Preparation of Pd/SBA-15-NH2 for Catalytic Dehydrogenation of Formic Acid
The mesoporous silica SBA-15 was prepared and amino-functionalized to obtain a SBA-15-NH2 support.The Pd/SBA-15-NH2 catalyst with ultrafine Pd nanoparticles was prepared by liquid reduction method and used for the dehydrogenation of formic acid.The catalyst was characterized by X-ray diffraction(XRD)and transmission electron microscopy(TEM).The characterization results indicated that Pd nanoparticles are well dispersed on the surface of amino-functionalized SBA-15 and have a small mean particle size of 2.43 nm.The as-synthesized Pd/SBA-15-NH2 catalyst possesses superior activity and 100%H2 selec-tivity toward dehydrogenation of formic acid.A high apparent turnover frequency of 5 610 h-1 can be obtained at 313 K,formic acid/sodium formate ratio of 5∶3 and formic acid con-centration of 5 mol·L-1.
dehydrogenation of formic acidSBA-15amine-functionalizationPd-based cata-lyst
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