Platinum black catalyst

Yasuda K, Taniguchi A, Akita T, loroi T, Siroma Z. 2006a. Characteristics of a platinum black catalyst layer with regard to platinum dissolution phenomena in a membrane electrode assembly. J Electrochem Soc 153 A1599-A1603. 

Addition of platinum-black catalyst to ethanol caused ignition. Pre-reduction with hydrogen and/or nitrogen purging of air prevented this. 

Tetrahydropyrane has been prepared by hydrogenation of dihydropyrane using a platinum black catalyst 1 by heating pen-tamethylene bromide with water 2 3 or with water and zinc oxide in a sealed tube 4 or by heating pentamethylene glycol with three volumes of 60 per cent sulfuric acid in a pressure tube.5... 

Consequently, the direct use of hydrocarbon gases as fuel is usually considered to be impractical, although Whitesides and co-workers18 describe an aqueous fuel cell in which methane reacts with aqueous iron (III) ions over a platinum black catalyst to form CO2 and iron(II) the Fe2+ solution... 

If the catalytically active particulates can be kept separate from each other thermal agglomeration can be eliminated or, at least, minimized. The most effective way of accomplishing this is to attach the catalyst species to the surface of a thermostable support material as shown in Fig. 9.1c. For comparison, a powdered platinum black catalyst can sinter at temperatures as low as 100°C but a supported catalyst, such as Pt/Al203, does not usually sinter at temperatures under 450-500°C,... 

ETHANOL (64-17-5) CjHjOH Flammable liquid. Forms explosive mixture with air [explosion limits in air (% by volume) 3.3 to 19 flash point 55°F/13°C 68°F/20°C (80%) 72°F/22°C (60%) 79°F/26°C autoignition temp 685°F/363°C Fire Rating 3], Reacts, possibly violently, with strong oxidizers, strong acids bases, strong peroxides acetic anhydride, acetyl bromide, acetyl chloride, aliphatic amines, bromine pentafluoride, calcium oxide (quicklime), cesium oxide, chloryl perchlorate, disulfiiryl difluoride, ethylene glycol methyl ether, iodine heptafluoride, isocyanates, nitrosyl perchlorate, perchlorates, platinum, platinum-black catalyst potassium-tert-butoxide, potassium, potassium oxide, potassium peroxide, potassium superoxide phosphorus (III) oxide, silver nitrate, silver oxide, sulfuric acid, oleum, sodium, sodium hydrazide, sodium peroxide, sulfinyl cyanamide, tetrachlorosilane, s-triazine-... 

METHYL HYDRATE (67-56-1) CH O CH3OH Flammable liquid. Forms explosive mixture with air [explosion limits in air (vol %) 6.0 to 36.5 flash point 52 F/11 C autoignition temp 725°F/385°C 867°F/464°C " Fire Rating 3]. Violent reaction (possible fire and/or explosion) with strong oxidizers strong mineral acids (e.g., nitric, sulfuric, perchloric) acetyl bromide alkyl aluminum salts beryllium dihydride bromine, chromic acid l-chloro-3,3-difluoro-2-methoxycyclopropene, cyanuric chloride diethylzinc, isophthaloyl chloride potassium-ferf-butoxide phosphorus trioxide platinum-black catalyst (ignition) potassium sulfur diimide Raney-nickel catalysts 2,4,6-trichlorotriazine, triethylaluminum, 1,3,3 -trifluor o-2 -... 

RC-10 Pt reduction column Pt-reducing column 10% R on Alumina Platinum-black catalyst... 

Platinum has been widely used for PEMFCs owing to its excellent oxygen reduction catalytic activity. Platinum is usually implemented in the form of Pt/C catalysts because of its significantly higher surface area compared with that of platinum black catalysts. Furthermore, platinum alloy catalysts are also employed to enhance oxygen reduction activities. Pt black, Pt/C, and Pt/C alloys will be discussed in this section. 

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