INDUSTRIAL CROPS AND PRODUCTS
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2025
·
IF 6.2
Tong Zhang,Haiyong Wang,Chenguang Wang,Qiying Liu
Acetol is the important platform molecule, which showed diversified applications in organic synthesis, pharmaceutic, food and polymer industrials. The production of acetol from selective fructose hydrogenolysis is of scientific and practical interests. However, by catalysis, precisely controlling the target C-C and C-O bonds splitting is an open challenge, resulting in the low target product yields. Herein, by regulating the metal-support-interactions, which enhanced electron transfer capacity and improved acetol production from fructose hydrogenolysis through controlling the important intermediate species, obtaining the highest 53.6 % yield and an average conversion rate of 1.24 × 10 −5 mol/(g cat .s) within short time of 10 min. The interfacial charge transfer in the surface structure of the catalyst along with the Ni metal content was revealed by various characterizations. This research provides a preliminary method for electron transfer regulation of Ni/CeO 2 catalysts in acetol production from fructose hydrogenolysis, showing practical application potentials due to the simple preparation of the catalyst that possibly contribute to the reactions on a large scale.
研究领域:
催化化学
·
可再生化学
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生物质转化
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多相催化
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绿色化学
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产品关联
DOI
高影响因子
Science China-Materials
·
2019
·Vol. 63
·期 6
·959-964
·
IF 5.636
Chen Fang,Li Tianbo,Pan Xiaoli,Guo Yalin,Han Bing,Liu Fei,Qiao Botao,Wang Aiqin,Zhang Tao
Heterogenization of the homogeneous catalysis has been studied for almost 50 years. Single-atom catalysis has the advantages of both homo- and heterogeneous catalysis. It has been proposed, and subsequently experimentally verified that single-atom catalysis is able to bridge homo- and heterogeneous catalysis, thus providing a new avenue to realize the heterogenization of homogeneous catalysis. Alkoxycarbonylation of aryl halides is an effective method for the direct synthesis of carboxylic acid derivatives, and is commonly catalyzed by Pd-based homogeneous complexes with N/P-containing ligands and organic/inorganic base. Herein, we firstly reported that Pd 1 /CeO 2 single-atom catalyst showed good performance in the alkoxycarbonylation of aryl iodides reaction. Under base-free and ligand-free conditions, Pd 1 /CeO 2 single-atom catalyst can transfer different aryl iodides to corresponding products. The catalyst can be easily recovered and reused four times without significant loss of reactivity.
研究领域:
催化化学
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材料化学
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有机合成
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多相催化
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DOI
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
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2016
·Vol. 33
·期 6
·1837-1845
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IF 1.408
Liu Dongjing,Zhou Weiguo,Wu Jiang
Performance of CeO 2 -La 2 O 3 /ZSM-5 sorbents for sulfur removal was examined at temperature ranging from 500 oC to 700 oC. The sulfur capacity of 5Ce5La/ZSM-5 was much bigger than that of CeO 2 /ZSM-5. H 2 had a negative impact on the sulfidation; however, CO had little influence on sulfur removal. The characterization results showed that CeO 2 and La 2 O 3 were well dispersed on ZSM-5 because of the intimate admixing of La 2 O 3 and CeO 2 , the major sulfidation products were Ce 2 O 2 S and La 2 O 2 S, the XRD and SEM results revealed that ZSM-5 structure could remain intact during preparation and sulfidation process, the H 2 -TPR showed that the reducibility of CeO 2 can be remarkably enhanced by addition of La.
研究领域:
材料科学
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环境化学
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催化化学
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能源工程
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无机功能材料
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气体净化
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·Vol. 47
·期 83
·35352-35364
·
IF 7.139
Zhichao Yu,Wei Zhang,Yongxi Zhang,Yaokun Fu,Ying Cheng,Sanyang Guo,Yuan Li,Shumin Han
Magnesium hydroxide (MgH 2 ) has excellent reversibility and high capacity, and is one of the most promising materials for hydrogen storage in practical applications. However, it suffers from high dehydrogenation temperature and slow sorption kinetics. Rare earth hydrides and transition metals can both significantly improve the de/hydrogenation kinetics of MgH 2 . In this work, MgH 2 –Mg 2 NiH 4 –CeH 2.73 is in-situ synthesized by introducing Ni@CeO 2 into MgH 2 . The unique coating structure of Ni@CeO 2 facilitates homogeneous distribution of synergetic CeH 2.73 and Mg 2 NiH 4 catalytic sites in subsequent ball milling process. The as-fabricated composite MgH 2 -10 wt% Ni@CeO 2 powders possess superior hydrogenation/dehydrogenation characteristics, absorbing 4.1 wt% hydrogen within 60 min at 100 °C and releasing 5.44 wt% H 2 within 10 min at 350 °C. The apparent activation energy of MgH 2 -10 wt% Ni@CeO 2 is determined to be 84.8 kJ/mol and it has favorable hydrogen cycling stability with almost no decay in capacity after 10 cycles.
