Electrochemical production of cuprous oxide and metallic nickel in a two-compartment cell

1994 ◽  
Vol 24 (6) ◽  
pp. 542-547 ◽  
Author(s):  
R. Gana ◽  
M. Figueroa ◽  
A. Aragón ◽  
M. T. San Martín ◽  
L. Kattan
Keyword(s):  
Cuprous Oxide ◽  
Metallic Nickel ◽  
Electrochemical Production ◽  
Compartment Cell

Electrochemical production of cuprous oxide using the anode-support system

1993 ◽  
Vol 23 (4) ◽  
pp. 308-315 ◽  
Author(s):  
M. G. Figueroa ◽  
R. E. Gana ◽  
W. C. Cooper ◽  
J. Ji
Keyword(s):  
Support System ◽  
Cuprous Oxide ◽  
Electrochemical Production ◽  
Anode Support

Characterization of intergranular cuprous oxide in polycrystalline YBa2Cu3O7-x

1988 ◽  
Vol 46 ◽  
pp. 880-881
Author(s):  
Bradley L. Thiel ◽  
Chan Han R. P. ◽  
Kurosky L. C. Hutter ◽  
I. A. Aksay ◽  
Mehmet Sarikaya
Keyword(s):  
Grain Boundary ◽  
Cuprous Oxide ◽  
Room Temperature ◽  
Boundary Phase ◽  
Spectroscopic Techniques ◽  
Transition Width ◽  
Practical Applications ◽  
Thin Foils ◽  
Superconducting Oxides

The identification of extraneous phases is important in understanding of high Tc superconducting oxides. The spectroscopic techniques commonly used in determining the origin of superconductivity (such as RAMAN, XPS, AES, and EXAFS) are surface-sensitive. Hence a grain boundary phase several nanometers thick could produce irrelevant spectroscopic results and cause erroneous conclusions. The intergranular phases present a major technological consideration for practical applications. In this communication we report the identification of a Cu2O grain boundary phase which forms during the sintering of YBa2Cu3O7-x (1:2:3 compound).Samples are prepared using a mixture of Y2O3. CuO, and BaO2 powders dispersed in ethanol for complete mixing. The pellets pressed at 20,000 psi are heated to 950°C at a rate of 5°C per min, held for 1 hr, and cooled at 1°C per min to room temperature. The samples show a Tc of 91K with a transition width of 2K. In order to prevent damage, a low temperature stage is used in milling to prepare thin foils which are then observed, using a liquid nitrogen holder, in a Philips 430T at 300 kV.

scholarly journals Bioinspired Nacre‐Like Alumina with a Metallic Nickel Compliant Phase Fabricated by Spark‐Plasma Sintering

Small ◽  
2019 ◽  
Vol 15 (31) ◽  
pp. 1900573 ◽  
Author(s):  
Amy Wat ◽  
Claudio Ferraro ◽  
Xu Deng ◽  
Andrew Sweet ◽  
Antoni P. Tomsia ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Metallic Nickel ◽  
Plasma Sintering ◽  
Spark Plasma

scholarly journals Graphite Studded with Facile-Synthesized Cu2O Nanoparticle-Based Cubes as a Novel Electrochemical Sensor for Highly Sensitive Voltametric Determination of Mebeverine Hydrochloride

Chemosensors ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 35
Author(s):  
Ahmed H. Naggar ◽  
Ahmed Kotb ◽  
Ahmed A. Gahlan ◽  
Mahmoud H. Mahross ◽  
Abd El-Aziz Y. El-Sayed ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Lower Limit ◽  
Electrochemical Behavior ◽  
Cuprous Oxide ◽  
Density Functional ◽  
Limit Of Detection ◽  
Biological Fluids ◽  
Chemical Reduction ◽  
Anodic Stripping Voltammetry ◽  
Mebeverine Hydrochloride

Herein, a feasible chemical reduction method followed by intensive mixing was applied for the preparation of an attractive material based on graphite studded with cuprous oxide nanoparticle-based cubes (Cu2ONPs–C@G). Transmission electron microscope (TEM), scanning electron microscope (SEM), X-ray diffraction (XRD) and cyclic voltammetry (CV) were utilized for characterization. Cuprous oxide nanoparticles (Cu2ONPs), with a diameter range mainly distributed from 4 to 20 nm, aggregate to form microcubes (Cu2ONPs–C) with an average diameter of about 367 nm. Paste electrode was prepared using Cu2ONPs–C@G (Cu2ONPs–C@G/PE) for voltametric quantification of the musculotropic antispasmodic drug: mebeverine hydrochloride (MEB). The electrochemical behavior of MEB was studied using CV, and the optimum analytical parameters were investigated using square wave adsorptive anodic stripping voltammetry (SWAdASV). Moreover, density functional theory (DFT) was used to emphasize the ability of MEB to form a complex with Cu2+, confirming the suggested electrochemical behavior of MEB at Cu2ONPs–C@G/PE. With good stability and high reproducibility, SWAdASV of Cu2ONPs–C@G/PE shows successful quantification of MEB over the concentration range of 5.00 × 10−11–1.10 × 10−9 M with lower limit of detection (LOD) and lower limit of quantification (LOQ) values of 2.41 × 10−11 M and 8.05 × 10−11 M, respectively. Finally, accurate quantification of MEB in dosage forms (tablets) and biological fluids (spiked human urine and plasma samples) was achieved using Cu2ONPs-C@G/PE.

Electrochemical Production of Formic Acid from CO 2 with Cetyltrimethylammonium Bromide‐Assisted Copper‐Based Catalysts

ChemSusChem ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 1962-1969
Author(s):  
Yanling Qiu ◽  
Wenbin Xu ◽  
Pengfei Yao ◽  
Qiong Zheng ◽  
Huamin Zhang ◽  
...  
Keyword(s):  
Formic Acid ◽  
Cetyltrimethylammonium Bromide ◽  
Electrochemical Production
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