The reduction of various nitrides under hydrogen: Ni3N, Cu3N, Zn3N2 and Ta3N5

Alexander, A.-M., Hargreaves, J.S.J. and Mitchell, C. (2012) The reduction of various nitrides under hydrogen: Ni3N, Cu3N, Zn3N2 and Ta3N5. Topics in Catalysis, 55(14-15), pp. 1046-1053. (doi:10.1007/s11244-012-9890-3)

Full text not currently available from Enlighten.

Abstract

Metal nitrides may be of interest as potential sources of activated nitrogen which can be reacted with target organic molecules. Accordingly, the reduction of nitrogen within Ni<sub>3</sub>N, Cu<sub>3</sub>N, Zn<sub>3</sub>N<sub>2</sub> and Ta<sub>3</sub>N<sub>5</sub> under a 1/3 Ar/H<sub>2</sub> flow at elevated temperature has been determined as a simple test of lattice nitrogen reactivity. As anticipated by consideration of their stability, Ni<sub>3</sub>N and Cu<sub>3</sub>N are reduced completely at 250 °C with up to 30 % of their total lattice nitrogen yielding ammonia. The elimination of N<sub>2</sub> results in the formation of pores which are particularly pronounced in the case of the denitrided Cu system. In the case of Zn<sub>3</sub>N<sub>2</sub>, the lattice nitrogen is less reactive with incomplete denitridation being observed at 400 °C and the amount of ammonia produced being 15 % of the total nitrogen available. Although Ta<sub>3</sub>N<sub>5</sub> contains the least reactive nitrogen of the four samples studied, it can be regenerated by ammonolysis which is an important consideration in any envisaged application.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Alexander, Miss Anne-Marie and Hargreaves, Professor Justin
Authors: Alexander, A.-M., Hargreaves, J.S.J., and Mitchell, C.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Topics in Catalysis
Publisher:Springer
ISSN:1022-5528
ISSN (Online):1572-9028
Published Online:21 August 2012

University Staff: Request a correction | Enlighten Editors: Update this record