Πλοήγηση ανά Θέμα "Oxygen"
Αποτελέσματα 1-20 από 67
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2D nitrogen-doped hierarchically porous carbon: Key role of low dimensional structure in favoring electrocatalysis and mass transfer for oxygen reduction reaction
(2017)An ultrathin (thickness 1.0 nm) 2D nitrogen-doped hierarchically porous carbon (2DNHPC) film is developed by the nanocasting method; for comparison, a 3D nitrogen-doped ordered mesoporous carbon (3DNOMC) is also synthesized. ... -
3D Co-N-doped hollow carbon spheres as excellent bifunctional electrocatalysts for oxygen reduction reaction and oxygen evolution reaction
(2017)Non-precious materials have been considered as promising bifunctional catalysts towards oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). In the present work, a three dimensional (3D) Co-N co-doped hollow ... -
3D interconnected hierarchically porous N-doped carbon with NH3 activation for efficient oxygen reduction reaction
(2017)In the present work, a novel metal-free ORR electrocatalyst, with large specific surface area (2600 m2 g−1), high content of N dopants (3.12 at.%) and 3D cross-linking hierarchically porous structure (abbreviated as LHNHPC) ... -
802.15.4 - based Efficient Wireless Sensor System Design for Monitoring Blood Oxygen and Heart Rate in IoT Medical Applications
(2020)Oxygen levels and heart rate joint monitoring is based on specialized, and most of the times, expensive oximetry devices. According to literature, many studies highlight the necessity of connecting oximetry devises, under ... -
Ag nanoparticles modified crumpled borophene supported Co3O4 catalyst showing superior oxygen evolution reaction (OER) performance
(2021)Herein, we report borophene decorated with Ag nanoparticles (Ag@B) as a support, which shows greatly enhanced oxygen-evolution-reaction (OER) performance for Co3O4 catalysts. The excellent OER performance of Co3O4-Ag@B is ... -
Automated oxygen delivery in hospitalized patients with acute respiratory failure: A pilot study
(2019)Background and Objectives. Despite its' proven benefits, oxygen therapy may be complicated with potential adverse events such as hypoxemia or hyperoxia-driven hypercapnia. Automated oxygen delivery systems may aid in ... -
Bimetallic−organic framework-derived hierarchically porous Co-Zn-N-C as efficient catalyst for acidic oxygen reduction reaction
(2019)The development of highly active and cost-efficient electrocatalysts toward oxygen reduction reaction (ORR) is essential for widespread application of polymer electrolyte fuel cell (PEFC). In the present work, hierarchically ... -
A catastrophic change in a european protected wetland: From harmful phytoplankton blooms to fish and bird kill
(2022)Understanding the processes that underlay an ecological disaster represents a major scientific challenge. Here, we investigated phytoplankton and zooplankton community changes before and during a fauna mass kill in a ... -
Conductivity of Gd-doped BaCeO3 protonic conductor in H2-H2O-O2 atmospheres
(2013)This work proposes a radically new simple method of evaluation of the proton conductivity based on measurement of the conductivity of ceramic materials depending on the oxygen partial pressure (pO2) at a gradual transition ... -
Cross-double dumbbell-like Pt–Ni nanostructures with enhanced catalytic performance toward the reactions of oxygen reduction and methanol oxidation
(2019)Investigating on well-defined structure-engineering and atomic arrangement of fuel cell catalysts with high activity has attracted considerable research interest the last decade. Specially, unique nanostructures, which ... -
Designing a protonic ceramic fuel cell with novel electrochemically active oxygen electrodes based on doped Nd0.5Ba0.5FeO3-: δ
(2018)The Fe-based perovskite-structured Nd0.5Ba0.5FeO3-δ (NBF) system represents the basis for developing promising electrode materials for solid oxide fuel cells with proton-conducting electrolytes. This study aims at investigating ... -
Determination of nitrous oxide concentration using a solid-electrolyte amperometric sensor
(2019)Herein, are presented the results of the investigation of an electrochemical sensor, based on oxygen-conducting yttria stabilized zirconia (YSZ) solid-state electrolyte, used for the determination of nitrous oxide in gas ... -
Dissolved oxygen technologies as a novel strategy for non-healing wounds: A critical review
(2021)Non-healing wounds are steadily becoming a global-health issue. Prolonged hypoxia propagates wound chronicity; yet, oxygenating treatments are considered inadequate to date. Dissolved oxygen (DO) in aqueous solutions ... -
Effect of dopants on CeO2 based solid state electrolytes for intermediate temperature electrochemical devices
(2011)The present work aims at the investigation of the influence of different dopants' ionic radii and their concentration on both the lattice parameters and the density of Ce1-xLnxO2-δ (x = 0-0.20; Ln = La, Nd, Sm, Eu, Gd, Dy, ... -
Effect of halogen doping on the electronic, electrical, and optical properties of anatase TiO2
(2022)Titanium dioxide (TiO2) is one of the most used oxides in renewable energy applications, such as hydrogen production, photovoltaics, and light-emitting diodes. To further improve the efficiency of the devices, doping ... -
The effect of oxygen and water vapor partial pressures on the total conductivity of BaCe0.7Zr0.1Y0.2O3–Δ
(2017)The effect of oxygen and water vapor partial pressure on the total conductivity of the proton-conducting BaCe0.7Zr0.1Y0.2O3–δ material is investigated in the present work. Single-phase and dense ceramic materials have been ... -
Effect of pore morphology of mesoporous carbons on the electrocatalytic activity of Pt nanoparticles for fuel cell reactions
(2010)In the present investigation, the role of the pore morphology of mesoporous carbons in the electrocatalytic activity of Pt nanoparticles for fuel cell reactions has been successfully revealed by adopting ordered mesoporous ... -
The effect of sleep quality in Sherpani Col High Camp Everest
(2019)Recently, an increasingly higher volume of travelers deciding to get the experience of hiking to the highest summit worldwide has been noted. However, high altitude environments have adverse effects on the normal bodily ... -
Efficient Pt-free electrocatalyst for oxygen reduction reaction: Highly ordered mesoporous N and S co-doped carbon with saccharin as single-source molecular precursor
(2016)Despite that nitrogen (N) and sulfur (S) co-doped ordered mesoporous carbon (OMC) as Pt-free catalyst for oxygen reduction reaction (ORR) shows a desirable performance, the synthesis method is always complicated and ...