Exceptional Low-Temperature CO Oxidation over Noble-Metal-Free Iron-Doped Hollandites: An In-Depth Analysis of the Influence of the Defect Structure on Catalytic Performance.

ABSTRACT: A family of iron-doped manganese-related hollandites, K _x Mn_1-y Fe _y O_2-δ (0 ≤ y ≤ 0.15), with high performance in CO oxidation have been prepared. Among them, the most active catalyst, K_0.11Mn_0.876Fe_0.123O_1.80(OH)_0.09, is able to oxidize more than 50% of CO at room temperature. Detailed compositional and structural characterization studies, using a wide battery of thermogravimetric, spectroscopic, and diffractometric techniques, both at macroscopic and microscopic levels, have provided essential information about this never-reported behavior, which relates to the oxidation state of manganese. Neutron diffraction studies evidence that the above compound stabilizes

SUBMITTER: Gomez-Recio I 

PROVIDER: S-EPMC8713355 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature