Room-temperature carbon monoxide oxidation by oxygen over Pt/Al2O3 mediated by reactive platinum carbonates

Mark A. Newton (), Davide Ferri, Grigory Smolentsev, Valentina Marchionni and Maarten Nachtegaal
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Mark A. Newton: University of Warwick
Davide Ferri: Paul Scherrer Institut
Grigory Smolentsev: Paul Scherrer Institut
Valentina Marchionni: Paul Scherrer Institut
Maarten Nachtegaal: Paul Scherrer Institut

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract Room-temperature carbon monoxide oxidation, important for maintaining clean air among other applications, is challenging even after a century of research into carbon monoxide oxidation. Here we report using time-resolved diffuse reflectance infrared spectroscopy, X-ray absorption fine structure spectroscopy and mass spectrometry a platinum carbonate-mediated mechanism for the room-temperature oxidation of carbon monoxide. By applying a periodic reduction–oxidation mode of operation we further show that this behaviour is reversible and can be formed into a catalytic cycle that requires molecular communication between metallic platinum nanoparticles and highly dispersed oxidic platinum centres. A new possibility for the attainment of low-temperature oxidation of carbon monoxide is therefore demonstrated.

Date: 2015
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DOI: 10.1038/ncomms9675

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