ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Shanshan Shao,Xin Li,Xiaohua Li,Shiliang Wu
Developing efficient solid acid catalysts for converting biomass-derived carbonyls into high-energy-density aviation fuels remains challenging due to insufficient activity and stability. This work systematically investigates the mechanistic roles of Lewis and Brønsted acid sites in CeO2-based catalysts during the aldol condensation of cyclopentanone, revealing that Brønsted acid sites dominate self-condensation pathways, while Lewis acid sites govern cross-dimerization reactions. To optimize the strength and stability of the acid catalyst, a ZrO2–CeO2 composite (Ce–Zr–O) was developed via controlled metal oxide doping (33 wt % ZrO2), which achieves enhanced acid site distribution and synergy. When Ce–Zr–O-33 was supported on biomass-derived porous carbon (PC), the resulting Ce–Zr–O-33/PC catalyst demonstrated exceptional recyclability, with the target product yield increasing by 4.28% over five consecutive cycles. Further integration of bimetallic Ni–Cu (10 wt %) synergistically balanced condensation and hydrogenation functions, boosting the selectivity of alkanes to 73.68%. The optimized Ni–Cu (10)/Ce–Zr–O-33/PC catalytic system exhibits a dual-regulation mechanism: ZrO2 doping modulates the acid site density and strength, while Ni–Cu nanoparticles promote selective hydrogenation and stabilize intermediates. This work provides a scalable solid acid catalyst design framework for industrial biomass-to-fuel conversion, bridging the gap between mechanistic understanding and practical application in sustainable aviation fuel synthesis.
研究领域:
催化化学
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可再生能源
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可持续化学
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材料科学
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生物质转化
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多相催化
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燃料合成
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Junfang Ding,Changjin Xu,Xinyi Yao,Kunming Hou,Yinkang Yang,Dan He,Hao Chai,Xiaomin Sun,Shanghong Zeng
The development of ultrafine metal oxide nanoparticles anchored on reducible oxide supports with precisely engineered interfacial active sites has emerged as a critical frontier in heterogeneous catalysis. However, conventional synthesis strategies struggle to reconcile high loading with ultrafine dispersion, often leading to nanoparticle aggregation and compromised stability. Herein, we present a coordination chemistry-driven strategy integrating the hard–soft acid–base principle with a water-etching process to synthesize ultrafine CuOx nanoparticles anchored on CeO2. By exploiting the differential coordination affinities of Ce3+ and Cu2+ with carboxyl ligands in a bimetallic BTC precursor, selective segregation during solvothermal synthesis was achieved. Ce3+ formed a stable framework with carboxyl groups, while Cu2+ underwent a hydrolysis-induced migration to surface defect sites. Regulating the Cu2+/Ce3+ ratio enabled precise control over CuOx dispersion, interfacial Cu–O–Ce bonding, and local structure. The optimized catalyst exhibited a remarkable Cu loading of 21.94% with high dispersion, lattice distortion, and enhanced metal–support interactions. Notably, the designed catalyst demonstrated exceptional stability under H2-rich streams, which achieved a CO conversion enhancement from 67.4 to 77.7% over 40 h through the interfacial stabilization of metastable Cu+-Ov-Ce4+ active configurations. Advanced characterization and density functional theory (DFT) calculations revealed that the enhanced interfacial Cu–O–Ce interactions and unsaturated coordinated CuOx species facilitated electron transfer, oxygen activation, and CO adsorption, synergistically boosting the catalytic performance via the Mars–van Krevelen mechanism. This work establishes a rational coordination chemistry-guided paradigm for designing high-performance catalysts with precisely engineered active sites.
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DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Xiangling Wang,Zhimin Li,Zhengfu Zhang,Chengping Li,Rui Bao,Zhishan Li,Jinsong Wang
Elevating the lattice oxygen p -band center (ε p ) is critical to trigger the lattice oxygen mechanism (LOM) for boosting oxygen evolution reaction (OER) activity in advanced electrocatalysts, but it also causes a reduced d -band center (ε d ) due to the coupled metal-oxygen d - p orbital, resulting in a sluggish regeneration of lattice oxygen. Herein, we surmount this challenge by heterojunction and defect-engineering to raise both ε d and ε p of CeO 2 NPs/D-Ni(OH) 2 . The formative built-in electric field and defect reduce the electronic density of Ni(OH) 2 , effectually decreasing the deprotonation energy and promoting its surface reconstruction into γ-NiOOH, the formative high valence Ni δ+ raises ε p to trigger LOM. Meanwhile, the ε d is upshifted by the high f -band of CeO 2 , accelerating the adsorption of oxygenous species to replenish the lattice oxygen vacancies. Consequently, the CeO 2 NPs/D-Ni(OH) 2 demonstrates exceptional OER activity, requiring only 169 mV to reach 10 mA cm −2 , and maintains impressive stability over 300 h at 1000 mA cm −2 in 1 M KOH. This work presents a novel strategy to balance lattice oxygen participation and regeneration by rising d - p orbital for inducing and maintaining LOM activity.
