JOURNAL OF CHEMICAL RESEARCH
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2017
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IF 0.646
Xiaoyun Ma,Jun Ao,Zhengjian Chen,Yi Liu
A mild one-pot method for the direct conversion of aryl, heteroaryl and alkyl aldehydes into nitriles was achieved by forming the corresponding oximes in situ with NH2OH and allowing them to react with CuO and acetonitrile. Yields of the 13 nitriles prepared were moderate to very good (62–91%).
研究领域:
有机化学
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催化反应
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DOI
高影响因子
Catalysis Science & Technology
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2015
·Vol. 6
·期 9
·3027-3037
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IF 5.426
Yanan Liu,Yufei He,Daran Zhou,Junting Feng,Dianqing Li
Aiming at the preparation of catalysts with well-controlled structures, bimetallic PdCu catalysts containing only small amounts of Pd were prepared by two different methods for partial hydrogenation of acetylene. The highly dispersed and stable PdCu catalyst with the Pd : Cu atomic ratio of 1 : 40 was obtained from a Pd(OH)2/CuMgAl hydrotalcite (HT) precursor by a modified co-precipitation method. The obtained PdCu catalyst possessed uniform PdCu nanoalloys with an average size of 1.8 ± 0.3 nm. As a comparison, the impregnation method was also employed to prepare bimetallic PdCu catalysts and it was confirmed that the Pd-rich(core)–Cu-rich(shell) structure was dominant. Under identical reaction conditions, approximately 100% conversion and 82% selectivity at 100 °C were achieved using the PdCu nanoalloy catalyst which were 23% and 12% higher than those of the Pd-rich(core)–Cu-rich(shell) catalyst. The preferable activity was ascribed to the homogeneous nanoalloy structure and small size effect. The enhanced selectivity was attributed to the strong synergistic effect of PdCu. More significantly, this superior catalytic performance can be retained after 48 h of continuous reaction due to the excellent resistibility against carbon deposition and the confinement effect.
研究领域:
催化化学
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材料科学
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有机合成
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DOI
高影响因子
CATALYSIS LETTERS
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2018
·Vol. 148
·期 9
·2709-2718
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IF 2.911
Liu Zhenzhen,Shen Zhongquan,Zhang Ning,Zhong Wei,Liu Xiaoming
Abstract Homogeneous Cu(I)/NMI/TEMPO catalyst system (TEMPO = 2,2,6,6-tetramethylpiperidine-N-oxyl) has been investigated for its catalysis on the aerobic oxidation of 1-octanol and other alcohols into aldehydes under room temperature. The catalytic species was found to be a Cu(I) centre coordinated by two NMI molecules and other two weakly bound solvent molecules, [Cu(NMI) 2 (Sol) 2 ] + (Sol = solvent). When CuI was used, this species could be [Cu(NMI)I(Sol) 2 ]. Not like being speculated previously, NMI in this system acts solely as a ligand and its role coordinated to the copper centre enhanced the electron density on the metal centre which promoted the O 2 binding in the catalysis. The labile solvent binding to the Cu(I) centre is essential to ensure both oxygen and substrate binding. The catalyst system is suitable for the oxidation of various alcohols using a simple reaction setup and workup. In particular, the system possesses strong oxidizing capability in quantitative conversion of benzylic alcohols regardless of the substituents on the phenyl ring and allylic alcohols into aldehydes. A plausible mechanism was also proposed for the catalysis. Graphical Abstract The aerobic oxidation of primary alcohols at room temperature to corresponding aldehydes was achieved by the catalyst composed by Cu(I) and methyl imidazole (NMI) mediated by TEMPO in acetonitrile. The catalytic species is proposed to be such a Cu(I) complex that two of its four coordinating sites are occupied by a strong ligand(s) and the rest two are weakly bound by solvent molecules.
研究领域:
催化化学
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有机合成
✓ 已验证
DOI
高影响因子
NANO
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2016
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IF 0.951
Guoliang Fan,Liu Zhao,Cairong Gong,Jia Ma,Gang Xue
Copper catalysts prepared using two kinds of supports (BaTiO 3 and Fe 2 O 3 @BaTiO 3 ) have been tested for soot combustion. Perovskite-type oxide BaTiO 3 shows excellent properties as support but has small specific surface area. Fe 2 O 3 @BaTiO 3 core/shell microspheres, as improved support of BaTiO 3 support, were fabricated by a hydrothermal-annealing approach. Fe 2 O 3 @BaTiO 3 support has large specific surface area, which optimizes the contact condition of the gas-soot-catalyst three-phase reaction. Due to the Cu-Fe 2 O 3 @BaTiO 3 interaction, the redox properties of copper are improved. Soot combustion is tested under O 2 gas flow and NO x /O 2 gas flow, and Fe 2 O 3 @BaTiO 3 supported copper catalyst (Cu/Fe 2 O 3 @BaTiO 3 ) all shows higher catalytic activity and CO 2 selectivity than BaTiO 3 supported copper catalyst (Cu/BaTiO 3 ) .
