Dual properties of a hydrogen oxidation Ni-catalyst entrapped within a polymer promote self-defense against oxygen /639/638/77/886 /639/638/161/893 /639/638/675 /120 /128 /140/131 article

Alaa A. Oughli, Adrian Ruff, Nilusha Priyadarshani Boralugodage, Patricia Rodríguez-Maciá, Nicolas Plumeré, Wolfgang Lubitz, Wendy J. Shaw, Wolfgang Schuhmann, Olaf Rüdiger

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36 Scopus citations

Abstract

The Ni(P 2 N 2 ) 2 catalysts are among the most efficient non-noble-metal based molecular catalysts for H 2 cycling. However, these catalysts are O 2 sensitive and lack long term stability under operating conditions. Here, we show that in a redox silent polymer matrix the catalyst is dispersed into two functionally different reaction layers. Close to the electrode surface is the "active" layer where the catalyst oxidizes H 2 and exchanges electrons with the electrode generating a current. At the outer film boundary, insulation of the catalyst from the electrode forms a "protection" layer in which H 2 is used by the catalyst to convert O 2 to H 2 O, thereby providing the "active" layer with a barrier against O 2 . This simple but efficient polymer-based electrode design solves one of the biggest limitations of these otherwise very efficient catalysts enhancing its stability for catalytic H 2 oxidation as well as O 2 tolerance.

Original languageEnglish
Article number864
JournalNature Communications
Volume9
Issue number1
DOIs
StatePublished - 1 Dec 2018
Externally publishedYes

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