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Title: Effect of platinum particle size on the oxygen reduction reaction on 2% Pt-1% H{sub 2}WO{sub 4} in phosphoric acid

Abstract

A 2% Pt-1% H{sub 2}WO{sub 4}-based electrocatalyst has been fabricated by an inexpensive chemical route for use as an oxygen cathode in 99% phosphoric acid at 180C. The effect of the platinum particle size on the electrode performance for the oxygen reduction reaction (ORR) was studied. The electrocatalytic properties for the ORR, e.g., exchange current density, mass activity, and specific activity of a 2% Pt-1% H{sub 2} WO{sub 4}-based electrode fabricated from 5% pt, were found to be several times higher than those of 10% Pt-based electrocatalysts. It was shown that the performance of this electrode is not related to an increase in its electrochemically active surface area, but to its chemical composition. Based on the concept of synergistic process of the ORR on materials the authors have previously emphasized, it is shown that a 2% Pt-1% H{sub 2} WO{sub 4}-based electrocatalyst is a synergistic system due to an increase of the active sites at the electrocatalyst surface.

Authors:
;  [1]
  1. Ecole Polytechnique, Montreal, Quebec (Canada). Lab. d`Electrochimie et de Materianx Energetiques
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
276636
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of the Electrochemical Society; Journal Volume: 143; Journal Issue: 6; Other Information: PBD: Jun 1996
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; ACID ELECTROLYTE FUEL CELLS; CATHODES; PERFORMANCE; PLATINUM; PARTICLE SIZE; ELECTROCATALYSTS; TUNGSTEN OXIDES; CATALYST SUPPORTS

Citation Formats

Savadogo, and Essalik, A. Effect of platinum particle size on the oxygen reduction reaction on 2% Pt-1% H{sub 2}WO{sub 4} in phosphoric acid. United States: N. p., 1996. Web. doi:10.1149/1.1836909.
Savadogo, & Essalik, A. Effect of platinum particle size on the oxygen reduction reaction on 2% Pt-1% H{sub 2}WO{sub 4} in phosphoric acid. United States. doi:10.1149/1.1836909.
Savadogo, and Essalik, A. Sat . "Effect of platinum particle size on the oxygen reduction reaction on 2% Pt-1% H{sub 2}WO{sub 4} in phosphoric acid". United States. doi:10.1149/1.1836909.
@article{osti_276636,
title = {Effect of platinum particle size on the oxygen reduction reaction on 2% Pt-1% H{sub 2}WO{sub 4} in phosphoric acid},
author = {Savadogo and Essalik, A.},
abstractNote = {A 2% Pt-1% H{sub 2}WO{sub 4}-based electrocatalyst has been fabricated by an inexpensive chemical route for use as an oxygen cathode in 99% phosphoric acid at 180C. The effect of the platinum particle size on the electrode performance for the oxygen reduction reaction (ORR) was studied. The electrocatalytic properties for the ORR, e.g., exchange current density, mass activity, and specific activity of a 2% Pt-1% H{sub 2} WO{sub 4}-based electrode fabricated from 5% pt, were found to be several times higher than those of 10% Pt-based electrocatalysts. It was shown that the performance of this electrode is not related to an increase in its electrochemically active surface area, but to its chemical composition. Based on the concept of synergistic process of the ORR on materials the authors have previously emphasized, it is shown that a 2% Pt-1% H{sub 2} WO{sub 4}-based electrocatalyst is a synergistic system due to an increase of the active sites at the electrocatalyst surface.},
doi = {10.1149/1.1836909},
journal = {Journal of the Electrochemical Society},
number = 6,
volume = 143,
place = {United States},
year = {Sat Jun 01 00:00:00 EDT 1996},
month = {Sat Jun 01 00:00:00 EDT 1996}
}