研究领域:
催化化学
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环境科学
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DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
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2021
·
IF 4.354
Hao Song,Yao Xiao,Zhuohua Zhang,Wanjin Xiong,Ren Wang,Liangcheng Guo,Taigang Zhou
A simple and efficient copper-catalyzed selective transfer hydrogenation of nitriles to primary amine-boranes and secondary amines with an oxazaborolidine–BH3 complex is reported. The selectivity control was achieved under mild conditions by switching the solvent and the copper catalysts. More than 30 primary amine-boranes and 40 secondary amines were synthesized via this strategy in high selectivity and yields of up to 95%. The strategy was applied to the synthesis of 15N labeled in 89% yield.
研究领域:
有机化学
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催化化学
✓ 已验证
DOI
PubMed
高影响因子
Catalysts
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2023
·Vol. 13
·期 4
·726
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IF 3.9
Jun Qiao,Kai Zheng,Zhiwei Lin,Huiye Jin,Wenbo Yu,Chao Shen,Aiquan Jia,Qianfeng Zhang
The exploration of inexpensive and stable heterogeneous catalysts for C–S coupling reactions remains a challenging issue. Herein, we successfully prepared a new biomass-derived copper catalyst and applied it to the selective C(sp3)–H-directed sulfonylation of ketone hydrazones with commercial sodium sulfinates. The catalyst was characterized using different spectroscopic and microscopic techniques. Importantly, the prepared biomass-supported Cu catalyst catalyzed the C–S coupling reaction with considerably high activity. A variety of aryl and alkyl sulfinates were converted to the corresponding sulfones with good yields. In particular, the heterogeneous catalyst could be recovered easily after the synthesis and consecutively used at least five times with no appreciable decrease in the catalytic activity. Lastly, the copper catalyst is expected to have further applications in organic reactions catalyzed by Cu/CuO2.Keywords:biomass-derived;copper catalysts;heterogeneous;C–S coupling
研究领域:
有机化学
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催化化学
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产品关联
DOI
高影响因子
Surfaces and Interfaces
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2025
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IF 6.3
Jintao Zhou,Yan Liu,Chuncheng Yang,Guoyong Wang
Doping and interface engineering are both pivotal strategies for enhancing the selectivity of CO 2 reduction catalysts. However, as these strategies have often been explored independently, the question of which is more effective or whether their effects can be synergistically combined remains open. Given that doping and interfaces serve as crystallographic defects, they can be engineered to coexist within the same crystal structure. In this study, we strategically introduced both defects into a copper catalyst by modulating the indium content during crystal growth. Our investigation into the electrochemical performance of these catalysts for CO conversion reveals that while doping consistently enhances conversion selectivity, the presence of Cu/In interfaces disrupts this trend. The most promising catalyst, with 3% indium doping, demonstrated an impressive CO selectivity of 95.38±1.5% and a partial current density of -2.25 mA cm - ² at -0.8 V vs. Reversible Hydrogen Electrode (RHE). This research provides critical insights into the complex interplay between doping and interface engineering, offering a new pathway for the rational design of highly selective CO 2 reduction catalysts.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Canadian Journal of Chemistry
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2011
·Vol. 89
·期 6
·
IF 1.374
ZhuYefeng,WeiYunyang
The copper(I) iodide/1,4-bis(2-hydroxy-3,5-di-tert-butylbenzyl)piperazine (CuI–L2) system catalyzed the cross-coupling reactions between aryl halides and aqueous ammonia in water to produce primary aromatic amines in good yields. The protocol was simple and efficient, avoiding the need for inert atmosphere, additional base, or other additives.
研究领域:
有机化学
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催化化学
✓ 已验证
DOI
高影响因子
Nature Communications
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2025
·Vol. 16
·期 1
·1-11
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IF 15.7
Chi Haoyuan,Liang Zhanpeng,Kuang Siyu,Jin Yaxin,Li Minglu,Yan Tianxiang,Lin Jianlong,Wang Shuangyin,Zhang Sheng,Ma Xinbin
Ethylene glycol, a widely used chemical, has a large global capacity exceeding 40 million tons per year. Nevertheless, its production is heavily reliant on fossil fuels, resulting in substantial CO 2 emissions. Herein, we report an approach for electrochemically producing ethylene glycol from biomass glycerol. This process involves glycerol electrooxidation to glycolaldehyde at anode, which is subsequently electro-reduced to ethylene glycol at cathode. While the anode reaction has been reported, the cathode reaction remains a challenge. An electrodeposited electrode with metallic Cu catalyst enables us to achieve glycolaldehyde-to-ethylene glycol conversion with an exceptional faradaic efficiency of about 80%. Experimental and theoretical studies reveal that metallic Cu catalyst facilitates the C=O activation, promoting glycolaldehyde hydrogenation into ethylene glycol. We further assemble a zero-gap electrolyzer and demonstrate ethylene glycol electrosynthesis from glycerol to give a decent production rate of 1.32 mmol cm –2 h –1 under a 3.48 V cell voltage. The carbon intensity assessment based on a valid assumption reveals that our strategy may reduce CO 2 emissions by over 80 million tons annually compared to conventional fossil fuel routes.
