INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Shan Li,Huixia Li,Taotao Huang,Xuebo Chen
The development of efficient Cu–Ce catalysts for selective CO oxidation in hydrogen streams (CO-PROX) remains a critical challenge for hydrogen purification technologies. Herein, we report an acid-modified Cu–Ce/γ-Al2O3 catalyst synthesized through HCl-assisted wet impregnation and thermal aging, demonstrating exceptional low-temperature CO-PROX performance. The optimized CuCe0.8(Cl)0.2/γ-Al2O3 catalyst achieves superior CO conversion below 160 °C and maintains stable activity for 50 h at 160 °C. Mechanistic studies reveal that HCl modification induces dual enhancement effects: (1) increased Cu+ species density enhances CO adsorption capacity; (2) elevated Ce3+ concentration promotes oxygen vacancy formation for efficient O2 activation. Complementary characterization demonstrates that the acid treatment optimizes the active species dispersion and creates hierarchical pore structures in the γ-Al2O3 support, which facilitates reactant accessibility and stabilizes catalytic intermediates. The reaction mechanism involves synergistic cooperation between Cu+-mediated CO adsorption, oxygen vacancy-assisted O2 activation, and hydroxyl-assisted bicarbonate intermediate formation on the alumina support. This work establishes an effective acid-modification strategy for designing durable CO-PROX catalysts, advancing the development of a practical hydrogen purification system.
研究领域:
催化化学
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材料科学
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环境科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yuhong Zhang,Yanchang Liu,Junlong Liu,Zhihao Qu,Siye Tian,Hang Liu
Here, Ce-doped ZnO flower-like nanosheets are prepared by one-step hydrothermal method . The sensor based on Ce–ZnO composite exhibits excellent gas-sensing properties to acetone. Compared with pure ZnO, the response of Ce–ZnO composite is increased by 5.5 times, and the optimum operating temperature is reduced by 60 °C. The gas-sensing properties of the sensor to acetone under different humidity conditions are investigated. The redox reaction of Ce element increases the anti-humidity of Ce–ZnO sensor. Finally, the gas sensing mechanism of Ce–ZnO nanomaterial and anti-humidity principle are discussed in detail. The result can provide a new material for develop high sensitivity acetone sensor and a new anti-humidity strategy for designing gas sensing materials.
研究领域:
材料科学
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2024
·
IF 8.2
Huimin Yang,Zhenming Du,Yazhou Yang,Qirui Wu,Chaofan Ma,Huiyu Su,Xiaoxia Wang,Dawen Zeng
Developing gas sensors capable of efficiently detecting harmful gases is urgent to protect the human environment. Here, an active Ce–Ag bimetallic pair was innovatively introduced into SnS2, which successfully exhibited excellent NO2 gas sensing performance. 0.8% Ce–SnS2–Ag showed a gas sensing response of 5.18 to 1 ppm of NO2 at a low temperature of 80 °C, with a lower limit of detection as low as 100 ppb. DFT calculations revealed that Ce atoms are substituted into the main lattice of SnS2, which opens up the interlayer spacing and serves as an anchor point to fix the Ag atoms in the interlayer. The Ce–Ag bimetallic pairs successfully modulate the electronic structure of SnS2, which promotes the adsorption and charge transfer between NO2 and Ce–SnS2–Ag and thus achieves such an outstanding gas sensing performance. This work opens an avenue for the rational functional modification of SnS2 with an optimized electronic structure and enhanced gas sensing.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Rui Zhao,Huimin Ren,Yubing Si,Gang Li,Yongzhu Fu
Phenyl tetrasulfide (PTS) is a high-capacity cathode material for lithium batteries. However, it also suffers the shuttle effect of polysulfides to the lithium anode in the charge because some lithium polysulfides are still formed due to the middle sulfur atoms in the structure of PTS. The separator modification is considered as a convenient and effective strategy to reduce the shuttle effect. In this report, metal-organic framework (MOF)-801(Ce) is synthesized and coated on a polypropylene separator (MOF-801(Ce)−PP) as a polysulfide barrier. MOF-801(Ce) has a pore size of 6 Å, which is smaller than the sizes of lithium thiophenolate and lithium polysulfides. Therefore, the MOF-801(Ce)−PP can effectively inhibit the migration of active species to the lithium metal anode without affecting the passage of lithium ions. Consequently, the Li/PTS cell with the MOF-801(Ce)−PP exhibits a discharge capacity of 340.8 mAh g −1 at 0.5 C after 250 cycles, which is better than the control cell. Even when the PTS areal mass loading is 5.4 mg cm −2 , the cell with the MOF-801(Ce)−PP can still deliver a high specific capacity of 430 mAh g −1 at 0.5 C rate. This study proves a feasible strategy to overcome the polysulfide shuttle issue of organosulfide cathode materials.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2024
·Vol. 221
·期 12
·2300874
·
IF 1.9
Jie Yang,Zhengkun Cai,Dong Li
In this experiment, ZSM-5 molecular sieves are prepared by hydrothermal synthesis and modified by impregnation with Fe, La, and Ce loading. X-ray diffraction, X-ray photon-electron spectroscopy, and scanning electron microscopy show that Fe, La, and Ce elements are successfully loaded onto the surface of the material, and the surface area of Fe-La-Ce-ZSM-5 is 241.66 m 2 g −1 . A systematic study on the adsorption of Congo red solution is carried out using Fe-La-Ce-ZSM-5 molecular sieves and it is found through the adsorption data that the adsorption process is more in line with Langmuir and the proposed second-order kinetic model, and the theoretical saturated adsorption capacity is 2669.19 mg g −1 . The adsorption process is recycled four times and still has more than 60 % removal performance for high-concentration Congo red solution. The results of this experiment show that Fe-La-Ce-ZSM-5 molecular sieves show excellent removal performance for Congo red dye in wastewater.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Qikai Ren,Shuaishuai Wang,Haoyu Liu,Xing Zhang,Yanran Cui,Gui-Rong Zhang,Lei Nie,Donghai Mei
