Journal ArticleDOI
Oxygen Reduction on Oxide‐Free Platinum in 85%Orthophosphoric Acid: Temperature and Impurity Dependence
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In this article, the authors studied the mechanism of reaction in 85% orthophosphoric acid as a function of temperature and impurity level in the electrolyte, and showed that the rate constants and Tafel slopes are dependent on impurity adsorption.Abstract:
Oxygen electrode kinetics in 85% orthophosphoric acid have been studied as a function of temperature and impurity level in the electrolyte. It is shown that the mechanism of reaction is the same as that in N perchloric acid, and that rate constants and Tafel slopes are dependent on impurity adsorption. Hydrogen peroxide is not a significant reaction product, at least at high temperatures. The activation energy of the reaction at the reversible potential was determined to beread more
Citations
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Modeling transport in polymer-electrolyte fuel cells.
Adam Z. Weber,John Newman +1 more
TL;DR: This review has highlighted the important effects that should be modeled and shown the vast complexities of transport within polymer-electrolyte fuel cells and the various ways they have been and can be modeled.
Journal ArticleDOI
Effects of Microporous Layers in Polymer Electrolyte Fuel Cells
Adam Z. Weber,John Newman +1 more
TL;DR: In this paper, the effects of microporous layers in polymer electrolyte fuel cells are investigated. And the authors show that the effect of a micro-layer is to keep water out of the cathode gas diffusion layer and move it through the anode.
Journal ArticleDOI
A Critical Review of Modeling Transport Phenomena in Polymer-Electrolyte Fuel Cells
Adam Z. Weber,Rodney L. Borup,Robert M. Darling,Prodip K. Das,Thomas J. Dursch,Thomas J. Dursch,Wenbin Gu,David Harvey,David Harvey,Ahmet Kusoglu,Shawn Litster,Matthew M. Mench,Rangachary Mukundan,Jon P. Owejan,Jon G. Pharoah,Marc Secanell,Iryna V. Zenyuk +16 more
TL;DR: In this paper, the authors present the results of a study at the Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA and the United Technologies Research Center, East Hartford, Connecticut 06118, USA.
Journal ArticleDOI
Determination of Catalyst Unique Parameters for the Oxygen Reduction Reaction in a PEMFC
TL;DR: In this paper, the oxygen reduction reaction (ORR) kinetics of a high surface-area carbon-supported platinum catalyst (Pt/C) were measured in an operating proton exchange membrane fuel cell (PEMFC).
Journal ArticleDOI
Particle size and structural effects in platinum electrocatalysis
TL;DR: In this paper, the structural and particle size effect on electrocatalysis is examined from the point of view of anodic hydrogen oxidation and cathodic oxygen reduction reactions, and a general idea on the correlations between surface microstructure and geometric model is presented, indicators of a direct correlation between particle size and catalyst support synergism are considered.
References
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Journal ArticleDOI
Reference Electrodes: Theory and Practice
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