研究领域:
化学工程
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环境科学
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能源研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Wei Zhou,Mazhar Ahmed Memon,Mengmeng Niu,Xinqiang Fan,Yanan Jiang,Xian Zhang,Yuan Liu
Copper (Cu) based catalysts are frequently used in CO 2 hydrogenation, particularly in reverse water-gas shift (rWGS) and CO 2 -to-methanol reaction. Cu 0 and Cu + are the key species affecting the catalyst performance and product distribution . Therefore, constructing and adjusting Cu 0 /Cu + active pairs is significant for the catalyst design . In this study, Cu 0 /Cu + active pairs are obtained by utilizing the properties of perovskite-type oxides (PTOs). A series of CaTi 1-x Cu x O 3 and Ca 0.8 La 0.2 Ti 1-x Cu x O 3 (x = 0.05, 0.10, 0.15, 0.30, 0.40 and 0.50) were synthesized via citric acid complexing method and part of the Cu species entered the PTOs lattice. After reduction, large Cu particles and highly-dispersed Cu clusters were obtained simultaneously. The dispersed Cu clusters have more interfaces with the PTOs and provide abundant Cu + while large Cu particles tend to aggregate and supply mainly Cu 0 . Cu 0 activates H 2 and CO 2 and plays a vital role in the rWGS reaction . Cu + is the active site for methanol synthesis and it can strongly absorb CO. The ratio of Cu 0 /Cu + varies with different Cu content and doping La can also adjust the chemical state of surface Cu. The performance test demonstrates that both excessively high and low Cu 0 /Cu + ratios are beneficial for CO generation, while a moderate ratio is suitable for methanol synthesis . These insights provide a method for regulating the chemical state of surface metal species and help the catalyst design for CO 2 hydrogenation.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
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2025
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IF 5.1
Shuang Xu,Lei Yang,Congya Wang,Liwei Pan,Jing Zhang,Yaling Wang,Hexiang Zhong
With the rapid development of industry, large-scale fossil energy consumption leads to the increase of atmospheric CO2 concentration and the resultant deteriorating global warming. The electrochemical reduction of CO2 (ERCO2) technology is a potential strategy to achieve the CO2 emissions reduction and to realize carbon recycling. However, the lack of high product selective, active and stable catalysts is one of the remaining challenges for the industrial applications of ERCO2. Herein, an electrochemical oxidation-reduction reconstruction method is developed to reconstruct the copper network without extra Cu salt addition obtaining Cu2O-Cu (111) catalysts with nanoporous structures for improving the selectivity and activity of CH4 and C2H4 product. The oxidation-reduction reconstruction derived catalyst achieves improved faradaic efficiency of 56.63% for CH4 product and a partial current density of 41.6 mA cm-2 at -1.38 V (vs. RHE). The selectivity and activity toward C2H4 are also improved. The catalytic superiority originates from synergistic interplay between the Cu₂O-Cu heterogeneous interface and high electrochemical active surface area. Additionally, the presence of abundant oxygen vacancies at the Cu2O-Cu interface accelerate the electron transfer process and promote the high selectivity and activity toward CO2-to-CH4. This study paves a new way for enhancing the selectivity and activity of CO2 electrocatalytic conversion to CH4.
研究领域:
电化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Chemistry and Pharmacy
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2024
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IF 5.5
Wei Yang,Jiaqi Liu,Bingbing Wang,Xiaohui Xu,Zhong Sun
A heterogeneous copper-catalyzed dioxygenation of alkenes with N -hydroxyphthalimide (NHPI) is described, providing concise access to α -oxygenated ketones under air atmosphere without the addition of any extra additives. The heterogeneous catalyst consists of copper and bionic material polydopamine (CuCl 2 @PDA), which has nontoxic, stable, cheap and recyclable characters. The catalyst can be recycled and reused at least 7 times. This reaction shows mild and operationally simple conditions, high efficiency, good substrate scope, excellent functional group compatibility, green and sustainable virtues.
研究领域:
有机化学
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催化科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）