Layer-by-layer assemblies of highly connected polyelectrolyte capped-Pt nanoparticles for electrocatalysis of hydrogen evolution reaction

Herein we present a simple one-step method to produce polyelectrolyte-capped Pt nanoparticles able to be assembled into layer-by-layer arrays with a linear dependence of the amount of deposited material on the number of dipping cycles. The resulting supramolecular films where fully characterized by AFM, XPS and ATR-FTIR. The electrochemical evaluation by cyclic voltammetry showed good electrochemical connection between the nanoparticles in both acidic and neutral solutions. The films assembled on graphite electrodes showed catalysis of the H2 production and the interconnection between nanoparticles proved to be effective up to 20 bilayers. Results presented here reveal an easy procedure to obtain stable arrays of well-dispersed electroactive 2 nm-diameter Pt nanoparticles on a variety of substrates with direct potential applications in energy conversion devices.

Publication year: 2017
Authors: Fenoy G.E. a, b, Maza E. a, c, Zelaya E. d, Marmisollé W.A. a, Azzaroni O. a

a – Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) – Departamento de Química – Facultad de Ciencias Exactas – Universidad Nacional de La Plata (UNLP), CONICET, 64 and 113, La Plata 1900, Argentina
b – Instituto de Investigación e Ingeniería Ambiental, Universidad Nacional de San Martín, 25 de mayo y Francia, 1 piso, 1650 Buenos Aires, Argentina
c – Soft Matter Nanotechnology Group, CIC biomaGUNE, Paseo Miramón 182, 20009 San Sebastián, Gipuzkoa, Spain
d – CAB-CNEA, Av. Bustillo km 9.5 (8400), S.C. de Bariloche, CONICET, Argentina

Published in: Applied Surface Science, 2017, Vol. 416, p. 24–32
DOI: 10.1016/j.apsusc.2017.04.086


AFM in situ layer-by-layer (LbL) monitoring layer formation nanoparticle stabilization for electrochemical devices platinum (Pt) nanoparticles (2nm) polyelectrolyte – nanoparticle multilayer polyelectrolytes


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