Artigo de peri??dico
High CO tolerance of Pt nanoparticles synthesized by sodium borohydride in a time-domain NMR spectrometer
Registro en:
0360-3199
43
45
10.1016/j.ijhydene.2020.06.105
0000-0001-8745-3421
69.78
88.50
Autor
RAMOS, A.S.
SANTOS, M.C.L.
GODOI, C.M.
QUEIROZ, L.C. de
NANDENHA, J.
FONTES, E.H.
BRITO, W.R.
MACHADO, M.B.
NETO, A.O.
SOUZA, R.F.B. de
Resumen
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?? 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?? has also shown the best performance in the PEMFC regarding H2 and CO + H2 experiments. Funda????o de Amparo ?? Pesquisa do Estado de S??o Paulo (FAPESP) Conselho Nacional de Desenvolvimento Cient??fico e Tecnol??gico (CNPq) FAPESP: 14/09087-4; 14/50279-4; 17/11937 CNPq: 300816/2016-2; 429727/2018-6