Mayenite-based electride C12A7e−: an innovative synthetic method via plasma arc melting

Sebastian Weber,Holger Kohlmann,Karsten Seidel,Sebastian Schäfer,Roger Gläser,Stephan A Schunk,Mattia Saccoccio

doi:10.1039/d0qm00688b

Abstract

The plasma arc melting of mixtures of oxygen-mayenite and solid-reductants (aluminum and graphite) enables the scalable synthesis of mayenite-based electrides with treatment times below one minute.

Highlights

The synthesis of the first crystalline electride Cs+(18-crown-6)2eÀ was reported in 1983 by Ellaboudy et al and the structure of this compound could be resolved three years later by Dawes et al.[1,2] Based on these studies electrides can be defined as ionic compounds in which electrons act as anions, contained in cavities, while the electron can be delocalized within the cavity.[3]
In the following discussion we first focus on the successful synthesis of C12A7eÀ by plasma treatment while discussing the influence of different solid reductants and treatment variations of powders
In the second subsection, we critically discuss the suitability of some of the methods reported in the literature for the determination of a relevant property as the electron concentration for samples of our pellet-based synthesis approach

Summary

Introduction

The synthesis of the first crystalline electride Cs+(18-crown-6)2eÀ was reported in 1983 by Ellaboudy et al and the structure of this compound could be resolved three years later by Dawes et al.[1,2] Based on these studies electrides can be defined as ionic compounds in which electrons act as anions, contained in cavities, while the electron can be delocalized within the cavity.[3].

Results

Conclusion