Glycerol electrooxidation catalyzed by Pt-Sb suppo... - BV FAPESP
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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.)

Glycerol electrooxidation catalyzed by Pt-Sb supported in periodic mesoporous carbon CMK-3 and CMK-5

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Author(s):
Andrade, Renato N. de [1] ; Perini, Nickson [1, 2] ; Vieira, Jose Lucas [1, 3] ; Gallo, Jean Marcel R. [1, 3] ; Sitta, Elton [1, 2]
Total Authors: 5
Affiliation:
[1] Univ Fed Sao Carlos, Dept Chem, Rod Washington Luis, KM 235, POB 676, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Estadual Campinas, Ctr Innovat New Energies CINE, BR-13083841 Campinas, SP - Brazil
[3] Univ Fed Sao Carlos, Grp Renewable Energy Nanotechnol & Catalysis Gree, Dept Chem, Rod Washington Luis, KM 235, POB 676, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: JOURNAL OF ELECTROANALYTICAL CHEMISTRY; v. 896, SEP 1 2021.
Web of Science Citations: 0
Abstract

Glycerol is a biomass-derivative feedstock with potential use in direct alcohol fuel cells. In this work, we have studied the influence of distinct carbon-supports for N-Sb catalysts applied to glycerol electrooxidation reaction. The carbon matrixes were synthesized from Si templates with distinct geometries, giving the so-called CMK-3 and CMK-5, whose 3D structures were characterized employing SAXS, TGA, TEM, and N-2 adsorption isotherms. N nanoparticles were synthesized onto the carbon structures (Pt/C-x within X = CMK-3, CMK-5, or Vulcan) and converted to Pt-Sb/C catalysts by irreversible Sb2O3 adsorption on Pt/C-x covering up to 97% of N surface as inferred by cyclic voltammograms. Regardless of the carbon support, the onset of glycerol oxidation on N-Sb/C is ca 0.4 V (vs RHE), however, at higher potentials in cyclic voltammetric conditions or chroamperometric curves, Pt-Sb/CCMK-3 depicted the best activity among the synthesized catalysts, providing currents 1.6 and 2.0 times bigger than those in Pt-Sb/CCMK-5, and Pt-Sb/C-vulcan, respectively after 800 s at 0.5 V. The results are explained utilizing the coupled between the glycerol mass transport from bulk to active sites in carbon matrixes and re-adsorption of partially oxidized reaction products. (AU)

FAPESP's process: 20/04109-0 - Synthesis of porous acid carbons for the conversion of glucose to HMF
Grantee:José Lucas Vieira
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
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
FAPESP's process: 16/02128-2 - Design of new catalytic systems for the biorefinery
Grantee:Jean Marcel Ribeiro Gallo
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 17/11986-5 - Generation and storage of New Energy: bringing technological development for the country
Grantee:Ana Flávia Nogueira
Support Opportunities: Research Grants - Research Centers in Engineering Program