研究领域:
材料科学
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无机化学
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能源化学
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纳米催化
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氢能源存储
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hongpeng Liu,Zhongliang Cao,Siyuan Yang,Zejian Dong,Zi-An Li,Xing Chen,Langli Luo
The dynamic behavior of oxide-supported metal catalyst interfaces under thermal and gaseous activation critically determines their catalytic performance. Using in situ TEM, we reveal the atomic-scale evolution of Au nanoparticles on CeO 2 supports during thermal treatment. The Au/CeO 2 interface structure depends on three key factors: epitaxial matching, nanoparticle morphology, and metal-support interactions, all governed by the balance between Au surface energy, cohesive energy, and interfacial energy with CeO 2 . Thermal activation induces significant structural reorganization in Au nanoparticles, exhibiting size- and support-dependent facet reorientation that follows temperature-driven wetting and sintering trends. These transformations are facilitated by crystalline defects (e.g., twin boundaries and dislocations) that reduce the energy barrier for atomic rearrangement.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Bolin Zhao,Rana Muhammad Irfan,Chuhao Liu,Shamraiz Hussain Talib,Azhar Mahmood,Li Niu
Rare-earth based transition metal oxides have proved to be the most promising candidates in the exploration of non-precious oxygen evolution reaction (OER) catalysts. However, the knowledge regarding their active sites and electrocatalytic mechanism is very limited due to their different crystallization behaviors and there are still big challenges in the efficient coupling of transition and rare-earth metals with full utilization of active sites. To improve and stabilize OER catalysis, we developed the core-shell CeO 2 @CoNiO 2 nanoplates (NPLs) for enhanced and stable OER catalysis. Surprisingly, CeO 2 shell regulates the electronic structure of CoNiO 2 core and increases the number of active sites and oxygen vacancies to achieve high electrochemical performance in a three-electrode system. Compared with CoNiO 2 nanoparticles, the developed core-shell NPLs exhibit favorable performance with an overpotential of only 206 mV at 10 mA/cm 2 and robust electrochemical stability of 500 h at 10 mA/cm 2 and 300 h at 50 mA/cm 2 . In situ Raman spectroscopy unveils that CeO 2 @CoNiO 2 is structurally more stable than CoNiO 2 , which is consistent with its performance persistence. Besides, theoretical calculations confirm that the Ce shell serves as the active centers for OER, and the formed core-shell metal oxides NPLs promote the adsorption and dissociation of water, thus causing the fast generation of O 2 . This work provides a new perspective for designing highly active core-shell structure of mixed metal oxides of transition and rare-earth metals for OER.
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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纳米技术
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能量转换
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2016
·Vol. 6
·期 9
·159
·
IF 2.69
Panpan Guan,Yongjian Li,Jie Zhang,Wei Li
Copper oxide (CuO)-decorated cerium oxide (CeO2) nanoparticles were synthesized and used to detect glucose non-enzymatically. The morphological characteristics and structure of the nanoparticles were characterized through transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. The sensor responses of electrodes to glucose were investigated via an electrochemical method. The CuO/CeO2nanocomposite exhibited a reasonably good sensitivity of 2.77 μA mM−1cm−2, an estimated detection limit of 10 μA, and a good anti-interference ability. The sensor was also fairly stable under ambient conditions.Keywords:cerium oxide;copper oxide;biosensor;glucose;nanocomposite
研究领域:
生物化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Dengfeng Yan,Shengpeng Mo,Yuhai Sun,Quanming Ren,Zhentao Feng,Peirong Chen,Junliang Wu,Mingli Fu,Daiqi Ye
Herein, CeO 2 catalysts with nanotube , nanobelt, and wire-in-nanotube morphologies were successfully fabricated by a facile single spinneret electrospinning technique. And catalytic activity of these electrospun CeO 2 nanomaterials were evaluated by toluene catalytic combustion reaction. Among the three morphologies of CeO 2 catalysts, CeO 2 nanobelt (CeO 2 -NB) presented the best toluene catalytic combustion performance (T 90% = 230 °C) at WHSV = 60,000 mL g −1 h −1 , also exhibited the lowest activation energy (E a = 80.2 kJ/mol). Based on the characterization by TEM , XRD, BET, SEM, XPS, Raman spectroscopy , H 2 -TPR, and O 2 -TPD results, the high catalytic activity of CeO 2 -NB catalyst was attributed to its porous nanobelt morphology with larger specific surface area and the abundance of surface oxygen vacancies. Furthermore, the CeO 2 -NB catalysts presented an excellent durability by longtime on-stream test (as well as presence of 5% vol. water vapor), suggesting its great potential for practical air pollution control application.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2022
