Novel protonated and hydrated Ruddlesden–Popper phases, HxNa1−xLaTiO4·yH2O, formed by ion-exchange/intercalation reaction

Hydrous protonated forms derived from n=3 Dion–Jacobson-type layered perovskite titanotantalate RbLa2Ti2TaO10: Interlayer reactivity with n-alkylamine

“…The crystal structure of the hydrous NaEuTiO 4 $xH 2 O with xZ0.5 had the space group I4/mmm, while hydrous phase with xZ0.8 was indexed as the space group P4/nmm. Similar structural change has been observed for other protonated form [14]. The present results, however, indicate that the protonated forms derived in this work have the same unit cell.…”

Performance of Solid Alkaline Fuel Cells Employing Layered Perovskite-Type Oxides as Electrolyte

“…However, the thermal stability of AFC is very low, so that attention has recently been increasingly focused on inorganic electrolytes which are stable up to 150°C or higher. In our previous works, n = 3 ruddlesden-popper member [2][3][4][5][6] . In the case of LSF, SCT and LFO preparation, these precursors were weighted in stoichiometric proportions, however, generally RLN and NLT preparation, 30% excess of Rb 2 CO 3 and 50% excess of Na 2 CO 3 , respectively.…”

Neutron diffraction study on protonated and hydrated layered perovskite

“…The starting compound, NaLaTiO 4 , was prepared by the conventional solid-state reaction [7,[12][13][14]. Prior to the preparation, La 2 O 3 was predehydrated at 900 1C for 9 h, because La 2 O 3 agent contains a small amount of La(OH) 3 .…”

“…[1][2][3][4][5][6]. Recently, we have reported the synthesis of new hydrated and protonated layered perovskite compound, H x Na 1Àx LaTiO 4 Á yH 2 O [7], by ionexchange/intercalation reactions of layered perovskite compound, NaLaTiO 4 , which is categorized as a Ruddlesden-Popper family with a general formula of A 0 2 [A nÀ1 B n O 3n+1 ] (A and A 0 ¼ alkali, alkaline or rare earth, B ¼ transition metal) [8]. Furthermore, we have found that the situation of H 3 O + ion and/or H 2 O molecule in the interlayer of hydrated protonated forms derived from RbLa 2 Ti 2 TaO 10 governed the n-alkylamine intercalation into the interlayer, which leads the formation of organic-inorganic complex materials [9].…”