Graphene Growth on Pt(111) by Ethylene Chemical Vapor Deposition at Surface Temperatures near 1000 K

Abstract

The nucleation and growth of graphene islands on a Pt(111) surface were examined at temperatures near 1000 K. Graphene was grown by chemical vapor deposition of ethylene and a low-energy electron microscope (LEEM) was used to image the growing graphene islands with resolution of 10 nm and to perform spatially-localized electron diffraction. It is shown that graphene grows bi-directionally over the step edges of Pt and its formation can induce substantial changes in the platinum surface morphology. Average size and density of graphene islands strongly depends on surface temperature during deposition. Post-dosing Auger electron spectroscopy was employed as a complimentary macroscopic technique to measure the total carbon deposited as a result of ethylene dissociative sticking and decomposition. The initial dissociative sticking coefficient 0 ( 300 K, ) g s S T T = for ethylene was found to decrease with increasing surface temperature until a temperature of s T = 850 K was reached whereupon it increased with temperature.

Probing interlayer interactions between graphene and metal substrates by supersonic rare-gas atom scattering

“…The results of rare-gas scattering from these graphenes are compared to that from HOPG, which serves as a reference for nearly freestanding graphene supported by the van der Waals interaction. Graphene on Pt(111) is known as the model of nearly freestanding graphene [14][15][16][17][18][19][20][21]. Density functional theory (DFT) calculations have shown that the graphene-substrate distance of gr/Pt(111) is approximately 3.3Å, which is nearly the same as the 3.354Å interlayer distance in HOPG [14,[18][19][20].…”

Low-temperature synthesis of sp2 carbon nanomaterials

“…Choosing different catalysts is capable to change the reactivity, reduce the reaction barrier and meanwhile tune the reaction path and selectivity towards precursors. Up to now, many transition metal and noble metal catalysts have been used to promote the decomposition of carbon sources and the later nucleation and growth, including Ni [17,60], Cu [25,61], Fe [62,63], Co [64,65] and Pt [66,67]. In the initial stage, precursor molecules can be decomposed into carbon radicals on the surface of the catalyst, then diffuse over the surface of the catalyst or dissolve into the catalyst.…”

Graphene‐mesoporous anatase TiO2 nanocomposite: A highly efficient and recyclable heterogeneous catalyst for one‐pot multicomponent synthesis of benzodiazepine derivatives

“…As much as now, there are plentiful research articles are explaining graphene based inorganic nanocomposites for various types of catalyst activity. To illustrate, graphene nanocomposite with noble metals such as (Ag, Au, Pt, Pd) are employed as a catalyst for hydrogenation reaction and oxygen reduction reaction . Furthermore, metal oxide like MoS 2 , Co 3 O 4 , ZnO, Fe 3 O 4 , SiO 2 , and CoFe 2 O 4 are used as an effective photocatalyst in the photodegradation of organic pollutant and hydrogen evolution in water splitting …”