·Vol. 29
·期 6
·1873-1882
·
IF 2.523
Song Wenjing,Cai Wenqing,Hu Shihua,Jiang Xingmao,Lai Weikun
Cu–CeO 2 /C composite catalysts with porous structure were prepared by a microwave-assisted carbonization–impregnation method, which demonstrated a significant performance enhancement for the selective hydrogenation of ethylene carbonate. It was shown by XRD, BET, SEM, TEM, XPS and H 2 -TPR that Cu–CeO 2 /C catalysts with appropriate copper-ceria interactions improving the dispersion of copper particles and providing a higher ratio of Cu + /(Cu + + Cu 0 ) and more oxygen vacancies on the surface. These interactions resulted in an enhanced adsorption of ethylene carbonate and a high hydrogenation activity. The effect of significant operating conditions such as reaction temperature, H 2 pressure and substrate ratio on the EC hydrogenation activity over the Cu–CeO 2 /C catalyst was also investigated to predict the optimal conditions to achieve maximum activity in this process.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Wenjie Xu,Cong Yang,Wenming Su,Nongjun Zhong,Xinnian Xia
Adding functional inorganic two-dimensional nanomaterials is an effective means to improve the long-term anti-corrosion ability of polymer coatings . Here, due to the mussels’ adhesive ability to various substrates, polydopamine (PDA) was used to modify hexagonal boron nitride (h-BN) and a novel PDA-BN@CeO 2 nanohybrid was synthesized through an in situ hydrothermal approach. X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, and X-ray photoelectron spectroscopy (XPS) were employed to characterize the as-prepared nanomaterials. The results of salt spray test and electrochemical measurement showed that the composite coatings exhibited a notable superiority in enhancing the anti-corrosion performance, in which the |Z| 0.01 Hz was nearly three orders of magnitude higher than that of the neat epoxy coatings when soaked for 35 days. The enhancement mechanism can be attributed to the synergistic effect of BN nanosheets extending the corrosion medium diffusion pathway and CeO 2 acting as a corrosion inhibitor to block the contact of corrosion ions with the metal substrate. This study provides a new way for the development of h-BN-based anti-corrosion materials.
研究领域:
材料科学
·
腐蚀与防护
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Yuanjie Xu,Rong Chen,Hongqiao Lin,Qian Lv,Bo Liu,Lizhi Wu,Li Tan,Yihu Dai,Xupeng Zong,Yu Tang
Catalyst interface determines the activity and stability of partial oxidation of methane (POM) toward syngas under high temperatures crucially. Herein, Ni catalysts supported on CeO 2 were prepared under different pretreatment atmospheres to construct an optimal and robust interface. Ni/CeO 2 catalyst pretreated in H 2 (Ni/CeO 2 -H 2 ) exhibits the higher activity and the better stability than Ni/CeO 2 -Ar and Ni/CeO 2 -air catalysts. The Ni-O-Ce interfacial site in Ni/CeO 2 -H 2 catalyst shows the lower reduction temperature, indicating the enhanced H-spillover effect and enhanced oxidation resistance of Ni under POM conditions. Moreover, the XPS and in situ Raman results show that Ni/CeO 2 -H 2 contains more surface oxygen vacancies for adsorbing and activating oxygen, further contributing to the reaction activity. The in situ DRIFTS results indicate that the CH 4 could react with the lattice oxygen to form formate and carbonate, and further decompose to CO and CO 2 . These findings deepen the fundamental understanding of Ni/CeO 2 catalysts for POM reaction.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
TRANSACTIONS OF TIANJIN UNIVERSITY
·
2024
·
IF 6.7
Meng Zhaohui,Liao Ying,Liu Ling,Li Yaqian,Yan Hao,Feng Xiang,Chen Xiaobo,Liu Yibin,Yang Chaohe
Improving the efficiency of metal/reducible metal oxide interfacial sites for hydrogenation reactions of unsaturated groups (e.g., C=C and C=O) is a promising yet challenging endeavor. In our study, we developed a Pd/CeO 2 catalyst by enhancing the oxygen vacancy (O V ) concentration in CeO 2 through high-temperature treatment. This process led to the formation of an interface structure ideal for supporting the hydrogenation of methyl oleate to methyl stearate. Specifically, metal Pd 0 atoms bonded to the O V in defective CeO 2 formed Pd 0 –O V –Ce 3+ interfacial sites, enabling strong electron transfer from CeO 2 to Pd. The interfacial sites exhibit a synergistic adsorption effect on the reaction substrate. Pd 0 sites promote the adsorption and activation of C=C bonds, while O V preferably adsorbs C=O bonds, mitigating competition with C=C bonds for Pd 0 adsorption sites. This synergy ensures rapid C=C bond activation and accelerates the attack of active H* species on the semi-hydrogenated intermediate. As a result, our Pd/CeO 2 -500 catalyst, enriched with Pd 0 –O V –Ce 3+ interfacial sites, demonstrated excellent hydrogenation activity at just 30 °C. The catalyst achieved a Cis–C18:1 conversion rate of 99.8% and a methyl stearate formation rate of 5.7 mol/(h·g metal ). This work revealed the interfacial sites for enhanced hydrogenation reactions and provided ideas for designing highly active hydrogenation catalysts.
研究领域:
催化化学
·
材料科学
✓ 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）