Nanoparticle

Chemistry

Materials science

Photochemistry

Engineering

Nanotechnology

Polymer chemistry

Dendrimer

Inorganic chemistry

Chemical engineering

ACS Nano

In this paper, we show that the onset potential for CO oxidation electrocatalyzed by ∼2 nm dendrimer-encapsulated Pt nanoparticles (Pt DENs) is shifted negative by ∼300 mV in the presence of a small percentage (<2%) of Cu surface atoms. Theory and experiments suggest that the catalytic enhancement arises from a cocatalytic Langmuir-Hinshelwood mechanism in which the small number of Cu atoms selectively adsorb OH, thereby facilitating reaction with CO adsorbed to the dominant Pt surface. Theory suggests that these Cu atoms are present primarily on the (100) facets of the Pt DENs.

Efficient CO Oxidation Using Dendrimer-Encapsulated Pt Nanoparticles Activated with &lt;2% Cu Surface Atoms

Efficient CO Oxidation Using Dendrimer-Encapsulated Pt Nanoparticles Activated with &lt;2% Cu Surface Atoms

Efficient CO Oxidation Using Dendrimer-Encapsulated Pt Nanoparticles Activated with <2% Cu Surface Atoms