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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.)

Ethanol steam reforming: understanding changes in the activity and stability of Rh/MxOy catalysts as function of the support

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Author(s):
Rodrigues, Thenner S. [1, 2] ; e Silva, Felipe A. [1, 2] ; Candido, Eduardo G. [1] ; da Silva, Anderson G. M. [3] ; Geonmonond, Rafael dos S. [3] ; Camargo, Pedro H. C. [3] ; Linardi, Marcelo [1] ; Fonseca, Fabio C. [1]
Total Authors: 8
Affiliation:
[1] IPEN CNEN SP, Inst Pesquisas Energet & Nucl, Av Prof Lineu Prestes 2242, BR-05508000 Sao Paulo, SP - Brazil
[2] Univ Fed Rio de Janeiro, COPPE, Alberto Luiz Coimbra Inst Grad Studies & Res Engn, Nanotechnol Engn Program, Av Horacio Macedo 2030, BR-21941972 Rio De Janeiro, RJ - Brazil
[3] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Av Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Materials Science; v. 54, n. 17, p. 11400-11416, SEP 2019.
Web of Science Citations: 1
Abstract

We reported herein a systematic investigation on how the nature of the support affected the catalytic performances of Rh nanoparticles. The prepared catalysts were denoted as Rh/MxOy, where M corresponded to Ce, Ti, Si, Zn, and Al, and Rh was Rh3+ reduction to Rh nanoparticles on the surface of oxides. This strategy was performed in a single step using urea as a mediator and in the absence of any other stabilizer or capping agent. The Rh nanoparticles displayed relatively similar sizes, shapes, and uniform distribution over the supports, differing only in terms of the nature of the support. This strongly affected the metal-support interaction between Rh nanoparticles and the respective oxides, leading to significant differences in their catalytic performances toward the ethanol steam reforming. Here, not only the catalytic activity (in terms of ethanol conversion) was affected, but both the selectivity and stability were also influenced by the nature of the oxide support. Interestingly, the reaction paths as well as the deactivation profile were completely changed as function of the employed support. Such differences were associated with differences in the oxygen storage, oxygen mobility, and acidity/basicity of the supports. We believe that our results can contribute to the development and understanding of Rh-supported catalysts for the applications toward gas-phase transformations such as the ethanol steam reforming reaction. (AU)

FAPESP's process: 14/50279-4 - Brasil Research Centre for Gas Innovation
Grantee:Julio Romano Meneghini
Support Opportunities: Research Grants - Research Centers in Engineering Program
FAPESP's process: 14/09087-4 - Studies on the use of bioethanol in proton exchange membrane and solid oxide fuel cells
Grantee:Marcelo Linardi
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 15/26308-7 - Optimization of the physicochemical properties of nano -structured materials for applications in molecular recognition, catalysis and energy conversion/storage
Grantee:Roberto Manuel Torresi
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 17/04929-5 - Development of catalysts to obtain hydrogen from bio-ethanol
Grantee:Thenner Silva Rodrigues
Support Opportunities: Scholarships in Brazil - Post-Doctoral