The oxygen reduction reaction (ORR) activity on the cathode plays a significant role in deciding the overall performance of proton exchange membrane (PEM) fuel cells. Dramatic effort has … Plus…
The oxygen reduction reaction (ORR) activity on the cathode plays a significant role in deciding the overall performance of proton exchange membrane (PEM) fuel cells. Dramatic effort has been devoted to the attempt to enhance the catalytic activity and reduce the overpotential caused by the irreversible oxygen reduction reaction on the cathode side of PEM fuel cell. To reduce the electrode overpotential and increase cell performance, the exploration of new catalytic materials as substitutes for the traditionally preferred platinum-only catalyst has been extensively carried out in recent decades. Appling transition metal modified Pt bimetal electrocatalyst instead of Pt is one of the main approaches for this purpose.;The objectives of this research are to identify potential Pt-modified electrocatalysts for the cathode in hydrogen and methanol PEM fuel cells and provide better understanding of the promoting effect of the synthesized electrocatalysts as a function of material atomic ratio, particle distribution and alloying composition. The physical properties and ORR activity of carbon supported PtFe and PtCr electrocatalysts were studied extensively. All the electrocatalysts were prepared by colloidal method and subsequent catalytic properties and performance were studied. Catalyst surface area was determined by BET nitrogen adsorption and electrochemical methods. Particle size and their distribution were studied by transmission electron microscopy (TEM). X-ray diffraction characterization (XRD) measurements were conducted to determine the crystallite structure. Electrocatalyst activity was evaluated by rotating disc electrode (RDE) and single cell measurements.;It can be concluded from the experiment results that PtFe/C and PtCr/C electrocalysts could be better replacements for conventional Pt/C as the cathode of PEM fuel cell. The Pt9Fe1/C and Pt4Cr 1/C gave the best catalytic activity which was demonstrated both on RDE and single cell measurements. For H2 PEM Textbooks New Books ~~ Technology~~ General Synthesis-characterization-and-performance-testing-of-platinum-based-electrocatalysts-for-low-temperature-PEM-fuel-cells~~Yanming-Gong BiblioLabsII<
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The oxygen reduction reaction (ORR) activity on the cathode plays a significant role in deciding the overall performance of proton exchange membrane (PEM) fuel cells. Dramatic effort has … Plus…
The oxygen reduction reaction (ORR) activity on the cathode plays a significant role in deciding the overall performance of proton exchange membrane (PEM) fuel cells. Dramatic effort has been devoted to the attempt to enhance the catalytic activity and reduce the overpotential caused by the irreversible oxygen reduction reaction on the cathode side of PEM fuel cell. To reduce the electrode overpotential and increase cell performance, the exploration of new catalytic materials as substitutes for the traditionally preferred platinum-only catalyst has been extensively carried out in recent decades. Appling transition metal modified Pt bimetal electrocatalyst instead of Pt is one of the main approaches for this purpose.;The objectives of this research are to identify potential Pt-modified electrocatalysts for the cathode in hydrogen and methanol PEM fuel cells and provide better understanding of the promoting effect of the synthesized electrocatalysts as a function of material atomic ratio, particle distribution and alloying composition. The physical properties and ORR activity of carbon supported PtFe and PtCr electrocatalysts were studied extensively. All the electrocatalysts were prepared by colloidal method and subsequent catalytic properties and performance were studied. Catalyst surface area was determined by BET nitrogen adsorption and electrochemical methods. Particle size and their distribution were studied by transmission electron microscopy (TEM). X-ray diffraction characterization (XRD) measurements were conducted to determine the crystallite structure. Electrocatalyst activity was evaluated by rotating disc electrode (RDE) and single cell measurements.;It can be concluded from the experiment results that PtFe/C and PtCr/C electrocalysts could be better replacements for conventional Pt/C as the cathode of PEM fuel cell. The Pt9Fe1/C and Pt4Cr 1/C gave the best catalytic activity which was demonstrated both on RDE and single cell measurements. For H2 PEM Textbooks New Books ~~ Technology~~ General Synthesis-characterization-and-performance-testing-of-platinum-based-electrocatalysts-for-low-temperature-PEM-fuel-cells~~Yanming-Gong BiblioLabsII<
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Informations détaillées sur le livre - Synthesis, characterization and performance testing of platinum-based electrocatalysts for low temperature PEM fuel cells.
Livre dans la base de données depuis 2014-10-09T08:49:11+02:00 (Zurich) Page de détail modifiée en dernier sur 2015-03-21T06:33:33+01:00 (Zurich) ISBN/EAN: 9781243560636
