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    Isotopic Transient Kinetic Analysis of Soot Oxidation on Mn<sub>3</sub>O<sub>4</sub>, Mn<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>, and CeO<sub>2</sub> Catalysts in Tight Contact Conditions by Marek Rotko, Karolina Karpińska-Wlizło

    Published 2025-01-01
    “…The reaction mechanism of soot oxidation on Mn (Mn<sub>3</sub>O<sub>4</sub>), Mn-Ce (Mn<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>), and Ce (CeO<sub>2</sub>) catalysts in tight contact conditions was investigated using ITKA (isotopic transient kinetic analysis). The obtained results suggest that lattice-bulk oxygen from all studied catalysts takes part in the soot oxidation process but with varying relative contributions: for the Ce catalyst, this contribution is practically 100%, whereas with decreasing Ce content in Mn-Ce catalysts, the significance of lattice-bulk oxygen for soot oxidation diminishes. …”
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    Mélange dehydration and melting beneath South Sandwich Islands arc by Yunchao Shu, Sune G. Nielsen, Veronique Le Roux, Danielle Santiago Ramos, Jerzy Blusztajn, Maureen Auro, Phil T. Leat, Tristan J. Horner

    Published 2025-02-01
    “…Here we show substantial barium isotope variations coupled with invariant strontium isotope ratios in arc lavas, consistent with mélange mobilization beneath the arc. …”
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