Advances in Nonprecious Metal Homogeneously Catalyzed Formic Acid Dehydrogenation
Formic acid (FA) possesses a high volumetric concentration of H<sub>2</sub> (53 g L<sup>−1</sup>). Moreover, it can be easily prepared, stored, and transported. Therefore, FA stands out as a potential liquid organic hydrogen carrier (LOHC), which allows storage and transporta...
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oai:doaj.org-article:5c937fb40e0e4d1f9318e507742f15dd2021-11-25T17:05:28ZAdvances in Nonprecious Metal Homogeneously Catalyzed Formic Acid Dehydrogenation10.3390/catal111112882073-4344https://doaj.org/article/5c937fb40e0e4d1f9318e507742f15dd2021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1288https://doaj.org/toc/2073-4344Formic acid (FA) possesses a high volumetric concentration of H<sub>2</sub> (53 g L<sup>−1</sup>). Moreover, it can be easily prepared, stored, and transported. Therefore, FA stands out as a potential liquid organic hydrogen carrier (LOHC), which allows storage and transportation of hydrogen in a safe way. The dehydrogenation to produce H<sub>2</sub> and CO<sub>2</sub> competes with its dehydration to give CO and H<sub>2</sub>O. For this reason, research on selective catalytic FA dehydrogenation has gained attention in recent years. Several examples of highly active homogenous catalysts based on precious metals effective for the selective dehydrogenation of FA have been reported. Among them are the binuclear iridium-bipyridine catalysts described by Fujita and Himeda et al. (TOF = 228,000 h<sup>−1</sup>) and the cationic species [IrClCp*(2,2′-bi-2-imidazoline)]Cl (TOF = 487,500 h<sup>−1</sup>). However, examples of catalytic systems effective for the solventless dehydrogenation of FA, which is of great interest since it allows to reduce the reaction volume and avoids the use of organic solvents that could damage the fuel cell, are scarce. In this context, the development of transition metal catalysts based on cheap and easily available nonprecious metals is a subject of great interest. This work contains a summary on the state of the art of catalytic dehydrogenation of FA in homogeneous phase, together with an account of the catalytic systems based on non-precious metals so far reported.Manuel IglesiasFrancisco J. Fernández-AlvarezMDPI AGarticlehomogeneous catalysisformic acid dehydrogenationnonprecious metalsliquid hydrogen carriersChemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1288, p 1288 (2021) |
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homogeneous catalysis formic acid dehydrogenation nonprecious metals liquid hydrogen carriers Chemical technology TP1-1185 Chemistry QD1-999 |
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homogeneous catalysis formic acid dehydrogenation nonprecious metals liquid hydrogen carriers Chemical technology TP1-1185 Chemistry QD1-999 Manuel Iglesias Francisco J. Fernández-Alvarez Advances in Nonprecious Metal Homogeneously Catalyzed Formic Acid Dehydrogenation |
description |
Formic acid (FA) possesses a high volumetric concentration of H<sub>2</sub> (53 g L<sup>−1</sup>). Moreover, it can be easily prepared, stored, and transported. Therefore, FA stands out as a potential liquid organic hydrogen carrier (LOHC), which allows storage and transportation of hydrogen in a safe way. The dehydrogenation to produce H<sub>2</sub> and CO<sub>2</sub> competes with its dehydration to give CO and H<sub>2</sub>O. For this reason, research on selective catalytic FA dehydrogenation has gained attention in recent years. Several examples of highly active homogenous catalysts based on precious metals effective for the selective dehydrogenation of FA have been reported. Among them are the binuclear iridium-bipyridine catalysts described by Fujita and Himeda et al. (TOF = 228,000 h<sup>−1</sup>) and the cationic species [IrClCp*(2,2′-bi-2-imidazoline)]Cl (TOF = 487,500 h<sup>−1</sup>). However, examples of catalytic systems effective for the solventless dehydrogenation of FA, which is of great interest since it allows to reduce the reaction volume and avoids the use of organic solvents that could damage the fuel cell, are scarce. In this context, the development of transition metal catalysts based on cheap and easily available nonprecious metals is a subject of great interest. This work contains a summary on the state of the art of catalytic dehydrogenation of FA in homogeneous phase, together with an account of the catalytic systems based on non-precious metals so far reported. |
format |
article |
author |
Manuel Iglesias Francisco J. Fernández-Alvarez |
author_facet |
Manuel Iglesias Francisco J. Fernández-Alvarez |
author_sort |
Manuel Iglesias |
title |
Advances in Nonprecious Metal Homogeneously Catalyzed Formic Acid Dehydrogenation |
title_short |
Advances in Nonprecious Metal Homogeneously Catalyzed Formic Acid Dehydrogenation |
title_full |
Advances in Nonprecious Metal Homogeneously Catalyzed Formic Acid Dehydrogenation |
title_fullStr |
Advances in Nonprecious Metal Homogeneously Catalyzed Formic Acid Dehydrogenation |
title_full_unstemmed |
Advances in Nonprecious Metal Homogeneously Catalyzed Formic Acid Dehydrogenation |
title_sort |
advances in nonprecious metal homogeneously catalyzed formic acid dehydrogenation |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doaj.org/article/5c937fb40e0e4d1f9318e507742f15dd |
work_keys_str_mv |
AT manueliglesias advancesinnonpreciousmetalhomogeneouslycatalyzedformicaciddehydrogenation AT franciscojfernandezalvarez advancesinnonpreciousmetalhomogeneouslycatalyzedformicaciddehydrogenation |
_version_ |
1718412713646882816 |