APPLIED CATALYSIS A-GENERAL
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2014
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IF 3.674
Xiuquan Jia,Jiping Ma,Min Wang,Zhongtian Du,Fang Lu,Feng Wang,Jie Xu
The promoted effect of Cu(NO 3 ) 2 on aerobic oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF) catalyzed by VOSO 4 in acetonitrile was intensively investigated. It was revealed that Cu(NO 3 ) 2 facilitated the activation of VOSO 4 to generate active V 5+ species via the generation of NO x gas. The high DFF selectivity is ascribed to Cu 2+ cation which can effectively prohibit oxidative C C bond cleavage reaction of HMF and prevent radical reaction of DFF to humins. In addition, the polarity of solvent plays a great role on high selectivity of DFF.
研究领域:
催化
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化学工程
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有机化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2013
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IF 4.675
Kaiqiang Wu,Dongjie Wang,Lianyi Shao,Miao Shui,Rui Ma,Mengmeng Lao,Nengbing Long,Yuanlong Ren,Jie Shu
For the first time, Cu(NO 3 ) 2 · x H 2 O ( x ≤ 2.5) is investigated as a new lithium storage anode material for lithium-ion batteries. The impressive characteristic of Cu(NO 3 ) 2 · x H 2 O( x ≤ 2.5)/Li cell is the high initial discharge capacity reaching to around 2200 mAh g −1 . To make a comparison, Cu(NO 3 ) 2 ·2.5H 2 O electrodes are used as raw materials and heat-treated at 80, 120 and 160 °C. Among all the three samples, Cu(NO 3 ) 2 · x H 2 O ( x < 2.5) obtained at 160 °C shows the highest reversible capacity of 597.6 mAh g −1 and the best cycling stability after 30 cycles. The difference in electrochemical behaviors is attributed to the variation of surface morphology , crystal water and particles size after heat-treatment at different temperatures. Besides, the thermal reaction results also show that Cu(NO 3 ) 2 · x H 2 O ( x < 2.5) obtained at 160 °C has the highest thermal stability among all the three samples after repeated cycles. The present findings can provide the fact that Cu(NO 3 ) 2 · x H 2 O (≤2.5) may be a promising anode material for lithium-ion batteries.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Yuan Chen,Yanchen Sun,Gaojie Fang,Wenyao Huang,Quan Wang
The performance of energetic hydrogels—a promising class of water-resistant explosives—is often related to the internal microstructure and chemical reactivity. This study introduces a modification strategy employing copper (II) nitrate trihydrate (Cu(NO 3 ) 2 ·3H 2 O) to simultaneously tailor the hydrogel’s microstructure and enhance its chemical reactivity. The additive functions dually: by acidifying the system, it accelerates cross-linking kinetics and refines sensitized microbubbles; concurrently, it lowers the thermal decomposition barrier of the gel matrix. At an optimal content of 0.75 wt%, the proportion of effective microbubbles (diameter ≤ 100 µm) is maximized to 42.2 %, establishing a dense hotspot network. This microstructural and chemical optimization synergistically boosts detonation performance, increasing velocity by 15.34 % to 4610 m·s⁻¹ and reducing the minimum initiation charge from 50 g to 30 g. Thermal analysis confirms a reduced apparent activation energy and reveals a possible low-temperature exothermic pathway, providing direct evidence for the enhanced reactivity. Crucially, this enhancement does not compromise handling safety, as the initial decomposition temperature remains above 244 °C for all formulations. This work establishes additive-mediated modification as an effective route to engineer energetic materials by concurrently optimizing the microstructure and accelerating the reaction kinetics.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2017
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IF 6.216
Xuanwen Xu,Guoqiang Huang,Shuai Qi
Adsorbents including CuCl 2 -AC, CuCl 2 -13X, Cu(NO 3 ) 2 -AC and Cu(NO 3 ) 2 -13X were prepared to remove trace phosphine from recycled hydrogen in the Siemens process of producing polysilicon , and adsorptive mechanisms were determined by X-ray diffraction and intermittent breakthrough experiments. CuCl 2 could disperse better on supporters than Cu(NO 3 ) 2 , and it existed in its original form. However, Cu(NO 3 ) 2 decomposed into copper oxide or basic cupric nitrate, and showed conspicuous thermal aggregation effect after calcination . Interactive effects between cupric components and supporters varied form species to species and deactivated the reactivity of CuCl 2 and Cu(NO 3 ) 2 in different degree, which resulted in disparities of adsorbents’ performances. CuCl 2 -AC and Cu(NO 3 ) 2 -AC had better performances than CuCl 2 -13X and Cu(NO 3 ) 2 -13X because cupric components were deactivated more when loaded on 13X zeolite. Chemical transformation of phosphine made adsorbents’ surface renewable, and the renewed rate depended on the reactivity of cupric components. All of adsorbents showed significant recoveries of efficiencies in intermittent experiments.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
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2019
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IF 0
Li-Ping Yang,Jian-Li Mi,Jia-Hao Liang,Zhao-Yang Zu,Peng Zhang
A simple and efficient method was developed to prepare a copper–carbon (Cu–C) catalyst with high oxygen reduction reaction (ORR) activity via direct pyrolysis of a mixture of metal salts (Cu(NO3)2·3H2O and Zn(CH3COO)2) and 1,3,5-benzenetricarbocylic acid at 1010 °C under a N2 stream. It is found that the Cu–C catalyst exhibits superior catalytic activity toward ORR with a half-wave potential of 0.81 V and a four-electron transfer pathway in 0.1 M KOH electrolyte. Generally, it is known that N plays an important role for the high ORR catalytic activities of nonprecious metal-doped carbon materials. Herein, we demonstrate that N is not required for the superior catalytic activity of Cu–C materials. Both the Cu particles and the embedded Cu atoms in the carbon substrate are suggested to provide the ORR active sites. In addition, despite the fact that the Zn is removed during the pyrolysis, the adding of Zn salt in the precursor is important for the enhanced catalytic activity. The evaporation of Zn during the pyrolysis results in the large surface area of the catalyst, which is beneficial to the mass transfer during the catalytic process. Moreover, a large number of carbon defects can be created via the removal of Zn atoms that facilitated the ORR.
研究领域:
材料科学
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电化学
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催化
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）