再论反应机理：丙烯在负载型钯催化剂上的氧化

IF 3.9 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2025-04-28 DOI:10.1021/acs.langmuir.5c01016

Hitoshi Mikami, Hiroto Tsuchiya, Nobutaka Maeda

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引用次数: 0

摘要

要实现汽车尾气中碳氢化合物的完全氧化，需要对反应机理有深入的了解。利用原位漫反射红外傅立叶变换光谱（DRIFTS）结合瞬态方法，即调制激发光谱，研究了C3H6在Pd/ La-Al2O3上的催化氧化反应。常规的稳态漂移研究表明，表面甲酸酯和乙酸酯物质的形成被认为是反应的中间物质。然而，MES-DRIFTS推翻了先前认为的机制，并提出了新发现的酰基物种作为潜在的中间物种的参与。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Reaction Mechanism Revisited: Oxidation of Propylene on a Supported Palladium Catalyst

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Reaction Mechanism Revisited: Oxidation of Propylene on a Supported Palladium Catalyst

Achieving the complete oxidation of hydrocarbons in automobile exhaust requires a firm understanding of the reaction mechanisms. We investigated catalytic oxidation of C₃H₆ on Pd/La–Al₂O₃ as a model reaction using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) in combination with a transient method, i.e., modulation excitation spectroscopy. A conventional steady-state DRIFTS study demonstrated the formation of surface formate and acetate species, which have been considered to be reaction intermediate species. However, MES-DRIFTS overturned the previously considered mechanism and suggested an involvement of newly discovered acyl species as a potential intermediate species.

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).