Nanofabricated catalyst particles for the investigation of catalytic carbon oxidation by oxygen spillover
Journal article, 2017

The catalytic oxidation of carbon by molecular oxygen was studied using C/Pt, Pt/C, Pt/Al2O3/C, Pt/CeO2/C, Al2O3/C and CeO2/C model samples prepared by hole-mask colloidal lithography. By this technique the degree of contact between platinum and carbon was controlled with high precision. The oxidation of carbon was monitored using atomic force microscopy and scanning electron microscopy. The results show that Pt in direct contact with carbon catalyzes the oxidation of carbon by spillover of dissociated oxygen from Pt to carbon. By physically separating Pt and carbon with a 10 nm thin spacer layer of Al2O3, the oxygen spillover was entirely blocked. However, through a corresponding spacer layer of CeO2, carbon oxidation was still observed, either by oxygen spillover from Pt to carbon or directly dissociated on the ceria, although at a slower rate compared to the case with no spacer layer between Pt and carbon.

Author

Carl Justin Kamp

Chalmers, Chemistry and Chemical Engineering

Competence Centre for Catalysis (KCK)

Héctor Hugo Pérez Garza

Competence Centre for Catalysis (KCK)

Chalmers, Physics

Hans Fredriksson

Competence Centre for Catalysis (KCK)

Chalmers, Physics

Bengt Herbert Kasemo

Chalmers, Physics

Competence Centre for Catalysis (KCK)

Bengt Andersson

Competence Centre for Catalysis (KCK)

Chalmers, Chemistry and Chemical Engineering, Chemical Technology, Chemical Reaction Engineering

Magnus Skoglundh

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Applied Surface Chemistry

Competence Centre for Catalysis (KCK)

Langmuir

07437463 (ISSN) 15205827 (eISSN)

Vol. 33 20 4903-4912

Driving Forces

Sustainable development

Innovation and entrepreneurship

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Transport

Energy

Materials Science

Subject Categories

Chemical Process Engineering

Atom and Molecular Physics and Optics

Materials Chemistry

Roots

Basic sciences

DOI

10.1021/acs.langmuir.6b04139

PubMed

28426229

More information

Created

10/7/2017