HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
Ammonia has been converted into hydrazine, a chemical of utmost importance for organic synthesis and energy purposes. In their Communication on page 25230, François Jérôme et al. report that cavitation bubbles, created by ultrasonic irradiation of aqueous ammonia at a high frequency, act as microreactors to activate and convert ammonia into hydrazine at the gas–liquid interface. Maintaining the aqueous solution close to 30 °C prevents the degradation of in situ produced hydrazine.
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