Bimetallic Palladium Chromium Nanoparticles Loaded on Amino-Modified Mullite Smmn2o5 to Effectively Improve the Efficiency of Formic Acid Dehydrogenation

Abstract

Catalytic hydrogen production from formic acid has been reported to be an efficient way for hydrogen generation and storage. In this study, the mullite SmMn2O5 is first synthesized by co-precipitation, and then the extra-fine bimetallic PdCr NPs with dimensions of 2.05 nm are successfully anchored on the surface of amine-functionalized SmMn2O5 by a one-step wet chemical method. The obtained PdCr/OPDA-SmMn2O5 shows alright catalytic activity and the turnover frequency (TOF) value of 1028 h-1 at 323 K, which is in line with most reports. Notably, the catalyst remains stable and active under five cycle performance tests, with no significant agglomeration after the reaction. The remarkable catalytic performance is attributed to the formation of small-sized and highly dispersed PdCr NPs after the introduction of amino groups. In addition, the synergistic effect between the bimetal and the carrier effectively accelerates the catalytic efficiency of the bimetal system.

Keywords: PdCr, SmMn2O5, formic acid, dehydrogenation