Preparing Hydroxylamine Sulfate via the Hydrogenation of NO on Pt/Graphite Catalysts III: Functionalizing the Surfaces of Supports and the Formation of the Active Component when Synthesizing the Catalyst

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发表日期：

2024年9月18日

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P. A. Simonov,
A. N. Bobrovskaya,
V. A. Bobrin,
R. I. Kvon,
A. V. Bukhtiyarov,
N. A. Rudina,
A. V. Romanenko

摘要

Abstract

The authors reveal aspects of the formation of platinum nanoparticles and chemical coating of carbon support surfaces when preparing model (0.5%Pt/Sibunite) and industrial (0.5%Pt/Graphite) catalysts for synthesizing hydroxylamine sulfate via the hydrogenation of NO in a solution of H₂SO₄. It is shown that functionalizing the surfaces of supports with nitrogen-containing groups while depositing platinum ensures not only the dispersion of metal but a strong increase in its selectivity toward hydroxylamine sulfate. It is assumed that maximum selectivity is characteristic of active sites being single atoms or small platinum clusters bound to the nitrogen-containing ligands of a carbon surface.