Synthesis for catelysis of bifunctional perovskite compound
AssigneeNational Chiao Tung University
InventorsPu-Wei Wu, Yun-Min Chang
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Abstract
This invention discloses the synthesis of a bifunctional La0.6Ca0.4Co1-xIrxO3 (x=0˜1) perovskite compound with a superb bifunctional catalytic ability for the oxygen reduction and generation in alkaline electrolytes. Synthetic routes demonstrated include solid state reaction, amorphous citrate precursor, and mechanical alloying. The interested compound demonstrates notable enhancements over commercially available La0.6Ca0.4CoO3.
Claims12
A method for synthesizing a bifunctional perovskite compound, comprising:
- dissolving respectively a lanthanum nitrate, a calcium nitrate, a cobalt nitrate and a iridium chloride in a water to form a plurality of aqueous solutions;
- mixing and agitating the plurality of aqueous solutions to form a mixture;
- preparing a saturated citric acid aqueous solution, wherein the saturated citric acid and a plurality of metal ions having the same moles;
- mixing the mixture and the saturated citric acid aqueous solution;
- heating the mixture and the saturated citric acid aqueous solution to form a metal sol;
- drying the metal sol;
- grinding the dry metal sol to obtain a precursor powder;
- heating the precursor powder;
- and
- cooling the precursor powder to prepare the perovskite compound.
A method for synthesizing a bifunctional perovskite compound, comprising:
- mixing lanthanum nitrate, calcium nitrate, cobalt nitrate and iridium chloride powders to form a powder mixture;
- sintering the powder mixture;
- cooling the sintered powder mixture;
- drying the powder mixture;
- heating the powder mixture;
- and
- cooling the powder mixture to prepare the perovskite compound.
A bifunctional perovskite compound, wherein the chemical composition of perovskite compound comprises La0.6Ca0.4Co1-xIrxO3 (x=0˜1).
A bifunctional perovskite compound, wherein the chemical composition of perovskite compound comprises La0.6Ca0.4CoIr0.25O3.5-δ.
Dependencies are inferred from the claim text.