PtNi supported on oxygen functionalized carbon nanotubes: In depth structural characterization and activity for methanol electrooxidation

- PtNi catalysts supported on CNTs have been prepared by a polyol synthesis.
- Multi-technique approach revealed inhomogeneous element distribution in particles.
- Pt is enriched in outer particle layers while Ni aggregates close to support.
- Heat treatment leads to further Pt segregation and lower MeOH oxidation activity.