研究领域:
电催化
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材料科学
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物理化学
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能源化学
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纳米材料
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产品关联
DOI
高影响因子
SOLID STATE IONICS
·
2021
·
IF 3.785
X.Y. Ping,B. Meng,W.K. Liang,Q. Zheng,C. Li
The Ce 0.85 Y 0.15 O 2-δ (YDC)-xmol% aluminum containing compound (x = 0, 10, 20 and 40) composite powders were prepared through mixing YDC with 0, 10, 20 and 40 mol% Al(NO 3 ) 3 (named as A0, A10, A20, A40), and then densified by spark plasma sintering at 1300 °C for 5 min. The main phase of YDC exists in all samples, while a second phase of CeAlO 3 forms for x ≥ 10 in the composite ceramics. The diffraction peak intensity of CeAlO 3 gradually augments with the increase of Al(NO 3 ) 3 addition amount. The average grain size of the composite ceramics reduces from 1.7 μm to 0.34 μm with the rise in Al(NO 3 ) 3 addition amount from 0 to 40%. The grain boundary (GB) electrical conductivity of A10 and A20 is lowered by 96% and 89% compared with that of YDC at 350 °C because the CeAlO 3 phase exists in the form of flakes and fine grains and hinders the oxygen ion conduction across the GB of samples. When CeAlO 3 grains grow up and uniformly distribute in the A40, the GB conductivity of A40 increases by 405% relative to that of pure YDC at 350 °C.
研究领域:
材料科学
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陶瓷
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固态离子学
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能源材料
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·Vol. 46
·期 6
·7510-7516
·
IF 3.45
Pan Tan,Yi Yang,Yudong Sui,Yehua Jiang
In this study, zirconia-toughened alumina (ZTA) samples with different amounts of CeO 2 were prepared by the spark plasma sintering method. The phase composition and microstructure of the samples were examined by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The addition of CeO 2 results in grain refinement and density increase; moreover, CeO 2 stabilises the high-temperature metastable phase . As the amount of CeO 2 reaches 7 wt%, a new CeAl 11 O 18 phase appears. The Vickers hardness , modulus, and fracture toughness of the samples depend to a large extent on the grain size, relative density, and existence of the second phase. Among the composites, that with 5 wt% CeO 2 shows the best performance with the highest values of relative density, Vickers hardness, and fracture toughness: 96.51%, 1688 HV, and 9.91 MPa.√m, respectively.
研究领域:
材料科学
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陶瓷
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机械工程
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
·
IF 4.7
Huitian Zhi,Lingwei Bu,Ruhui Shang,Xujie Wang,Yingchao Yang,Wanyu Zhang,Zhengquan Yan,Lei Hu
Food health and safety is one of the hottest topics to affect human life nowadays. To reliably detect toxic S 2− and to normalize bioactive ascorbic acid (AA), a kind of tiny CuO/CeO 2 modified bovine serum albumin (CuO/CeO 2 @BSA) was prepared under microwave-assisted conditions. Not only did the modification of BSA to CuO/CeO 2 nanospheres endow CuO/CeO 2 @BSA with high stability and an average mesoporous pore of 3.88 nm, it exhibited outstanding oxidase-like activity to catalyze the oxidization of 3,3′,5,5′-tetramethyl benzidine (TMB) with V max / K m of 0.15 mM/5.96 × 10 −8 M·s −1 . The presence of trace S 2− or AA could exclusively deteriorate the characteristic UV–vis absorbance intensity at 652 nm ( A 652 ) of CuO/CeO 2 @BSA-TMB with obvious hypochromic effect from dark blue to light blue. Under the optimal oxidase-mimic conditions, CuO/CeO 2 @BSA-TMB was applied for potable UV–vis spectral/smartphones-assisted red-green-blue (RGB) monitoring of S 2− or AA in complex agricultural products with detection limits as low as 9.2 × 10 −9 /4.0 × 10 −8 M or 6.1 × 10 −8 /7.2 × 10 −8 M. The analysis accuracy was reliable from comparing their F and t values and the detection mechanisms were proposed. It will shed a potential for portable monitoring of analytes in food samples practically.
