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

Screening of the Au:Pt Atomic Ratio Supported in SrCO3: Effects on the Performance of the Solvent-Free Oxidation of Benzyl Alcohol

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Author(s):
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Francisco S. C. L. Batista [1] ; Itaciara E. M. S. Melo [2] ; Laíse N. S. Pereira [3] ; Alexia G. P. Lima [4] ; Ali H. Bashal [5] ; Jean C. S. Costa [6] ; Janildo L. Magalhães [7] ; Francisco C. A. Lima ; Carla V. R. Moura [9] ; Marco A. S. Garcia [10] ; Edmilson M. Moura [11]
Total Authors: 11
Affiliation:
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[1] Universidade Federal do Piauí. Departamento de Química - Brasil
[2] Universidade Federal do Piauí. Departamento de Química - Brasil
[3] Universidade Federal do Piauí. Departamento de Química - Brasil
[4] Universidade Federal do Piauí. Departamento de Química - Brasil
[5] Taibah University. Faculty of Science. Department of Chemistry
[6] Universidade Federal do Piauí. Departamento de Química - Brasil
[7] Universidade Federal do Piauí. Departamento de Química - Brasil
[9] Universidade Federal do Piauí. Departamento de Química - Brasil
[10] Universidade Federal do Piauí. Departamento de Química - Brasil
[11] Universidade Federal do Piauí. Departamento de Química - Brasil
Total Affiliations: 11
Document type: Journal article
Source: Journal of the Brazilian Chemical Society; v. 31, n. 3, p. 488-497, 2020-03-02.
Abstract

We have prepared, by a sol-immobilization method, bimetallic catalysts with different Au:Pt atomic ratios supported on commercial SrCO3. The catalytic performance for the oxidation reaction of benzyl alcohol of such materials was compared to the monometallic counterparts, aiming at the obtaining of the best composition of the material. It was found that the Au:Pt atomic ratio presents a remarkable effect on the system performance, i.e., Pt-rich systems are more selective; however, less active. Thus, an equilibrium related to the activity and selectivity of the system was obtained by considering the yield of the system. Also, some density functional theory (DFT) insights were obtained by using a cluster of 14 atoms of Au and 1 or 2 atoms of Pt. X-ray photoelectron spectroscopy, elemental mapping in scanning transmission electron microscopy before and after catalyst usage, flame atomic absorption spectroscopy, Rietveld refinement, among other techniques, were used and associated to the experimental data, which allowed us to propose a catalytic mechanism for the system, which was important since SrCO3 has not been considered before as catalyst support for alcohol oxidation reactions. (AU)

FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC