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The Pt3Ni(111) alloy is characterized by the presence of an outermost surface layer only composed by Pt atoms, that is, the so-called Pt skin, which is at the basis of its outstanding performances in oxygen reduction reaction. The growth of graphene on this alloy is further motivated by the realization of a charge-neutral Gr/metal gate, which can be replaced by a p-doped Gr/oxide/metal configuration upon heating in an oxygen environment. Herein, we have followed the complete reaction pathway starting with adsorbed hydrocarbons and ending with the large-scale growth of a graphene overlayer. Experiments using temperature-programmed X-ray photoelectron spectroscopy have been carried out for different conditions (C2H4 dose and sample temperature). Submonolayer graphene (0.08 ML) is reached upon heating at T = 1000 K an ethene monolayer dosed at T = 80 K. Conversely, monolayer graphene domains …
American Chemical Society
Publication date: 
22 Feb 2018

Antonio Politano, Lin Wang, Gennaro Chiarello

Biblio References: 
Volume: 122 Issue: 7 Pages: 3885-3892
The Journal of Physical Chemistry C