CGO20–CuO composites synthesized by the combustion method and characterized by H2-TPR

Marrero-Jerez, J.; Chinarro, E.; Moreno, B.; Peña-Martínez, J.; Núñez, P.

doi:10.1016/j.ceramint.2015.05.032

Cited by 13 publications

(4 citation statements)

References 26 publications

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“…And copper phyllosilicate species and the CuO cluster could be reduced at ~240 • C [31,34]. Furthermore, the high-temperature reduction peaks (Tr >280 • C) could be attributed to the reduction of bulk CuO [35,36].…”

Section: H 2 -Tpr Resultsmentioning

confidence: 95%

Silica-Supported Copper (II) Oxide Cluster via Ball Milling Method for Catalytic Combustion of Ethyl Acetate

Chen

et al. 2022

Catalysts

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Highly dispersed CuO/SiO2 catalysts were successfully synthesized by a green process of ball milling (BM) under solvent-free and room temperature conditions. The structural evolution of CuO/SiO2 catalysts prepared by BM was elucidated by TG-DSC, XRD, FT-IR, and XPS characterizations. We found that the copper acetate precursor was dispersed over the layer of copper phyllosilicate which was formed by reacting between the copper acetate precursor and the silica support during the BM process. The copper phyllosilicate layer over the support might play an important role in the stabilization of the CuO cluster (<2 nm) during thermal pretreatment. The 15% CuO/SiO2 catalyst exhibited the best catalytic activity for the catalytic combustion of ethyl acetate as it owned a highest active surface area of CuO among the CuO/SiO2 catalysts with different copper loadings.

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Section: H 2 -Tpr Resultsmentioning

confidence: 95%

Silica-Supported Copper (II) Oxide Cluster via Ball Milling Method for Catalytic Combustion of Ethyl Acetate

Chen

et al. 2022

Catalysts

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“…The order of CuO content is as follows: cp -CuO/CF > cpc -CuO/CF > c -CuO/CF > CF. It was noted that the H 2 -consumption peaks of cpc -CuO/CF and c -CuO/CF, with the catalysts ended with CV treatment, shifted to a lower temperature (∼253 °C), in comparison with the catalysts ended with potentiostatic electrolysis treatment, such as cp -CuO/CF and p -CuO/CF (∼285 °C) …”

Section: Resultsmentioning

confidence: 99%

“…It was noted that the H 2 -consumption peaks of cpc-CuO/CF and c-CuO/CF, with the catalysts ended with CV treatment, shifted to a lower temperature (∼253 °C), in comparison with the catalysts ended with potentiostatic electrolysis treatment, such as cp-CuO/CF and p-CuO/CF (∼285 °C). 42 To uncover the role of CuO in HMFOR, we first investigated the HMFOR activities of c-CuO/CF and CF under the same reaction conditions (Figure 1K). As expressed in Figures 2E and S3F, the HMF conversion and FDCA yield over c-CuO/CF increased to ∼95.0 and ∼65.8% from ∼52.3 and ∼12.7% in comparison with the CF.…”

Section: Role Of Cuo In Hmformentioning

confidence: 99%

Enhancing Low-Potential Electrosynthesis of 2,5-Furandicarboxylic Acid on Monolithic CuO by Constructing Oxygen Vacancies

Jia,

Gui,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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Electrosynthesis of 2,5-furandicarboxylic acid (FDCA) from the biomass-derived 5-hydroxymethylfurfural (HMF) is one of the most potential means to produce a bioplastic monomer. Copper oxide (CuO) catalyst shows promising prospects due to its high surface activity, conductivity, and stability, but relatively poor capability of oxygen evolution; however, the weak adsorption of substrates and the lack of facile synthetic strategies largely restrict its practical application. Here, a novel facile in situ method, alternate cycle voltammetry (denoted as c) and potentiostatic electrolysis (denoted as p), was proposed to prepare a monolithic cpc-CuO/Cu-foam electrocatalyst. Along with the increment of CuO and its surficial oxygen vacancies (O V ), the FDCA yield, productivity, and Faradaic efficiency can reach up to ∼98.5%, ∼0.2 mmol/cm 2 , and ∼94.5% under low potential of 1.404 V RHE . Such an efficient electrosynthesis system can be easily scaled up to afford pure FDCA powders. In a combinatory analysis via electron paramagnetic resonance spectroscopy, H 2 temperature-programmed reduction, open circuit potential, infrared spectroscopy, zeta potential, electrochemical measurement, and theoretical calculation, we found that the CuO was the active phase and O V generated on CuO surface can dramatically enhance the adsorption of *HMF and *OH (* denotes an active site), accounting for its superior FDCA production. This work offers an excellent paradigm for enhancing biomass valorization on CuO catalysts by constructing surficial defects.

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“…A suitable anode for the direct oxidation of methane needs good electronic conductivity and electrocatalytic activity decoupled from the tendency to form carbon. Copper based ceria cermets demonstrated to be advantageous in replacing Ni-cermets for direct hydrocarbons SOFCs [2][3][4][5][6]. In these cermets the electrical conductivity is warranted by copper, whereas ceria is responsible for the catalytic activity in oxidation reactions.…”

Section: Introductionmentioning

confidence: 99%

Cu/CGO cermet based electrodes for Symmetric and Reversible Solid Oxide Fuel Cells

Carollo

Garbujo

Bedon

et al. 2020

International Journal of Hydrogen Energy

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Cu-based cermets suitable for electrodes in Symmetric and Reversible Solid Oxide Fuel Cells (SR-SOFCs) based on the Cerium Gadolinum Oxide (CGO) electrolyte were developed and successfully tested in the intermediate temperature range (600-800°C). The Cu/CGO cermets were prepared by means of a self-combustion based citrate procedure and the effects of synthesis conditions were studied. Characterization of the Cu/CGO nanocomposites by XPS, XRD, SEM, TPR suggested that this procedure allows obtaining highly dispersed CuO on the cerium gadolinium oxide. Conversion higher than 80% was observed above 600°C in methane total oxidation. Synthesis parameters affected both properties and catalytic performance. The behaviour under redox conditions was studied by operando high-energy XRD under oscillating H 2 /O 2 feed. Reducing conditions converted CuO into Cu(0) passing through an intermediate Cu 2 O phase while increasing the conductivity and the reactivity. This structural modification was completely reversible. The high stability, reversibility, catalytic activity and electrochemical performance make these electrodes promising for SR-SOFCs.

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CGO20–CuO composites synthesized by the combustion method and characterized by H2-TPR

Cited by 13 publications

References 26 publications

Silica-Supported Copper (II) Oxide Cluster via Ball Milling Method for Catalytic Combustion of Ethyl Acetate

Silica-Supported Copper (II) Oxide Cluster via Ball Milling Method for Catalytic Combustion of Ethyl Acetate

Enhancing Low-Potential Electrosynthesis of 2,5-Furandicarboxylic Acid on Monolithic CuO by Constructing Oxygen Vacancies

Cu/CGO cermet based electrodes for Symmetric and Reversible Solid Oxide Fuel Cells

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