response of the Ce–Ti1 sensor is affected by humidity, while it shows good long-term stability and repeatability. The response intensity can decrease by 50.21% in RH = 85% compared with sensing performance in RH = 33%. First-principle calculations are used to analyze the H 2 -sensing properties of TiO 2 , CeO 2 , and their composite heterostructures from a microscopic perspective. The adsorption mechanism between the Ce–Ti1 heterojunction and H 2 molecules is analyzed by the adsorbed oxygen mechanism. The construction of DFT calculations and H 2 -sensitive mechanism models can provide guidance for the subsequent construction of high-performance CeO 2 -based gas sensors.
研究领域:
材料科学
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化学
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高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2025
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IF 6.1
Zhuo Wei,Huaqiang He,Yiyi Lin,Tian C. Zhang,Shaojun Yuan
To effectively prevent the diffusion of corrosive ions from the external aqueous environment to the coating, as well as the permeation of ions from the coating into the underlying metal substrate, this study employed a simple spray coating method to construct a diatomite-based bilayer composite coating (referred to as OCDPD) on an AZ31B magnesium (Mg) alloy substrate. This OCDPD coating consisted of a bottom conductive polymer layer, which is a poly(3,4-ethylenedioxythiophene)-loaded diatomite/epoxy resin coating (PD), and a superhydrophobic top layer, which is an octadecyltrimethoxysilane modified CeO 2 @diatomite/epoxy resin coating (OCD). The as-prepared bilayer composite coating exhibited superior superhydrophobicity and self-cleaning capabilities, achieving a corrosion inhibition efficiency of 99.11 % after 168 h of immersion in a 3.5 wt% NaCl solution. Additionally, the OCDPD coating exhibited higher stability in salt spray tests compared to both single-layer coatings (OCD and PD). This study not only demonstrates the exceptional efficacy of the innovative composite coating in protecting Mg alloys from corrosion, but also provides a novel perspective on integrating conductive polymer coatings with superhydrophobic coatings as a comprehensive strategy for corrosion protection .
研究领域:
材料科学
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表面工程
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腐蚀与防护
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高分子材料
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纳米复合材料
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高影响因子
Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 38
·32416-32426
·
IF 9.5
Runcheng Zhang,Zhuolin Yuan,Xutao Qiu,Zhiyan Rui,Xiaoyun Shi,Jia Li,Aidong Tan,Jianguo Liu
Proton exchange membrane (PEM) water electrolysis efficiency can be significantly enhanced by reducing the membrane thickness; however, this approach leads to excessive H2 permeation into O2 (HiO), causing serious safety hazards and accelerated degradation. This study presents a novel thin (about 60 μm) composite membrane incorporating Pt and CeO2 nanoparticles supported on carbon nanotubes (Pt-CeO2-CNT/Nafion) to address these challenges. The catalysts embedded in the membrane exhibit synergistic multifunctional effects at the microscopic level. CeO2 transfers electrons to Pt through metal–support interactions, enhancing the H2–O2 recombination activity. Oxygen vacancies in CeO2 effectively scavenge free radicals (H˙, HO2˙, HO˙, etc.). CNTs serve as stable anchoring sites, preventing Ceδ+ migration and membrane poisoning. At the macroscopic level, Pt-CeO2-CNT/Nafion maintains superior electrochemical performance with an electrolysis voltage of 1.746 V at 3.0 A cm−2. Meanwhile, the HiO concentration remains below 0.7% across all tested current densities, and the F− release rate decreases by 3.8-fold compared to Pt-CNT/Nafion during long-term operation, indicating improved safety and durability. This work provides both fundamental insights and practical strategies for developing next-generation thin PEMs suitable for industrial applications.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Jiahao Liu,Xiaojie Jin,Xi Lu,Xinyu Huang,Hongyan Chen,Long Qiu,Xiaowei Huang,Yongxiu Li,Jing Li
The application of rare earth micro-nano materials requires first formulating them into slurries with high dispersion stability, including polishing powders, catalysts, phosphors, ceramics, and other materials. To achieve this, it is essential not only to prepare monodisperse micro-nano particles but also incorporate appropriate dispersants to prevent particle aggregation. For this purpose, the study designed and synthesized a core-shell structured Gd 3 + -doped CeO 2 -coated SiO 2 composite abrasive: SiO 2 /CeO 2 :Gd. Low-field nuclear magnetic resonance technique was employed to investigate the sedimentation behavior of polishing slurries and explore the mechanism by which different dispersants enhance slurry dispersion stability, achieving real-time nuclear magnetic resonance imaging tracking of the sedimentation process. Results show that: The strong paramagnetic properties of Gd 3+ significantly enhance the relaxation efficiency of water molecules within the particle surface region, thereby serving as a sensitive probe for characterizing the liquid environment at the particle surface. Based on the T 2 distributions, settling can be divided into three stages: homogenization, sedimentation, and agglomeration. In polishing slurries, water molecules primarily exist in three forms: bulk water (P1), hydration layer water (P4) and surface-bound water (P5), attributing to different peaks of T 2 relaxation times. However, only one T 2 peak (P2) was observed for the homogenization slurry due to the rapid exchange among the three kind of water molecules. With the sedimentation proceeding, P2 transforms into two peaks of P1 and P3. The rate of change in the peak areas of P1 and P2 can reflect the sedimentation rate of the slurry. In the agglomeration stage, the overlapping of hydration layers forms interstitial water, leading to an increase in its T 2 relaxation time. Therefore, the P3 can further split into two peaks of P4 and P5, corresponding to interstitial water and surface-bound water in the sediment layer.
