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Optimization of electrochemically synthesized Cu

Kasra Pirzadeh, Ali Asghar Ghoreyshi, Mostafa Rahimnejad, Maedeh Mohammadi

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 2, Pages 233-247 doi: 10.1007/s11705-019-1893-1

Abstract: Cu (BTC) , a common type of metal organic framework (MOF), was synthesized through electrochemical routeTaguchi method was employed for optimization of key parameters affecting the synthesis of Cu (BTC) .using 1 g of ligand, applied voltage of 25 V, synthesis time of 2 h, and electrode length of 3 cm.The single gas sorption capacity of the synthetized microstructure Cu (BTC) for CO (at 298 K and 1Moreover, Cu (BTC) showed no considerable loss in CO adsorption after six sequential cycles.

Keywords： Cu3sub>(BTC)2sub> electrochemical synthesis CO2sub> adsorption Taguchi optimization

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Preparation of Cu/ZnO/Al

Hui FAN, Huayan ZHENG, Zhong LI

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4, Pages 445-451 doi: 10.1007/s11705-010-0521-x

Abstract: Cu/ZnO/Al O catalysts with Cu/Zn/Al ratios of 6/3/1 were precipitated and aged by conventional and microwaveheating methods and tested in the slurry phase reactor for methanol synthesis.microwave irradiation on the catalytic performance was investigated to optimize the preparing condition of Cu

Keywords： microwave irradiation precipitation temperature aging temperature methanol synthesis Cu/ZnO/Al2sub>O3sub> catalyst

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Preparation of Cu/ZrO

Xinmei LIU, Shaofen BAI, Huidong ZHUANG, Zifeng YAN

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 1, Pages 47-52 doi: 10.1007/s11705-011-1170-4

Abstract: Cu/ZrO catalysts for methanol synthesis from CO /H were respectively prepared by deposition coprecipitationand crystal structure of the catalysts are mainly controlled by preparation methods and alkalinity of synthesis

Keywords： Cu/ZrO2sub> methanol synthesis deposition coprecipitation solid state reaction CO2sub>/H2sub>

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Thermodynamic Analysis and Reaction Model of Combustion Synthesis in Al-Cr2sub>O3sub> Systemwith Al2sub>O3sub> and Cr2sub>O3sub> Diluents

Zhang Yancheng,Pan Ye,Zhang Chuan

Strategic Study of CAE 2004, Volume 6, Issue 6, Pages 63-67

Abstract:

The thermodynamic calculation and analysis of combustion synthesis reaction of Al - Cr2O3 system with AI2O3and Cr2O3 diluents were conducted, and the effects of reactionstarting temperature TO, diluents AI2O3 and Cr2O3 on the adiabatic combustion temperature

Keywords： cermet combustion synthesis Al - Cr2sub>O3sub> system thermodynamics reaction model

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A Cu-modified active carbon fiber significantly promoted HS and PH simultaneous removal at a low reaction

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1425-3

Abstract:

• Cu0.15sub>-ACF performs the best for H2sub>S and PH3sub> simultaneous removal.

Keywords： ACF H2sub>S PH3sub> Cu Low temperature Simultaneous removal

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Rh2sub>O3sub>/hexagonal CePO4sub> nanocatalysts for N2sub>O decomposition

Huan Liu, Zhen Ma

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 4, Pages 586-593 doi: 10.1007/s11705-017-1659-6

Abstract: were prepared by a precipitation method and hexagonal CePO nanowires were prepared by hydrothermal synthesis

Keywords： Rh2sub>O3sub> CePO4sub> N2sub>O decomposition

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Cu-doped Bi/Bi2sub>WO6sub> catalysts for efficient N2sub> fixation by photocatalysis

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10, Pages 1412-1422 doi: 10.1007/s11705-023-2312-1

Abstract: In this paper, Cu-doped Bi2sub>WO6sub> was synthesized via a solvothermal method and appliedThe doped Cu had a valence state of +2 and most likely substituted the position of Bi³⁺.of Bi2sub>WO6sub>.The optimized NH3sub> generation rates of Bi/Cu-Bi2sub>WO6sub> reached 624 and 243>2sub>-to-NH3sub> conversion.

