Morphology of carbon supported Pt-Ru electrocatalyst and the CO tolerance of anodes for PEM fuel cells

Article Abstract:

Research was conducted to examine the morphology of carbon supported Pt-Ru electrocatalyst and the CO tolerance of anodes for polymer-electrolyte-membrane (PEM) fuel cells. X-ray absorption spectroscopy was used to characterize the platinum-ruthenium microstructures of the two electrocatalysts in the fabricated electrodes. Results reveal the absence of Pt-Ru metal-metal interaction in the commercial catalyst and that only ruthenium oxide signals were evident. It was also observed that the Pt-Ru alloy structure has better CO tolerance than nonalloy Pt-Ru structure.

Platinum, Metals, Carbon monoxide, Polyelectrolytes, Ruthenium, Anodizing

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Effect of the pre-treatment of carbon black supports on the activity of Fe-based electrocatalysts for the reduction of oxygen

Article Abstract:

The activity of Fe-based electrocatalysts increases steadily with the iron content at the lower end of the metal concentration range. This was gleaned from an experiment involving HNO(sub 3)/NH(sub 3) treatments of a carbon support, addition of Fe from inorganic precursors and a thermal treatment at 900 degrees Celsius under an inert atmosphere. Fe-based oxygen reduction electrocatalysts have been synthesized for use in polymer electrolyte fuel cells. Additional Fe ions were found to be adsorbed on the modified carbon black during the synthesis.

Oxygen, Catalysts, Oxidation-reduction reaction, Oxidation-reduction reactions, Iron compounds, Electrolytes, Carbon-black, Carbon black

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EXAFS of carbon monoxide oxidation on supported PT fuel cell electrocatalysts

Article Abstract:

A new X-ray absorption fine structure study of the chemisorption and electro-oxidation of carbon monoxide on supported Pt fuel cell electrocatalysts is presented.

Restaurants, Chemistry, Physical and theoretical, Physical chemistry, Organometallic compounds

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