Bimetallic palladium chromium nanoparticles anchored on amine-functionalized titanium carbides for remarkably catalytic dehydrogenation of formic acid at mild conditions

Heterogeneous catalysis of formic acid dehydrogenation is considered as a promising strategy for safe and efficient hydrogen production and transportation. Herein, we reported the immobilization of the bimetallic PdCr nanoparticles on amine-functionalized titanium carbides (PdCr/NH2-MXene). By the amine group, the ultrafine PdCr NPs with the size of 1.8 nm were well dispersed on MXene. The opti-mized Pd0.7Cr0.3/NH2-MXene system exhibit an excellent activity toward catalyzing FA dehydrogenation, affording the overall turnover frequency (TOF) value of as high as 1906 h(-1) at 323 K. Such an excellent catalytic performance is attributed that the introduction of amine group not only benefits the formation of ultrafine and well-dispersed PdCr NPs, but also modulates the electronic structure of metal catalytic sites, resulting in an enhancement for catalyzing FA dehydrogenation. This work may supply a new strat-egy for development of high-performance bimetallic nanosystem for tremendous catalytic application in the future. (C) 2022 Published by Elsevier Inc.

Automated summary

Heterogeneous catalysis of formic acid dehydrogenation is considered a promising strategy for safe and efficient hydrogen production and transportation. This study reports the immobilization of bimetallic PdCr nanoparticles on amine-functionalized titanium carbides (PdCr/NH2-MXene). The introduction of the amine group not only helps disperse ultrafine PdCr nanoparticles on MXene but also enhances catalytic activity for formic acid dehydrogenation. The optimized Pd0.7Cr0.3/NH2-MXene system exhibits excellent catalytic performance.