Аннотация

A new approach for preparing a PtOx/CeO2 catalyst for low-temperature CO oxidation has been developed. The approach includes; i) preparation of a CeO2 support through the controllable thermal decomposition of Ce(NO3)3 ⋅ 6H2O, and then ii) deposition of polynuclear platinum nitrato complexes ([H3O⊂18-crown-6]2[Pt22-OH)2(NO3)8][Pt43-OH)22-OH)4(NO3)10]) on the CeO2 support. The NO3 -rich ceria support produced at the onset temperature of Ce(NO3)3 -> CeO2 transformation (220 °C) yields the “PtOx/CeO2-220” catalyst that shows intriguingly high activity in CO oxidation, at room temperature and below. To understand the nature of the low-temperature catalytic activity, prepared catalysts have been studied using X-ray photoelectron spectroscopy (XPS), Raman and operando X-ray absorption fine structure spectroscopy (XAFS) and transmission electron microscopy (TEM).

Язык оригиналаанглийский
Страницы (с-по)1413-1428
Число страниц16
ЖурналChemCatChem
Том12
Номер выпуска5
DOI
СостояниеОпубликовано - 6 мар 2020

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