Structure evolution of Ni ultrathin films on Pt()

Carbon Monoxide Adsorption on Cobalt-Deposited Platinum Single Crystal Surfaces Investigated by IR Reflection-Absorption and Low-Energy Electron Diffraction

“…As for the Co/Pt(111) bimetallic surfaces published to date, small hexagons of satellites are emerged in the LEED patterns [27,[33][34][35]: the authors concluded that the deposited Co grows in incoherent epitaxy at a room temperature substrate. Similar sub-spots around the original integer beam have been reported for large lattice mismatch bimetallic systems such as Ni/Pt(111) [36] and Pt/Ni(111) [37]. Furthermore, one might notice that with increasing the thicknesses the LEED spot distances decrease.…”

Effect of hydrocarbon chain length and cyclization on the adsorption strength of unsaturated hydrocarbons on Pt/3d bimetallic surfaces

“…When the temperature of the Pt(1 1 1) surface is maintained at 300 K during deposition, the 3d metal remains on the surface. On the other hand, if the crystal temperature is elevated to 600 K during deposition, the 3d metal starts to diffuse, resulting in the first atomic layer being enriched in Pt and the second atomic layer consisting of predominantly the 3d metal [37][38][39][40][41][42][43][44][45]. This was previously demonstrated for Ni/Pt(1 1 1) and the Co/Pt(1 1 1) bimetallic surfaces.…”

Alloy formation of Co/Ni/Pt(111)

“…Due to the sensitivity of Auger electrons, we did not observe any significant changes for the Co 656 eV and Ni 848 eV Auger signals between 420 K and 580 K. As the temperature exceeds 650 K, the drops of Ni 848 eV and Co 656 eV signals indicate that the bulk diffusions for Co and Ni occur because of high-energy Auger electrons come from the deep layers. According to recent studies about the alloy formation of Co-Pt [12] and Ni-Pt [9] interfaces, these drops can be confirmed as the alloy formation of Co-Pt and Ni-Pt. The formation of Ni-Co-Pt alloy is also possible in the subsurface region.…”