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Tuning Pt-CeO2 interactions by high-temperature vapor-phase synthesis for improved reducibility of lattice oxygen

Journal Article · · Nature Communications
 [1];  [2];  [3];  [2];  [2];  [1];  [4];  [4];  [3];  [5];  [2]
  1. Washington State Univ., Pullman, WA (United States)
  2. Univ. of New Mexico, Albuquerque, NM (United States)
  3. Eindhoven Univ. of Technology, Eindhoven (The Netherlands)
  4. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  5. Washington State Univ., Pullman, WA (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
In this work, we compare the CO oxidation performance of Pt single atom catalysts (SACs) prepared via two methods: (1) conventional wet chemical synthesis (strong electrostatic adsorption–SEA) with calcination at 350 °C in air; and (2) high temperature vapor phase synthesis (atom trapping–AT) with calcination in air at 800 °C leading to ionic Pt being trapped on the CeO2 in a thermally stable form. As-synthesized, both SACs are inactive for low temperature (<150 °C) CO oxidation. After treatment in CO at 275 °C, both catalysts show enhanced reactivity. Despite similar Pt metal particle size, the AT catalyst is significantly more active, with onset of CO oxidation near room temperature. A combination of near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) and CO temperature-programmed reduction (CO-TPR) shows that the high reactivity at low temperatures can be related to the improved reducibility of lattice oxygen on the CeO2 support.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1507543
Report Number(s):
PNNL-SA--132985
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 10; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (11)

One‐Pot Cooperation of Single‐Atom Rh and Ru Solid Catalysts for a Selective Tandem Olefin Isomerization‐Hydrosilylation Process journal February 2020
One‐Pot Cooperation of Single‐Atom Rh and Ru Solid Catalysts for a Selective Tandem Olefin Isomerization‐Hydrosilylation Process journal February 2020
Origin of the High CO Oxidation Activity on CeO 2 Supported Pt Nanoparticles: Weaker Binding of CO or Facile Oxygen Transfer from the Support? journal March 2020
Cerium(III) Nitrate Derived CeO 2 Support Stabilising PtO x Active Species for Room Temperature CO Oxidation journal January 2020
Surpassing the single-atom catalytic activity limit through paired Pt-O-Pt ensemble built from isolated Pt1 atoms journal August 2019
Dynamic charge and oxidation state of Pt/CeO2 single-atom catalysts journal August 2019
The contributions of distinct Pd surface sites in palladium–ceria catalysts to low-temperature CO oxidation journal January 2020
Atomically dispersed platinum on low index and stepped ceria surfaces: phase diagrams and stability analysis journal January 2020
A tailored oxide interface creates dense Pt single-atom catalysts with high catalytic activity journal January 2020
Recent advances in the selective catalytic hydrodeoxygenation of lignin-derived oxygenates to arenes journal January 2020
Promotion of Pt/CeO 2 catalyst by hydrogen treatment for low-temperature CO oxidation journal January 2019

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