Kirste, K., McAulay, K., Bell, T. E., Stoian, D., Laassiri, S., Daisley, A., Hargreaves, J. S.J. , Mathisen, K. and Torrente-Murciano, L. (2021) COx-free hydrogen production from ammonia – mimicking the activity of Ru catalysts with unsupported Co-Re alloys. Applied Catalysis B: Environmental, 280, 119405. (doi: 10.1016/j.apcatb.2020.119405)
|
Text
222317.pdf - Published Version Available under License Creative Commons Attribution. 2MB |
Abstract
On-demand production of hydrogen from ammonia is a challenge limiting the implementation of ammonia as a long term hydrogen vector to overcome the difficulties associated with hydrogen storage. Herein, we present the development of catalysts for the on-demand production of hydrogen from ammonia by combining metals with high and low N-adatom adsorption energies. In this way, cobalt-rhenium (Co-Re) catalysts show high activity mimicking that of ruthenium. EXAFS/XANES analyses demonstrate that the bimetallic Co-Re contribution is responsible for the activity and the stability of the catalysts in consecutive runs with no observable formation of nitrides (Co-N and Re-N) occurring under the ammonia atmosphere. While cobalt is partially re-oxidised under ammonia, re-reduction in the presence of rhenium is observed at higher temperatures, coinciding with the on-set of catalytic activity which is accompanied by minor structural changes. These results provide insight for the development of highly active alloy based ammonia decomposition catalysts.
| Item Type: | Articles |
|---|---|
| Additional Information: | Also funded by UK Engineering and Physical Science Research Council (EPSRC grant numbers EP/L020432/2, EP/N013778/1, and EP/L026317/1). |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Laassiri, Dr Said and Daisley, Miss Angela and Hargreaves, Professor Justin and McAulay, Dr Kate |
| Creator Roles: | McAulay, K.Investigation, Writing – review and editing Laassiri, S.Investigation, Writing – review and editing Daisley, A.Investigation, Writing – review and editing Hargreaves, J.Supervision, Funding acquisition, Writing – review and editing |
| Authors: | Kirste, K., McAulay, K., Bell, T. E., Stoian, D., Laassiri, S., Daisley, A., Hargreaves, J. S.J., Mathisen, K., and Torrente-Murciano, L. |
| College/School: | College of Science and Engineering > School of Chemistry |
| Journal Name: | Applied Catalysis B: Environmental |
| Publisher: | Elsevier |
| ISSN: | 0926-3373 |
| ISSN (Online): | 1873-3883 |
| Published Online: | 07 August 2020 |
| Copyright Holders: | Copyright © 2020 The Authors |
| First Published: | First published in Applied Catalysis B: Environmental 280:119405 |
| Publisher Policy: | Reproduced under a Creative Commons license |
University Staff: Request a correction | Enlighten Editors: Update this record
Funder and Project Information
Funder and Project Information