화학공학소재연구정보센터
Journal of Materials Science, Vol.56, No.3, 2549-2558, 2021
A facile one-step method for the fabrication of Pd-AlOOH/Al monolithic catalysts via redox reactions of two galvanic cells
In this work, we report a facile and economic one-step method under atmospheric pressure and 50 degrees C water bath for the fabrication of a three-dimensional (3D) upright-standing boehmite (AlOOH) nanosheet array film on a structured Al honeycomb substrate, in which zero-valence palladium (Pd-0) nanoparticles were well distributed at the same time. Redox reactions of two galvanic cells where the Al honeycomb substrate acted as the common anode, but the palladium precursor (Pd(NH3)(4)(2+)) and weak base water (H2O + OH-) served as the electrolyte of cathode I and II, respectively, led to simultaneous formation of Pd(0)nanoparticles at cathode I and AlOOH nanosheets at cathode II on the surface of Al substrate. The resultant AlOOH nanosheet array was uniform and about 300-400 nm thick, and the highly dispersed Pd(0)nanoparticles were also rather small with an average size of 8.4 nm. Hence, the as-obtained Pd-AlOOH/Al monolithic catalysts exhibited high specific surface area and large micro/mesopore structure as compared to pristine Al honeycomb substrate, leading to excellent catalytic activity in total oxidation reaction of toluene.