Gallou, Fabrice (2022) Passivation Effect of Micelles on [Ni-Co] Bimetallic Nanosheets for (Z)-Selective Semihydrogenation of Alkynes Using Water as the Hydrogen Source. ACS Appl. Mater. Interfaces, 14 (5). pp. 6754-6761.

Abstract

A micelle-enabled strategy for the stabilization of early row transition metals nanoparticles in water has been developed. This is achieved by the rational design of pyridine based amphiphilic molecule, PY-750-M. Combination of Ni-Co bimetal-lic nanoparticles and PY-750-M in water resulted in the formation of stable nanosheets in aqueous micellar condition. The catalyst was found to be highly active for water splitting at thermal condition and showcase its application for selective semhydrogenation of alkynes using water as the cleanest hydrogen source. This method was also capable of producing di-deuterated alkenes up to 98% deuterium incorporation. This catalytic system was thoroughly characterized using HRTEM to obtain the particle size, distribution, and morphology. Further, XPS studies were performed to find the oxida-tion states of individual metals. Control experiments revealed the significance of each catalyst component to get desired activity and the crucial role of amphiphile PY-750-M for controlling the reactivity and selectivity. This aqueous strategy is applicable to a broad range of substrates and exhibits excellent functional group tolerance and having 99% selectivity for Z-alkenes. The scalability of this methodology is demonstrated on a gram-scale reaction. This approach represents one of the greenest and sustainable route to access (Z)-alkene or di-deuterated alkene.

Item Type:	Article
Date Deposited:	24 Jan 2023 00:45
Last Modified:	24 Jan 2023 00:45
URI:	https://oak.novartis.com/id/eprint/47711