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

Spezzati, Giulia; Su, Yaqiong; Hofmann, Jan P.; Benavidez, Angelica D.; DeLaRiva, Andrew T.; McCabe, Jay; Datye, Abhaya K.; Hensen, Emiel J. M.

doi:10.1021/acscatal.7b02001

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

Journal Article · Thu Sep 07 00:00:00 EDT 2017 · ACS Catalysis

DOI:https://doi.org/10.1021/acscatal.7b02001· OSTI ID:1414915

Spezzati, Giulia ^[1]; Su, Yaqiong ^[1];

^[1]; Benavidez, Angelica D. ^[2]; DeLaRiva, Andrew T. ^[2]; McCabe, Jay ^[2]; Datye, Abhaya K. ^[2];

^[1]

Eindhoven Univ. of Technology, Eindhoven (The Netherlands)
Univ. of New Mexico, Albuquerque, NM (United States)

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.

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Research Organization:: The Netherlands Organization for Scientific Research (NWO) (The Netherlands); Univ. of New Mexico, Albuquerque, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-05ER15712

OSTI ID:: 1414915

Alternate ID(s):: OSTI ID: 1508266

Journal Information:: ACS Catalysis, Vol. 7, Issue 10; ISSN 2155-5435

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 166 works

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
cerium oxide
CO oxidation
computational modeling
FTIR
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palladium
single site

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

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