Influence of the Cobalt Active Site Neighbours in NiCo Nanocatalysts for Phosphine‐Assisted Silane Activation

Author:

Ropp Anthony1,Carenco Sophie1ORCID

Affiliation:

1. Sorbonne Université CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP) 4 place Jussieu 75005 Paris France

Abstract

AbstractNiCo nanoparticles are active catalysts for a number of reactions, as an interesting alternative to noble metals. In particular, phosphine‐covered NiCo nanoparticles with a 1 : 1 metal ratio were found to be active at room temperature for Si−H bond activation. However, it was unclear which of the two metals was the active site and if the neighbouring atoms influenced the reaction efficiency. We designed nanoparticles with a nickel core and a limited amount of cobalt surface sites, just below or just above a monolayer amount, to investigate this question. We showed that the trend in catalytic activity is consistent with cobalt being the active site, and it shows a higher activity when its immediate neighbours are cobalt atoms. This was consistently observed with two phosphine ligands, PPh3 and PnBu3, while the first allowed a higher conversion rate than the second.

Publisher

Wiley

Subject

Inorganic Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Catalysis

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