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Atomically Dispersed Pd-O Species on CeO2(111) as Highly Active Sites for Low-Temperature CO Oxidation.

ABSTRACT: Ceria-supported Pd is a promising heterogeneous catalyst for CO oxidation relevant to environmental cleanup reactions. Pd loaded onto a nanorod form of ceria exposing predominantly (111) facets is already active at 50 °C. Here we report a combination of CO-FTIR spectroscopy and theoretical calculations that allows assigning different forms of Pd on the CeO2(111) surface during reaction conditions. Single Pd atoms stabilized in the form of PdO and PdO2 in a CO/O2 atmosphere participate in a catalytic cycle involving very low activation barriers for CO oxidation. The presence of single Pd atoms on the Pd/CeO2-nanorod, corroborated by aberration-corrected TEM and CO-FTIR spectroscopy, is considered pivotal to its high CO oxidation activity.

SUBMITTER: Spezzati G

PROVIDER: S-EPMC5634748 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature

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Atomically Dispersed Pd-O Species on CeO2(111) as Highly Active Sites for Low-Temperature CO Oxidation.

Spezzati Giulia G Su Yaqiong Y Hofmann Jan P JP Benavidez Angelica D AD DeLaRiva Andrew T AT McCabe Jay J Datye Abhaya K AK Hensen Emiel J M EJM

ACS catalysis 20170907 10

Ceria-supported Pd is a promising heterogeneous catalyst for CO oxidation relevant to environmental cleanup reactions. Pd loaded onto a nanorod form of ceria exposing predominantly (111) facets is already active at 50 °C. Here we report a combination of CO-FTIR spectroscopy and theoretical calculations that allows assigning different forms of Pd on the CeO2(111) surface during reaction conditions. Single Pd atoms stabilized in the form of PdO and PdO2 in a CO/O2 ...[more]

PMID: 29034121

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Dataset Information

Atomically Dispersed Pd-O Species on CeO2(111) as Highly Active Sites for Low-Temperature CO Oxidation.

Publications

Atomically Dispersed Pd-O Species on CeO<sub>2</sub>(111) as Highly Active Sites for Low-Temperature CO Oxidation.

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