Applied Catalysis O: Open
·
2024
·
IF 0
Jiayuan Nie,Pengyu Yin,Qiusheng Yang,Zhihui Li,Yanji Wang,Xiaoshu Ding,Dongsheng Zhang
In this study, metallic vanadium was used as catalysts for direct amination of toluene with hydroxylamine to produce toluidine under mild conditions. High toluene conversion and toluidine selectivity were obtained, corresponding to 87.62% and 96.45% respectively. Additionally, thermodynamic and kinetic calculations were carried out. It was concluded that the reaction was dominated by kinetics, with the distribution of three products being para > ortho > meta. The computational and experimental results indicated that the amination process involves an amino radical mechanism.
研究领域:
有机化学
·
催化化学
·
反应工程
✓ 已验证
DOI
CATALYSIS COMMUNICATIONS
·
2020
·
IF 3.612
Yangyang Tang,Zhongtian Du,Meijin Li,Wanhui Wang,Yonghou Xiao
Catalytic oxidation of alcohols containing heteroatoms with molecular oxygen is usually rather challenging, as transition metal catalysts are easily deactivated by heteroatoms. In contrast to conventional results, herein facile oxidation of 2-pyridinemethanol with dioxgyen was observed over simple vanadium catalysts including VOSO 4 or VO(acac) 2 , which seemed much easier than that of benzyl alcohol. 2-Pyridinemethanol could coordinate with the vanadium center , which would promote oxidation of 2-pyridinemethanol itself, rather than deactivate vanadium catalysts. This study would provide a new clue to develop efficient catalysts for transformations of heterocyclic compounds .
研究领域:
催化化学
·
有机化学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Lin Yan,Li Hui,Miao Xiaodong,Sun Yunayuan,Ren Hao,Yu Xifeng,Cui Wangyang,Wu Mingbo,Li Zhongtao
Direct electro-epoxidation of propylene (D-EOPO) with a membrane electrode assembly (MEA) system represents a sustainable approach for producing propylene oxide, which can reduce ohmic losses and simplify product separation. To address the challenges of selectivity and activity, we develop an Ag/V catalyst and integrate it into the “liquid-free” MEA reactor for continues D-EOPO. The V in the catalyst facilitates the formation of Ag-O active centers, thereby reducing the generation energy of *O radicals. Meanwhile, V doping also results in a downshift of the d -band center of the Ag sites. Consequently, the formation of the crucial intermediate (*OC 3 H 6 ) is significantly accelerated through the coupling *O with adsorbed propylene, thereby markedly improving propylene oxide (PO) production. The MEA reactor, integrated with the developed Ag/V catalyst, can maintain a stable production rate of PO at 227 μmol/h over a period of 78 hours. Thus, the “liquid-free” electro-epoxidation protocol developed here exhibits greater industrial applicability.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2025
·
IF 7.5
Qibin Yuan,Ben Bin Xu,YiZhen Su,Fuquan Xiao,Shitao Zhi,Ye Xiao,Linhua Zhu,Chunyan Dai
The engineering of oxygen vacancies represents a strategic advancement in the pursuit of enhancing the electronic structure, surface characteristics, and the proliferation of active sites in oxygen-rich catalysts, thus significantly enhancing their catalytic performance. Herein, we have developed and synthesized an oxygen-deficient phosphomolybdate-vanadium (P 6 MoV) catalyst, utilizing phytic acid − a compound rich in phosphoric acid groups − as a cornerstone for facilitating catalytic oxidative desulfurization (ODS). Remarkably, this catalyst demonstrates a profound desulfurization efficiency, achieving a remarkable 99.55% efficiency in desulfurizing aromatic sulfides even at a low temperature of 0 °C. Additionally, its resilience is highlighted by impressive recyclability, maintaining performance for up to 20 cycles of use. Through meticulous design and innovative application of phytic acid, this study not only highlights the pivotal role of oxygen vacancy engineering in catalysis but also establishes new paradigms in the efficiency and sustainability of oxidative desulfurization processes.
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
CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Yujie Zhan,Chengqin Zhong,Mingli Bi,Yafei Liang,Yuji Qi,Jiaqi Chen,Jiaxu Liu,Xindang Zhang,Shuai Zhang,Yehong Wang,Feng Wang
Iron-Vanadium (FeV) catalyst showed a unique catalytic activity for the selective oxidation of methanol to formaldehyde; however, due to its complex compositions, the identification of catalytic active sites still remains challenging, inhibiting the rational design of excellent FeV-based catalysts. Here, in this work, a series of FeV catalysts with various compositions, including FeVO 4 , isolated VO x , low-polymerized V n O x , and crystalline V 2 O 5 were prepared by controlling the preparation conditions, and were applied to methanol oxidation to formaldehyde reaction. A FeV 1.1 catalyst, which consisted of FeVO 4 and low-polymerized V n O x species showed an excellent catalytic performance with a methanol conversion of 92.3% and a formaldehyde selectivity of 90.6%, which was comparable to that of conventional iron-molybdate catalyst. The results of CH 3 OH-IR, O 2 pulse and control experiments revealed a crucial synergistic effect between FeVO 4 and low-polymerized V n O x . It enhanced the oxygen supply capacity and suitable binding and adsorption strengths for formaldehyde intermediates, contributing to the high catalytic activity and formaldehyde selectivity. This study not only advances the understanding of FeV structure but also offers valuable guidelines for selective methanol oxidation to formaldehyde.
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
TETRAHEDRON-ASYMMETRY
·
2011
·
IF 2.484
Qingle Zeng,Yuxing Gao,Junyu Dong,Wen Weng,Yufen Zhao
The enantioselective oxidation of allyl sulfides with a vanadyl complex of 3,5-diiodosalicylidene tert -leucinol as a catalyst and aqueous hydrogen peroxide as an oxidant afforded chiral allyl sulfoxides with high enantioselectivities of up to 97.3% ee and moderate yields.
