Complete Protection of O 2 -Sensitive Catalysts in Thin Films - Archive ouverte HAL Access content directly
Journal Articles Journal of the American Chemical Society Year : 2019

Complete Protection of O 2 -Sensitive Catalysts in Thin Films

Abstract

Energy conversion schemes involving dihydrogen hold great potential for meeting sustainable energy needs, but widespread implementation cannot proceed without solutions that mitigate the cost of rare metal catalysts and the O 2 instability of biological and bioinspired replacements. Recently, thick films (>100 μm) of redox polymers were shown to prevent O 2 catalyst damage but also resulted in unnecessary catalyst load and mass transport limitations. Here we apply novel homogeneous thin films (down to 3 μm) that provide protection from O 2 while achieving highly efficient catalyst utilization. Our empirical data are explained by modeling, demonstrating that resistance to O 2 inactivation can be obtained for nonlimiting periods of time when the optimal thickness for catalyst utilization and current generation is achieved, even when using highly fragile catalysts such as the enzyme hydrogenase. We show that different protection mechanisms operate depending on the matrix dimensions and the intrinsic catalyst properties and can be integrated together synergistically to achieve stable H 2 oxidation currents in the presence of O 2 , potentially enabling a plethora of practical applications for bioinspired catalysts under harsh oxidative conditions.

Domains

Catalysis Other
Fichier principal
Vignette du fichier
jacs.9b06790(1).pdf (3.21 Mo) Télécharger le fichier
Origin : Publication funded by an institution
Loading...

Dates and versions

hal-02369997 , version 1 (19-11-2019)

Identifiers

Cite

Huaiguang Li, Darren Buesen, Sébastien Dementin, Christophe Léger, Vincent Fourmond, et al.. Complete Protection of O 2 -Sensitive Catalysts in Thin Films. Journal of the American Chemical Society, 2019, 141 (42), pp.16734-16742. ⟨10.1021/jacs.9b06790⟩. ⟨hal-02369997⟩

Collections

CNRS UNIV-AMU
19 View
31 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More