Recent advancements in solid-state ammonia sorbents

The growing ammonia demand and the need to mitigate its toxicity have raised interest in solid-state ammonia sorbents as a safe alternative to conventional storage systems. This review paper focuses on the development of ammonia storage and thermochemical energy storage, based on research published from 2022 to 2024. Results demonstrate that the two applications have reached different technologies’ maturity. For ammonia storage, the aim was to enhance the sorbent’s performance by novel synthesis routes, whereas a recent shift toward the optimization of systems has been observed for energy storage applications. In our opinion, one should aim for a simplification of the sorbent synthesis route while keeping a look at novel developments to combine the enhancement of both efficiency and stability.