Abstract
Hydrous hydrazine (N2H4∙H2O) is a candidate for a hydrogen carrier for storage and transportation due to low material cost, high hydrogen content of 8.0%, and liquid stability at room temperature. Pt and Pt nanoalloy catalysts have been welcomed by researchers for the dehydrogenation of hydrous hydrazine recently. Therefore, in this review, we give a summary of Pt nanoalloy catalysts for the dehydrogenation of hydrous hydrazine and briefly introduce the decomposition mechanism of hydrous hydrazine to prove the design principle of the catalyst. The chemical characteristics of hydrous hydrazine and the mechanism of dehydrogenation reaction are briefly introduced. The catalytic activity of hydrous hydrazine on different supports and the factors affecting the selectivity of hydrogen catalyzed by Ni-Pt are analyzed. It is expected to provide a new way for the development of high-activity catalysts for the dehydrogenation of hydrous hydrazine to produce hydrogen.
Highlights
Hydrogen energy, as a kind of green energy with abundant reserves, wide sources, and high energy density, has shown an excellent application prospect in fuel cells and as a substitute for fossil fuels [1,2,3,4]
The catalytic activity of hydrous hydrazine on different supports and the factors affecting the selectivity of hydrogen catalyzed by Ni-Pt are analyzed
The results show that the synthesized NP-carbon nanodots (CNDs) catalyst has high activity for hydrous hydrazine decomposition at room temperature
Summary
As a kind of green energy with abundant reserves, wide sources, and high energy density, has shown an excellent application prospect in fuel cells and as a substitute for fossil fuels [1,2,3,4]. Hydrogen storage methods can be roughly divided into physical methods [7,8] and chemical methods [9,10], which have made some progress in a certain extent. Based on the liquid organic hydride, hydrogen storage technology in chemical methods, owing to large hydrogen storage capacity, high energy density, and safe and convenient liquid storage and transportation [11,12,13], has attracted the attention of scholars. Hydrazine is an extremely dangerous substance and is not suitable as a hydrogen storage material [14,15], but hydrous hydrazine (N2 H4 ·H2 O), as a liquid hydrogen storage material with excellent hydrogen storage content (8.0 wt%)—the only by-product when completely decomposed is N2 , which has no pollution to the environment—has always been considered to have great prospects [16,17,18,19]
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