The dry reforming of methane (DRM) serves as a pivotal reaction for hydrogen generation and the simultaneous conversion of methane and carbon dioxide, two major greenhouse gases, into syngas that can further be converted into high-value fuels and chemicals. However, catalyst deactivation imposes a major challenge that prohibits the market penetration of DRM. Here we reported a series of bifunctional Ni-Ce catalysts supported on SSZ-13 (Ni-Ce-SSZ-13) and discovered that a small amount of Ce could significantly enhance the activity, selectivity, and stability for DRM. Optimal ratio of Ni to Ce has been identified to yield peak catalytic performance. The optimal performance is correlated with the maximum Ce 3+ /Ce 4+ ratio as revealed by XPS analysis, which implies an increased presence of oxygen vacancies in the catalysts. It played a crucial role in facilitating the oxidation of activated CH 4 species at Ni sites, thereby enhancing DRM activity and diminishing the detrimental coke formation. It is also disclosed that integrating proper amount of Ce fosters its interactions with Ni, effectively preventing the agglomeration of Ni sites. This work presents great implications for the rational design and catalytic synergy of bi-/multi-functional zeolite catalysts for other technological applications.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2024
·
IF 3.9
Jingwei Yuan,Wanyin Xu,Yirong Wang,Shao Wang,Ronghui Hao,Yubing Dong,Qianqian Li,Yufeng Zhao
Metal-organic frameworks (MOFs), characterized with highly ordered porous structures and relatively high surface area, exhibit significant application potential in the field of electrochemistry catalysis. In this study, we successfully prepared UiO-66(Ce) particles with uniform nanocube morphology and the size distribution ranging from 90 to 156 nm. Both morphology and size can be precisely tuned by directly adjusting detailed synthesis parameters, including solvent concentration and reaction time. Moreover, the crystal growth mechanism of UiO-66(Ce) was comprehensively investigated through the microstructure characterization. Such uniform particles demonstrated a desirable electrocatalytic performance with hydrogen evolution reaction (HER) overpotential of 118.6 mV (at 10 mA cm −2 ) in alkaline electrolyte (1 M KOH). This study not only introduces a novel approach for the morphological manipulation of UiO-66(Ce), but also presents new material candidates for the advancement of high-performance electrochemical energy conversion systems.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Jun Yuan,Bo-Yuan Wang,Yi-Chao Zong,Fu-Qing Zhang
Fabricating efficient and stable photocatalysts with an improved photocatalytic property is necessary to decontaminate wastewater. Herein, the Ce-MOF@h-CeO 2 microspheres with a hollow structure are designed and synthesized. The unique hollow structure with the π-π conjugate organic ligand offers abundant reactive sites and a charge transfer channel, both enhancing the performance of photocatalysts. The SEM and TEM tests showed that the Ce-MOF@h-CeO 2 composite retains the hollow microsphere structure, and its diameter is about 600–900 nm. At the same time, the prepared composite showed excellent photocatalytic performance for the degradation of rhodamine B (RhB) under visible-light-driven, within 30 min dark adsorption and 150 min visible light, the degradation rate for RhB reached 95.5% of Ce-MOF/h-CeO 2 -2 composite, which were 7.17 and 4.46 times of h-CeO 2 and Ce-MOF, respectively. Furthermore, the composite of Ce-MOF@h-CeO 2 -2 exhibited a remarkable photocatalytic hydrogen evolution efficiency (3419.38 μmol‧g −1 ‧h −1 ), which was 15.16 and 10.91 times greater than that of the pure samples. This study provides helpful results of the metal–organic framework that can sensitize effectively the inorganic semiconductor materials for improving photocatalytic performance.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2021
·Vol. 413
·期 8
·2135-2146
·
IF 4.157
Mei He,Ma Yange,Wu Huimin,Wang Xuedong
Herein, we synthesized and characterized glutathione-capped copper nanoclusters (CuNCs) using a convenient one-pot chemical reduction approach based on glutathione as capping and reducing agents. The Ce(III) induced aggregation-induced emission of CuNCs to form a CuNCs-Ce 3+ fluoroprobe due to electrostatic and coordination interactions between Ce 3+ and CuNCs. In contrast to CuNCs, the fluorescent intensities (FLs) of CuNCs-Ce 3+ were enhanced by ~ 40-fold concomitant with 20-nm blue-shift of the maximum emission, and a 3.45-fold lengthening of the average fluorescent lifetime. The FLs of CuNCs-Ce 3+ were selectively quenched at 650 nm by hydrogen peroxide (H 2 O 2 ) via the redox reaction. Based on this phenomenon, the sensitive assay of H 2 O 2 was realized, and the linear range spanned over the range of 14–140 μM. Notably, the visualization of the fluorescence quenched effect of H 2 O 2 could be easily attained. Additionally, glucose could be specifically oxidized by glucose oxidase to produce H 2 O 2 , and thus the detection of glucose was achieved according to changes in the concentrations of H 2 O 2 . Under optimized conditions, the fluorescent assay of glucose based on the CuNCs-Ce 3+ system offered the linear range of 8–48 μM with detection limit of 2.4 μM. Meanwhile, high selectivity of the as-constructed fluorescent assay allows the sensitive detection of H 2 O 2 and glucose in real-world care products and human serum samples, showing a great application potential in their conventional monitoring.
