Highly Efficient Dehydrogenation of Formic Acid over a Palladium-Nanopai tide-Based Mott-Schottky Photocatalyst

摘要

The high energy density of formic acid (FA) along with its low toxicity, low cost, and high stability make it a promising hydrogen carrier for safe hydrogen storage and hydrogen-based green-energy applications. FA has been obtained in large quantities by the hydrogenation of waste carbon dioxide from industry, biomass processing, and artificial photosynthesis. Thus, the catalytic dehydrogenation of FA with the release of hydrogen gas under mild conditions can meet the increasing demand for alternative technologies for the generation of hydrogen in a morje sustainable manner. The development of efficient catalysts remains the main hurdle for practical applications of this approach. The dehydrogenation of FA can be catalyzed by homogeneous metal complexes or clusters with high hydrogen-evolution rates by the addition of a base and/or organic ligands.Alternatively, heterogeneous catalysts based on metal nanoparticles may be used. Such catalysts are generally more recyclable and stable but less active than their homogeneous counterparts. The ideal sustainable catalyst should be recyclable, inexpensive, and efficient for the dehydrogenation of FA in pure water or without a solvent in the absence of any other additives at ambient temperature.