Significant Lanthanoid Substitution Effect on the Redox Reactivity of the Oxygen-Storage Material BaYMn2O5+δ
Source abstract
Abstract
The redox characteristics of oxygen storage materials BaLnMn 2 O 5+δ, with Ln = La, Nd, Gd, and Y, were investigated employing the reductive water dissolution by the deoxygenated δ = 0 form. The Ln = La, Nd, and Gd compounds were found to show a capability to produce hydrogen gas through the water dissolution at 500 °C, whereas the Ln = Y compound was unreactive to water. It was also revealed that the reactivity obviously depends upon the Ln species: the larger the ionic size of Ln 3+, the higher reactivity the BaLnMn 2 O 5.0 samples exhibit. The experimentally derived thermodynamic parameters of the BaLnMn 2 O 5+δ series were compared to those obtained by first-principles calculations.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Chemical Looping and Thermochemical Processes · Catalysis and Oxidation Reactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Materials and Life Chemistry, Kanagawa University, Yokohama, Kanagawa 221-8686, Japan
Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-0808, Japan
Funding
Japan Society for the Promotion of Science · Verband der Chemischen Industrie
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