Efficient dehydrogenation of high concentration formic acid over PdAu/AC-NH2 catalyst without additives under ambient conditions

Formic acid (FA) is regarded as a promising hydrogen storage material, while designing efficient catalysts for the dehydrogenation of high concentration FA (HCF) is attractive but challenging. Herein, PdAu nanoparticles (NPs) anchored on amine-functionalized commercial active carbon (PdAu/AC-NH2) was synthesized and evaluated for the dehydrogenation of HCF without additives under ambient conditions. The Pd3Au2/AC-NH2 catalyst exhibits durable performance and 100% H2 selectivity when FA concentration is less than or equal to 5 M, and affords an excellent turnover frequency (TOF) of 3300 h-1 for 5 M FA and 603 h-1 for neat FA at 303 K. Subsequent characterizations reveal that Au content affects the surface energy and electron property of Pd on PdAu alloy nanocatalyst, which play an indispensable role on the rate committed step of HCOO* adsorption and C-H cleavage. Besides, ultrafine PdAu NPs (2.20 nm) and amine groups synergistically accelerate the activity. This work may pave the way for HCF-based high hydrogen density storage under ambient conditions.

You have access to this article

Please wait while we load your content... Something went wrong. Try again?

留言 (0)

沒有登入
gif