在铂/石墨催化剂上通过氮氧化物加氢制备硫酸羟胺 III：合成催化剂时支持物表面的功能化和活性组分的形成

IF 0.7 Q4 ENGINEERING, CHEMICAL Catalysis in Industry Pub Date : 2024-09-18 DOI:10.1134/S2070050424700144

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

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引用次数: 0

摘要

摘要作者揭示了在制备模型（0.5%铂/锡长石）和工业（0.5%铂/石墨）催化剂时，铂纳米颗粒的形成和碳载体表面化学涂层的各个方面，这些催化剂用于在 H2SO4 溶液中氢化 NO 合成硫酸羟胺。研究表明，在沉积铂的同时，用含氮基团对载体表面进行官能化处理，不仅能确保金属的分散，还能大大提高金属对硫酸羟胺的选择性。据推测，最大选择性是活性位点的特征，即与碳表面含氮配体结合的单个原子或小型铂簇。

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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

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.

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来源期刊

Catalysis in Industry ENGINEERING, CHEMICAL-

CiteScore

1.30

自引率

14.30%

发文量

期刊介绍： The journal covers the following topical areas: Analysis of specific industrial catalytic processes: Production and use of catalysts in branches of industry: chemical, petrochemical, oil-refining, pharmaceutical, organic synthesis, fuel-energetic industries, environment protection, biocatalysis; technology of industrial catalytic processes (generalization of practical experience, improvements, and modernization); technology of catalysts production, raw materials and equipment; control of catalysts quality; starting, reduction, passivation, discharge, storage of catalysts; catalytic reactors.Theoretical foundations of industrial catalysis and technologies: Research, studies, and concepts : search for and development of new catalysts and new types of supports, formation of active components, and mechanochemistry in catalysis; comprehensive studies of work-out catalysts and analysis of deactivation mechanisms; studies of the catalytic process at different scale levels (laboratory, pilot plant, industrial); kinetics of industrial and newly developed catalytic processes and development of kinetic models; nonlinear dynamics and nonlinear phenomena in catalysis: multiplicity of stationary states, stepwise changes in regimes, etc. Advances in catalysis: Catalysis and gas chemistry; catalysis and new energy technologies; biocatalysis; nanocatalysis; catalysis and new construction materials.History of the development of industrial catalysis.