State-of-the-art Catalysts for Hydrogen Storage in Liquid Organic Hydrogen Carriers

Abstract

Liquid organic hydrogen carrier (LOHC) systems have recently gained great importance as a means for hydrogen storage and transportation. Since fast hydrogen storage into H-2-lean organic molecules under mild conditions is an urgent issue in LOHC systems, the present review highlights recent advances in hydrogenation catalysts for aromatic and heteroaromatic LOHC compounds. The activity results of supported noble metal (mainly, Ru and Pt) and transition metal (typically, Ni) catalysts are discussed along with key catalyst properties including metal dispersion, H-2 and substrate adsorption capacities, and hydrogen spillover by strong metal-support interaction. This contribution will serve as a guide to design and synthesize an efficient and durable hydrogenation catalyst towards practical LOHC systems in the near future.