High CO tolerance of Pt nanoparticles synthesized by sodium borohydride in a time-domain NMR spectrometer

Autor(es)

Ramos, A. S. ^[1] ; Santos, M. C. L. ^[1] ; Godoi, C. M. ^[1] ; de Queiroz, L. C. ^[2] ; Nandenha, J. ^[1] ; Fontes, E. H. ^[1] ; Brito, W. R. ^[2] ; Machado, M. B. ^[2] ; Neto, A. O. ^[1] ; de Souza, R. F. B. ^[1]

Afiliação do(s) autor(es)

^[1] IPEN CNEN SP, Inst Pesquisas Energet & Nucl, Av Prof Lineu Prestes, 2242 Cidade Univ, BR-05508900 Sao Paulo, SP - Brazil

^[2] Univ Fed Amazonas, UFAM, Cent Analyt, Av Gen Rodrigo Octavio Jordao Ramos, BR-69067005 Manaus, Amazonas - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 45, n. 43, p. 22973-22978, SEP 3 2020.
• Citações Web of Science: 0

Resumo

The CO poisoning effect was overcome using a novel synthesis method. This method consists of using sodium borohydride reducing agent assisted by magnetic field and radiofrequency pulses in the time-domain NMR spectrometer. This synthesis was useful to disperse the Pt nanoparticles over the carbon support and to compress the lattice strain of the Pt crystalline structure. Besides that, Pt/C MFP90 degrees showed a multi-CO oxidation component in cyclic voltammetry, and this can avoid the poisoning effect by creating a large availability of CO species to be adsorbed, desorbed, and re-adsorbed. Pt/C MFP90 degrees has also shown the best performance in the PEMFC regarding H-2 and CO + H-2 experiments. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 14/50279-4 - Brasil Research Centre for Gas Innovation
• Beneficiário: Julio Romano Meneghini
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
• Processo FAPESP: 14/09087-4 - Estudos sobre o uso do bioetanol em células a combustível do tipo PEMFC e SOFC
• Beneficiário: Marcelo Linardi
• Modalidade de apoio: Auxílio à Pesquisa - Temático