Review on Ru-Based and Ni-Based Catalysts for Ammonia Decomposition: Research Status, Reaction Mechanism, and Perspectives

作者：Tianxu Su, Bin Guan, Jiefei Zhou, Chunzheng Zheng, Jiangfeng Guo, Junyan Chen, Yaoyao Zhang, Yuheng Yuan, Wenkai Xie, Nanxin Zhou, Hongtao Dang, Bingyu Xu, Zhen Huang · 发表于：Energy & Fuels · 年份：2023 · DOI：10.1021/acs.energyfuels.3c00804 · 被引用次数：136 · 研究领域：Ammonia Synthesis and Nitrogen Reduction、Hydrogen Storage and Materials、Catalytic Processes in Materials Science

Hydrogen (H 2 ) is a zero-carbon and high-energy-density fuel promising to replace fossil fuels for power generation and clean energy. However, hydrogen still faces enormous challenges in terms of production, transportation, and storage. Ammonia (NH 3 ) is a promising H 2 (17.7 wt %) carrier that easily overcomes the difficulties associated with H 2 storage and transport. However, for the NH 3 decomposition hydrogen production reaction, the biggest challenge at present is to achieve complete conversion of ammonia under a relatively high space velocity (about 30,000 mL·g cat –1 ·h –1 ) at low-temperature conditions (about 350 °C) with reasonable price catalysts. At present, the most efficient ammonia decomposition catalyst is a Ru-based catalyst doped with K, Ba, and Cs and supported on various carbon supports and metal oxides. Otherwise, the catalysts that exhibited the most outstanding activity among non-noble metal catalysts are nickel-based, and because of their low cost, nickel is regarded as a reasonable alternative candidate material for NH 3 decomposition. Advances in the study of reaction kinetics of ammonia decomposition reactions and whether the rate-determining step of the ammonia decomposition reaction is the cleavage of the first N–H bond or the desorption of nitrogen gas are also discussed. This review provides a comprehensive consideration of the recent development of Ru-based and Ni-based catalysts and proposed mechanisms of ammonia decomposition on them are e...