Recent Advances in Bimetallic Catalysts for Hydrogen Production from Ammonia

• Published in: Chemical record Vol. 22; no. 7; pp. e202200030 - n/a
• Main Authors: Khan, Wasim U, Alasiri, Hassan S, Ali, Syed A, Hossain, Mohammad M
• Format: Journal Article
• Language: English
• Published: United States Wiley Subscription Services, Inc 01.07.2022
• Subjects: Ammonia; Bimetallic catalyst; Bimetals; Catalysts; Cobalt; Decomposition; Decomposition reactions; Heavy metals; Hydrogen; Hydrogen production; Hydrogen storage; Hydrogen-based energy; Metals; Molybdenum; Nickel; Reaction kinetics; Ruthenium; Synergistic effect; Transition metals; Ammonia; Decomposition; Synergistic effect; Bimetallic catalyst; Hydrogen
• ISSN: 1527-8999; 1528-0691
• DOI: 10.1002/tcr.202200030

The emerging concept of the hydrogen economy is facing challenges associated with hydrogen storage and transport. The utilization of ammonia as an energy (hydrogen) carrier for the on‐site generation of hydrogen via ammonia decomposition has gained attraction among the scientific community. Ruthenium‐based catalysts are highly active but their high cost and less abundance are limitations for scale‐up application. Therefore, combining ruthenium with cheaper transition metals such as nickel, cobalt, iron, molybdenum, etc., to generate metal‐metal (bimetallic) surfaces suitable for ammonia decomposition has been investigated in recent years. Herein, the recent trends in developing bimetallic catalyst systems, the role of metal type, support materials, promoter, synthesis techniques, and the investigations of the reaction kinetics and mechanism for ammonia decomposition have been reviewed. Utilizing blue ammonia to generate carbon‐neutral power has received global attention after Saudi Arabia's first shipment to Japan to boost hydrogen energy future prospects. Ammonia decomposition requires catalyst with high activity, stability, economic viability and potential for scale‐up applications. Recent developments in bimetallic catalysts for ammonia decomposition have shown the metal‐metal alloy can offer an efficient alternative to existing catalysts system.