Breakthroughs in Hydrogen Storage—Formic Acid as a Sustainable Storage Material for Hydrogen

Abstract

A boost for fuel cells: Recent results suggest that formic acid is a convenient hydrogen‐storage material: its decomposition yields CO‐free hydrogen while the co‐produced carbon dioxide can be hydrogenated back to formic acid. The hydrogen generated in this way is suitable for fuel cell applications.

Decomposition of Formic Acid Catalyzed by a Phosphine‐Free Ruthenium Complex in a Task‐Specific Ionic Liquid

“…[1][2][3][4] In this context, one of the most significant challenges of hydrogenbased energy generation is the storage of large quantities of hydrogen at safe pressures. [1] In particular for portable applications, the use of liquid hydrogen has several disadvantages due to its continuous evaporation.…”

Formic Acid Dehydrogenation on Au‐Based Catalysts at Near‐Ambient Temperatures

“…[1][2][3][4] Recent studies have shown that HCOOH decomposition is catalyzed with Ru-based complexes in the aqueous phase at near-ambient temperatures. [5,6] HCOOH decomposition reactions are used frequently to probe the effects of alloying and cluster size and of geometric and electronic factors in catalysis [7][8][9][10] .…”

Product Selectivity in Homogeneous Artificial Photosynthesis Using [(bpy)Rh(Cp*)X]n+-Based Catalysts

“…Due to the rather low volumetric energy density of hydrogen, methods for its incorporation into materials, as well as its temporary introduction into carrier molecules, are under intensive investigation [67,68]. Within this context, formic acid is one possibility of transiently storing H 2 [69]. In order to use molecular hydrogen as a green fuel, efficient catalytic liberation from the storage materials is an important prerequisite for this technology.…”