Synthesis and Characterization of a H⁺ Exchanged Zirconate

Abstract

A new protonated oxide has been synthesized by ion exchange of lithium by proton in lithium metazirconate, Li 2 ZrO 3 . Easy and complete ion exchange has been achieved in acidic medium. Characterization of the protonated solid by means of XϪray powder diffraction and thermogravimetric analysis allow to propose the nominal formulation "H 2 ZrO 3 ". However vibrational 1991 spectroscopy suggests that a more appropriate formulation would be as an oxyhydroxide ZrO(OH) 2 .

Impact of additives on zirconium oxidation by water: mechanistic insights from first principles

“…Interestingly, an excellent proton conductor has been obtained experimentally by performing ion exchange on Li 2 ZrO 3 , replacing Li + with H + . 7 Although the stability of the model was extensively investigated, only a subset of all calculations for the system is provided here. The choice of grain boundary model is far from unique.…”

“…Interestingly, with Co II it is the low-spin state, which emerges as the ground state. The low-spin 3d 7 electron conguration implies that one e * g is vacant. However, it can be seen that both hydride and the incoming O 2À lone-pair interact mainly with the occupied e * g component due to a Jahn-Teller distortion.…”

Synthesis and characterisation of new MO(OH)2(M = Zr, Hf) oxyhydroxides and related Li2MO3salts

“…Orera et al reported on the synthesis of ZrO(OH) 2 · 0.14H 2 O oxyhydroxide from Li 2 ZrO 3 salt in an aqueous solution of nitric acid. 18 Denisova et al described a method of synthesis and some properties of metatitanic acid H 2 TiO 3 . 19 Yawata reported on recovering lithium ions from hot spring water using H 2 TiO 3 , obtained from Li 2 TiO 3 by an ion exchange reaction.…”

Hydronium Ions on the Surface of a Partially Hydrolyzed α-Zirconium Phosphate: Solid-State 2H and 31P MAS NMR Evidence

“…We suggest the mechanism of hydronium ion formation presented in eqs and where the first step is observed experimentally and a proton transfer in the second step is chemically reasonable. Here the layered ZrOD unit acts as a weak acid similarly to the weak acid H 2 ZrO 3 [better formulated as ZrO­(OH) 2 ], showing a 1 H resonance in a relatively low field of the 1 H MAS NMR spectrum [δ­(iso) = 7.5 ppm] . Thus, the hydronium ion sits on the surface.…”