Mattia Bartoli, Marco Etzi, Stefania Lettieri, Giuseppe Ferraro, Candido Fabrizio Pirri, Angelica Monica Chiodoni, Sergio Bocchini
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引用次数: 0
Abstract
The utilization of red mud is a topic of significant interest due to its great production around the world, being the major by-product of alumina production. Nevertheless, its correct valorization is a matter of great complexity. In this work, we propose a novel use of red mud as a catalyst for the release of hydrogen from hydrolysis of ammonia borane in mild conditions. Ammonia borane is among the best chemical hydrogen carriers with a gravimetric hydrogen capability of up to 19 wt% but is characterized by a complex reactivity under thermal stimuli. Accordingly, ammonia borane hydrolysis has emerged as a solid route for direct and safe hydrogen release. In this work, we achieved complete hydrolysis of ammonia borane both at 30 °C and 40 °C after 660 s and 12 s, respectively, with a red mud loading of 10 wt%. The addition of red mud decreased the activation energy of the hydrolysis reaction over 90% and increased the kinetic constant over two orders of magnitude. Furthermore, red mud preserved the catalytic activity after three cycles with no significant changes.
期刊介绍:
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.