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Delgado Gómez M, Marazzi M, Elguero J, Ferrer M, Alkorta I. Production of Dihydrogen Using Ammonia Borane as Reagent and Pyrazole as Catalyst. Chemphyschem 2023; 24:e202300214. [PMID: 37350535 DOI: 10.1002/cphc.202300214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 06/14/2023] [Accepted: 06/23/2023] [Indexed: 06/24/2023]
Abstract
Theoretical chemistry (DLPNO-CCSD(T)/def2-TZVP//M06-2x/aug-cc-pVDZ) was used to design a system based on ammonia boranes catalyzed by pyrazoles with the aim of producing dihydrogen, nowadays of high interest as clean fuel. The reactivity of ammonia borane and cyclotriborazane were investigated, including catalytic activation through 1H-pyrazole, 4-methoxy-1H-pyrazole, and 4-nitro-1H-pyrazole. The results point toward a catalytic cycle by which, at the same time, ammonia borane can initially store and then, through catalysis, produce dihydrogen and amino borane. Subsequently, amino borane can trimerize to form cyclotriborazane that, in presence of the same catalyst, can also produce dihydrogen. This study proposes therefore a consistent progress in using environmentally sustainable (metal free) catalysts to efficiently extract dihydrogen from small B-N bonded molecules.
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Affiliation(s)
- Marta Delgado Gómez
- Universidad de Alcalá, Departamento de Química Analítica, Química Física e Ingeniería Química, Ctra. Madrid-Barcelona, Km 33,600, 28871 Alcalá de Henares, Madrid, Spain
| | - Marco Marazzi
- Universidad de Alcalá, Departamento de Química Analítica, Química Física e Ingeniería Química, Ctra. Madrid-Barcelona, Km 33,600, 28871 Alcalá de Henares, Madrid, Spain
- Universidad de Alcalá, Instituto de Investigación Química "Andrés M. del Río" (IQAR), 28871 Alcalá de Henares, Madrid, Spain
| | - José Elguero
- Instituto de Química Médica CSIC, Juan de la Cierva, 3, 28006, Madrid, Spain
| | - Maxime Ferrer
- Instituto de Química Médica CSIC, Juan de la Cierva, 3, 28006, Madrid, Spain
- PhD Program in Theoretical Chemistry and Computational Modeling, Doctoral School, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Ibon Alkorta
- Instituto de Química Médica CSIC, Juan de la Cierva, 3, 28006, Madrid, Spain
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