Inorganic Chemicals Industry ›› 2023, Vol. 55 ›› Issue (3): 21-27.doi: 10.19964/j.issn.1006-4990.2022-0309

• Reviews and Special Topics • Previous Articles     Next Articles

Research progress of cocatalyst of nicke-based catalyst system for hydrogen production from ammonia decomposition

ZHANG Lingfeng(), FAN Yajuan, MAO Chenchen, WU Shiguo, GU Hongxia   

  1. Changzhou Vocational Institute of Engineering,Changzhou 213164,China
  • Received:2022-05-20 Online:2023-03-10 Published:2023-03-17

Abstract:

As a globally accepted clean energy carrier,hydrogen has attracted much attention.Catalytic ammonia decomposition reaction is one of the important ways to obtain CO x -free H2.Ni-based catalysts have great potential to be used in industry because of their good economy and catalytic activity.However,compared with the noble metal catalyst Ru,Ir,Pt,the Ni-based catalytic reaction system needs higher reaction temperature and increases the reaction energy consumption.In addition,high-temperature reaction conditions are also easy to cause the sintering of active components,resulting in the decrease of activity.Cocatalysts,such as alkali metals,alkaline earth metals and rare earth metals,have significant effects on improving the performance of Ni-based catalysts.Combining with the reaction mechanism of Ni-based catalyst for ammonia decomposition to hydrogen,the influence of the introduction of cocatalysts on the improvement of catalyst performance was discussed in detail.It was mainly reflected in changing the acidity and alkalinity,metal dispersion,particle size and stability of the catalyst.Finally,the development direction of nickel-based cocatalyst was reasonably prospected.It was pointed out that the catalysts should be studied from the perspective of in-situ characterization,the preparation method at atomic scale should be explored for precise regulation,and the mechanism of the promoter should be further explored.

Key words: ammonia decomposition, hydrogen production, cocatalyst, nicke-based catalyst

CLC Number: