Mechanistic Aspects of Wet and Dry CO Oxidation on CoO Nanorod Surfaces: A NAP-UPS Study.

ACS Omega

Catalysis Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India.

Published: March 2017

Catalytic activity, electronic structure, and the mechanistic aspects of CoO nanorod (NR) surfaces have been explored for CO oxidation in dry and wet atmosphere using near-ambient pressure ultraviolet photoelectron spectroscopy. Presence of water with CO + O plummets the catalytic activity because of the change in the electronic nature from predominantly oxide (without water in feed) to a CoO surface covered by a few intermediates. However, at ≥375 K, the CoO surface recovers and regains the oxidation activity, at least partially, even in the presence of water. This is fully supported by the changes observed in the work function of CoO under wet (HO + CO + O) conditions compared with dry (CO + O) conditions. This study focuses on the comparative CO oxidation rate on CoO NR surfaces and highlights the changes in the electronic structure that occur in the catalyst during the CO oxidation reaction.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6641056PMC
http://dx.doi.org/10.1021/acsomega.6b00471DOI Listing

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