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产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2026
·
IF 8.2
Zehua Wu,Gang Li,Yong Jia,Zhixin Zhang,Feng Wang,Yuqi Jin
Fused silica has played a crucial role as high quality transmission/reflection optical components in ultra-precision optical systems, such as high-power lasers, gravitational wave detection, laser gyroscope and ultraviolet lithography systems, which the surface frequency error is one of the main principal elements affecting the performance of fused silica component. For decades, the pursuit of atomic-level super-smooth surface of fused silica has never stopped. Herein, a kind of dual-size synergistic nano CeO 2 (DSS) was prepared, and the atomic-level super-smooth surface of fused silica with 0.055 nm roughness was achieved by chemical mechanical polishing through using DSS. Compared with the “a not-to-exceed line” of the National Ignition Facility, the surface of fused silica polished by DSS has a reduction of 26 times in the 0.4–8.33 mm −1 spatial frequency domain of the power spectral density curve. More importantly, DSS can efficaciously suppress surface frequency errors while enhancing polishing efficiency. Furthermore, the cause for mid-spatial frequency error on fused silica surface is investigated from a new perspective of the excessive chemical action in chemical mechanical polishing. What’s more, Ce-O-Si bonds at the SiO 2 -CeO 2 interface are characterized, and Ce single atoms in polished fused silica are detected for the first time.
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DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2026
·
IF 4
Runze Dong,Dakuo Liu,Pengfei Qu,Wenhao Li,Dong Fu
This study proposes a novel approach for synergistically degrading sulfur hexafluoride (SF 6 ) using dielectric barrier discharge (DBD) combined with TiO₂/CeO₂ photocatalysis. By introducing UV-responsive TiO₂, the photocatalytic activity of the catalyst was significantly enhanced, thereby improving the overall degradation performance for SF 6 . Under the conditions of a Ti/Ce molar ratio of 0.05:0.95 and an input power of 60 W, a degradation efficiency (DRE) of 99.99% was achieved when degrading 2% SF₆. Compared with pure CeO 2 (with a DRE of 92.44%), the DRE has increased by 7.55%, and the selectivity of SO 2 in the product has also significantly improved, indicating that the doping of TiO 2 promotes the more complete degradation of SF 6 . Compared to using DBD alone, the DRE increased by 4.7 times, and the energy yield (EY) increased by 12.78 g/kWh. Density functional theory (DFT) calculations indicate that the TiO₂/CeO₂ composite catalyst enhances the surface adsorption capacity for SF 6 molecules. Mechanistic analysis further revealed that the UV light generated by DBD excites TiO₂/CeO₂ to produce photogenerated electron-hole pairs, while the high-energy electrons in the plasma region effectively suppress carrier recombination. This study confirms the significant potential of the DBD-photocatalysis synergistic system for treating highly stable SF 6 .
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DOI
高影响因子
Catalysis Science & Technology
·
2026
·
IF 4
Yuzhen Hu,Ruiying Xiong,Xin Qu,Taras Nagornyy,Zhenlong Song,Xingye Zeng,Ning Li,Qi Zhang,Longlong Ma
Selective C-C bond cleavage in lignin is a pivotal step toward its efficient utilization, enabling the production of diverse and valuable chemicals from this abundant and renewable resource. Among the catalysts reported for oxidative cleavage of C-C bond in lignin β-O-4 ketones, CeO₂-supported Pd catalysts have demonstrated outstanding activity. However, the exact nature of the active Pd sites responsible for C-C bond cleavage remains poorly understood, limiting mechanistic insights into this transformation. In this study, CeO₂ supports with four distinct morphologies including rods (R), spheres (S), cubes (C), and polyhedrons (P) were synthesized to investigate their influence on the catalytic activity of Pd/CeO₂ catalysts in the oxidative cleavage of β-O-4 ketones. The catalytic performance was found to depend strongly on the morphology of CeO₂, with Pd/CeO₂-P exhibiting the highest activity for C-C bond cleavage. This catalyst possessed the lowest Pd⁴⁺ content and the highest Pd⁰/Pd²⁺ ratio among the series. By systematically tuning this ratio, a volcano-type relationship between Pd⁰/Pd²⁺ ratio and catalytic activity was established, indicating a dual-site mechanism in which Pd⁰ facilitates the formation of reactive oxygen species, while Pd²⁺ serves as the active center for C-C bond cleavage.
