Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The formate electrooxidation on Pt/C and PtSnO2/C nanoparticles in alkaline media: The effect of morphology and SnO2 on the platinum catalytic activity

Full text
Author(s):
Santos, Aila O. [1] ; Silva, Julio Cesar M. [1] ; Antoniassi, Rodolfo M. [2, 3] ; Ponzio, Eduardo A. [1] ; Alves, Odivaldo C. [1]
Total Authors: 5
Affiliation:
[1] Univ Fed Fluminense, Inst Quim, Lab Mat UFF LaMUFF, Campus Valonguinho, BR-24020141 Niteroi, RJ - Brazil
[2] Univ Fed Fluminense, Inst Qumica, Laboratorio Mat, UFF LaMUFF, BR-24020141 Niteroi, RJ - Brazil
[3] Univ Sao Paulo, Cidade Univ, Ave Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 45, n. 58, p. 33895-33905, NOV 27 2020.
Web of Science Citations: 3
Abstract

Pt/C and PtSnO2/C electrocatalysts with and without cubic preferential morphology were used for formate electrooxidation reaction (FER) in alkaline medium. The synthesis of catalysts was carried out by alcohol reduction method using KBr as a shape directing agent (Bromide Anion Exchange method BAE). The X-ray diffraction (XRD) showed characteristic peaks of the Pt face-centered cubic (FCC) structure, as well as cassiterite SnO2. The Transmission Electron Microscopy (TEM) and Scanning Transmission Electron Microscopy (STEM) micrographs show SnO2 dispersed onto carbon support and adjacent to the Pt nanoparticles (NPs), as well as cubic Pt NPs. The cyclic voltammetry (CV) measurements show that the current density peak for FER on Pt/C (100) is 2.40 times higher than on Pt/C polycrystalline (poly). The current density at end of chronoamperometry (CA) analysis on PtSnO2/C poly was 1.33 and 5.29 times higher than on Pt/C (100) and Pt/C poly, respectively. The presence of SnO2 and the (100) facets of platinum cubic morphology might prevent platinum surface deactivation caused by intermediates formed during the FER process. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 17/15469-5 - Preparation of nanocatalysts with controlled morphology for applications in hydrogen purification and oxidation of contaminated hydrogen for electric energy generation
Grantee:Rodolfo Molina Antoniassi
Support Opportunities: Scholarships in Brazil - Post-Doctoral
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