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Interstitial Compounds as Fuel Cell Catalysts: Their Preparative Techniques and Electrochemical Testing.

Akhtar-S; Grein-CT; Bienstock-D
NTIS: PB 198 108 :60 pages
Interstitial compounds of iron, cobalt, and nickel, and their binary and ternary mixtures with silver, gold, palladium, and platinum were prepared and tested as fuel cell catalysts. The first step in the preparation of the interstitial compounds consisted of preparing finely divided metals. This was done either by the raney method or by reduction of precipitated hydoxides of the metals. The finely divided reduced metals were then treated with carbon- and/or nitrogen-containing gases to prepare their carbides, nitrides, and nitrocarbides. The materials were tested for cathodic activity towards o2 and for anodic activity towards h2, c3h8 nh3, CO, and n2h4 in acid and alkaline electrolytes at 25 deg. to 90 deg. C in half-cell assemblies. Samples of carbided and nitrocarbided 1ni-1ag- 1au were about one-fifth as active as pt-black in the reduction of o2 in 35-percent-koh solution whereas the activities of several interstitial preparations exceeded the activity of pt-black in the reduction of o2 in 12m koh containing n2h4. Nitrocarbides of x- fe2c, 3ni-1au, and 1ni-3au were effective catalysts for oxidizing n2h4 in liquid nh3 containing hn4scn. Corrosion of the catalysts by electrolytes was severe in many cases. (Out of print.)
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B 652
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NTIS: PB 198 108
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division