Ostwald Process (Step 1: Ammonia Oxidation)

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$$4NH_3 + 5O_2 \xrightarrow{\mathrm{Pt-Rh\ gauze},\,900\;\mathrm{K},\,8\;\mathrm{atm}} 4NO + 6H_2O$$

Ammonia is oxidized to nitric oxide over a platinum–rhodium gauze catalyst at approximately 900 K and 8 atm.

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