Supported mononuclear carbonyl ruthenate as a catalyst for gas-phase ammonia synthesis. Effect of short-term exposure of the catalyst to airстатьяИсследовательская статьяПеревод
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Аннотация:The catalyst for ammonia synthesis from dinitrogen and dihydrogen based on mononuclear potassium carbonyl ruthenate K2[Ru(CO)4] (precursor of catalytically active species) deposited on graphite-like carbon Sibunit exhibits an interesting feature when promoted with metallic potassium and BunLi. Namely, the activity of the catalyst based on K2[Ru(CO)4]/Sibunit noticeably increases after thermal removal of CO ligands followed by short-term exposure to air compared to the activity of the standard K2[Ru(CO)4]/Sibunit sample not exposed to air. Unlike the latter, the air-exposed catalyst simultaneously promoted with both metallic potassium and BunLi becomes much more effi cient than the air-exposed catalyst promoted with metallic potassium only.