JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2024
·
IF 5.8
Kuan Ding,Junheng Zhang,Zhihan Wu,Wangliang Li,Yuming Zhang,Shu Zhang
Catalytic ketonization of biomass is an effective approach for the deoxygenation of bio-oil and the enrichment of high-purity ketone products. However, the bio-oil contains a large amount of furanic components with oxygenated side groups (e.g., furfural, furfuralcohol, etc.), which severely hinders the efficiency of the ketonization reaction. In response to this challenge, this study employed Pd-based catalysts for selective conversion of furfural into "keto-friendly" components, thereby mitigating their inhibitory effects. Initially, three morphologies of CeO 2 (the main catalyst for ketonization) were selected to investigate their influence on furfural conversion. It was found that the products were mainly furfural (exceeding 86 %), with only up to approximately 13 % of "keto-friendly" products (mainly furans) detected, indicating that pure CeO 2 exhibits a weak catalytic effect on the effective conversion of furfural. Compared with pure CeO 2 , the yield of "keto-friendly" products increased significantly when 1 wt% Pd was loaded, demonstrating the excellent catalytic performance of Pd in the effective conversion of furfural. Co-doping of Pd and Zr (5 wt%) on CeO 2 further increased the "keto-friendly" products to 66 %, suggesting a synergistic effect of Pd and Zr. Mechanism analysis revealed that Pd promotes the formation of furans and benzenes by enhancing the decarbonylation of furfural and subsequent furan ring opening reactions, while the competing carbonyl hydrogenation pathway is weakened. The findings of this study will be beneficial for enhancing the biomass ketonization conversion, thereby providing valuable references for the high-value utilization of biomass.
研究领域:
能源化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ChemPlusChem
·
2015
·Vol. 80
·期 5
·886-894
·
IF 3.026
Hongxiao Yang,Yue Pan,Yucong Xu,Yanzhao Yang,Guoxin Sun
Graphical Stuck in the middle : A series of copper-modified ceria catalysts has been synthesized in a facile way. (CuO) x /Ce 0.9 Cu 0.1 O 2 showed excellent catalytic activity in CO low-temperature oxidation. The combined contribution of the synergistic effect and surface defects facilitates the CO oxidation at the interface between ceria and copper species (see scheme). Copper-modified ceria catalysts, (CuO) x /Ce 0.9 Cu 0.1 O 2 nanospheres, for low-temperature CO oxidation were fabricated simply by using the hydrothermal synthesis of Cu-doped CeO 2 (Ce 0.9 Cu 0.1 O 2 ) nanospheres followed by deposition of CuO over Ce 0.9 Cu 0.1 O 2 . The X-ray diffraction and electron spectroscopy characterizations demonstrated that the as-prepared nanospheres were composed of cubic CeO 2 and monoclinic CuO with a typical diameter of around 70 nm. Moreover, the X-ray photoelectron spectroscopy (XPS) analysis illustrated the coexistence of Ce 4+ /Ce 3+ and Cu 2+ /Cu + redox couples in (CuO) x /Ce 0.9 Cu 0.1 O 2 and H 2 temperature-programmed reduction (TPR) measurements indicated the excellent reduction behavior of the catalyst. The Raman spectra illustrated the oxygen vacancy in (CuO) 0.3 /Ce 0.9 Cu 0.1 O 2 , and diffuse-reflectance infrared Fourier transform spectroscopy (DRIFTS) demonstrated the stable existence of Cu + species during CO oxidation. The (CuO) x /Ce 0.9 Cu 0.1 O 2 nanospheres showed excellent catalytic activity toward CO oxidation in normal feed gas (volume ratio of CO/O 2 /N 2 =1:10:89) at ambient temperature. Catalytic tests revealed that the proportion of CuO in the final product has a strong influence on the resultant catalytic activities. The (CuO) x /Ce 0.9 Cu 0.1 O 2 nanospheres hold great application potential as new catalysts for CO oxidation.
