Room-Temperature CO Oxidation Catalyst: Low-Temperature Metal–Support Interaction between Platinum Nanoparticles and Nanosized Ceria | Zendy

Suresh Gatla | Zendy; Daniel Aubert | Zendy; Giovanni Agostini | Zendy; Olivier Mathon | Zendy; S. Pascarelli | Zendy; Thomas Lunkenbein | Zendy; MarcGeorg Willinger | Zendy; Helena Kaper | Zendy

Open Access

Room-Temperature CO Oxidation Catalyst: Low-Temperature Metal–Support Interaction between Platinum Nanoparticles and Nanosized Ceria

Author(s) -

Suresh Gatla,

Daniel Aubert,

Giovanni Agostini,

Olivier Mathon,

S. Pascarelli,

Thomas Lunkenbein,

MarcGeorg Willinger,

Helena Kaper

Publication year - 2016

Publication title -

acs catalysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 4.898

H-Index - 198

ISSN - 2155-5435

DOI - 10.1021/acscatal.6b00677

Subject(s) - platinum , catalysis , nanoparticle , platinum nanoparticles , materials science , metal , chemical engineering , nanotechnology , chemistry , metallurgy , organic chemistry , engineering

International audiencePlatinum nanoparticles dispersed on nanosized ceria areactive for CO oxidation at room temperature after hydrogen pretreatment.High angular annular dark field scanning transmission electron microscopy(HAADF-STEM) analysis of the reduced catalyst shows spreading of the 1nm sized platinum particles under the electron beam, characteristic for atwo-dimensional strong metal−support interaction. In situ X-ray absorptionfluorescence spectroscopy (XAFS) reveals a Pt−O distance of 2.1 Å, whichis significantly longer than the Pt−O distance in PtO2 (2.0 Å). Thiselongated Pt−O distance can be related to interaction of the platinumspecies with cerium oxide in the form of a low-temperature active species−support interaction. These findings contribute to the general understandingof catalytic systems operating at low temperature

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