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http://hdl.handle.net/2445/188422
Title: | Nanostructuring determines poisoning: Tailoring CO adsorption on PtCu bimetallic nanoparticles. |
Author: | Vega Dominguez, Lorena García Cardona, Julia Viñes Solana, Francesc Cabot Julià, Pere-Lluís Neyman, Konstantin M. |
Keywords: | Electrocatàlisi Teoria del funcional de densitat Nanopartícules Electrocatalysis Density functionals Nanoparticles |
Issue Date: | 11-Mar-2022 |
Publisher: | Royal Society of Chemistry |
Abstract: | Here we show, combining CO stripping voltammograms on different PtCu nanoparticle (NP) low-temperature fuel cell electrocatalysts and density functional calculations, that surface chemical ordering and the presence of certain defects explain the CO tolerance vs. poisoning of such systems. The CO withdrawal for these duelling CO-slingers depends on whether they are well-shaped core@shell Cu@Pt NPs, more CO-tolerant, or having Cu-surrounded surface Pt atoms or adatoms/vacancies surface defects, less CO-tolerant. The latter sites are critical on nm-sized PtCu NPs, displaying stronger CO adsorption compared to pure Pt NPs. Avoiding such sites is key when designing less expensive and CO-poisoned Cu@Pt NP-based electrocatalysts. |
Note: | Reproducció del document publicat a: https://doi.org/10.1039/D2MA00196A |
It is part of: | Materials Advances, 2022, vol. 3, num. 10, p. 4159-4169 |
URI: | http://hdl.handle.net/2445/188422 |
Related resource: | https://doi.org/10.1039/D2MA00196A |
ISSN: | 2633-5409 |
Appears in Collections: | Articles publicats en revistes (Institut de Química Teòrica i Computacional (IQTCUB)) Articles publicats en revistes (Ciència dels Materials i Química Física) |
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