研究领域:
有机化学
·
催化化学
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2015
·Vol. 17
·期 11
·4968-4973
·
IF 8.02
Yangyang Ma,Zhongtian Du,Junxia Liu,Fei Xia,Jie Xu
Selective transformation of lignin into value-added aromatics is highly attractive and rather challenging. Catalytic oxidative degradation provides a promising approach to obtain aromatics from lignin while preserving the benzene units. In this study, vanadium-catalyzed aerobic oxidation of 2-phenoxy-1-phenylethanol was studied as a lignin model compound. The solvent played a significant role in the distribution of oxidation products. In the presence of acetic acid, oxidative C–C bond cleavage was preferred, while oxidation products via C–H bond cleavage were rather limited. A one-electron transfer process was involved in the oxidation reaction. The occurrence of vanadium(V) was detected, and the carboxylic group could coordinate to vanadium(V) through exchange with the acetylacetonato ligand during oxidation in the presence of acetic acid.
研究领域:
化学
·
催化科学
✓ 已验证
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2025
·
IF 2.7
Shiyang Wang,Chunlin Yang,Yibin Zhan,Ning Zhao,Jianhao Guo,Xiaofeng Xue,Liting Wei,Shuang Chen,Yang Yang,Boping Liu,Yulong Jin
Producing polyethylene (PE) with broad or bimodal molecular weight distribution (MWD) in one reactor using bimetallic catalysis is a cost- and energy-effective technique in the polyolefin industry. However, this technique is still faced with great challenges, including the difficulty in molecular weight (MW) regulation and poisonous effect commonly observed between the two metals resulting from strong interactions. In this work, a series of bimetallic catalysts CpCr/imidoV/silica with different Cr/V molar ratios were fabricated by anchoring Cp 2 Cr onto imidoV/silica, and the two mono-metallic catalysts CpCr/silica and imidoV/silica were also prepared for comparison. The results show that not only the activity but also the responses to alkyl-Al cocatalyst, polymerization temperature, and hydrogen were distinct between CpCr/silica and imidoV/silica. The interactions between Cr and V sites seemed to be weak. As a result, their different catalytic behaviors were generally reserved, thus making it possible to regulate the activity and the MW of PE products by adjusting Cr/V molar ratio. Thanks to the distinct hydrogen responses of Cr and V on bimetallic catalysts, bi- or broad-modal PE was successfully synthesized by hydrogen regulation. The relative content of low and high MW fractions could be adjusted by altering both the Cr/V molar ratio and hydrogen partial pressure.
研究领域:
高分子化学
·
催化化学
·
材料科学
·
聚合物合成
·
配位聚合
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 18
·53492-53504
·
IF 5.8
Tang Hao,Liu Xiaolong,Li Yiren,Tian Jinglei,Hou Changjiang,Tian Mengkui,Zhu Tingyu
Based on the unique technique property of grate–kiln pellet production process and its demand of ultra-low emission of NO x , a low energy-consumed embedded selective catalytic reduction (SCR) denitration technology was proposed. The temperature of the NO x -containing tributary flue gas was 350–500 °C, which basically accorded with the temperature range of SCR by V 2 O 5 -based catalyst. Considering the potential inhibition effect of high SO 2 concentration (8000–10000 mg/m 3 ) and metal-containing dust in the pelletizing flue gas, the catalyst compositions were optimized to V 2 O 5 (0.5%) and WO 3 (5%), giving NO conversion over 90% with low yield of N 2 O by-product. Compared with the low-medium temperature SCR technology, it was no longer necessary to reheat the flue gas, showing a remarkable CO 2 emission reduction effect. The CO 2 emission reduction ratios were 94% and 66% contributed by the decrease of fuel and electricity consumption for the embedded SCR technology, respectively. The operating cost was also greatly reduced from 11.4 CNY/t-pellet to 3.1 CNY/t-pellet (Chinese Yuan).
研究领域:
环境工程
·
大气污染控制
·
化学工程
·
能源与环境科学
·
工业生态学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chuanchuan Zhao,Xuehui Liu,Xinhao Chang,Shimei Xu,Yu-Zhong Wang
The high-value recycling of waste wind turbine blades not only mitigates environmental pollution but also advances resource circularity, but the current recycling approaches predominantly focus on the segregated recovery of degraded products and fibers, in which a fundamental challenge lies in reconciling high-quality fiber recovery with value-added utilization of degraded products. Furthermore, the practical application of the recycled fibers is constrained by size and structure limitations. Herein, we developed an innovative strategy for synergistic co-upcycling of fiber and degraded products through one-pot catalytic oxidation approach. Under the joint action of oxygen and only 4 wt% vanadium catalyst, the C O bond in epoxy resin (EP) is selectively cleaved to yield hydroxyl-rich degraded products (DEP), the fibers are simultaneously oxidized and modified. By integrating DEP and modified fibers in situ, a strong and tough adhesive (DEP-RGF) is obtained, its adhesion strength and fracture displacement on wood are 5.30 MPa and 1.44 mm, respectively, both parameters doubling those of pure DEP. Notably, the adhesive performances of DEP-RGF are better than that of the composite fabricated by mixing DEP with original fibers. Furthermore, DEP-RGF also exhibits strong adhesion to diverse substrates such as metal, plastics and glass, achieving a maximum adhesion strength of 10.86 MPa. This simple and efficient recycling method not only offers a viable solution for the sustainability of wind energy technologies, but also provides valuable insights into the upcycling of other types of mixed plastics.
研究领域:
材料科学
·
回收技术
·
高分子化学
·
可持续能源
·
环境工程
✓ 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）