Abstract

The interaction of palladium nanoparticles (average size, ∼3 nm) deposited on the surface of highly oriented pyrolytic graphite (HOPG) with nitrogen dioxide at room temperature and a pressure of 10^–6 or 10^–5 mbar was studied by X-ray photoelectron spectroscopy (XPS). It was shown that the structure of several surface graphene layers was destroyed under these conditions due to the oxidation of carbon at the interface between Pd and HOPG. The reaction proceeded with the participation of oxygen atoms, which were formed as a result of the dissociation of NO₂ molecules on the palladium surface. Palladium particles retained their metallic nature, but they penetrated deep into graphite in this case.

中文翻译：

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负载钯颗粒存在下二氧化氮对高取向热解石墨（HOPG）表面的室温氧化

摘要

通过X射线光电子研究了室温下沉积在高度取向的热解石墨（HOPG）表面上的钯纳米粒子（HOPG）与二氧化氮之间的相互作用，其中二氧化氮在室温下为10 ^–6或10 ^–5 mbar。光谱（XPS）。结果表明，在这些条件下，由于Pd和HOPG之间的界面处的碳被氧化，几个表面石墨烯层的结构被破坏。反应在氧原子的参与下进行，该氧原子是由于钯表面上的NO ₂分子解离而形成的。钯粒子保留了其金属性质，但是在这种情况下，它们会深入石墨。