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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Stabilization of atomically dispersed rhodium sites on ceria-based supports under reaction conditions probed by in situ infrared spectroscopy

Full text
Author(s):
Vieira, Luiz H. [1] ; Assaf, Jose M. [2] ; Assaf, Elisabete M. [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Sao Carlos Inst Chem, Av Trabalhador Sao Carlense 400, BR-13560970 Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, Rod W Luiz, Km 235, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Materials Letters; v. 277, OCT 15 2020.
Web of Science Citations: 0
Abstract

In this work, atomically dispersed rhodium over co-precipitated ceria-based supports were prepared by wet impregnation. The structural and surface properties of materials were investigated by X-ray diffraction, N-2 physisorption isotherms, and X-ray photoelectron spectroscopy. The fraction of isolated sites was quantified by infrared spectroscopy using CO as a probe molecule. The formation of a defective surface by incorporation of 15% (mol/mol) of zirconium on ceria structure increased similar to 5-fold the fraction of isolated sites on catalyst compared to unmodified ceria. The doped-support efficiently trapped rhodium atoms avoiding agglomeration and increasing stability during CO oxidation reaction in a wide range of temperatures (30-200 degrees C) when compared to single-sites deposited on silica. (C) 2020 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 14/50279-4 - Brasil Research Centre for Gas Innovation
Grantee:Julio Romano Meneghini
Support type: Research Grants - Research Centers in Engineering Program
FAPESP's process: 18/12021-6 - Partial oxidation of methane to methanol catalyzed by single-atom noble metal (Rh, Pd or Pt) supported on doped mesoporous CeO2 (Ce1-xMxO2, M = Zr, Sn or La)
Grantee:Luiz Henrique Vieira
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 15/06246-7 - Biorefinery concept applied to biological wastewater treatment plants: environmental pollution control coupled with material and energy recovery
Grantee:Marcelo Zaiat
Support type: Research Projects - Thematic Grants