Abstract
Hollandite-type K1.88Ga1.88Sn6.12O16 and K1.58Ga1.58Ti6.42O16 powders obtained by the solid-state reaction method were examined by DRIFT spectroscopy to evaluate their NO adsorption properties. Two key findings were deduced from the refined structure information and evaluation of NO adsorption on a hollandite surface: first, the presence of oxygen in carrier gas contributed significantly to NO adsorption; second, the occupation probability and atomic coordinate of alkaline-metal at the end of the one-dimensional tunnel structure influenced the adsorption volume per unit cell.
Highlights
Hollandite-type compounds have hitherto studied as the one-dimensional fast ionic conductor [1,2,3], as the nuclear waste immobilizers [4, 5] and as NOx reduction catalysts [6, 7]
Two key findings were deduced from the refined structure information and evaluation of NO adsorption on a hollandite surface: first, the presence of oxygen in carrier gas contributed significantly to NO adsorption; second, the occupation probability and atomic coordinate of alkaline-metal at the end of the one-dimensional tunnel structure influenced the adsorption volume per unit cell
These results indicated that the NO adsorption on the hollandite compound surface required oxygen gas and manifested a pattern consistent with chemisorption
Summary
Hollandite-type compounds have hitherto studied as the one-dimensional fast ionic conductor [1,2,3], as the nuclear waste immobilizers [4, 5] and as NOx reduction catalysts [6, 7]. Abstract Hollandite-type K1.88Ga1.88Sn6.12O16 and K1.58Ga1.58Ti6.42O16 powders obtained by the solid-state reaction method were examined by DRIFT spectroscopy to evaluate their NO adsorption properties.
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