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Published on: August 23, 2018
The Rh-In bimetallic nanoparticle formation regularities: insights from theoretical and experimental studies by XPS
Alexander O Martyanov1, Maxim A Panafidin2, Andrey V Bukhtiyarov2
1Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis, Nikolsky ave. 1, 630559 Kol'tsovo, Russia. a.o.martyanov@srf-skif.ru.
Abstract:
The formation patterns of bimetallic Rh-In nanoparticles deposited on highly oriented pyrolytic graphite (HOPG) have been studied using a combination of scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS) techniques. Indium deposition on a monometallic Rh/HOPG matrix is shown to lead to the formation of bimetallic nanoparticles with a Rhcore-Inshell structure. Subsequent heating of the prepared model Rh-In/HOPG sample at a temperature of 350 °C under ultra-high vacuum conditions led to a uniform metal distribution throughout the volume of the nanoparticles. In addition, the surface morphology of the Rh-In/HOPG catalyst and the structure of the bimetallic nanoparticles were theoretically modeled based on experimental XPS and STM data.
