Pd@Nh2-Sic with Selectivity of Formate for Efficient Dehydrogenation of Formic Acid

Abstract

As an organic material with high hydrogen storage density, formic acid is a liquid hydrogen carrier with broad research prospects. Designing efficient and highly selective dehydrogenating catalysts is the key to realize the application of formic acid's dehydrogenation. In this paper, the impregnation and chemical reduction methods were used to attach ultrafine Pd particles to amine-functionalize SiC to provide a large number of active sites for the dissociation of HCOO*. β-SiC has better performance compares to α-SiC in hydrogen production of formic acid. Among them, Pd@β-SiC(APTES+CIT) has the best catalytic performance for formic acid dehydrogenation, whose TOFinitial reached 9580h-1 at 333K. The TOFinitial value was 1.68 times than which of Pd@α-SiC(APTES+CIT). The strong SMSI relationship between Pd NPs and NH2-SiC greatly enhances the catalytic activity. This study outperforms most of the silica-based catalysts used for formic acid dehydrogenation.

Keywords: SMSI, SiC, Ultrafine, Formic acid, Dehydrogenation