Strong metal-support interaction (SMSI) of Pt/CeO2 and its effect on propane dehydrogenation
نویسندگان
چکیده
Upon reduction at 975 °C, a strong metal-support interaction (SMSI) of CeO2 on Pt NPs leads to low rates for ethylene hydrogenation and propane dehydrogenation, but high olefin selectivity the latter reaction. By contrast, 550 °C Pt/CeO2, 5 nm NP’s with dehydrogenation TORs similar Pt/SiO2. X-ray absorption fine structure (EXAFS) scanning transmission electron microscopy (STEM) shows formation ?15 monometallic nanoparticles partially covered by SMSI CeO2. The propylene was ?95 % suggesting there were few ensembles capable catalysing hydrogenolysis; while remaining exposed remain active reactions.
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ژورنال
عنوان ژورنال: Catalysis Today
سال: 2021
ISSN: ['0920-5861', '1873-4308']
DOI: https://doi.org/10.1016/j.cattod.2020.06.075