研究领域:
分析化学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Functional Materials Letters
·
2023
·
IF 1.3
Meiqi Zhai,Yajie Bai,Xia Li,Fengfeng Wang,Wei-Qiang Fan,Hongye Bai
Photoelectrochemical reduction of nitrate (PEC NRR) to ammonia (NH 3 ) is a promising means with water as hydrogen source under room temperature. The construction of photoelectrode with efficient light response and reaction kinetics is the core point to achieve high NH 3 yield efficiency. Herein, a cerium-based metal organic framework (Ce-MOF) was successfully decorated on the copper phthalocyanine (CuPc). The CuPc/Ce-MOF heterostructure exhibits the ideal nitrate catalytic reduction activity, and the NH 3 yield (−0.6 V versus RHE) increases to 1.58 μ g h − 1 cm − 2 from 0.67 μ g h − 1 cm − 2 (CuPc). Besides, the cycle experiments reveal that the CuPc/Ce-MOF heterostructure has maintained good catalytic stability. This work explores the PEC NRR process mechanism of CuPc/Ce-MOF samples and provides a new idea for green NH 3 production.
研究领域:
材料科学
·
电化学
·
光化学
·
催化
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Xuteng Zhao,Dejun Xu,Yinan Wang,Zuwei Zheng,Ke Li,Yiran Zhang,Reggie Zhan,He Lin
A novel catalytic system for benzene oxidation at low temperature is constructed by combining electric field with Pt-Ce-Zr nano-catalyst. The 1 wt% Pt/Ce 0.75 Zr 0.25 O 2 catalyst assisted by electric field shows the best catalytic performance with 90% benzene conversion at 96.5 °C and excellent water resistance. The effect of electric field on catalysts and catalytic process is comprehensively investigated. The results of XRD, TEM, XPS and H 2 -TPR reveal that the electric field show negligible influence on the crystal structure and surface morphology of the catalyst, but it can lead to more oxygen vacancies. Therefore, more adsorbed oxygen with higher activity will be produced on the catalyst surface. The redox performance is improved due to the fact that valence distribution of Pt is changed in forms of more active sites composed of high valence oxides (PtO) generated in electric field. In situ DRIFTS is used to investigate the oxidation process of benzene and the results prove that electric field could accelerate the production and consumption of intermediate products, and produce new intermediate products such as carboxylic acid species, indicating that the introduction of electric field may open up a new rapid reaction path and promote the activation of benzene at low temperature.
研究领域:
催化化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
FUEL
·
2022
·
IF 8.035
Caixia Zhu,Kaizhuang Xu,Yuan Fang,Qian Lv,Kun Jiang,Huibo Zhao,Yang Chen,Peng Wang,Hua Yang,Lizhi Wu,Yu Tang,Li Tan
The direct synthesis of ethanol from syngas is a promising way in the field of clean and efficient use of fossil fuel, but it still suffers from insufficient ethanol selectivity and understanding of active sites. In this work, the Rh-based catalyst with Ce as promoter and ZrO 2 as carrier exhibits excellent catalytic performance, showing the selectivity of ethanol toward 24.3 %. Moreover, the yield of methane decreases to 4.8 %, and the formation of CO 2 is inhibited to a certain degree by tuning the active sites. The carrier is changed by doping Ce into the ZrO 2 lattice, which assists to form the Rh δ+ active sites. The synergetic effect of Ce and Zr is important to influence the state of Rh species in the catalysts, leading to the differences in the CO hydrogenation process. On the other hand, the Rh δ+ active sites are also stabilized by promoted surface oxygen vacancies in the 2.0Rh5.0Ce-ZrO 2 catalyst. The high-activity catalyst with Rh δ+ active sites will be helpful to understand the real active sites of Rh-based catalysts for ethanol synthesis from syngas, thereby guiding further design of the related catalyst with high performance to meet the industrial demand in syngas converting to ethanol.
研究领域:
催化化学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）