研究领域:
材料科学
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核磁共振（NMR）
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化学机械抛光（CMP）
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胶体与界面科学
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纳米技术
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Jinxu Zhang,Fusheng Yang,Tao Fang,Bin Wang,Qingyuan Yang,Zhen Wu,Zaoxiao Zhang
The N-ethylcarbazole/dodecahydro-N-ethylcarbazole system, which offers advantages such as excellent hydrogen storage capacity, good reversibility, and reliable safety, is recognized as a potential candidate for hydrogen storage. However, the inefficient dehydrogenation by existing catalysts limits the commercial application of the system. In this work, CTAB was used as the soft template to increase the specific surface area of CeO 2 supports, and further the active metals were formed upon them through various reduction methods. A series of Pd/CeO 2 catalysts were thus prepared, among which Pd/CeO 2 –C6 adopted a composite strategy of using CTAB as the template to increase the specific surface area of CeO 2 and enhancing the dispersion of Pd through ultrasound assisted reduction, showed the best catalytic dehydrogenation performance for 12H-NEC. After 7 h of reaction at 453 K, the conversion rate of 12H-NEC reached 100 % with 97.24 % of hydrogen released. Combining BET, HRTEM, XPS, CO-pulse chemisorption and other characterization analyses, it was found that the incorporation of CTAB effectively enhanced both the specific surface area and oxygen vacancy concentration of CeO 2 , while ultrasound assisted reduction enabled a small particle size and good dispersion of metal Pd on the support. The strong synergetic effects of support and active metal in Pd/CeO 2 –C6 catalyst largely accounts for its good catalytic performance. This work offers valuable insights and guidance for the development of efficient dehydrogenation catalysts for 12H-NEC.
研究领域:
催化化学
·
材料科学
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Decai Yang,Qing Ye,Chao Qu,Fanwei Meng,Lanyang Wang,Yongqi Li
In the quest to enhance photocatalytic performance, structural regulation and interface engineering stand out as effective strategies for amplifying active sites and fostering the separation of photogenerated electron-hole pairs. In this study, a pioneering approach was employed, utilizing a straightforward two-step calcination method to prepare a novel photocatalyst : porous graphite carbon nitride (g-C 3 N 4 , CN) nanosheets (NS) loaded with mesoporous cerium oxide (CeO 2 /CNNS). The distinctive architecture of CeO 2 /CNNS not only elevates the specific surface area and catalytic active sites but also facilitates efficient mass transfer. Experimental results and density functional theory (DFT) calculations corroborate the existence of an internal electric field (IEF) within the Z-scheme heterojunction formed by uniformly dispersed CeO 2 and CNNS. This IEF proves pivotal in promoting charge separation and migration, thereby maintaining robust redox capabilities. Under visible light irradiation, CeO 2 /CNNS demonstrates an impressive 4.2-fold increase in the hydrogen production rate compared to bulk g-C 3 N 4 (BCN), coupled with a 48.5% boost in the photocatalytic degradation rate constant (k) of tetracycline (TC). This study not only unveils the innovative design of CeO 2 /CNNS but also paves the way for a fresh perspective on the design and preparation of multifunctional photocatalysts.
研究领域:
材料科学
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环境科学
·
化学工程
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yunshuo Zhu,Lili Guan,Xiwen Song,Yarong Huang,Ming Li,Qingxian Zhang,Ruihua Guo
Strict control of carbon emissions is crucial for expediting the achievement of carbon neutrality. However, the current CO 2 RR electrocatalytic exhibits numerous shortcomings that impede the enhancement of catalytic activity. Issues such as lengthy catalyst preparation times, and high levels of precious metal content. Additionally, the aggregation of ultrafine nanoparticles contributes to a rapid deterioration in catalytic performance. Herein, a Joule-heating method is efficiently utilized to synthesize heterostructures nano-catalysts for CO 2 electroreduction on carbon cloth substrates. This method takes advantage of the thermoelectric coupling of the carbon cloth to achieve carbothermal reduction, while also regulating phase composition and introduction of oxygen vacancies. The Cu-CeO 2 /TiO 2 /CC catalyst synthesized in this method showed a current density in CO 2 of −32 mA·cm −2 at −1.0 V (vs. RHE). Notably, this catalyst demonstrated high CO selectivity and Faraday efficiency (FE CO ) of up to 82.5 % at a low potential of −0.3 V (vs. RHE). Optimal electrochemical performance is achieved at a power of 40 W. The ultra-fast temperature change process prevented the agglomeration of catalyst particles and facilitated the construction of a stable heterogeneous interface with a high oxygen vacancy concentration. In conclusion, this study presents a promising approach, particularly for the rapid preparation of low-cost, highly selective non-precious metal electrocatalysts.
研究领域:
材料科学
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环境科学
·
电化学
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高影响因子
危险品化学品经营许可证（带存储）