Keywords： Bi2sub>WO6sub> Cu doping work function photocatalytic N2sub> fixation charge

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Tuning the catalytic selectivity in electrochemical CO

Jiafang XIE,Yuxi HUANG,Hanqing YU

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 5, Pages 861-866 doi: 10.1007/s11783-014-0742-1

Abstract: Electrochemical conversion of CO to hydrocarbons can relieve both environmental and energy stresses.By tuning the electrochemical parameters, either Cu oxide nanowires or nanoneedles were fabricated andthen electrochemically reduced to the corresponding Cu nanomaterials.The Cu nanowires preferred the formation of C H , while the Cu nanoneedles favored the production ofOur work provides a facile synthetic strategy for preparing Cu-based nanomaterials to achieve selective

Keywords： electrochemical CO2sub> reduction Cu oxide nanostructure selectivity hydrocarbon formation

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An investigation of the CHOH and CO selectivity of CO hydrogenation over Cu–Ce–Zr catalysts

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 6, Pages 950-962 doi: 10.1007/s11705-022-2162-2

Abstract: 2sub> to CO/CH3sub>OH products.The Cu–Ce–Zr catalyst with 2 wt% Ce loading shows higher CO selectivity (SCOsub> = 0.0%At the CO2sub> adsorption step, a larger number of hydroxyl groups over the Cu–Ce–Zr catalystHence, the Cu–Ce–Zr catalyst with 8 wt% Ce loading favors CH3sub>OH selectivity and CO22sub> hydrogenation to CH3sub>OH.

Keywords： CO2sub> hydrogenation Cu–Ce–Zr hydroxyls CO/CH3sub>OH selectivity

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Advantageous mechanochemical synthesis of copper(I) selenide semiconductor, characterization, and properties

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 3, Pages 433-442 doi: 10.1007/s11705-021-2066-6

Abstract: measurements of milled 2Cu/Se mixtures.The X-ray diffraction confirmed the orthorhombic crystal structure of Cu2sub>Se with the crystallite2p and Se 3d signals corresponded to Cu⁺ and Se^2– oxidation states.This type of Cu2sub>Se synthesis can be easily adapted to production dimensions using an industrial, and waste-free manufacturing of Cu2sub>Se.

Keywords： Cu2sub>Se berzelianite nanocrystalline semiconductor mechanochemical synthesis planetary ball

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Ultrasound-assisted co-precipitation synthesis of mesoporous Co3O4–CeO2 composite oxides for highly selective

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 8, Pages 1211-1223 doi: 10.1007/s11705-022-2145-3

Abstract: In this study, a Co3sub>O4sub>–CeO2sub> composite oxide catalyst was successfullyexhibited a higher selectivity to KA-oil, which was benefited from the synergistic effects between Co³⁺/Co²⁺ and Ce⁴⁺/Ce³⁺ redox pairs, than bulk CeO2sub> and/or Co3sub>O4sub>.>3sub>O4sub>–CeO2sub>.

Keywords： Co3sub>O4sub>–CeO2sub> composite oxides cyclohexanone cyclohexanol ultrasonic-assisted

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Catalytic hydrolysis of gaseous HCN over Cu–Ni/γ-Al

Linxia Yan, Senlin Tian, Jian Zhou, Xin Yuan

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 6, doi: 10.1007/s11783-016-0872-8

Abstract: The Cu–Ni/γ-Al O catalyst was prepared to study HCN hydrolysis ?To decompose efficiently hydrogen cyanide (HCN) in exhaust gas, g-Al O -supported bimetallic-based Cu–Nivolume ratio, reaction temperature, and the presence of CO or O on the HCN removal efficiency on the Cu–Ni

Keywords： Hydrogen cyanide Cu–Ni/g-Al2sub>O3sub> Catalytic hydrolysis

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Events and reaction mechanisms during the synthesis of an Al

M. ABDELLAHI, M. ZAKERI, H. BAHMANPOUR

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 2, Pages 123-129 doi: 10.1007/s11705-013-1325-6

Abstract: An Al O -TiB nanocomposite was successfully synthesized by the high energy ball milling of Al, B O and TiO . The structures of the powdered particles formed at different milling times were evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Thermodynamic calculations showed that the composite formed in two steps via highly exothermic mechanically induced self-sustaining reactions (MSRs). The composite started to form at milling times of 9–10 h but the reaction was not complete. The remaining starting materials were consumed by increasing the milling time to 15 h. The XRD patterns of the annealed powders showed that aluminum borate is one of the intermediate products and that it is consumed at higher temperatures. Heat treatment of the 6-h milled sample at 1100 C led to a complete formation of the composite. Increasing the milling time to 15 h led to a refining of the crystallite sizes. A nanocomposite powder with a mean crystallite size of 35–40 nm was obtained after milling for 15 h.

