Reshaping of platinum nanoparticles from Pt/C by halide ions into electrochemical applications

• Grant number: 19/08051-0
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: July 08, 2019
• End date: July 07, 2020
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
• Principal Investigator: Roberto Manuel Torresi
• Grantee: Rodolfo Molina Antoniassi
• Supervisor: Juan Feliu
• Host Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Institution abroad: Universidad de Alicante (UA), Spain
• Associated to the scholarship: 17/15469-5 - Preparation of nanocatalysts with controlled morphology for applications in hydrogen purification and oxidation of contaminated hydrogen for electric energy generation, BP.PD

Abstract

In this project we carried out a novel methodology of synthesis of platinum-based nanoparticles with controlled morphology. The preparation involves successive steps of leaching and re-deposition of a supported "starting material", transforming the shape of the naturally-formed platinum nanoparticles into preferentially nanocubes. Halide ions are used to leach and control the shape of the synthesized structure. The surface of the materials obtained as well as their evolution throughout the synthesis process will be evaluated by physical and electrochemical characterization techniques. The prepared materials will be applied as catalysts for reactions of interest. With the success of this project, it is expected not only to understand the fundamental concepts behind the mechanisms involved in this synthesis but also to earn the necessary knowledge to create catalytic systems with finely shaped materials, displaying improved performances in catalysis and electrocatalysis. (AU)

Scientific publications

(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)

ERIKSON, HEIKI; ANTONIASSI, RODOLFO M.; SOLLA-GULLON, JOSE; TORRESI, ROBERTO M.; TAMMEVESKI, KAIDO; FELIU, JUAN M.. Oxygen electroreduction on small (< 10 nm) and {100}-oriented Pt nanoparticles. Electrochimica Acta, v. 403, p. 8-pg., 2022-01-20. (17/15469-5, 19/08051-0, 15/26308-7)

ANTONIASSI, RODOLFO M.; MACHADO, ARTHUR P.; PAIVA, ANA RITA N.; QUEIROZ, CARLA M. S.; VAZ, JORGE M.; SPINACE, ESTEVAM, V; SILVA, JULIO CESAR M.; CARMINE, EDUARDO; CAMARGO, PEDRO H. C.; TORRESI, ROBERTO M.. One-Step synthesis of PtFe/CeO2 catalyst for the Co-Preferential oxidation reaction at low temperatures. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v. 46, n. 34, p. 12-pg., 2021-05-03. (14/50279-4, 17/11937-4, 15/26308-7, 17/15469-5, 14/09087-4, 19/08051-0)

ANTONIASSI, RODOLFO M.; ERIKSON, HEIKI; SOLLA-GULLON, JOSE; TORRESI, ROBERTO M.; FELIU, JUAN M.. Small (< 5 nm), Clean, and Well-Structured Cubic Platinum Nanoparticles: Synthesis and Electrochemical Characterization. CHEMELECTROCHEM, v. 8, n. 1, NOV 2020. (17/15469-5, 19/08051-0, 15/26308-7)