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Citrate-gel preparation and ammonia synthesis activity of compounds in the quaternary (Ni,M)2Mo3N (M = Cu or Fe) systems

Citrate-gel preparation and ammonia synthesis activity of compounds in the quaternary (Ni,M)2Mo3N (M = Cu or Fe) systems
Citrate-gel preparation and ammonia synthesis activity of compounds in the quaternary (Ni,M)2Mo3N (M = Cu or Fe) systems
Single phase solid solutions based on copper and iron substitution into the nickel sites of Ni2Mo3N are produced using a citrate gel approach followed by ammonolysis. These metal nitrides show good ammonia synthesis activity at 500 °C and ambient pressure. The activity fell with copper content and increased with iron content, although these changes appear to be related to changing surface areas of the catalysts. The oxide intermediates from the citrate gel process cleanly converted to the metal nitride under the ammonia synthesis gas stream (75% H2, 25% N2) providing more active catalysts than those pre-nitrided by ammonolysis.
0300-9246
16786-16792
Alsobhi, Samia, Ibrahim N
38a7cc19-8013-4947-98ac-f6d3b56982c9
Hargreaves, Justin
6f7ad5d0-6fee-4116-aec7-6022dce8331e
Hector, Andrew L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Laassiri, Said
ee91bba8-bbb2-4460-b515-bd1833ccfad0
Alsobhi, Samia, Ibrahim N
38a7cc19-8013-4947-98ac-f6d3b56982c9
Hargreaves, Justin
6f7ad5d0-6fee-4116-aec7-6022dce8331e
Hector, Andrew L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Laassiri, Said
ee91bba8-bbb2-4460-b515-bd1833ccfad0

Alsobhi, Samia, Ibrahim N, Hargreaves, Justin, Hector, Andrew L. and Laassiri, Said (2019) Citrate-gel preparation and ammonia synthesis activity of compounds in the quaternary (Ni,M)2Mo3N (M = Cu or Fe) systems. Dalton Transactions, 48 (44), 16786-16792, [c9dt03693c]. (doi:10.1039/C9DT03673C).

Record type: Article

Abstract

Single phase solid solutions based on copper and iron substitution into the nickel sites of Ni2Mo3N are produced using a citrate gel approach followed by ammonolysis. These metal nitrides show good ammonia synthesis activity at 500 °C and ambient pressure. The activity fell with copper content and increased with iron content, although these changes appear to be related to changing surface areas of the catalysts. The oxide intermediates from the citrate gel process cleanly converted to the metal nitride under the ammonia synthesis gas stream (75% H2, 25% N2) providing more active catalysts than those pre-nitrided by ammonolysis.

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Ni2Mo3N CuFe manuscript revised - Accepted Manuscript
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Accepted/In Press date: 24 October 2019
e-pub ahead of print date: 25 October 2019
Published date: 12 November 2019

Identifiers

Local EPrints ID: 435305
URI: http://eprints.soton.ac.uk/id/eprint/435305
ISSN: 0300-9246
PURE UUID: 78f03db5-fd37-4bb3-b5bb-5ce00d73b8f6
ORCID for Andrew L. Hector: ORCID iD orcid.org/0000-0002-9964-2163

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Date deposited: 30 Oct 2019 17:30
Last modified: 26 Oct 2020 05:01

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Contributors

Author: Samia, Ibrahim N Alsobhi
Author: Justin Hargreaves
Author: Said Laassiri

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