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Controlled Synthesis of Nanomaterials based on Pd and Pt: Electrocatalytic Activity and Stability

Grant number: 16/00819-8
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): August 01, 2017
Effective date (End): May 31, 2019
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
Principal researcher:Susana Inés Córdoba de Torresi
Grantee:Luanna Silveira Parreira
Home Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:15/26308-7 - Optimization of the physicochemical properties of nano -structured materials for applications in molecular recognition, catalysis and energy conversion/storage, AP.TEM


Controlled nanostructures exhibit interesting optical, electrical and physicochemical properties. Additionally, they can be obtained with well-defined features such as composition, structure, shape and size, that are very important for many applications, including catalysis/electrocatalysis. Aiming at achieving desired properties, controlled nanomaterials enable one not only to optimize the electrocatalytic activity of the materials but also to get a precise correlation between the physicochemical properties and the redox reactions involved in electrocatalytic processes. In this context, the study of stability is crucial for the potential practical applications of these materials. This project focuses on the study the activity and stability of controlled nanostructures based on Pt and/or Pd, supported or not in carbonaceous materials, by electrochemical accelerated stress testing (AST) using rotating disk electrode (RDE) with the monitoring of metals dissolution conducted by the ICP-MS technique. Furthermore, localized electron microscopy analysis of the samples, before and after AST, will be performed to detect possible agglomeration and/or sintering processes of particles resulting from degradation, as well as changes in shape. Thus, this project will allow us to correlate changes in the composition and structure of materials with their activity and durability during electrocatalytic processes.

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Scientific publications (10)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DE FREITAS, ISABEL C.; PARREIRA, LUANNA S.; BARBOSA, EDUARDO C. M.; NOVAES, BARBARA A.; MOU, TONG; ALVES, TIAGO. V.; QUIROZ, JHON; WANG, YI-CHI; SLATER, THOMAS J.; THOMAS, ANDREW; WANG, BIN; HAIGH, SARAH J.; CAMARGO, PEDRO H. C. Design-controlled synthesis of IrO2 sub-monolayers on Au nanoflowers: marrying plasmonic and electrocatalytic properties. NANOSCALE, v. 12, n. 23, p. 12281-12291, JUN 21 2020. Web of Science Citations: 0.
AVEIRO, L. R.; DA SILVA, A. G. M.; CANDIDO, E. G.; PAZ, E. C.; PINHEIRO, V. S.; PARREIRA, L. S.; SOUZA, F. M.; ANTONIN, V. S.; CAMARGO, P. H. C.; DOS SANTOS, M. C. MnO2/Vulcan-Based Gas Diffusion Electrode for Mineralization of Diazo Dye in Simulated Effluent. ELECTROCATALYSIS, v. 11, n. 3 JAN 2020. Web of Science Citations: 0.
PAZ, EDSON C.; PINHEIRO, VICTOR S.; SOUSA JOCA, JHONNY FRANK; SOTANA DE SOUZA, RAFAEL AUGUSTO; GENTIL, TUANI C.; LANZA, MARCOS R. V.; MOISES DE OLIVEIRA, HUEDER PAULO; PEREIRA NETO, ANA MARIA; GAUBEUR, IVANISE; SANTOS, MAURO C. Removal of Orange II (OII) dye by simulated solar photoelectro-Fenton and stability of WO2.72/Vulcan XC72 gas diffusion electrode. Chemosphere, v. 239, JAN 2020. Web of Science Citations: 0.
PARREIRA, LUANNA S.; ANTONIASSI, RODOLFO M.; FREITAS, ISABEL C.; DE OLIVEIRA, DANIELA C.; SPINACE, ESTEVAM V.; CAMARGO, PEDRO H. C.; DOS SANTOS, MAURO C. MWCNT-COOH supported PtSnNi electrocatalysts for direct ethanol fuel cells: Low Pt content, selectivity and chemical stability. RENEWABLE ENERGY, v. 143, p. 1397-1405, DEC 2019. Web of Science Citations: 1.
PAZ, EDSON C.; PINHEIRO, VICTOR S.; AVEIRO, LUCI R.; SOUZA, FERNANDA L.; LANZA, V, MARCOS R.; SANTOS, MAURO G. Hydrogen Peroxide Electrogeneration by Gas Diffusion Electrode Modified with Tungsten Oxide Nanoparticles for Degradation of Orange II and Sunset Yellow FCF Azo Dyes. Journal of the Brazilian Chemical Society, v. 30, n. 9, p. 1964-1975, SEP 2019. Web of Science Citations: 0.
BARBOSA, EDUARDO C. M.; PARREIRA, LUANNA S.; DE FREITAS, ISABEL C.; AVEIRO, LUCI R.; DE OLIVEIRA, DANIELA C.; DOS SANTOS, MAURO C.; CAMARGO, PEDRO H. C. Pt-Decorated TiO2 Materials Supported on Carbon: Increasing Activities and Stabilities toward the ORR by Tuning the Pt Loading. ACS APPLIED ENERGY MATERIALS, v. 2, n. 8, p. 5759-5768, AUG 2019. Web of Science Citations: 0.
PINHEIRO, VICTOR S.; PAZ, EDSON C.; AVEIRO, LUCI R.; PARREIRA, LUANNA S.; SOUZA, FELIPE M.; CAMARGO, PEDRO H. C.; SANTOS, MAURO C. Mineralization of paracetamol using a gas diffusion electrode modified with ceria high aspect ratio nanostructures. Electrochimica Acta, v. 295, p. 39-49, FEB 1 2019. Web of Science Citations: 3.
AVEIRO, L. R.; DA SILVA, A. G. M.; CANDIDO, E. G.; ANTONIN, V. S.; PARREIRA, L. S.; PAPAI, R.; GAUBEUR, I; SILVA, FERNANDO L.; LANZA, V, M. R.; CAMARGO, P. H. C.; SANTOS, M. C. Application and stability of cathodes with manganese dioxide nanoflowers supported on Vulcan by Fenton systems for the degradation of RB5 azo dye. Chemosphere, v. 208, p. 131-138, OCT 2018. Web of Science Citations: 8.
AVEIRO, LUCI R.; DA SILVA, ANDERSON G. M.; ANTONIN, VANESSA S.; CANDIDO, EDUARDO G.; PARREIRA, LUANNA S.; GEONMONOND, RAFAEL S.; DE FREITAS, ISABEL C.; LANZA, MARCOS R. V.; CAMARGO, PEDRO H. C.; SANTOS, MAURO C. Carbon-supported MnO2 nanoflowers: Introducing oxygen vacancies for optimized volcano-type electrocatalytic activities towards H2O2 generation. Electrochimica Acta, v. 268, p. 101-110, APR 1 2018. Web of Science Citations: 11.
SOUZA, F. MOURA; NANDENHA, J.; BATISTA, B. L.; OLIVEIRA, V. H. A.; PINHEIRO, V. S.; PARREIRA, L. S.; NETO, A. O.; SANTOS, M. C. PdxNby electrocatalysts for DEFC in alkaline medium: Stability, selectivity and mechanism for FOR. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v. 43, n. 9, p. 4505-4516, MAR 1 2018. Web of Science Citations: 13.

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