4.7 Article

Highly-efficient hydrogen production from ammonia decomposition over Co-doped graphdiyne under moderate temperature

Journal

FUEL
Volume 354, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2023.129320

Keywords

Ammonia decomposition; Hydrogen production; Co -doped graphdiyne catalysts; Moderate temperature; Density functional theory

Ask authors/readers for more resources

Manufacturing hydrogen from ammonia decomposition is efficient, but the use of precious metal catalysts hampers its scalable application. In this study, we report the synthesis of metal-doped graphdiyne catalysts, particularly Co-doped graphdiyne, for ammonia decomposition. The Co-doped graphdiyne catalyst demonstrated high reactivity and stability, achieving nearly complete ammonia decomposition at 550℃ and maintaining conversion rate stability over 18 hours of continuous reaction.
Manufacturing hydrogen from ammonia decomposition is an efficient and promising approach for hydrogen utilization. However, its scalable application is significantly impeded by the requirements of precious metal ruthenium (Ru) as catalysts. Herein, we report a type of Co-doped graphdiyne catalyst for catalytically decomposing ammonia (NH3) to generate H2. The metal-doped graphdiyne catalysts were synthesized facilely using co-precipitation approach. The resultant composite catalysts significantly enhanced the reactivity and stability of ammonia decomposition. The Co-doped graphdiyne catalyst achieved nearly complete decomposition of ammonia at 550 & DEG;C, and the conversion rate remained stable over 18 h of continuous reaction. The adsorption and decomposition of ammonia by Co-doped graphdiyne was studied by density functional theory (DFT) calculations. Nitrogen binding strength was used as a descriptor to elucidate the catalyst's activity and reaction kinetics, further supported by the reaction energy barrier. Our study highlights the tremendous potential of metal-doped graphdiyne catalysts for facile hydrogen production via NH3 decomposition, enabling safe and scalable hydrogen utilization.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available