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Αποτελέσματα 91-100 από 120
Direct ethanol PEM fuel cells: The case of platinum based anodes
(2005)
PtSn/C catalysts were prepared by the direct decoration of Pt/C with Sn through a modified poly process. XRD results showed there existed obvious SnO2 in this catalyst, different from the PtSn/C prepared by co-precipitation, ...
Performance comparison of low-temperature direct alcohol fuel cells with different anode catalysts
(2004)
Low-temperature polymer electrolyte membrane fuel cells directly fed by methanol and ethanol were investigated employing carbon supported Pt, PtSn and PtRu as anode catalysts, respectively. Employing Pt/C as anode catalyst, ...
Direct methanol fuel cells: The effect of electrode fabrication procedure on MEAs structural properties and cell performance
(2005)
In the present paper, the effect of electrode preparation procedure on the structural properties of membrane electrode assembly (MEA) and consequently on the performance of direct methanol fuel cells (DMFCs) was investigated. ...
Preparation and characterization of a novel KOH activated graphite felt cathode for the electro-Fenton process
(2015)
In the present investigation, graphite felt (GF) activated by KOH at high temperature is adopted as the electro-Fenton cathode for degrading organic pollutants contained in the wastewater. Scanning electron microscopy ...
Nitrogen-doped ordered mesoporous carbon: synthesis and active sites for electrocatalysis of oxygen reduction reaction
(2015)
In the present work, a novel impregnation method, namely vaporization-capillary condensation method, is developed to synthesize nitrogen-doped ordered mesoporous carbon. This method allows for the preferential infiltration ...
Solid oxide fuel cell stack: Temperature regulation
(2011)
A fuel cell produces electricity and heat [1,2]. Low thermal conductivity of materials composed a solid oxide fuel cell (SOFC) and absence of effective heat carriers can lead to significant temperature irregularity within ...
Thermal expansion of materials in the barium cerate-zirconate system
(2015)
The thermal expansion of proton-conducting materials in the BaCe0.8 - x Zr (x) Y0.2O3 - delta system has been investigated in air. The influence of the zirconium concentration and the measurement mode (heating/cooling) on ...
Investigation of the structural and electrical properties of Co-doped BaCe0.9Gd0.1O3-delta
(2011)
In the present work the effect of cobalt oxide addition on the density and on the electrical properties of gadolinium-doped barium cerate is investigated. A series of BaCe0.9-xGd0.1CoxO3-delta (x = 0.00, 0.01, 0.03, 0.05, ...
Influence of Cu on the properties of gadolinium-doped barium cerate
(2008)
In the present work the effect of copper oxide addition on the densification behavior and electrical conductivity of BaCe1-xGdxO3-delta (BCG) type ceramics is investigated. Small addition (1 mol%) of this sintering additive ...
A thermodynamic analysis of hydrogen production via aqueous phase reforming of glycerol
(2015)
The thermodynamic analysis of glycerol (C3H8O3) aqueous phase reforming (APR) has been performed following the Gibbs free energy minimization method. The effect of the operating parameters, i.e. water to glycerol mass ratio ...