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Nitrite electro-oxidation mediated by Co(II)-[tetra(4-aminophenyl)porphyrin]-modified electrodes: behavior as an amperometric sensor
(TAYLOR & FRANCIS LTD, 2010)
Electro-oxidation of nitrite mediated by Co(II)-[tetra(4-aminophenyl)porphyrin]-modified electrodes (4-CoTAPP) is presented in this article. Catalytic activity of electrodes modified with porphyrin polymeric films ...
Hydrogen Production from Bioethanol: Behavior of a Carbon Oxide Preferential Oxidation Catalyst
(Wiley VCH Verlag, 2017-09)
Hydrogen is recognized as a promising green energy source, particularly when used to feed a polymer electrolyte membrane fuel cell (PEMFC). Here, hydrogen was obtained by bioethanol steam reforming with CO and CO2 as primary ...
Impact of reduced graphene oxide on the ethanol sensing performance of hollow SnO2 nanoparticles under humid atmosphere
(2017-01-01)
The interference of humidity is a key factor to be considered in metal oxide semiconductors gas sensing performance. However, an efficient gas detection under humid conditions is a challenge. Herein, we report the effect ...
Oxide coating containing apatite formed on Ti-25Nb-25Ta alloy treated by Two-Step Plasma Electrolytic Oxidation
(Elsevier B.V., 2020-01-25)
Hydroxyapatite (HA) is a bioactive calcium phosphate capable of enhancing the implant/bone connection improving osteoconductivity and osseointegration process. However, the HA presents mechanical properties limiting its ...
Compressive creep behavior of zirconia/nickel oxide composites
(International Committee on Composite Materials, 2017)
Nickel oxide/zirconia composites with different NiO contensts have been fabricated by mechanical mixing of nickel oxide and zirconia powders and sintering at 1500 ºC for 10 h in air. The resulting microstructures have been ...
Oxidation of H2S in acid solution by Thiobacillus ferrooxidans and Thiobacillus thiooxidans
(Elsevier B.V., 2001-10-01)
Qualitative and quantitative oxidation tests of H2S in acid solution were carried out using Thiobacillus ferrooxidans and Thiobacillus thiooxidans species, Experiments were performed using solutions of H2SO4 (pH 2.0) ...
Antioxidant Activity of Phenolic Compounds in Ethanolic Extract of Hibiscus sabdariffa L. on Oxidative Stability of Soybean Oil
(2021-12-01)
Background: The current interest in natural antioxidants from vegetable sources, mainly in bioactive antioxidants, has been increasing in Brazil. The Hibiscus sabdariffa L. is rich in bioac-tive compounds, besides having ...
VOx/c-Al2O3 catalyst for oxidative dehydrogenation of ethane to ethylene: desorption kinetics and catalytic activity
(Elsevier Science, 2013-01)
This study reports ethane oxidative dehydrogenation (ODH) using lattice oxygen. Ethane ODH is studied under an oxygen-free atmosphere employing a 10 wt.% VOx supported on c-Al2O3. TPR and TPO show that the prepared 10 wt.% ...
Oxidation and abrasive wear of Fe-Si and Fe-Al intermetallic alloys
(SPRINGER, 2010)
In the present work, intermetallic alloys Fe-Si and Fe-Al (Fe(3)Si-C-Cr and Fe(3)Al-C), produced by induction melting, were evaluated regarding their oxidation and abrasive resistance. The tests performed were quasi-isothermal ...