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·Vol. 13
·期 6
·120289
·
IF 7.2
Tiantian Zhang,Weilu Sun,Jiazhuang Chen,Jianxin Chen,Yinhui Li
The misuse of tetracycline (TC) harms ecosystems and human health. CeO 2 , with its stable structure and abundant oxygen vacancies (OVs), is a focus for TC photocatalytic degradation but suffers from high carrier recombination, poor visible light absorption, and nanoparticle agglomeration. In this study, to overcome the drawbacks of CeO 2 mentioned above, PVP-modified SrTiO 3 (STO) was used as the support, PVP efficiently captures the precursor Ce 3 + by taking advantage of its network structure. And a layer of ultrafine nanoparticles CeO 2 was uniformly loaded on its surface by hydrothermal synthesis to form a core-shell structure composite material CeO 2 @STO, effectively solving the problem of CeO 2 nanoparticle agglomeration. A large specific surface area and sufficient active sites have been obtained, which enables CeO 2 to fully exert its catalytic degradation ability. The TC removal rate of the composite material CeO 2 @STO-2 was 80.50 %, which was 1.5 times and 2.5 times that of CeO 2 and STO respectively, and still maintained a high TC removal rate after 5 cycles, with only a decrease of 10.03 %. Furthermore, for tetracycline antibiotics such as chloramphenicol (CTC) and oxytetracycline (OTC), the removal rates were as high as 85.60 % and 78.60 %, which were significantly higher than those of CeO 2 and STO. The enhanced catalytic performance is attributed to the broadened visible-light absorption of composites, a Z-scheme heterostructure that suppresses carrier recombination, and interfacial doping that enriches oxygen vacancies. Toxicity simulations and bean sprout experiments confirmed significantly reduced toxicity after degradation. This work provides a novel strategy for developing high-performance OV-rich core-shell photocatalysts.
研究领域:
材料科学
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环境催化
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光催化
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纳米材料
·
水处理
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产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2025
·
IF 3.7
Zhixian Wang,Yuntao Hu,Zhigang Zhang,Bin Wang,Gengxiu Zheng,Huaiqing Zhao
The development of synthetic methods for N-heterocyclic compounds have garnered considerable attention due to their significance in diverse chemical processes. Among various synthesis methods, the direct oxidative dehydrogenation of saturated substances to N-heteroaromatics is a simple and efficient method. This study utilized the pyrolysis of Mn/Ce-BTC MOFs precursor to prepare MnO X -CeO 2 composites as a heterogeneous catalyst for the aerobic oxidative dehydrogenation of N-heterocycles. The MnO X -CeO 2 composites were analyzed with various characterization techniques including XRD, SEM, TEM, BET, XPS, ICP-OES and Raman spectroscopy. The detailed findings from experiments indicate that the catalytic activity of the composites has been significantly improved due to the synergistic effect of MnO X -CeO 2 and the abundant oxygen vacancies on the surface of the catalyst. And the related mechanism experiments reveal that reactive oxygen species (ROS) are involved in this catalytic system. Furthermore, MnO X -CeO 2 composites retain excellent catalytic performance even after ten recycles. Graphical The synthesized bimetallic oxides MnO X -CeO 2 by the pyrolysis of Mn/Ce-BTC MOFs have been employed as a heterogenous catalyst for the oxidative dehydrogenation of N-heterocycles to N-heteroaromatics with oxygen as the solo oxidant.
研究领域:
催化化学
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材料化学
·
有机合成
·
无机化学
·
环境化学
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DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2016
·
IF 4.917
Jing Yang,Liang Zhao,Chunze Liu,Yuanyuan Wang,Liyi Dai
Efficient catalytic ethanolysis and gasification of kraft lignin were conducted over a versatile supported catalyst Rh/La 2 O 3 /CeO 2 –ZrO 2 to give high-value aromatic alcohols and H 2 -rich gas. The removal of phenolic hydroxyl group was the most prevalent reaction, and importantly, almost no phenols, undesired char and saturating the aromatic ring were detected. Meanwhile, the feedstock and solvent both played key roles in H 2 generation that contributed to the hydrodeoxygenation of liquid components and made the whole catalytic process out of H 2 supply. Reusability tests of catalyst indicated that the crystalline phase transition and agglomeration of support, the loss of noble metal Rh and carbon deposition were the possible reasons for its deactivation in supercritical ethanol. Comparing with water, methanol and isopropanol system, ethanol was the only effective solvent for the depolymerization process.
研究领域:
化学工程
·
能源科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）