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Platinum-substitute Materials as Electrocatalysts for Oxygen Reduction.
Cathey-WN; Nicks-LJ; Bauer-DJ
NTIS: PB 297 261 :17 pages
Many materials including carbides, silicides, phosphides, borides, nitrides, oxides, and metals were studied by the Bureau of Mines as potential fuel cell catalysts for electroreduction of oxygen in a 1n h2so4 electrolyte. The objective of this study was to assess the potential of abundant, low-cost materials as substitutes for platinum or to increase the catalytic efficiency of platinum. Several compounds were rejected because of their reaction in the corrosive environment of the oxygen electrode. However, some of the remaining were the most active catalysts. Activity of carbides such as tungsten carbide could be improved by doping with platinum-group metals, by varying stoichiometry, or by sputtering on a layer of platinum. While no catalysts were found with activity as high as platinum, some compounds were shown to be deserving of further investigation.
IH; Report of Investigation;
NTIS Accession No.
NTIS: PB 297 261
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division