研究领域:
催化化学
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材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Zuying Feng,Liang Liu,Lingyao Li,Jiahe Chen,Yuhong Liu,Yan Li,Liang Hao,Yan Wu
Three dimensional (3D) printing has attracted much more interest from the research community due to its ability to make complex structures with high resolution and simplified fabrication process. Here we constructed composited electrolyte with certain thickness for the application of low temperature of solid oxide fuel cells. The fabrication of a thin and dense Sm-doped ceria composite electrolyte layers with the thickness about 1200 μm utilizing paraffin-based slurry were investigated. To optimize the assembled cells, 1.7 wt. % glassfiber was introduced and an amazing electrochemical performance was observed. The maximum power density can reach 448 mW/cm 2 , 20% higher than the one without glassfiber and the open-circuit voltage is approximately 1.0 V at 550 °C. It is of great potential for 3D printing technology to develop low temperature solid fuel cells with designed mini-structures.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Lulu Wang,Beiyue Ma,Xinming Ren,Chao Yu,Chengji Deng,Chunming Liu,Chuanbo Hu
In an attempt to enhance the sintering and mechanical performance of porous cordierite ceramics (Mg 2 Al 4 Si 5 O 18 ) as support materials for vehicle exhaust catalysts, ZrO 2 and M x O y (M = La, Ce, and Nb) were simultaneously introduced into cordierite sintered at 1350 °C for 4 h. Then, the reinforced function of ZrO 2 and M x O y on the properties of porous cordierite ceramics was systematically evaluated, especially for the sample co-doped with ZrO 2 and La 2 O 3 . The results displayed a distinct enhancement in mechanical and thermal performance, and the cold compressive strength increased from 72.74 to 158.59 MPa as well as thermal conductivity ranged from 1.66 to 2.01 W m −1 K −1 , respectively. It is found that ZrO 2 facilitated activation sintering introduced via lattice distortion in cordierite and La 2 O 3 accelerated the formation of cordierite and ZrSiO 4 microcrystalline through the low-temperature liquid phase. The synergic effect between ZrO 2 and La 2 O 3 , therefore, had a significant role in the reinforced mechanical and thermal performance of porous cordierite ceramics. This work not only offers a feasible strengthening strategy, but also expands the possibilities for building high-performance structural and functional ceramics .
研究领域:
材料科学
·
陶瓷工程
·
汽车工程
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Zhiliang Jin,Teng Li,Kai Wang,Xin Guo
Simple high-temperature calcination and hydrothermal methods were followed to synthesize CeO 2 and Mo-S, respectively. The efficient photocatalytic hydrogen evolution activity exhibited by the composite catalysts can be attributed to the edge active sites in Mo-S. The Mo-O bonds formed between CeO 2 and Mo-S could further accelerate the processes of separation and migration of electrons between the catalyst interfaces. The hybrid catalyst 10%-CeO 2 /Mo-S exhibiting the best hydrogen generation ability (4.3 mmol h −1 g −1 ) was obtained by optimizing the content of CeO 2 in CeO 2 /Mo-S. Analysis of the PL spectral profile and photocurrent response recorded for the system revealed that 10%-COMS exhibited excellent photogenerated carrier separation ability. Analysis of the LSV and EIS curves revealed that 10%-COMS exhibited the optimal hydrogen production potential. The charge migration resistance provided by the systems was lower than the charge migration resistance provided by CeO 2 and Mo-S. The synergism between the S-scheme heterojunctions and the Mo-O bonds helped accelerate the separation and migration of photo-induced carriers at the catalyst interfaces. The introduction of covalent bonds in the S-scheme heterojunctions and the results presented herein can potentially help develop a new method to realize photocatalytic hydrogen evolution.
