Output details
13 - Electrical and Electronic Engineering, Metallurgy and Materials
University of Oxford
A model for oxidation-driven surface segregation and transport on Pt-alloys studied by atom probe tomography
This work represents the current best available understanding of surface diffusion on a metal alloy surface exposed to reactive environments, closely simulating the exposure conditions and surface structure of real catalytic systems. It revealed that the commonly accepted models of surface segregation behaviour in Pt-Rh alloys seen using conventional surface science techniques were not correct on different regions of a stepped alloy surface, and suggesting the possibility of tailoring different surfaces/conditions to create unique catalytic surfaces. This key concept has been recently taken up by a Rossendorf/Berkeley experimental group using in-situ XPS to identify similar behaviour on Pd-Rh.
