Demonstrates improved ammonia decomposition activity in low temperatures using hetero-cation doping and electric fields, suggesting enhanced efficiency for hydrogen production.
Ammonia is attracting attention as a carbon-free hydrogen carrier with high hydrogen content and good handling properties, although its endothermic decomposition requires high temperatures (>773 K). We previously achieved nearly complete ammonia conversion even at 398 K via an electric field (EF)-assisted catalytic reaction, in which hydrogen conduction on the catalyst surface (i.e., surface protonics) plays a key role. This study reveals a clear correlation between the catalyst's hydrogen adsorption capacity and EF-assisted ammonia decomposition activity. Mechanistic analyses suggest that enhanced hydrogen transfer from Ru to a support with high hydrogen adsorption capacity promotes surface proton conduction, thereby improving catalytic activity under an EF.
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Hayashi et al. (2026) studied this question.
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