Towards green and efficient chemical looping ammonia synthesis: design principles and advanced redox catalysts

Zhang, Xianhua; Pei, Chunlei; Zhao, Zhi-Jian; Gong, Jinlong

doi:10.1039/d4ee00037d

Energy Environ. Sci.

2024

DOI: 10.1039/d4ee00037d

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Towards green and efficient chemical looping ammonia synthesis: design principles and advanced redox catalysts

Xianhua Zhang,

Chunlei Pei,

Zhi-Jian Zhao

et al.

Abstract: Ammonia plays an essential role in agriculture and next-generation energy systems but is currently synthesized industrially through the Haber-Bosh (HB) process under harsh conditions resulting in high CO2 emissions. Chemical...

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Cited by 2 publications

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Metal nitrides as electrocatalysts in green ammonia synthesis

Januszewska-Kubsik,

Podsiadło,

Pudełko

et al. 2024

Appl. Phys. A

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Green ammonia is assumed to be an important part of the European hydrogen economy and one of the most important substrates of chemical industry. The future development of its manufacturing processes can be related to the electrocatalytic studies yielding in the development of the catalytic materials that would effectively break the nitrogen-nitrogen bond to successfully drive the N2RR—a process of molecular nitrogen electroreduction to ammonia. Molecular nitrogen is characterized with strong triple bond energies (942 kJ/mol) which leading into large dissociation energy of N2 (9,76 eV) and also large energy barrier of the first step of triple bond dissociation 410 kJ/mol (4,25 eV). Those large energies makes reduction to ammonia an extremely difficult task. Metal nitrides of d and f block became in interest due to their activity in ammonia production from molecular nitrogen and hydrogen. Practically all the transition elements occurs in one of the four types of crystalline structures: regular, regular face cantered, hexagonal and hexagonal close packed. The reactions of these metals with nitrogen (or ammonia) typically yields in nitride compounds of an identical type of crystalline structure as the initial metal. Dealing with single metal systems, their ternary counterparts and metal–metal nitride heterostructures, the presented review shows that nitrides are promising groups of electrocatalytic materials. Being property-prone to their internal structural features such as non-stoichiometry and correlated concentration of nitrogen vacancies, metal nitrides are a good candidate for joined investigations spanned between electrochemistry, inorganic chemistry and material engineering.

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Metal nitrides as electrocatalysts in green ammonia synthesis

Januszewska-Kubsik,

Podsiadło,

Pudełko

et al. 2024

Appl. Phys. A

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Chemical looping based Low-pressure ammonia synthesis

Guo,

Harrison,

Gao

et al. 2024

Chemical Engineering Journal

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Towards green and efficient chemical looping ammonia synthesis: design principles and advanced redox catalysts

Abstract: Ammonia plays an essential role in agriculture and next-generation energy systems but is currently synthesized industrially through the Haber-Bosh (HB) process under harsh conditions resulting in high CO2 emissions. Chemical...

Cited by 2 publications

References 158 publications

Metal nitrides as electrocatalysts in green ammonia synthesis

Metal nitrides as electrocatalysts in green ammonia synthesis

Chemical looping based Low-pressure ammonia synthesis

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