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Cover Picture: Study of Lanthanum Manganate and Yttrium‐Stabilized Zirconia‐Supported Palladium Dual‐Bed Catalyst System for the Total Oxidation of Methane: A Study by 18 O 2 / 16 O 2 Isotopic Exchange (ChemCatChem 11/2016)
Author(s) -
Richard Mélissandre,
Can Fabien,
Gil Sonia,
GiroirFendler Anne,
Duprez Daniel,
Bion Nicolas
Publication year - 2016
Publication title -
chemcatchem
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201600609
Subject(s) - manganate , catalysis , lanthanum , inorganic chemistry , yttria stabilized zirconia , oxidation state , yttrium , anaerobic oxidation of methane , methane , materials science , chemistry , palladium , cubic zirconia , oxide , metallurgy , organic chemistry , ceramic , power (physics) , physics , battery (electricity) , quantum mechanics
The Front Cover shows the oxidation of methane on lanthanum manganate and yttrium‐stabilized zirconia‐supported Pd dual‐bed catalyst system. In their Full Paper, Richard et al. focus on the association of manganese perovskite (LaMnO 3 ) and yttrium‐stabilized zirconia (YSZ) materials for total methane oxidation. A significant enhancement of methane abatement activity is achieved over low loading palladium (0.2 wt. % Pd) supported YSZ catalyst in a promising LaMnO 3 +YSZ dual bed system, resulting in a significant increase of the oxidation rate with a correlative decrease of the light‐off temperature of 65 °C. It is concluded that LaMnO 3 upstream activates the triple ground‐state of molecular oxygen into a low‐lying singlet state improving the oxygen activation on the lacunary YSZ surface. Additionally, a Mars‐Van‐Krevelen mechanism was demonstrated at 425 °C using labeled 18 O 2 exchange technical. More information can be found in the Full Paper by Richard et al. on page 1921 in Issue 11, 2016 (DOI: 10.1002/cctc.201501398).