L
Luanna S. Parreira
Researcher at University of São Paulo
Publications - 39
Citations - 888
Luanna S. Parreira is an academic researcher from University of São Paulo. The author has contributed to research in topics: Electrocatalyst & Catalysis. The author has an hindex of 14, co-authored 37 publications receiving 629 citations. Previous affiliations of Luanna S. Parreira include National Nuclear Energy Commission & Universidade Federal do ABC.
Papers
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Journal ArticleDOI
Ethanol oxidation reactions using SnO2@Pt/C as an electrocatalyst
Júlio César M. Silva,R. F. B. de Souza,Luanna S. Parreira,E. Teixeira Neto,Marcelo L. Calegaro,M.C. Santos +5 more
TL;DR: In this article, the formation of core-shell nanoparticles (SnO2@Pt/C) was measured by UV-vis spectrophotometry, and the results showed that the nano-particle formation was associated with an increase in the electrochemically active surface area.
Journal ArticleDOI
PtSn/C alloyed and non-alloyed materials: Differences in the ethanol electro-oxidation reaction pathways
Júlio César M. Silva,Júlio César M. Silva,Luanna S. Parreira,Luanna S. Parreira,R. F. B. de Souza,R. F. B. de Souza,Marcelo L. Calegaro,Marcelo L. Calegaro,Estevam V. Spinacé,Estevam V. Spinacé,Almir Oliveira Neto,Almir Oliveira Neto,M.C. Santos,M.C. Santos +13 more
TL;DR: In this article, the electrocatalytic activity for both materials was investigated using chronoamperometry, and at 0.5 V vs. RHE, the current density for the PPM material was approximately 5 times higher than on the SGM material.
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Study of ethanol electro-oxidation in acid environment on Pt3Sn/C anode catalysts prepared by a modified polymeric precursor method under controlled synthesis conditions
R. F. B. de Souza,Luanna S. Parreira,D. C. Rascio,Júlio César M. Silva,Erico Teixeira-Neto,Marcelo L. Calegaro,Estevam V. Spinacé,Almir Oliveira Neto,M.C. Santos +8 more
TL;DR: In this paper, a carbon-supported binary Pt 3 Sn catalyst has been prepared using a modified polymeric precursor method under controlled synthesis conditions, and the results indicate that 23% (of a possible 25%) of Sn is alloyed with Pt.
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PtSnCe/C electrocatalysts for ethanol oxidation: DEFC and FTIR ``in-situ{''} studies
R. F. B. de Souza,Luanna S. Parreira,Júlio César M. Silva,Fernando Carmona Simões,Marcelo L. Calegaro,Martha Janete de Giz,Giuseppe A. Camara,Almir Oliveira Neto,M.C. Santos +8 more
TL;DR: In this paper, the authors investigated the performance of different Pt-Ce/C electrocatalysts in different mass ratios (72:23:5, 68:22:10 and 64:21:15) for ethanol oxidation.
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Carbon-supported MnO2 nanoflowers: Introducing oxygen vacancies for optimized volcano-type electrocatalytic activities towards H2O2 generation
Luci R. Aveiro,Anderson G. M. da Silva,V. S. Antonin,V. S. Antonin,Eduardo G Candido,Luanna S. Parreira,Rafael S. Geonmonond,Isabel C. de Freitas,Marcos R.V. Lanza,Pedro H. C. Camargo,Mauro C. Santos +10 more
TL;DR: In this article, the authors describe the synthesis of hybrid materials composed of MnO2 nanoflowers supported on Vulcan XC-72 carbon in which the concentration of the surface oxygen vacancy sites was increased.