Nanofabricated catalyst particles for the investigation of catalytic carbon oxidation by oxygen spillover
Artikel i vetenskaplig tidskrift, 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.

Författare

Carl Justin Kamp

Chalmers, Kemi och kemiteknik

Kompetenscentrum katalys (KCK)

Héctor Hugo Pérez Garza

Kompetenscentrum katalys (KCK)

Chalmers, Fysik

Hans Fredriksson

Kompetenscentrum katalys (KCK)

Chalmers, Fysik

Bengt Herbert Kasemo

Chalmers, Fysik

Kompetenscentrum katalys (KCK)

Bengt Andersson

Kompetenscentrum katalys (KCK)

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk reaktionsteknik

Magnus Skoglundh

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

Kompetenscentrum katalys (KCK)

Langmuir

0743-7463 (ISSN) 1520-5827 (eISSN)

Vol. 33 20 4903-4912

Drivkrafter

Hållbar utveckling

Innovation och entreprenörskap

Styrkeområden

Nanovetenskap och nanoteknik

Transport

Energi

Materialvetenskap

Ämneskategorier

Kemiska processer

Atom- och molekylfysik och optik

Materialkemi

Fundament

Grundläggande vetenskaper

DOI

10.1021/acs.langmuir.6b04139

PubMed

28426229