研究领域:
材料科学
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能源科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
·
2019
·Vol. 9
·期 12
·994
·
IF 3.444
Junan Gao,Song Gao,Jun Wei,Hong Zhao,Jie Zhang
In this paper, the catalytic combustion of DMDS (dimethyl disulfide, CH3SSCH3) over bimetallic supported catalysts were investigated. It was confirmed that Cu/γ-Al2O3-CeO2showed best catalytic performance among the five single-metal catalysts. Furthermore, six different metals were separately added into Cu/γ-Al2O3-CeO2to investigate the promoting effect. The experiments revealed Pt as the most effective promoter and the best catalytic performance was achieved as the adding amount of 0.3 wt%. The characterization results indicated that high activity and resistance to sulfur poisoning of Cu-Pt/γ-Al2O3-CeO2could be attributed to the synergistic effect between Cu and Pt.Keywords:catalytic combustion;dimethyl disulfide;bimetallic;supported catalyst
研究领域:
催化
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Wenxia Zhou,Guoqiang Song,Jiaxi Zhong,Yumeng Liu,Xiaohua Chen,Muchen Yu,Shaohan Yuan,Qiliang Fan,Xia Gong,Qian Liu,Feiyang Hu,Lei Gong,Sibudjing Kawi
The CO preferential oxidation is vital for proton exchange membrane fuel cell (PEMFC) stability, and the reverse catalyst design shows promise for improving its activity and durability. Herein, cubic and octahedral Cu2O crystals were synthesized via the solid-phase method. Subsequent decoration with CeO2 yielded inverse CeO2/Cu2O catalysts, and oxidative treatment converted Cu2O to CuO, forming the final CeO2/CuO catalysts. The CeO2/Cu2O catalyst exhibits superior activity compared to CeO2/CuO, with CeO2/Cu2O-8 demonstrating the lowest complete CO conversion temperature (168 °C) and the widest operating window (168–200 °C). This enhanced performance originates from unsaturated copper sites, which facilitate faster electron transfer and oxygen vacancy formation while providing high specific surface area and elevated Ce3+ content. This study established fundamental insights for designing inverse catalysts through crystal plane engineering in CO-PROX, potentially extending to other catalytic systems requiring precise surface control.
研究领域:
催化化学
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材料科学
·
纳米技术
·
能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
·
2014
·
IF 1.188
Xia Huang,Shaojian Lin,Jiaojiao Shang,Wen He,Jianwu Lan
Poly(ether–ester)/cerium oxide (CeO2) composites with CeO2 nanoparticles of 0, 1, 2, 3, 4, and 5 wt% were prepared from dimethyl terephthalate, 1,4-butanediol, polytetramethylene glycol, and CeO2 nanoparticles by traditional melt polymerization. The Fourier transform infrared, scanning electron microscopy, thermal gravimetric analysis, tensile strength, thermal stability, aging resistance, ultraviolet resistance, and low-temperature elastic recovery of these composites were characterized. The results indicated that introduction of CeO2 nanoparticles into poly(ether–ester) can enhance the mechanical, thermal, low-temperature elastic recovery properties and ultraviolet resistance of traditional poly(ether–ester). In particular, the incorporation of 2 wt% CeO2 nanoparticles endowed poly(ether–ester) with the best performance in mechanical and low-temperature elastic recovery properties.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2015
·Vol. 5
·期 5
·2959-2972
·
IF 5.426
Ran Zhang,Li Guo,Chen Chen,Jizhong Chen,Angjun Chen,Xiuge Zhao,Xuerui Liu,Yuhe Xiu,Zhenshan Hou
A novel highly active Mn-doping ceria heterogeneous catalyst (MnOx–CeO2) was prepared and dedicated to the catalytic synthesis of aliphatic carbamates from CO2, aliphatic amines and methanol in one step. The as-obtained catalyst can attain a high yield of carbamate up to 82%, and can also be recycled at least four times through a simple procedure. It was observed that the Mn doping to ceria can alleviate the catalyst deactivation in consecutive catalytic recycles. In this regard, the role of Mn doping in the ceria in the synthesis of the aliphatic carbamates was investigated by means of X-ray diffraction (XRD), Raman spectra, specific surface areas (BET), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), CO2-temperature programmed desorption (CO2-TPD) and in situ diffuse reflectance infrared Fourier transform (DRIFT). The characterization demonstrated that the presence of MnOx in the ceria can not only inhibit the formation of stable carbonate species on the surface of the catalyst but also promote the decomposition/consuming of the carbonaceous species during the synthesis of aliphatic carbamates so as to allow improvement of the recyclability of the catalyst.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yujie Ma,Xianning Yang,Jing Yu,Kun Wang,Xiang Li,Xinyi Liang,Seunghyun Lee,Haijiao Xie,Jingbin Zeng