Keywords： ball milling nanocomposite Al2sub>O3sub> TiB2sub>

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CO2sub> methanation and co-methanation of CO and CO2sub> over Mn-promoted Ni/Al2sub>O3sub> catalysts

Kechao Zhao,Zhenhua Li,Li Bian

Frontiers of Chemical Science and Engineering 2016, Volume 10, Issue 2, Pages 273-280 doi: 10.1007/s11705-016-1563-5

Abstract: A series of Mn-promoted 15 wt-% Ni/Al O catalysts were prepared by an incipient wetness impregnation method. The effect of the Mn content on the activity of the Ni/Al O catalysts for CO methanation and the co-methanation of CO and CO in a fixed-bed reactor was investigated. The catalysts were characterized by N physisorption, hydrogen temperature-programmed reduction and desorption, carbon dioxide temperature-programmed desorption, X-ray diffraction and high-resolution transmission electron microscopy. The presence of Mn increased the number of CO adsorption sites and inhibited Ni particle agglomeration due to improved Ni dispersion and weakened interactions between the nickel species and the support. The Mn-promoted 15 wt-% Ni/Al O catalysts had improved CO methanation activity especially at low temperatures (250 to 400 °C). The Mn content was varied from 0.86% to 2.54% and the best CO conversion was achieved with the 1.71Mn-Ni/Al O catalyst. The co-methanation tests on the 1.71Mn-Ni/Al O catalyst indicated that adding Mn markedly enhanced the CO methanation activity especially at low temperatures but it had little influence on the CO methanation performance. CO methanation was more sensitive to the reaction temperature and the space velocity than the CO methanation in the co-methanation process.

Keywords： Mn promotion nickel catalysts CO2sub> methanation co-methanation of CO and CO2sub>

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Investigation of fluorescence characterization and electrochemical behavior on the catalysts of nanosized

Chang-Mao HUNG, Wen-Liang LAI, Jane-Li LIN

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 3, Pages 428-434 doi: 10.1007/s11783-013-0517-0

Abstract: This work describes the environmentally friendly technology for oxidation of ammonia (NH ) to form nitrogen at temperatures range from 423K to 673K by selective catalytic oxidation (SCO) over a nanosized Pt-Rh/γ-Al O catalyst prepared by the incipient wetness impregnation method of hexachloroplatinic acid (H PtCl ) and rhodium (III) nitrate (Rh(NO ) ) with γ-Al O in a tubular fixed-bed flow quartz reactor (TFBR). The characterization of catalysts were thoroughly measured using transmission electron microscopy (TEM), three-dimensional excitation-emission fluorescent matrix (EEFM) spectroscopy, UV-Vis absorption, dynamic light-scattering (DLS), zeta potential meter, and cyclic voltammetry (CV). The results demonstrated that at a temperature of 673K and an oxygen content of 4%, approximately 99% of the NH was removed by catalytic oxidation over the nanosized Pt-Rh/γ-Al O catalyst. N was the main product in NH -SCO process. Further, it reveals that the oxidation of NH was proceeds by the over-oxidation of NH into NO, which was conversely reacted with the NH to yield N . Therefore, the application of nanosized Pt-Rh/γ-Al O catalyst can significantly enhance the catalytic activity toward NH oxidation. One fluorescent peak for fresh catalyst was different with that of exhausted catalyst. It indicates that EEFM spectroscopy was proven to be an appropriate and effective method to characterize the Pt clusters in intrinsic emission from nanosized Pt-Rh/γ-Al O catalyst. Results obtained from the CV may explain the significant catalytic activity of the catalysts.

Keywords： ammonia (NH3sub>) nanosized Pt-Rh/γ-Al2sub>O3sub> catalyst excitation-emission fluorescent