Platinum carbonate is a catalyst material used in synthetic chemistry. It is a useful tool in the production of fuel cells and other applications.
The metal has a grayish white appearance that is highly resistant to corrosion. It is also non-reactive and does not oxidize in air at any temperature.
It is also an excellent “green” filler in building materials where recycling credits are desirable. It is available in a variety of loading percentages and is produced to Mil Spec (military grade), ACS, Reagent, Technical Grade, Food, Agricultural and Pharmaceutical Grade, and Optical Grade specifications.
A method of directly converting potassium chloroplatinite or ammonium chloroplatinite into tetraammineplatinum hydrogen carbonate is presented that saves the step of Magrou salt and reduces processing time significantly. The content of chlorine ions in the product is effectively controlled to be within 100 ppm.
Re-oxidation of the Pt precursor sites is a rate-limiting step in this chemistry and requires Pt nanoparticles that can facilitate O2 dissociation and oxygen transfer to these sites. The presence of a small fraction of reduced metallic Pt nanoparticles in the sample has been verified by high-angle annular dark-field scanning transmission electron microscopy (TEM, Supplementary Fig. 6).
The catalytic oxidation of CO by O2 over metallic Pt surfaces is one of the oldest and most industrially important heterogeneous catalytic conversions1,2,3,4,5. However, Pt has a limited capacity to re-oxidize at room temperature and this limits the overall efficiency of this chemistry.
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