催化作用
分解
氨
氢
制氢
无机化学
化学
反应性(心理学)
钌
化学工程
吸附
材料科学
物理化学
有机化学
医学
替代医学
病理
工程类
作者
Lishan Liu,Feng Gong,Yunlong Xie,Sijun Wang,Yu Qiu,Zhihua Wang,Rui Xiao
出处
期刊:Fuel
[Elsevier]
日期:2023-12-01
卷期号:354: 129320-129320
标识
DOI:10.1016/j.fuel.2023.129320
摘要
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 ℃, 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.
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