Rapid, synchronous, and quantitative detection of interleukin-6 (IL-6) and procalcitonin (PCT) is of great significance for the early diagnosis of infectious diseases, yet it remains a formidable challenge for conventional lateral flow immunoassays (LFIAs) due to their inherent semi-quantitative nature and limited sensitivity. Herein, we tackle this challenge through the rational design of dumbbell-shaped Au/end-CeO 2 heterojunctions, where the site-specific deposition of CeO 2 on gold nanorods creates a Schottky interface that profoundly modulates carrier dynamics. This unique architecture effectively suppresses electron-hole recombination and enhances localized electromagnetic fields, yielding an exceptional photothermal conversion efficiency of 58.22%—a 39.3% increase over pure Au nanorods. Capitalizing on this advanced nanomaterial, we engineer a colorimetric/photothermal dual-mode LFIA platform. This platform not only achieves ultrasensitive individual detection of IL-6 and PCT with detection limits as low as 44 and 52 pg·mL −1 , respectively, but also realizes their efficient synchronous co-detection in a single, rapid chromatography step. By integrating visual colorimetric screening with quantitative photothermal readout, this work establishes a material foundation and technical pathway toward highly sensitive, quantitative LFIA systems, providing a referential approach for rapid screening in settings where access to large-scale instrumentation is limited.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2026
·
IF 7.5
Xuanyu Lin,Yiming Qin,Xinyu Feng,Hanzhen Liu,Zhenhang Lu,Xin Tang
CO 2 as a rich source of carbon can provide an alternative route to produce value-added chemicals. Electrocatalysis is one of the most promising approaches to convert CO 2 captured from the atmosphere into valuable chemicals. However, the CO 2 molecule is relatively stable and requires a large amount of energy to activate CO 2 for conversion. We develop a new creative type of solid-state CO 2 fuel cell that can generate high-value-added chemicals through electrochemical reduction of CO 2 without external electrical energy input while achieving self-power generation, operating in the medium temperature range of 400–700 ℃. This study demonstrates a fuel cell operating at 570 °C, which achieves a current density of 686.0 A·m −2 and a power density of 98.8 W·m −2 . Under these conditions, the fuel cell achieved a product formation rate of 140.0 μmol·g cat −1 ·h −1 . The system’s operational parameters enable its integration into combined heat and power (CHP) generation, simultaneously facilitating CO 2 conversion, thereby aligning with sustainable energy and emissions reduction strategies.
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2013
·Vol. 36
·期 2
·271-277
·
IF 1.918
Jingang Hu,Yuming Zhou,Man He,Xiaoming Yang
This study describes a new approach to using microsphere particles for optical diffusion in a liquid crystal display backlighting unit. We developed a one pot synthesis of polysiloxane@CeO 2 -poly(methyl methacrylate) hybrid microspheres and examined its physical and chemical properties by powder transmission electron microscopy (TEM), X-ray diffraction (XRD) analysis, FT-IR spectra analysis, UV–vis spectra analysis and diffusing abilities analysis. FT-IR spectra analysis and XRD analysis confirmed the hybrid structure of the synthesized materials . The TEM and SEM results indicated that the synthesized materials are core–shell microspheres with a conventional structure. In an anti-radiation experiment the hybrid microspheres exhibited a significant improvement over conventional plastic by effectively absorbing ultraviolet light . When the amount of polysiloxane@CeO 2 -poly(methyl methacrylate) was increased to 8 wt%, the microspheres blocked almost all UV light , up to 97.5%. This quality alone suggests that polysiloxane@CeO 2 -poly(methyl methacrylate) hybrid microspheres may be an improvement over materials currently used in conventional optical diffusers. We also characterized diffusing abilities of a novel optical diffuser containing polysiloxane@CeO 2 -PMMA core–shell microspheres and found that a polysiloxane diffuser increased in optical diffusing effect as the quantity of polysiloxane@CeO 2 -PMMA increased, exceeding the diffusing abilities of conventional optical diffusers.
✓ 已验证
DOI
高影响因子
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